WorldWideScience

Sample records for sup119mte sup121mte sup121te

  1. Astrophysical s-factor measurements for {sup 1}20Te(p,{gamma}){sup 1}21I and {sup 1}20Te(p,n){sup 1}20I reactions; {sup 1}20Te(p,{gamma}){sup 1}21I ve {sup 1}20Te(p,n){sup 1}20I reaksiyonlarinin astrofiziksel s-factor oelcuemleri

    Energy Technology Data Exchange (ETDEWEB)

    Gueray, R T; Oezkan, N; Yalcin, C [Kocaeli University, Kocaeli (Turkey); Goerres, J; DeBoer, R; Palumbo, A; Tan, W P; Wiescher, M [University of Notre Dame, (United States); Fueloep, Zs; Somorjai, E [Institute of Nuclear Research ATOMKI (Hungary); Lee, H Y [Argonne National Laboratory (United States)

    2009-07-01

    Astrophysical S-factors for the {sup 1}20Te(p,{gamma}){sup 1}21I and {sup 1}20Te(p,n){sup 1}20I reactions have been measured in the effective center-of-mass energies between 2.47 MeV and 7.93 MeV. Experimental data have been compared with the Hauser-Fesbach statistical model calculations obtained with the model codes NON-SMOKER and TALYS. The discrepancies between the experimental results and calculations can mainly be attributed to the optical model potentials used in the codes.

  2. Nuclear decay scheme studies of 30-h 131Te/sup m/, 25-min 131Te/sup g/, and 55.5-min 105Cd

    International Nuclear Information System (INIS)

    Jackson, S.V.

    1975-01-01

    High-resolution Ge(Li) detectors have been used to observe γ-ray singles and coincidence spectra of 30-h 11 / 2 - , /sup 131m/Te, 25-min 3 / 2 + , and 55.5-min 5 / 2 + 105 Cd. Sources of /sup 131m/Te and /sup 131g/Te were produced by neutron irradiation of enriched 130 Te metal, and, in the case of /sup 131m/Te, were chemically purified to remove the 131 I daughter. A total of 190 and 80 γ-rays are attributed to the decays of /sup 131m/Te and /sup 131g/Te, respectively; and 174 and 77 of these transitions have been placed in a 131 I level scheme involving 52 excited states. Absolute β group intensities were determined for the transitions to 131 I levels. Spin and parity assignments were made for all observed levels. The β feeding from the 11 / 2 - /sup 131m/Te to the 7 / 2 + 131 I ground state was determined to be (5.2 +- 3.0) percent (log ft = 10.5). The isomeric transition of 11 / 2 - /sup 131m/Te to 3 / 2 + /sup 131g/Te was determined to be (22.2 +- 1.6) percent. The 6-nsec isomer in 131 I at 1797 keV has been assigned as 15 / 2 - and interpreted as a πν 1 ν 2 three quasi-particle state. Sources of 105 Cd were produced via the 106 Cd(n,2n) reaction on enriched 106 CdO using 14 MeV neutrons. A total of 274 γ-rays are attributed to the decay of 105 Cd, and 248 of these have been placed in a 105 Ag level scheme involving 50 excited states. Absolute values for the β + /EC transition intensities to 105 Ag levels were determined. The β + /EC feeding from the 5 / 2 + 105 Cd to the 7 / 2 + 25.5-keV isomeric state in 105 Ag was determined to be (51.4 +- 4.0) percent (log ft = 5.4). The experimentally determined level structures of 131 I and 105 Cd are interpreted in terms of the shell model and core excitation considerations with emphasis placed on the core coupling model and the three-particle models. (U.S.)

  3. Proton-activation technique for the determination of antimony

    International Nuclear Information System (INIS)

    Krivan, V.; Barth, P.

    1979-01-01

    Photon-activation analysis has been applied to the determination of antimony. Thick-target yields and analytical sensitivities are given for the indicator-radionuclides sup(119m)Te, sup(119g)Te, sup(121m)Te, sup(121g)Te, sup(123m)Te, sup(120m)Sb and sup(122g)Sb for proton energies between 9 and 25 MeV. In irradiations with a 5-μA beam for 5 hr, followed by a specific separation of the indicator-radionuclides, limits of detection at the ppm level can be achieved. Data are given for the most significant interfering reactions. Antimony was determined instrumentally in bismuth of very pure grade and the results are compared with those obtained from two independent techniques. (author)

  4. TIME-DEPENDENT MOSSBAUER-SPECTROSCOPY AND 119MTE-IMPLANTED GAAS

    NARCIS (Netherlands)

    MO, D; ZHANG, GL; NIESEN, L; Waard , de Hendrik

    1991-01-01

    A new type of time-dependent Mossbauer spectroscopy is proposed and realized on the basis of using the two-step decay (119m)Te --> 113Sb --> Sn-119. For the GaAs samples, implanted with a dose of 110-keV (119m)Te + 10(15) stable Te/cm2 and annealed at 600-degrees-C, the relative intensities of

  5. Foliar contamination of Phaseolus vulgaris with aerosols of {sup 137}Cs, {sup 85}Sr, {sup 133}Ba and {sup 123m}Te: influence of plant development stage upon contamination and rain

    Energy Technology Data Exchange (ETDEWEB)

    Madoz-Escande, C. E-mail: chantal.madoz-escande@irsn.fr; Henner, P.; Bonhomme, T

    2004-07-01

    As part of a requirement to improve the assessment of the impact of radioactive fallout on consumed agricultural products, bean plants at four development stages (seedlings, preflowering, late flowering and mature plants) were contaminated by dry deposition of {sup 137}Cs, {sup 85}Sr, {sup 133}Ba and {sup 123m}Te aerosols. The influence of two rain scenarios and of the development stage upon contamination on interception, retention, and translocation to pods was studied. Interception of the four radionuclides was almost identical and varied from 30 to 60% with increasing development stage. The most important rain parameter was the time which elapsed between contamination and the first rain. Whatever the development stage, rain washed off more cesium from the leaves when it occurred 2 days after the deposit (37% at the seedling stage, for example) rather than later on (6 days, 27%), due to rapid migration of Cs in the plant. The first rain washed off nearly 40% of Ba whatever the scenario. For later stages, Sr and Ba were more washed off by heavy weekly rains than by weak twice-a-week rains, perhaps because of the Sr/Ba-contaminated material loss associated with wash off (desquamation of cuticles). Te showed little wash off (less than 5%). Wash off decreased with an older development stage for a weak rain intensity, due to the superimposition of leaves. Heavy rains removed this shelter effect. At harvest, rain effect was no longer detectable as foliar activity was similar for both rain scenarios. Translocation factors (TF) for strontium and barium increased from 6x10{sup -3} to 1x10{sup -1} with the plant development stage upon contamination, whereas those for cesium remained almost unchanged between 2x10{sup -1} and 4 x 10{sup -1}. Flowering is the most critical stage towards residual contamination in pods at harvest, with the exception of direct deposit on pods at the mature stage (TF values are one order of magnitude higher). TF value for Te was 6.5x10{sup -2

  6. Nature of the 153 and 270 keV transitions in /sup 119/Sb from sup(119m)Te

    Energy Technology Data Exchange (ETDEWEB)

    Sahota, H S [Punjabi Univ., Patiala (India). Dept. of Physics

    1982-08-01

    The 153 and 270 keV transitions in /sup 119/Sb have been investigated for the presence of any anomalous conversion through conversion electron intensity and conversion-electron gamma and gamma-gamma directional correlation measurements. The resulting subshell ratios and particle rarameters have been analysed for the accurate determination of mixing ratios for the transitions. The results are delta/sub 153/ = +-0.0025 and delta/sub 270/ = 0.10 sub(-0.20)sup(+0.03). The conversion process has been found to be normal in both cases.

  7. High spin {gamma}-ray spectroscopy of {sup 121,122}Xe

    Energy Technology Data Exchange (ETDEWEB)

    Timmers, H [Liverpool Univ. (United Kingdom). Oliver Lodge Lab.; [Department of Physics, SUNY at Stony Brook, NY (United States); Riley, M A; Hanna, F; Mullins, S M; Sharpey-Schafer, J F [Liverpool Univ. (United Kingdom). Oliver Lodge Lab.; Hughes, J R; Fossan, D B; Liang, Y; Ma, R; Xu, N [Department of Physics, SUNY at Stony Brook, NY (United States); Simpson, J; Bentley, M A [Daresbury Lab. (United Kingdom); Bengtsson, T [Lund Univ. (Sweden). Dept. of Mathematical Physics; Wyss, R [Institute for Heavy Ion Research, Oak Ridge, TN (United States)

    1992-08-01

    High-spin states have been populated in {sup 121,122}Xe using the reactions {sup 108}Pd({sup 16}O,3n){sup 121}Xe at 65 MeV and {sup 96}Zr({sup 30}Si,4n/5n){sup 122}Xe/{sup 121}Xe at 135 MeV. Coincident {gamma} rays following the neutron evaporation were detected by six Compton-suppressed Ge detectors and the TESSA3 array respectively. The level structure of {sup 121}Xe and {sup 122}Xe has been extended up to 47/2 {Dirac_h} and 32 {Dirac_h} respectively. In {sup 121}Xe a coupled band was found feeding the 19/2{sup -} level. In {sup 122}Xe several decays are suggested to be a sequence of stretched E2 quadrupole transitions connecting states of positive parity. While in {sup 121}Xe this phenomenon was not observed, at high spin a phase transition from prolate collective rotation to oblate single particle excitation was detected in {sup 122}Xe. For the new, probably positive parity side band in{sup 122}Xe a four quasi-neutron or a two quasi-proton configuration of h{sub 11/2} quasi-nucleons might be considered. The positive parity high spin structure in {sup 122}Xe contains three I{sup {pi}} = 22{sup +} states of different character. This is predicted by TRS (total Routhian surface) calculations, which identify these states as two shapes with predominantly prolate collective characteristic and the third as an oblate single particle configuration. 12 refs., 3 figs.

  8. Determination of the {sup 121}Te gamma emission probabilities associated with the production process of radiopharmaceutical NaI[{sup 123}I

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, M.T.F.; Lopes, R.T., E-mail: maraujo@con.ufrj.br, E-mail: miriamtaina@hotmail.com [Coordenacao dos Cursos de Pos-Graduacao em Engenharia (LIN/PEN/COPPE/UFRJ), RJ (Brazil). Programa de Engenharia Nuclear. Lab. de Instrumentacao Nuclear; Poledna, R.; Delgado, J.U.; Almeida, M.C.M. de; Silva, R.L. [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ/LNMRI), Rio de Janeiro, RJ (Brazil). Lab. Nacional de Metrologia das Radiacoes Ionizantes

    2015-07-01

    The {sup 123}I is widely used in radiodiagnostic procedures in nuclear medicine. According to Pharmacopoeia care should be taken during its production process, since radionuclidic impurities may be generated. The {sup 121}Te is an impurity that arises during the {sup 123}I production and determining their gamma emission probabilities (Pγ) is important in order to obtain more information about its decay. Activities were also obtained by absolute standardization using the sum-peak method and these values were compared to the efficiency curve method. (author)

  9. /sup 123m/Te-labeled biochemicals and method of preparation

    International Nuclear Information System (INIS)

    Knapp, F.

    1980-01-01

    A process for preparing a /sup 123m/Te-labeled organic compound of the formula R-/sup 123m/Te-CH 2 -R', R being alkyl, substituted alkyl, aryl or substituted aryl and R' being a steroidal side chain, alkyl amino acid or amino acid group, said process comprising the steps of: (A) reaching a /sup 123m/Te-symmetric diorgano ditelluride, R 2 /sup 123m/Te 2 , R being alkyl, substituted alkyl, aryl or substituted aryl, with a hydride reducing agent and a source of alkali metal ions to form an alkali metal organo telluride M-/sup 123m/Te-R; (B) reacting said alkali metal organo telluride with a primary halogenated organic compound R/sub a/'-X, R/sub a/' being a 17 alkyl steroid group having 1-4 carbon atoms in said alkyl group, an alkyl amino acid group, or a group hydrolyzable to an alkyl amino acid group

  10. Study of the /sup 58/Ni, /sup 90/Zr and /sup 208/Pb(p,d) reactions at 121 MeV. [DWBA, angular distributions, spectroscopic factors, finite range calculations

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, R E; Kraushaar, J J; Shepard, J R [Colorado Univ., Boulder (USA). Nuclear Physics Lab.; Comfort, J R [Indiana Univ., Bloomington (USA). Dept. of Physics

    1978-01-01

    The (p,d) reaction has been studied on /sup 58/Ni, /sup 90/Zr and /sup 208/Pb at 121 MeV in order to test the applicability of the usual DWBA methods to higher energy data. The calculations describe the angular distribution for the strongly excited low-lying states reasonably well when adiabatic-deuteron optical potentials are used. Some discrepancies in shape persist, however, and some values of the spectroscopic factors differ from lower energy data in spite of many variations in the calculations. By use of exact finite-range calculations a value of D/sup 2//sub 0/ = 1.23 x 10/sup 4/ MeV/sup 2/.fm/sup 3/ was found for use at 121 MeV. Deuteron D-state contributions were negligible at forward angles and two-step contributions do not appear more significant than for data at lower energy.

  11. Crystal structure, magnetism, {sup 89}Y solid state NMR, and {sup 121}Sb Moessbauer spectroscopic investigations of YIrSb

    Energy Technology Data Exchange (ETDEWEB)

    Benndorf, Christopher [Institut fuer Physikalische Chemie, Universitaet Muenster (Germany); Institut fuer Anorganische und Analytische Chemie, Universitaet Muenster (Germany); Heletta, Lukas; Block, Theresa; Poettgen, Rainer [Institut fuer Anorganische und Analytische Chemie, Universitaet Muenster (Germany); Eckert, Hellmut [Institut fuer Physikalische Chemie, Universitaet Muenster (Germany); Institute of Physics in Sao Carlos, University of Sao Paulo, Sao Carlos (Brazil)

    2017-02-15

    The ternary antimonide YIrSb was synthesized from the binary precursor YIr and elemental antimony by a diffusion controlled solid-state reaction. Single crystals were obtained by a flux technique with elemental bismuth as an inert solvent. The YIrSb structure (TiNiSi type, space group Pnma) was refined from single-crystal X-ray diffractometer data: a = 711.06(9), b = 447.74(5), c = 784.20(8) pm, wR{sub 2} = 0.0455, 535 F{sup 2} values, 20 variables. {sup 89}Y solid state MAS NMR and {sup 121}Sb Moessbauer spectra show single resonance lines in agreement with single-crystal X-ray data. YIrSb is a Pauli paramagnet. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  12. Evidence for B{sup ¯}{sub s}{sup 0}→Λ{sub c}{sup +}Λ{sup ¯}π{sup −}

    Energy Technology Data Exchange (ETDEWEB)

    Solovieva, E., E-mail: esolov@itep.ru [Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); Chistov, R. [Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); Adachi, I. [High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 (Japan); Asner, D.M. [Pacific Northwest National Laboratory, Richland, WA 99352 (United States); Aushev, T. [Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); Bakich, A.M. [School of Physics, University of Sydney, NSW 2006 (Australia); Bala, A. [Panjab University, Chandigarh 160014 (India); Bhardwaj, V. [Nara Women' s University, Nara 630-8506 (Japan); Bhuyan, B. [Indian Institute of Technology Guwahati, Assam 781039 (India); Bischofberger, M. [Nara Women' s University, Nara 630-8506 (Japan); Bondar, A. [Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090 (Russian Federation); Bonvicini, G. [Wayne State University, Detroit, MI 48202 (United States); Bozek, A. [H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342 (Poland); Bračko, M. [University of Maribor, 2000 Maribor (Slovenia); J. Stefan Institute, 1000 Ljubljana (Slovenia); Browder, T.E. [University of Hawaii, Honolulu, HI 96822 (United States); Chekelian, V. [Max-Planck-Institut für Physik, 80805 München (Germany); Chen, A. [National Central University, Chung-li 32054, Taiwan (China); Cheon, B.G. [Hanyang University, Seoul 133-791 (Korea, Republic of); Chilikin, K. [Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); Cho, K. [Korea Institute of Science and Technology Information, Daejeon 305-806 (Korea, Republic of); and others

    2013-10-07

    Using 121.4 fb{sup −1} of data collected with the Belle detector at the ϒ(5S) resonance at the KEKB asymmetric-energy e{sup +}e{sup −} collider, we report evidence for the B{sup ¯}{sub s}{sup 0}→Λ{sub c}{sup +}Λ{sup ¯}π{sup −} decay mode with a measured branching fraction (3.6±1.1[stat.]{sub −0.5}{sup +0.3}[syst.]±0.9[Λ{sub c}{sup +}]±0.7[N{sub B{sup ¯}{sub s{sup 0}}}])×10{sup −4} and a significance of 4.4 standard deviations. This is the first evidence for a baryonic B{sub s}{sup 0} decay.

  13. Development of a recovery method of {sup 131}I in the {sup 99}Mo process through the fission of 235{sup U}; Desenvolvimento de metodo de recuperacao de {sup 131}I no processo de producao de 99{sup M}o pela fissao de 2{sup 35}U

    Energy Technology Data Exchange (ETDEWEB)

    Bignardi, Aline Moraes Teixeira

    2013-07-01

    {sup 13}1{sup I} is an iodine radioisotope widely used in nuclear medicine that can be used either for diagnostic or for treatment due to its physical decay by {beta}{sup -} and its high emission of y-rays. It is produced at IPEN using the indirect reaction: {sup 130}Te(n,y){sup 131m}Te {yields} {sup 131}Te {yields} {sup 131}I where TeO{sub 2} targets are irradiated in a Nuclear Reactor. There is also the possibility of producing {sup 131}I by the fission of {sup 235}U, where about 300 different elements are produced together with {sup 131}I. The {sup 131}I produced through this method presents high specific activity and radioactive concentration suitable for the labeling of molecules. The aim of this work was to develop a recovery method of {sup 131}I with the required quality to be used in Nuclear Medicine in the {sup 99}Mo production process through the route of acid dissolution of metallic {sup 235}U targets. {sup 131}I can appear in two phases of the process, both in the gaseous phase produced during the dissolution of metallic U targets and in the dissolution solution. This work studied the recovery of {sup 131}I in these two phases. Several materials were used for the capture and recovery of {sup 131}I at the two phases of the process, the gaseous one and the solution of dissolution of U targets. Columns of alumina with Cu, acid alumina with Cu, Ag microspheres, Cu microspheres, Ag nanospheres, anionic cartridges, Ag cartridges, anion exchange resin and activated charcoal columns were tested. Solutions containing {sup 131}I in 0.1 mol.L{sup -1} NaOH were percolated through the materials and the eluted solutions were analyzed in a dose calibrator. The precipitation of AgI was also studied wth further dissolution of this precipitate with 0.1 mol L{sup -1} NH{sub 4}OH and 5% Na{sub 2}S{sub 2}O{sub 3}. The recovery results varied according to the material, activated charcoal showed recovery yields between 42% and 83% but the recovery yield of the alumina column

  14. Ab-initio study of pure sup 7 sup 7 Se and sup 1 sup 2 sup 5 Te systems and of the sup 7 sup 7 Se nuclear quadrupole interaction in tellurium

    CERN Document Server

    Oh, Y K; Cho, H S

    1999-01-01

    Using the Hartree-Fock cluster procedure, we have studied the electric-field gradient tensors at the nuclear sites of sup 7 sup 7 Se and sup 1 sup 2 sup 5 Te in pure sup 1 sup 2 sup 5 Te systems and in tellurium crystalline system's with a sup 7 sup 7 Se impurity. From the results for the pure systems, sup 7 sup 7 Se in selenium and sup 1 sup 2 sup 5 Te in tellurium, using the observed quadrupole moments: Q( sup 7 sup 7 Se) 0.75 +- 0.07 barns and Q( sup 1 sup 2 sup 5 Te) = 0.35 +- 0.04 barns. Comparison is made with earlier values obtained by different methods. Using our calculated values of Q and the results of a study of the field-gradient tensors for sup 7 sup 7 Se in tellurium, the theoretical values of the quadrupole coupling constants are found to agree, within about 7 percent, with experiment. The calculated asymmetry parameters are also found to be in reasonable agreement with the experiment values, although the agreement not as close as in the case of the quadrupole -coupling constants. Directions fo...

  15. Proton induced nuclear reactions on natural antimony up to 17 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Elbinawi, Alaa; Al-abyad, Mogahed; Hassan, Khaled F. [Atomic Energy Authority, Cairo (Egypt). Cyclotron Facility; Abd-Elmageed, Karima E. [Benha Univ. (Egypt). Dept. of Physics; Ditroi, Ferenc [Hungarian Academy of Sciences, Debrecen (Hungary). Inst. for Nuclear Research (ATOMKI)

    2016-08-01

    The activation cross sections of proton induced reactions on {sup nat}Sb target leading to the formation of the radioisotopes {sup 121m,g,123m}Te were measured. The experimental excitation functions were compared with the theoretical model calculations using the codes EMPIRE-3.1 and TALYS-1.4. The integral yields of the three radionuclides were calculated and the possibility of their production is discussed.

  16. Studies of light charged particle emission from fission and ER reactions in the system 344 MeV {sup 28}Si+{sup 121}Sb{yields}{sup 149}Tb (E{sup *}=240 MeV)

    Energy Technology Data Exchange (ETDEWEB)

    Kaplan, Morton E-mail: kaplan@cmchem.chem.cmu.edu; Copi, Craig J.; DeYoung, Paul A.; Gilfoyle, G.J.; Karol, Paul J.; Moses, David J.; Parker, W.E.; Rehm, K. Ernst; Sarafa, John; Vardaci, Emanuele

    2001-04-09

    Light charged particles (LCP) have been measured for the reaction 344 MeV {sup 28}Si+{sup 121}Sb in singles and in coincidence with evaporation residues (ER), fusion-fission fragments (FF), and other LCP. A major feature of this experiment was the use of a gas-filled magnetic spectrometer in the forward direction to separate ER from the much more abundant yield of elastically scattered projectiles and projectile-like fragments. The dominant sources of evaporative {sup 1}H and {sup 4}He emission are the ER (approximately 75%), with the remainder being largely associated with fission reactions. For these latter reactions, most of the {sup 1}H and {sup 4}He can be well accounted for by evaporation from the composite system prior to fission and by evaporation from the postfission fragments. LCP emission cross sections were determined for each identified source, and a comparison has been made to previous studies. From this comparison, indications were found for significant entrance channel effects, with the more asymmetric channels exhibiting much larger LCP cross sections. Statistical model predictions for ER emissions are in good agreement with observed LCP energy spectra, angular distributions, and integrated inclusive and exclusive cross sections, with all calculations using the same unique set of model parameters. This result contrasts strongly with recent reports for light mass systems, where model calculations were unable to simultaneously reproduce all observables.

  17. On-line I{sup −}/Te{sup −} separation for the AMS analysis of {sup 125}I

    Energy Technology Data Exchange (ETDEWEB)

    Charles, C.R.J., E-mail: christopher.charles@uottawa.ca [Andre E. Lalonde Accelerator Mass Spectrometry Laboratory, Advanced Research Complex, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5 (Canada); Cornett, R.J.; Zhao, X.-L. [Andre E. Lalonde Accelerator Mass Spectrometry Laboratory, Advanced Research Complex, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5 (Canada); Litherland, A.E. [IsoTrace Laboratory, Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7 (Canada); Kieser, W.E. [Andre E. Lalonde Accelerator Mass Spectrometry Laboratory, Advanced Research Complex, University of Ottawa, 25 Templeton Street, Ottawa, ON K1N 6N5 (Canada)

    2015-10-15

    The isobar separator for anions (ISA) was used together with a 3 MV tandem accelerator mass spectrometer (AMS) to demonstrate the real time (on-line) separation of Te{sup −} from I{sup −}. Following the ion source mass spectrometry and major retardation to tens of eV, the ISA uses a radiofrequency quadrupole (RFQ) ion guide to confine and direct I{sup −} and associated Te{sup −} isobar anions through a gas-reaction cell, where chemical reactions occur at eV energies with the electronegative gas NO{sub 2}. Anions are subsequently reaccelerated out of the ISA to near original ion source extraction energies for AMS analysis. At 5 mTorr NO{sub 2} in the ISA gas-reaction cell, {sup 125}Te{sup −} was observed to be attenuated by a factor of ∼10{sup 7} as compared to {sup 127}I{sup −} that did not experience significant (<50%) losses. A comparative test using {sup 37}Cl{sup −} and {sup 32}S{sup −} (having similar chemical properties to iodine and tellurium) showed a {sup 32}S{sup −} attenuation of >10{sup 7} relative to {sup 37}Cl{sup −} under the same ISA–AMS conditions. The preferential destruction of Te{sup −} (and S{sup −}) at eV energies in the ISA is likely due to a larger favorable destruction cross-section with NO{sub 2}. This study is the first demonstration of I–Te anion separation for AMS, and makes possible the use of {sup 125}I, free of the contaminant {sup 125}Te isobar after suitable sample purification, for future {sup 129}I/{sup 125}I carrier-free analyses of natural samples at ultra-low trace levels.

  18. De Forsømte

    DEFF Research Database (Denmark)

    Larsen, Troels

    til hinanden. Er en konkret analyse af relationerne mellem det symbolske rum, det sociale rum og det fysiske rum med udgangspunkt i 35 forsømte boligområder.   Andet nedslag: Beboernes sociale differentieringer i de forsømte boligområder  Med udgangspunkt i Bourdieus model om de væsentligste...

  19. Maximum Likelihood Learning of Conditional MTE Distributions

    DEFF Research Database (Denmark)

    Langseth, Helge; Nielsen, Thomas Dyhre; Rumí, Rafael

    2009-01-01

    We describe a procedure for inducing conditional densities within the mixtures of truncated exponentials (MTE) framework. We analyse possible conditional MTE specifications and propose a model selection scheme, based on the BIC score, for partitioning the domain of the conditioning variables....... Finally, experimental results demonstrate the applicability of the learning procedure as well as the expressive power of the conditional MTE distribution....

  20. Measurement of B(B<sup>+>→ J/Ψ π<sup>+)/B(B+> → J/Ψ K<sup>+>) at the collider detector at Fermilab

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Jaison [Sungkyunkwan Univ., Suwon (Republic of Korea)

    2005-01-01

    This thesis reports on a measurement of the ratio of braching frac t ions, B(B<sup>+>→ J/Ψ π<sup>+)/B(B+> → J/Ψ K<sup>+>) , where J/Ψ → μ<sup>+μ-> . The data were collected by the Collider Detector at Fermilab between February 2002 and August 2003 and corresponds to an integrated luminosity of 220 pb<sup>- 1sup> in p$\\bar{p}$ collisions at √s = l.96 TeV. We determine the ratio of branching fractions.

  1. Gamma - Gamma angular correlations in the decay of Sb<sup>124sup> (93 sec) and Sb<sup>128sup> (10.8 min)

    Energy Technology Data Exchange (ETDEWEB)

    Vervier, J.; Binon, F.; del Marmol, P.

    1963-10-15

    The decay of Sb<sup>124sup> and Sb<sup>128sup> to Te>124sup> and Te>128sup>, respectively, that involve two γ-ray triple cascades was investigated. Angular correlations were measured for these two triple cascades in order to confirm a spin 4 value for the 1.248-keV level in Te>124sup> and the 1.508-keV level in Te>128sup> and to obtain the spin of the 1.753-keV level in Te>124sup> and the 1.828-keV level in Te>128sup>. (C.E.S.)

  2. Structure of 2{sub 1,2}{sup +} states in {sup 132,134,136}Te

    Energy Technology Data Exchange (ETDEWEB)

    Severyukhin, A. P., E-mail: sever@theor.jinr.ru; Arsenyev, N. N. [Joint Institute for Nuclear Research, Bogoliubov Laboratory of Theoretical Physics (Russian Federation); Pietralla, N.; Werner, V. [Technische Universität Darmstadt, Institut für Kernphysik (Germany)

    2016-07-15

    Starting fromthe Skyrme interaction f- together with the volume pairing interaction, we study the g factors for the 2{sub 1,2}{sup +} excitations of {sup 132,134,136}Te. The coupling between one- and two-phonon terms in the wave functions of excited states is taken into account within the finite-rank separable approximation. Using the same set of parameters we describe the available experimental data and give the prediction for {sup 136}Te, g(2{sub 1}{sup +}) = −0.18 in comparison to +0.32 in the case of {sup 132}Te.

  3. Search for D{sub (s)}{sup +}→π{sup +}μ{sup +}μ{sup −} and D{sub (s)}{sup +}→π{sup −}μ{sup +}μ{sup +} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2013-07-23

    A search for non-resonant D{sub (s)}{sup +}→π{sup +}μ{sup +}μ{sup −} and D{sub (s)}{sup +}→π{sup −}μ{sup +}μ{sup +} decays is performed using proton–proton collision data, corresponding to an integrated luminosity of 1.0 fb{sup −1}, at √(s)=7TeV recorded by the LHCb experiment in 2011. No signals are observed and the 90% (95%) confidence level (CL) limits on the branching fractions are found to be B(D{sup +}→π{sup +}μ{sup +}μ{sup −})<7.3(8.3)×10{sup −8}, B(D{sub s}{sup +}→π{sup +}μ{sup +}μ{sup −})<4.1(4.8)×10{sup −7}, B(D{sup +}→π{sup −}μ{sup +}μ{sup +})<2.2(2.5)×10{sup −8}, B(D{sub s}{sup +}→π{sup −}μ{sup +}μ{sup +})<1.2(1.4)×10{sup −7}. These limits are the most stringent to date.

  4. Branching fraction and CP asymmetry of the decays B{sup +}→K{sub S}{sup 0}π{sup +} and B{sup +}→K{sub S}{sup 0}K{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2013-11-04

    An analysis of B{sup +}→K{sub S}{sup 0}π{sup +} and B{sup +}→K{sub S}{sup 0}K{sup +} decays is performed with the LHCb experiment. The pp collision data used correspond to integrated luminosities of 1 fb{sup −1} and 2 fb{sup −1} collected at centre-of-mass energies of √(s)=7 TeV and √(s)=8 TeV, respectively. The ratio of branching fractions and the direct CP asymmetries are measured to be B(B{sup +}→K{sub S}{sup 0}K{sup +})/B(B{sup +}→K{sub S}{sup 0}π{sup +})=0.064±0.009 (stat.)±0.004 (syst.), A{sup CP}(B{sup +}→K{sub S}{sup 0}π{sup +})=−0.022±0.025 (stat.)±0.010 (syst.) and A{sup CP}(B{sup +}→K{sub S}{sup 0}K{sup +})=−0.21±0.14 (stat.)±0.01 (syst.). The data sample taken at √(s)=7 TeV is used to search for B{sub c}{sup +}→K{sub S}{sup 0}K{sup +} decays and results in the upper limit (f{sub c}⋅B(B{sub c}{sup +}→K{sub S}{sup 0}K{sup +}))/(f{sub u}⋅B(B{sup +}→K{sub S}{sup 0}π{sup +}))<5.8×10{sup −2} at 90% confidence level, where f{sub c} and f{sub u} denote the hadronisation fractions of a b{sup ¯} quark into a B{sub c}{sup +} or a B{sup +} meson, respectively.

  5. Half-life of the 3/2/sup +/ level of /sup 119/Sn

    Energy Technology Data Exchange (ETDEWEB)

    Abreu, M C; Gil, F B [Faculdade de Ciencias da Universidade de Lisboa, Lisbon (Portugal). Grupo de Espectroscopia Nuclear, Laboratorio de Fisica

    1976-01-01

    The half-life of the 3/2/sup +/, 23.87 keV level of /sup 119/Sn is measured by the delayed coincidence technique. Magnetic spectrometry associated with scintillation techniques and scintillation spectrometry only have been used. The results obtained with these techniques were respectively Tsub(1/2) = 17.87 +- 0.11 ns and Tsub(1/2) = 18.48 +- 0.30 ns. The measured reduced M1 transition probability is compared with the single-particle and Kisslinger and Sorensen model predictions.

  6. Internal conversion coefficients of M4 isomeric transitions in /sup 125/ /sup 127/ /sup 129/Te decay

    Energy Technology Data Exchange (ETDEWEB)

    Soni, S K; Kumar, A; Gupta, S L; Pancholi, S C [Delhi Univ. (India). Dept. of Physics and Astrophysics

    1977-01-01

    The internal conversion coefficients have been measured using a high resolution low energy Ge(Li) detector for the following M4 transitions: /sup 125/Te: 109.27 keV transition ..cap alpha..sub(T) = 357 +- 11; RG method, /sup 127/Te: 88,26 keV transition ..cap alpha..sub(K) = 484 +- 23; XPG method, /sup 129/Te: 105.50 keV transition ..cap alpha..sub(K) = 213 +- 10; XPG method. It is observed that these values are lower by 2.5-3.6% as compared with Hager and Seltzer's calculations. A comparison between experimental and theoretical ..cap alpha..sub(K) and ..cap alpha..sub(T) values for eleven M4 transitions shows that the experimental values are systematically lower.

  7. Search for the rare decays B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -} and B{sup 0}{yields}{mu}{sup +}{mu}{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); Archilli, F. [Laboratori Nazionali dell' INFN di Frascati, Frascati (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Arrabito, L. [CC-IN2P3, CNRS/IN2P3, Lyon-Villeurbanne (France); and others

    2012-02-14

    A search for the decays B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -} and B{sup 0}{yields}{mu}{sup +}{mu}{sup -} is performed with 0.37 fb{sup -1} of pp collisions at {radical}(s)=7 TeV collected by the LHCb experiment in 2011. The upper limits on the branching fractions are B(B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -})<1.6 Multiplication-Sign 10{sup -8} and B(B{sup 0}{yields}{mu}{sup +}{mu}{sup -})<3.6 Multiplication-Sign 10{sup -9} at 95% confidence level. A combination of these results with the LHCb limits obtained with the 2010 dataset leads to B(B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -})<1.4 Multiplication-Sign 10{sup -8} and B(B{sup 0}{yields}{mu}{sup +}{mu}{sup -})<3.2 Multiplication-Sign 10{sup -9} at 95% confidence level.

  8. Search for the decay D{sup 0}→π{sup +}π{sup −}μ{sup +}μ{sup −}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2014-01-20

    A search for the D{sup 0}→π{sup +}π{sup −}μ{sup +}μ{sup −} decay, where the muon pair does not originate from a resonance, is performed using proton–proton collision data corresponding to an integrated luminosity of 1.0fb{sup −1} recorded by the LHCb experiment at a centre-of-mass energy of 7 TeV. No signal is observed and an upper limit on the relative branching fraction with respect to the resonant decay mode D{sup 0}→π{sup +}π{sup −}ϕ(→μ{sup +}μ{sup −}), under the assumption of a phase-space model, is found to be B(D{sup 0}→π{sup +}π{sup −}μ{sup +}μ{sup −})/B(D{sup 0}→π{sup +}π{sup −}ϕ(→μ{sup +}μ{sup −}))<0.96 at 90% confidence level. The upper limit on the absolute branching fraction is evaluated to be B(D{sup 0}→π{sup +}π{sup −}μ{sup +}μ{sup −})<5.5×10{sup −7} at 90% confidence level. This is the most stringent to date.

  9. Mixed phase in cubic and hexagonal HoMn{sub 2} {sup 111}Cd PAC and {sup 119}Sn, {sup 57}Fe Moessbauer studies

    Energy Technology Data Exchange (ETDEWEB)

    Cottenier, S.; Meersschaut, J.; Demuynck, S.; Swinnen, B.; Rots, M. [Leuven Univ. (Belgium). Inst. voor Kern- en Stralingsfysika; Krop, K.; Marzec, J.; Zukrowski, J.; Przewoznik, J.; Japa, E. [Dept. of Solid State Physics, Univ. of Mining and Metallurgy, Krakow (Poland)

    1998-01-01

    Hyperfine parameters on {sup 57}Fe, {sup 119}Sn and {sup 111}Cd substituted into the Mn sublattice were measured by Moessbauer and PAC spectroscopies. From these results it is tentatively concluded that C15 and C14 HoMn{sub 2} are mixed-phase compounds. In C14 HoMn{sub 2} there is no (or small) moment on the 2a site. (orig.) 6 refs.

  10. CP violation in D{sup 0} {yields}(K{sup -}K{sup +},{pi}{sup -}{pi}{sup +}) from diquarks

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Chuan-Hung [National Cheng Kung Univ., Tainan (China). Dept. of Physics; National Center for Theoretical Sciences, Hsinchu (China); Geng, Chao-Quiang [National Center for Theoretical Sciences, Hsinchu (China); National Tsing Hua Univ., Hsinchu (China). Dept. of Physics; Wang, Wei [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2012-02-15

    The explanation of the large CP asymmetries in D{sup 0}{yields}({pi}{sup +}{pi}{sup -},K{sup +}K{sup -}) decays observed by the LHCb collaboration is likely to call for new physics beyond the CKM paradigm. We explore new contributions caused by the color-sextet scalar diquark, and demonstrate that the diquark with the mass of order 1 TeV and nominal couplings with quarks can generate the CP asymmetries at the percent level. Using the experimental data on branching ratios and CP asymmetries of D{sup 0}{yields}({pi}{sup +}{pi}{sup -},K{sup +}K{sup -}), we derive the constraints on the diquark mass and couplings, which can be further examined on hadron colliders in the dijet final states. (orig.)

  11. Model-independent search for CP violation in D{sup 0}→K{sup −}K{sup +}π{sup −}π{sup +} and D{sup 0}→π{sup −}π{sup +}π{sup +}π{sup −} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universit ät Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2013-11-04

    A search for CP violation in the phase-space structures of D{sup 0} and D{sup ¯0} decays to the final states K{sup −}K{sup +}π{sup −}π{sup +} and π{sup −}π{sup +}π{sup +}π{sup −} is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb{sup −1} collected in 2011 by the LHCb experiment in pp collisions at a centre-of-mass energy of 7 TeV. For the K{sup −}K{sup +}π{sup −}π{sup +} final state, the four-body phase space is divided into 32 bins, each bin with approximately 1800 decays. The p-value under the hypothesis of no CP violation is 9.1%, and in no bin is a CP asymmetry greater than 6.5% observed. The phase space of the π{sup −}π{sup +}π{sup +}π{sup −} final state is partitioned into 128 bins, each bin with approximately 2500 decays. The p-value under the hypothesis of no CP violation is 41%, and in no bin is a CP asymmetry greater than 5.5% observed. All results are consistent with the hypothesis of no CP violation at the current sensitivity.

  12. Magnetism of DyMn{sub 2} and HoMn{sub 2} - {sup 57}Fe and {sup 119}Sn Moessbauer studies

    Energy Technology Data Exchange (ETDEWEB)

    Krop, K. [University of Min. and Metall., Krakow (Poland). Dept. of Solid State Phys.; Zukrowski, J. [University of Min. and Metall., Krakow (Poland). Dept. of Solid State Phys.; Przewoznik, J. [University of Min. and Metall., Krakow (Poland). Dept. of Solid State Phys.; Marzec, J. [University of Min. and Metall., Krakow (Poland). Dept. of Solid State Phys.; Wiesinger, G. [Institute for Experimental Physics, Technical University, Wiedner Hauptstrasse 8-10, A-1040 Vienna (Austria); Haeufler, T. [Institute for Experimental Physics, Technical University, Wiedner Hauptstrasse 8-10, A-1040 Vienna (Austria); Hilscher, G. [Institute for Experimental Physics, Technical University, Wiedner Hauptstrasse 8-10, A-1040 Vienna (Austria); Steiner, W. [Institute for Applied and Technical Physics, Technical University, Wiedner Hauptstrasse 8-10, A-1040 Vienna (Austria)

    1995-05-01

    Moessbauer spectra were measured for two Laves phase compounds DyMn{sub 2} and HoMn{sub 2} in which manganese was substituted to 0.5% with {sup 57}Fe and to 0.2% with {sup 119}Sn. At 4.2 K the {sup 57}Fe and {sup 119}Sn spectra of the Dy compound were unambiguously fitted each with two Zeeman patterns (with relative contributions to the spectra 3:1) corresponding to two different Mn sites - magnetic and nonmagnetic. Transferred hyperfine fields at {sup 119}Sn were found to be proportional to the magnetic moment of Dy and its ferromagnetic component, corroborating the magnetic structure found in neutron diffraction (ND) experiment. The same procedure was carried on with the spectra measured for the Ho compound, but the above mentioned proportionality was not found. ((orig.)).

  13. Search for doubly-charged Higgs Boson production in the decay H<sup>++> H<sup>--> → μ<sup>+μ+μ-μ-> with the D0 detector at √s = 1.96-TeV

    Energy Technology Data Exchange (ETDEWEB)

    Zdrazil, Marian [Stony Brook Univ., NY (United States)

    2004-08-01

    This work presents a search for the pair production of doubly-charged Higgs Bosons in the process p$\\bar{p}$ → H<sup>++H--> → μ<sup>+μ+μ-μ-> using inclusive dimuon events. These data correspond to an integrated luminosity of about 113 pb 1 and were recorded by the D0 experiment between August 2002 and June 2003. In the absence of a signal, 95% confidence level mass limits of M(H$±±\\atop{L}$) > 118.6 GeV/c<sup>2sup> and M(HR<sup>±±>) > 98.1 GeV/c<sup>2sup> are set for left-handed and right-handed doubly-charged Higgs boson, assuming 100% branching into muons and hypercharge |Y| = 2 and Yukawa coupling h μμ > 10<sup>-7sup>. This is the first search for doubly-charged Higgs bosons at hadron colliders. It significantly extends the previous mass limit of 100.5 GeV/c<sup>2sup> for a left-handed doubly-charged Higgs boson measured in the muon final states by the OPAL collaboration.

  14. Effective lifetime measurements in the B{sub s}{sup 0}→K{sup +}K{sup −}, B{sup 0}→K{sup +}π{sup −} and B{sub s}{sup 0}→π{sup +}K{sup −} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); An, L. [Center for High Energy Physics, Tsinghua University, Beijing (China); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andreotti, M. [Sezione INFN di Ferrara, Ferrara (Italy); and others

    2014-09-07

    Measurements of the effective lifetimes in the B{sub s}{sup 0}→K{sup +}K{sup −}, B{sup 0}→K{sup +}π{sup −} and B{sub s}{sup 0}→π{sup +}K{sup −} decays are presented using 1.0 fb{sup −1} of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes are τ{sub B{sub s{sup 0}→K{sup +}K{sup −}}}=1.407±0.016(stat)±0.007(syst) ps, τ{sub B{sup 0}→K{sup +}π{sup −}}=1.524±0.011(stat)±0.004(syst) ps, τ{sub B{sub s{sup 0}→π{sup +}K{sup −}}}=1.60±0.06(stat)±0.01(syst) ps. This is the most precise determination to date of the effective lifetime in the B{sub s}{sup 0}→K{sup +}K{sup −} decay and provides constraints on contributions from physics beyond the Standard Model to the B{sub s}{sup 0} mixing phase and the width difference ΔΓ{sub s}.

  15. Nuclear parameters determination of the {sup 127}Te {beta} {sup -} decay: a proposal for teaching nuclear physics; Determinacao de parametros nucleares do nucleo de {sup 127}Te: uma proposta para o ensino de fisica nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Batista, Wagner Fonseca

    2011-07-01

    A study of the {sup 127}Te {beta}{sup -} decay was carried out by means of gamma spectroscopy measurements using high resolution HPGe detector, in the region from 30 keV to 1.0 MeV, aiming to get a better understanding of the {sup 127}Te nuclear structure. The radioactive sources of {sup 12}7Te were obtained from the {sup 126}Te(n,{gamma}){sup 1}'2{sup 7}Te nuclear reaction produced in the IEA- R1 nuclear reactor at IPEN/CNEN-SP. Five gamma {sup t}ransitions previously attributed to this decay were confirmed with a better precision than previously. The half-life of {sup 127}Te was also studied resulting in data with lower uncertainty. Using a set of data selected from gamma spectroscopy measurements was developed and applied a didactic proposal for high school students using the Excel software. (author)

  16. Search for CP violation in the decay D{sup +}→π{sup −}π{sup +}π{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andreotti, M. [Sezione INFN di Ferrara, Ferrara (Italy); and others

    2014-01-20

    A search for CP violation in the phase space of the decay D{sup +}→π{sup −}π{sup +}π{sup +} is reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb{sup −1}, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. The Dalitz plot distributions for 3.1×10{sup 6}D{sup +} and D{sup −} candidates are compared with binned and unbinned model-independent techniques. No evidence for CP violation is found.

  17. Simulation free measurement of the B<sup>+> → $\\bar{D}$<sup>0sup>π+> lifetime using decays selected using displaced tracks

    Energy Technology Data Exchange (ETDEWEB)

    Malde, Sneha [St. Anne' s College, Oxford (United Kingdom)

    2008-01-01

    The lifetime of the B<sup>±> meson is measured using the decay channel B<sup>+> → $\\bar{D}$<sup>0sup>π+>. The measurement is made using approximately 1.0 fb<sup>-1sup> of Tevatron proton-anti-proton collision data at √s = 1.96 TeV collected by the CDF detector. The data were collected using impact parameter based triggers that were designed to select events with a secondary vertex. The trigger selection criteria result in data rich in a variety of B hadron decays, but intrinsically bias the lifetime distribution of the collected signal events. The traditional way to compensate for the bias is to use information from simulation. Presented here is a new method for correction of the lifetime bias using an analytical technique that uses information from the data only. This eliminates measurement uncertainty due to data and simulation agreement, ultimately resulting in a smaller systematic measurement uncertainty. The B<sup>±> lifetime measurement is the first measurement using this new technique and demonstrates its potential for use in future measurements. The B<sup>±> lifetime is measured to be τ(B<sup>±>) = 1.662 ± 0.023(stat) ± 0.015(syst)ps.

  18. A study of 3π production in γp → n<sup>-π+π+π-> and γ-p → Δ<sup>++π+π-π-> with CLAS at Jefferson Lab ->n

    Energy Technology Data Exchange (ETDEWEB)

    Tsaris, Aristedis [Florida Intl Univ., Miami, FL (United States)

    2016-02-22

    Apart from the mesons that the constituent quark model predicts, QCD allows for additional states beyond the qq system. Previous experiments have performed partial wave analysis on pion-production data and claim observation of an exotic J<sup>PC> = 1<sup>-+> state decaying via p-π. The g12 experiment took place at Jefferson Lab using the CLAS spectrometer, a liquid hydrogen target was used and a tagged photon beam. By studying the reactions γp → n<sup>-π+π+π-> and γp → Δ<sup>++π+π-π->, the photoproduction of mesons decaying to 3-pi was studied using two different but complimentary channels. Events are selected with low four-momentum transfer to the baryon, in order to enhance one pion exchange production. For both 3-pi systems the data exhibit two intermediate decays, p-pi and f2π. For the γp → n<sup>-π+π+π-> reaction over 600k events were acquired resulting in the largest 3 photoproduction dataset to date. The exotic J<sup>PC> = 1<sup>-+> partial wave does not show resonant behavior and more so it is strongly consistent with a non-resonant non-interfering wave relative to a resonant π2(1670). Furthermore, the partial wave analysis shows production of the a2(1320) and π2(1670) mesons. For the first time we report observation of a photoproduced a1(1260) meson. For the γp → Δ<sup>++π+π-π-> reaction nearly 350k events were analyzed. A partial wave analysis was performed for the first time on this channel. The a1(1260), a2(1320), and the 2(1670) mesons were observed. Observation of the a1(1260) confirms the result first reported in γp → n<sup>-π+π+π-> reaction.

  19. Measurement of the branching ratio for the doubly cabibbo suppressed decay D+ → <sup>+> K<sup>-K+K+>; Medida da razao de ramificacao do Decaimento D<sup>+> → <sup>+> K<sup>-K+K+> duplamente suprimido por cabibbo

    Energy Technology Data Exchange (ETDEWEB)

    Silva Carvalho, Hendly da [Brazilian Centre for Physics Research (CBPF), Rio de Janeiro (Brazil).

    1997-07-01

    In this thesis, we performed a study for the decay modes D<sup>+> → <sup>+> K<sup>-K+K+> and D<sup>+>s → <sup>+> K<sup>-K+K+>, using the data collected by the E791, a hadroproduction of charm experiment at Fermilab. The D<sup>+> → <sup>+> K<sup>-K+K+> decay is doubly Cabibbo suppressed while the D<sup>+>s → <sup>+> K<sup>-K+K+> decay is singly Cabibbo suppressed. We found 11.6 +- 3.9 events in the D<sup>+> mass region and 8.9 +- 3.3 in the D<sup>+>s mass region. The D<sup>+> → <sup>+> K<sup>-K+K+> branching ratio is measured to be (3.7 +- 1.3 +- 0.6) x 10<sup>-4sup> while the D<sup>+> → <sup>+> K<sup>-K+K+> branching ratio relative to D<sup>+>s → <sup>+> K<sup>-K+K+> is measured to be (4.2 +- 1.5 +- 0.6) x 10<sup>-2sup>.

  20. First observation of the decay B{sup Macron }{sub s}{sup 0}{yields}D{sup 0}K{sup Low-Asterisk 0} and a measurement of the ratio of branching fractions (B(B{sup Macron }{sub s}{sup 0}{yields}D{sup 0}K{sup Low-Asterisk 0}))/(B(B{sup Macron 0}{yields}D{sup 0}{rho}{sup 0}))

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); Archilli, F. [Laboratori Nazionali dell' INFN di Frascati, Frascati (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Arrabito, L. [CC-IN2P3, CNRS/IN2P3, Lyon-Villeurbanne (France); and others

    2011-11-30

    The first observation of the decay B{sup Macron }{sub s}{sup 0}{yields}D{sup 0}K{sup Low-Asterisk 0} using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb{sup -1}, is reported. A signal of 34.4{+-}6.8 events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The B{sup Macron }{sub s}{sup 0}{yields}D{sup 0}K{sup Low-Asterisk 0} branching fraction is measured relative to that of B{sup Macron 0}{yields}D{sup 0}{rho}{sup 0}: (B(B{sup Macron }{sub s}{sup 0}{yields}D{sup 0}K{sup Low-Asterisk 0}))/(B(B{sup Macron 0}{yields}D{sup 0}{rho}{sup 0})) =1.48{+-}0.34{+-}0.15{+-}0.12, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B{sup 0} and B{sub s}{sup 0} hadronisation fractions.

  1. Study of charmonium resonances in the γγ -> K<sup>0sup>SK±> π<sup>∓>i- and γγ -> K<sup>+> K<sup>-π+π-π>0sup> processes

    Energy Technology Data Exchange (ETDEWEB)

    Biassoni, Pietro [Univ. of Milan (Italy)

    2011-01-01

    This thesis reports the analysis of the e<sup>+e-> → e<sup>+e-KS>0sup>K±π±> and e<sup>+e-> → e<sup>+e-K+K-π+π-π>0sup> processes using the final dataset of the BABAR experiment located at the SLAC National Accelerator Laboratory. From previous measurements, the KS<sup>0sup>K±π±> final state is known to show a clear signal from the βc(2S) particle. This c$\\bar{c}$ state escaped detection for almost twenty years and its properties are still not well established on the experimental ground, while accurate predictions exist on the theoretical side. The e<sup>+e->→ e<sup>+e-K+K-π+π-π>0sup> process is first studied in this thesis. An accurate determination of the βc(2S) properties is obtained in the KS<sup>0sup>K±π±> decay mode. We also report the first observation of ηc(2S) and other charmonium states to the K<sup>+K-π+π-π>0sup> final state. The results of this thesis have been published in Physical Review D, and will be useful to test theoretical models describing the charmonium system. The thesis is organized in four chapters. The first one gives a brief introduction of the theoretical models used to describe the charmonium system. The second one discuss the current status of conventional and exotic charmonium spectroscopy, reporting recent experimental results and their interpretation. The third Chapter is devoted to describe the BABAR experiment. The analysis technique and results are described in Chapter 4. Finally, conclusions from this analysis are drawn.

  2. Measurement of the Λ<sup>0sup>b lifetime in Λ<sup>0sup>b → Λ<sup>+cπ-> decays at the Collider Detector at Fermilab

    Energy Technology Data Exchange (ETDEWEB)

    Mumford, Jonathan Reid [Johns Hopkins Univ., Baltimore, MD (United States)

    2008-09-01

    The lifetime of the Λ<sup>0sup>b baryon (consisting of u, d and b quarks) is the theoretically most interesting of all b-hadron lifetimes. The lifetime of Λ<sup>0sup>b probes our understanding of how baryons with one heavy quark are put together and how they decay. Experimentally however, measurements of the Λ<sup>0sup>b lifetime have either lacked precision or have been inconsistent with one another. This thesis describes the measurement of Λ<sup>0sup>b lifetime in proton-antiproton collisions with center of mass energy of 1.96 TeV at Fermilab's Tevatron collider. Using 1070 ± 60pb<sup>-1sup> of data collected by the Collider Detector at Fermilab (CDF), a clean sample of about 3,000 fully-reconstructed Λ<sup>0sup>b →Λc<sup>+π-> decays (with Λ<sup>+>c subsequently decaying via Λ<sup>+>c → p<sup>+> K<sup>-> π<sup>+>) is used to extract the lifetime of the Λ<sup>0sup>b baryon, which is found to be cτ(Λ<sup>0sup>b) = 422.8 ± 13.8(stat) ± 8.8(syst)μm. This is the most precise measurement of its kind, and is even better than the current world average. It also settles the recent controversy regarding the apparent inconsistency between CDF's other measurement and the rest of the world.

  3. Measurement of direct CP violation in b → sc$\\bar{c}$ and b → d$\\barc{c}$ quark transitions using B<sup>+> → J/psiK<sup>+> and B<sup>+>→ J/Ψπ<sup>+> decays

    Energy Technology Data Exchange (ETDEWEB)

    Holubyev, Kostyantyn [Lancaster Univ. (United Kingdom)

    2008-11-01

    This thesis describes the measurement of the direct CP violation in the b → sc$\\bar{c}$ transition using the decay B<sup>+> → J/ΨK<sup>+>, and in the b → dc$\\bar{c}$ transition using the decay B<sup>+> → J/Ψπ<sup>+>. The decays of B<sup>+> mesons are reconstructed in approximately 2.8 fb<sup>-1sup> of data recorded by D0 detector in 2002-2007 during Run II of Fermilab Tevatron collider. Using the unbinned likelihood fit, a signal of 40,222 {+-} 242 of B<sup>+> → J/ΨK<sup>+> and 1,578 ± 119 of B<sup>+> → J/Ψπ<sup>+> events is obtained. The corresponding direct CP violation asymmetries are measured to be ACP(B<sup>+> → J/Ψ(1S)K<sup>+>) = +0.0077 ± 0.0061(stat.) ± 0.0027(syst.), and ACP(B<sup>+> → J/Ψ(1S)π<sup>+>) = - 0.089 ± 0.081(stat.) ± 0.028(syst.). The result on ACP (B<sup>+> → J/Ψ(1S)K<sup>+>) is consistent with the 2007 world average and is the most precise measurement of this asymmetry, with uncertainty approaching the level of the Standard Model prediction. The result on ACP (B<sup>+> → J/Ψ(1S)π<sup>+>) constitutes the first measurement of this asymmetry at the hadron collider, with uncertainty at the level of the 2007 world average. The measurement presented in this thesis has become possible due to the sophisticated online and offline tracking/vertexing implemented at D0, and the regular reversal of the polarities of the D0 detector magnets.

  4. Measurement of the Branching fraction ratio BR (B<sup>+> $\\bar{D}$<sup>0sup>K+>→ [K<sup>+π->] K<sup>+>)/(BR (B<sup>+> $\\bar{D}$<sup>0sup>π+> [K<sup>+π-+>) with the CDF II detector

    Energy Technology Data Exchange (ETDEWEB)

    Squillacioti, Paola [Univ. of Siena (Italy)

    2006-11-01

    In this thesis the author has described the first measurement performed at a hadron collider of the branching fraction of the Cabibbo-suppressed mode B<sup>+> → $\\bar{D}$<sup>0sup> K<sup>+>. The analysis has been performed with 360 pb<sup>-1sup> of data collected by the CDF II detector.

  5. Measurement of the B{sup ¯0}–B{sup 0} and B{sup ¯}{sub s}{sup 0}–B{sub s}{sup 0} production asymmetries in pp collisions at √(s)=7 TeV

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Akar, S. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); An, L. [Center for High Energy Physics, Tsinghua University, Beijing (China); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2014-12-12

    The B{sup ¯0}–B{sup 0} and B{sup ¯}{sub s}{sup 0}–B{sub s}{sup 0} production asymmetries, A{sub P}(B{sup 0}) and A{sub P}(B{sub s}{sup 0}), are measured by means of a time-dependent analysis of B{sup 0}→J/ψK{sup ⁎0}, B{sup 0}→D{sup −}π{sup +} and B{sub s}{sup 0}→D{sub s}{sup −}π{sup +} decays, using a data sample corresponding to an integrated luminosity of 1.0 fb{sup −1}, collected by LHCb in pp collisions at a centre-of-mass energy of 7 TeV. The measurements are performed as a function of transverse momentum and pseudorapidity of the B{sup 0} and B{sub s}{sup 0} mesons within the LHCb acceptance. The production asymmetries, integrated over p{sub T} and η in the range 4sup 0})=(−0.35±0.76±0.28)% and A{sub P}(B{sub s}{sup 0})=(1.09±2.61±0.66)%, where the first uncertainties are statistical and the second systematic.

  6. {sup 123}I and {sup 13I} purification for biomolecules labelling; Purificacao de {sup 123}I e {sup 131}I para marcacao de biomoleculas

    Energy Technology Data Exchange (ETDEWEB)

    Catanoso, Marcela Forli

    2011-07-01

    The {sup 123}I and {sup 131}I are iodine radioisotopes widely used in Nuclear Medicine. The radioisotope {sup 123}I is used in diagnosis through the SPECT technique and is routinely produced at IPEN in cyclotron through the reaction: '1{sup 24}Xe (p, 2n) '1{sup 23}Cs -> {sup 123}Xe -> {sup 123}I. The radioisotope {sup 131}I is used both in diagnosis and therapy due to its physical characteristics of decay by {beta}{sup -} and its {gamma}-ray emissions that are softened with the use of specific collimators for diagnosis. It is routinely produced at IPEN using the nuclear reactor through the indirect reaction: {sup 130}Te (n, {gamma}) ->{sup 131}Te -> {sup 131}I, irradiating compounds containing Te. The radiopharmaceuticals prepared with these radioisotopes go through rigorous quality control tests and the chemical purity of the primary radioisotopes {sup 123}I and {sup 131}I are within the permissible limits currently defined. However, the presence of some chemical contaminants can prejudice the biomolecules labeling (monoclonal antibodies and peptides), that will produce radiopharmaceuticals of first generation to the oncology area. The aim of this work was to obtain a new purification method of these radioisotopes, allowing the labeling of biomolecules and also to established a process control on those radioisotopes. The methodology was separated on 3 steps: Evaluation of '1{sup 23}I e {sup 131}I radionuclidic purity using a hyper pure germanium detector, chemical purity using ICP-OES and the retention and elution study of {sup 131}I in several absorbers to choose the most appropriate for the purification tests analyzing the behavior of the possible contaminants. The radionuclidic analyses showed the presence of Te and Co on {sup 131}I samples and Te, Tc e Co on {sup 123}I samples. The chemical purity analyses showed the presence of Al and Mo in {sup 123}I, coming from the window material of the target holder and the presence of Al and Te in {sup

  7. Measurement of the B<sup>±>c Meson Lifetime Using B<sup>±>c→ J/Ψ + l<sup>±> + X Decays

    Energy Technology Data Exchange (ETDEWEB)

    Hartz, Mark Patrick [Univ. of Pittsburgh, PA (United States)

    2008-01-01

    This thesis describes a measurement of the average proper decay time of the B<sup>±>c mesons, the ground state of bottom and charm quark bound states. The lifetime measurement is carried out in the decay modes B<sup>±>c → J/Ψ + e<sup>±> + X and B<sup>±>c → J/Ψ + μ<sup>±> + X, where the J/Ψ decays as J/Ψ {yields} μ<sup>+μ-> and the X are unmeasured particles such as ve or vμ. The data are collect by the CDF II detector which measures the properties of particles created in √s = 1.96 TeV p$\\bar{p}$ collisions delivered by the Fermilab Tevatron. This measurement uses ~ 1 fb<sup>-1sup> of integrated luminosity. The measured average proper decay time of B<sup>±>c mesons, τ = 0.475-0.049<sup>+0.053sup>(stat.) ± 0.018(syst.) ps, is competitive with the most precise measurements in the world and confirms previous measurements and theoretical predictions.

  8. Measurement of the B{sup 0}–B{sup ¯0} oscillation frequency Δm{sub d} with the decays B{sup 0}→D{sup −}π{sup +} and B{sup 0}→J/ψK{sup ⁎0}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adametz, A. [Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg (Germany); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne (Switzerland); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); and others

    2013-02-26

    The B{sup 0}–B{sup ¯0} oscillation frequency Δm{sub d} is measured by the LHCb experiment using a dataset corresponding to an integrated luminosity of 1.0 fb{sup −1} of proton–proton collisions at √(s)=7 TeV, and is found to be Δm{sub d}=0.5156±0.0051(stat.)±0.0033(syst.) ps{sup −1}. The measurement is based on results from analyses of the decays B{sup 0}→D{sup −}π{sup +} (D{sup −}→K{sup +}π{sup −}π{sup −}) and B{sup 0}→J/ψK{sup ⁎0} (J/ψ→μ{sup +}μ{sup −},K{sup ⁎0}→K{sup +}π{sup −}) and their charge conjugated modes.

  9. Lifetime measurement in the yrast band of {sup 119}I

    Energy Technology Data Exchange (ETDEWEB)

    Lobach, Yu.N. [Institute for Nuclear Research UAS, Kiev (Ukraine); Pasternak, A.A. [A.F. Ioffe Physical Technical Institute RAS, St. Petersbourg (Russian Federation); Srebrny, J. [Nuclear Physics Division, IEP, University of Warsaw, Warsaw (Poland)] [and others

    1999-05-01

    The lifetime of levels in the yrast band of {sup 119}I were measured by DSAM and RDM using the {sup 109}Ag({sup 13}C,3n) reaction at E = 54 MeV. The detailed description of data analysis including the stopping power determination and estimation of side feeding time is given. A modified method of RDM data analysis - Recoil Distance Doppler Shape Attenuation (RDDSA) is used. (author) 17 refs, 4 figs, 1 tab

  10. High-spin structure of the neutron-rich sup 1 sup 0 sup 9 sup , sup 1 sup 1 sup 1 sup , sup 1 sup 1 sup 3 sup sub 4 sup sub 5 Rh isotopes

    CERN Document Server

    Venkova, T; Bauchet, A; Deloncle, I; Astier, A; Buforn, N; Meyer, M; Prevost, A; Redon, N; Stezowski, O; Lalkovski, S; Donadille, L; Dorvaux, O; Gall, B J P; Schulz, N; Lucas, R; Minkova, A

    2002-01-01

    The sup 1 sup 0 sup 9 sup , sup 1 sup 1 sup 1 sup , sup 1 sup 1 sup 3 Rh nuclei have been produced as fission fragments in the fusion reaction sup 1 sup 8 O + sup 2 sup 0 sup 8 Pb at 85 MeV. Their level schemes have been built from gamma-rays detected using the Euroball IV array. High-spin states of the neutron-rich sup 1 sup 1 sup 1 sup , sup 1 sup 1 sup 3 Rh nuclei have been identified for the first time. Several rotational bands with the odd proton occupying the pi g sub 9 sub / sub 2 , pi p sub 1 sub / sub 2 and pi(g sub 7 sub / sub 2 /d sub 5 sub / sub 2) sub-shells have been observed. A band of low-energy transitions has been identified at excitation energy around 2 MeV in sup 1 sup 0 sup 9 sup , sup 1 sup 1 sup 1 Rh, which can be interpreted in terms of three-quasiparticle excitation, pi g sub 9 sub / sub 2 nu h sub 1 sub 1 sub / sub 2 nu g sub 7 sub / sub 2 /d sub 5 sub / sub 2. In addition another structure built on states located at low excitation energy (608 keV in sup 1 sup 1 sup 1 Rh, 570 keV in ...

  11. Search for triboson W{sup ±}W{sup ±}W{sup -+} production in pp collisions at √(s) = 8 TeV with the ATLAS detector

    Energy Technology Data Exchange (ETDEWEB)

    Aaboud, M. [Univ. Mohamed Premier et LPTPM, Oujda (Morocco). Faculte des Sciences; Aad, G. [CPPM, Aix-Marseille Univ. et CNRS/IN2P3, Marseille (France); Abbott, B. [Oklahoma Univ., Norman, OK (United States). Homer L. Dodge Dept. of Physics and Astronomy; Collaboration: ATLAS Collaboration; and others

    2017-03-15

    This paper reports a search for triboson W{sup ±}W{sup ±}W{sup -+} production in two decay channels (W{sup ±}W{sup ±}W{sup -+} → l{sup ±}νl{sup ±}νl{sup -+}ν and W{sup ±}W{sup ±}W{sup -+} → l{sup ±}νl{sup ±}νjj with l = e, μ) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb{sup -1} at a centre-of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with exactly three charged leptons, or two leptons with the same electric charge in association with two jets, are selected. The total number of events observed in data is consistent with the Standard Model (SM) predictions. The observed 95% confidence level upper limit on the SM W{sup ±}W{sup ±}W{sup -+} production cross section is found to be 730 fb with an expected limit of 560 fb in the absence of SM W{sup ±}W{sup ±}W{sup -+} production. Limits are also set on WWWW anomalous quartic gauge couplings. (orig.)

  12. Study of the Rare Hadronic Decays D<sup>+>s → K<sup>+π>0sup>, D<sup>+>s → π<sup>+> K<sup>0sup>s and D<sup>+>s → π<sup>+> π<sup>0sup> at BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Nikolich, Michael Borivoje [Imperial College, London (United Kingdom)

    2007-02-01

    Ds mesons are fully reconstructed from four final states using approximately 229fb<sup>-1sup> of data delivered by the PEP-II e<sup>+e-> collider and collected by the BaBar experiment at the Stanford Linear Accelerator Centre during the period 1999 to 2004. Measurements of the exclusive branching fractions (average over charge-conjugate decays), B, of the decays D<sup>+>s → K<sup>+π>0sup>, D<sup>+>s→ π<sup>+K>0sup> and D<sup>+>s → π<sup>+π>0sup> relative to the reference mode D<sup>+>s → K<sup>+$\\bar{K}$>0sup> are presented.

  13. K*(892)<sup>0sup>Λ and K<sup>+Σ*>(1385)<sup>-> Photoproduction on the Deuteron

    Energy Technology Data Exchange (ETDEWEB)

    Mattione, Paul [Rice Univ., Houston, TX (United States)

    2011-05-01

    Thirteen N<sup>*> states have been well-established according to the Particle Data Group, but some relativized quark models predict that many more N<sup>*> resonances exist. Diquark models predict that the N<sup>*> spectrum is limited by a correlated quark-pair in the nucleon, but there is strong evidence for the existence of the N 3/2<sup>+>(1900)<sup>**> resonance, which is absent in diquark models. Measuring the spectrum of N<sup>*> states will provide valuable information on the relevant degrees of freedom within the nucleons. Most of the experimental searches for the N<sup>*> states have been conducted in the π N channel. Some models of baryon decays predict that most of the unobserved N<sup>*> states couple somewhat weakly to the π N channel, and that some couple non-negligibly to the KY, K<sup>*>Y, and KY<sup>*> channels. Measurements of the cross sections and polarization observables of strangeness photoproduction reactions can provide additional information on the spectrum of N<sup>*> states. These measurements can be used in coupled-channel partial-wave analyses that can provide simultaneous constraints on the N<sup>*> resonance parameters from several channels. These analyses can also take into account hadronic rescattering, which is predicted to have a large effect on the measured cross sections. However, to determine the isospin decomposition of the photo-transition amplitudes to these channels, photoproduction measurements are necessary on both the proton and the neutron. Measurements of the differential cross sections of the γn\\rightarrow K<sup>*>(892)<sup>0sup>Λ and γn→ K<sup>+Σ*>(1385)<sup>-> reactions have been performed using data from the Jefferson Lab Hall B CLAS g13 experiment. No experimental cross section data have yet been published on the γ n\\rightarrow K<sup>*>(892)<sup>0sup>Λ reaction, and the only published cross section data on

  14. Spontaneous-fission decay properties and production cross-sections for the neutron-deficient nobelium isotopes formed in the sup 4 sup 4 sup , sup 4 sup 8 Ca+ sup 2 sup 0 sup 4 sup , sup 2 sup 0 sup 6 sup , sup 2 sup 0 sup 8 Pb reactions

    CERN Document Server

    Belozerov, A V; Chepigin, V I; Drobina, T P; Gorshkov, V A; Kabachenko, A P; Malyshev, O N; Merkin, I M; Oganessian, Yu T; Popeko, A G; Sagaidak, R N; Svirikhin, A I; Yeremin, A V; Berek, G; Brida, I; Sáro, S

    2003-01-01

    Heavy-ion fusion reactions sup 4 sup 8 Ca+ sup 2 sup 0 sup 4 Pb and sup 4 sup 4 Ca+ sup 2 sup 0 sup 8 Pb leading to the same compound nucleus sup 2 sup 5 sup 2 No sup * were run in attempts to produce new neutron-deficient spontaneous-fission isotopes of sup 2 sup 4 sup 9 sup , sup 2 sup 5 sup 0 No using the electrostatic separator VASSILISSA. Production cross-sections for the spontaneous-fission activities with the half-lives 5.6 and 54 mu s observed in these reactions are compared with the measured ones for the well-known isotopes of sup 2 sup 5 sup 1 sup - sup 2 sup 5 sup 5 No formed in the heavy-ion fusion reactions sup 4 sup 8 Ca+ sup 2 sup 0 sup 6 Pb and sup 4 sup 8 Ca+ sup 2 sup 0 sup 8 Pb. The obtained excitation functions for the reaction products formed after the evaporation of 1-4 neutrons from the corresponding compound No nuclei have been compared with similar data obtained earlier and results of statistical model calculations. (orig.)

  15. Complete and incomplete fusion measurement and analysis of excitation functions in sup 1 sup 2 C + sup 1 sup 2 sup 8 Te system at energies near and above the coulomb barrier

    CERN Document Server

    Sharma, M K; Prasad, R; Gupta, S; Musthafa, M M; Bhardwaj, H D; Sinha, A K

    2003-01-01

    In order to study complete and incomplete fusion in heavy ion induced reactions the experiment has been carried out for measuring excitation functions (EF's) for several reactions in the system sup 1 sup 2 C + sup 1 sup 2 sup 8 Te, in the energy range approx = 42 - 82 MeV, using activation technique. To the best of our knowledge EF's for presently measured reactions are being reported for the first time. The measured EF's have been compared with those calculated theoretically using codes CASCADE and ALICE-91. Effect of variation of parameters, of the codes, on calculated EF's has also been studied. The analysis of the present data indicates presence of contributions from incomplete fusion in some cases. In general, theoretical calculations agree well with the experimental data.

  16. Half-lives of isomeric levels of sup 1 sup 0 sup 7 sup m Ag, sup 1 sup 0 sup 9 sup m Ag and sup 1 sup 0 sup 3 sup m Rh photoactivated by sup 6 sup 0 Co gamma-ray irradiation

    CERN Document Server

    Yoshida, E; Kojima, Y; Shizuma, K

    2000-01-01

    Photoactivation by gamma-rays from sup 6 sup 0 Co of 10 kCi has been performed for isomers of sup 1 sup 0 sup 7 sup m Ag, sup 1 sup 0 sup 9 sup m Ag and sup 1 sup 0 sup 3 sup m Rh and half-lives of these isomers were determined. Gamma-rays emitted from sup 1 sup 0 sup 7 sup m Ag and sup 1 sup 0 sup 9 sup m Ag were measured with a low-background Ge detector and internal conversion electrons from sup 1 sup 0 sup 3 sup m Rh were measured with a 2 pi gas flow counter. The half-lives obtained are: sup 1 sup 0 sup 7 sup m Ag: 44.5+-0.8 s, sup 1 sup 0 sup 9 sup m Ag: 38.0+-1.2 s and sup 1 sup 0 sup 3 sup m Rh: 54.8+-3.8 min. The results are in agreement with previous values obtained by different excitation methods.

  17. Search for the rare decay D{sup 0}→μ{sup +}μ{sup −}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2013-08-09

    A search for the rare decay D{sup 0}→μ{sup +}μ{sup −} is performed using a data sample, corresponding to an integrated luminosity of 0.9 fb{sup −1}, of pp collisions collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The observed number of events is consistent with the background expectations and corresponds to an upper limit of B(D{sup 0}→μ{sup +}μ{sup −})<6.2(7.6)×10{sup −9} at 90% (95%) confidence level. This result represents an improvement of more than a factor twenty with respect to previous measurements.

  18. Measurement of the Z/γ* (→ e<sup>+e->) + ≥ n Jet Production Cross Sections in p$\\bar{p}$ Collisions at √s = 1.96 TeV

    Energy Technology Data Exchange (ETDEWEB)

    Buehler, Marc [Univ. of Illinois, Chicago, IL (United States)

    2005-01-01

    A study of events with Z/γ* bosons and hadronic jets produced at the Tevatron in p$\\bar{p}$ collisions at a center of mass energy of 1.96 TeV is presented. The data consist of approximately 14,000 Z/γ* → e<sup>+e-> decay candidates from 343 pb<sup>-1sup> of integrated luminosity collected with the D0 detector. Cross sections and jet production properties have been measured for Z/γ* + ≥ 0 to 5 jet events. This measurement represents a significant improvement over previous measurements at the Tevatron, and it is the first at this center of mass energy with the D0 detector. The results are in good agreement with QCD predictions.

  19. Cross sections of photoneutron reactions on /sup 64/,/sup 66/,/sup 68/n, /sup 70/,/sup 72/,/sup 74/,/sup 76/Ge, /sup 76/,/sup 78/,/sup 80/,/sup 82/Se

    Energy Technology Data Exchange (ETDEWEB)

    Goryachev, A M; Zalesnyi, G N [Saratovskii Gosudarstvennyi Univ. (USSR); Tulupov, B A [AN SSSR, Moscow. Inst. Yadernykh Issledovanii

    1975-01-01

    Photoneutron cross-sections for /sup 64/,/sup 66/,/sup 68/Zn, /sup 70/,/sup 72/,/sup 74/,/sup 76/Ge, and /sup 76/,/sup 78/,/sup 80/,/sup 82/Se nuclei from the threshold energy to 24 MeV with 0.2 MeV step have been measured. Results of the experiment are compared to predictions of the collective dynamical model of a giant resonance.

  20. /sup 15/N(p,. cap alpha. )/sup 12/C reaction with polarized protons from 0. 34 to 1. 21 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Pepper, G H; Brown, L [Carnegie Institution of Washington, D.C. (USA). Dept. of Terrestrial Magnetism

    1976-03-29

    A polarized beam was used to measure angular distributions of the analyzing power of the /sup 15/N(p,..cap alpha..)/sup 12/C reaction at 0.34 MeV and at five energies from 0.92 to 1.21 MeV. The analyzing power can be fitted with associated Legendre polynomials, P/sub 1//sup 1/ and P/sub 2//sup 1/ sufficing to describe the results except near 1.2 MeV where P/sub 3//sup 1/ is also required. Polarization excitation functions were measured throughout the entire energy range at angles where the polynomials P/sub 2//sup 1/ and P/sub 3//sup 1/ are zero. A polarization contour map is given.

  1. Quantitative {sup 1}H and hyperpolarized {sup 3}He magnetic resonance imaging: Comparison in chronic obstructive pulmonary disease and healthy never-smokers

    Energy Technology Data Exchange (ETDEWEB)

    Owrangi, Amir M., E-mail: aowrangi@robats.ca [Imaging Research Laboratories, Robarts Research Institute, 100 Perth Drive, London, Canada N6A 5K8 (Canada); Graduate Program in Biomedical Engineering, The University of Western Ontario, London (Canada); Wang, Jian X., E-mail: jxwang@robats.ca [Imaging Research Laboratories, Robarts Research Institute, 100 Perth Drive, London, Canada N6A 5K8 (Canada); Applied Science Laboratories, General Electric Healthcare (Canada); Wheatley, Andrew, E-mail: awheat@imaging.robarts.ca [Imaging Research Laboratories, Robarts Research Institute, 100 Perth Drive, London, Canada N6A 5K8 (Canada); McCormack, David G., E-mail: David.Mccormack@lhsc.on.ca [Imaging Research Laboratories, Robarts Research Institute, 100 Perth Drive, London, Canada N6A 5K8 (Canada); Division of Respirology, Department of Medicine, The University of Western Ontario, London (Canada); Parraga, Grace, E-mail: gparraga@robats.ca [Imaging Research Laboratories, Robarts Research Institute, 100 Perth Drive, London, Canada N6A 5K8 (Canada); Graduate Program in Biomedical Engineering, The University of Western Ontario, London (Canada); Department of Medical Imaging, The University of Western Ontario, London (Canada); Department of Medical Biophysics, The University of Western Ontario, London (Canada)

    2014-01-15

    Objective: The aim of this study was to quantitatively evaluate the relationship between short echo time pulmonary {sup 1}H magnetic resonance imaging (MRI) signal intensity (SI) and {sup 3}He MRI apparent diffusion coefficients (ADC), high-resolution computed tomography (CT) measurements of emphysema, and pulmonary function measurements. Materials and methods: Nine healthy never-smokers and 11 COPD subjects underwent same-day plethysmography, spirometry, short echo time ((TE) = 1.2 ms) {sup 1}H and diffusion-weighted hyperpolarized {sup 3}He MRI (b = 1.6 s/cm{sup 2}) at 3.0 T. In addition, for COPD subjects only, CT densitometry was also performed. Results: Mean {sup 1}H SI was significantly greater for never-smokers (12.1 ± 1.1 arbitrary units (AU)) compared to COPD subjects (10.9 ± 1.3 AU, p = 0.04). The {sup 1}H SI AP-gradient was also significantly greater for never-smokers (0.40 AU/cm, R{sup 2} = 0.94) compared to COPD subjects (0.29 AU/cm, R{sup 2} = 0.968, p = 0.05). There was a significant correlation between {sup 1}H SI and {sup 3}He ADC (r = −0.58, p = 0.008) and significant correlations between {sup 1}H MR SI and CT measurements of emphysema (RA{sub 950}, r = −0.69, p = 0.02 and HU{sub 15}, r = 0.66, p = 0.03). Conclusions: The significant and moderately strong relationship between {sup 1}H SI and {sup 3}He ADC, as well as between {sup 1}H SI and CT measurements of emphysema suggests that these imaging methods and measurements may be quantifying similar tissue changes in COPD and that pulmonary {sup 1}H SI may be used to monitor emphysema as a complement to CT and noble gas MRI.

  2. Search for Doubly-charged Higgs Boson Production in the Decay H<sup>++> H<sup>-->→ μ<sup>+μ+μ-μ-> with 1.1 fb<sup>-1sup> at D0 Detector

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Tae Jeong [Korea Univ., Seoul (South Korea)

    2007-06-01

    This work presents a search for the pair production of doubly-charged Higgs bosons in the process p{bar p} → H<sup>++H--> → μ<sup>+μ+μ-μ-> using the data corresponding to an integrated luminosity of about 1.1 fb<sup>-1sup>. This is the complete dataset of RunIIa taken from April 19, 2002 to February 22, 2006 by the D0 experiment at the Fermilab Tevatron Collider. In the absence of significant excess above standard model background, 95% confidence level mass limits of M(H$±±\\atop{L}$) > 150 GeV and M(H$±±\\atop{R}$) > 126.5 GeV are set for left-handed and right-handed doubly-charged Higgs bosons respectively assuming a 100% branching ratio into muons.

  3. Charge distribution studies in the fast-neutron-induced fission of sup 2 sup 3 sup 2 Th, sup 2 sup 3 sup 8 U, sup 2 sup 4 sup 0 Pu and sup 2 sup 4 sup 4 Cm

    CERN Document Server

    Naik, H; Iyer, R H

    2003-01-01

    Charge distribution studies for heavy-mass fission products were carried out in the fast-neutron-induced fission of sup 2 sup 3 sup 2 Th, sup 2 sup 3 sup 8 U, sup 2 sup 4 sup 0 Pu and sup 2 sup 4 sup 4 Cm using radiochemical and gamma-ray spectrometric techniques. The width parameter(sigma sub Z /sigma sub A), the most probable charge/mass (Z sub P /A sub P), the charge polarization (DELTA Z) and the slope of charge polarization [ delta(DELTA Z)/delta A sup '] as a function of the fragment mass (A sup ') were deduced. The average charge dispersion parameter (left angle sigma sub Z right angle) and proton odd-even effect (delta sub p) were also obtained for these fissioning systems. The left angle sigma sub Z right angle and delta sub p values in the fissioning systems sup 2 sup 4 sup 1 Pu sup * and sup 2 sup 4 sup 5 Cm sup * were determined for the first time. The delta(DELTA Z)/delta A sup ' value is also determined for the first time in the fissioning systems sup 2 sup 3 sup 9 U sup * , sup 2 sup 4 sup 1 Pu...

  4. Observation of CP violation in B{sup {+-}}{yields}DK{sup {+-}} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); Archilli, F. [Laboratori Nazionali dell' INFN di Frascati, Frascati (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); and others

    2012-06-06

    An analysis of B{sup {+-}}{yields}DK{sup {+-}} and B{sup {+-}}{yields}D{pi}{sup {+-}} decays is presented where the D meson is reconstructed in the two-body final states: K{sup {+-}}{pi}{sup -}Or +, K{sup +}K{sup -} and {pi}{sup +}{pi}{sup -}. Using 1.0 fb{sup -1} of {radical}(s)=7 TeV pp collisions, measurements of several observables are made including the first observation of the suppressed mode B{sup {+-}}{yields}[{pi}{sup {+-}}K{sup -} Or+]{sub D}K{sup {+-}}. CP violation in B{sup {+-}}{yields}DK{sup {+-}} decays is observed with 5.8{sigma} significance.

  5. Triangle singularities in B{sup -} → D{sup *0}π{sup -}π{sup 0}η and B{sup -} → D{sup *0}π{sup -}π{sup 0}π{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Pavao, R.; Sakai, S.; Oset, E. [Centro Mixto Universidad de Valencia-CSIC Institutos de Investigacion de Paterna, Departamento de Fisica Teorica y IFIC, Valencia (Spain)

    2017-09-15

    The possible role of the triangle mechanism in the B{sup -} decay into D{sup *0}π{sup -}π{sup 0}η and D{sup *0}π{sup -}π{sup 0}π{sup -} is investigated. In this process, the triangle singularity appears from the decay of B{sup -} into D{sup *0}K{sup -}K{sup *0} followed by the decay of K{sup *0} into π{sup -}K{sup +} and the fusion of the K{sup +}K{sup -}, which forms the a{sub 0}(980) or f{sub 0}(980), which finally decay into π{sup 0}η or π{sup +}π{sup -}, respectively. The triangle mechanism from the anti K{sup *}K anti K loop generates a peak around 1420 MeV in the invariant mass of π{sup -}a{sub 0} or π{sup -}f{sub 0}, and it gives sizable branching fractions, Br(B{sup -} → D{sup *0}π{sup -}a{sub 0}; a{sub 0} → π{sup 0}η) = (1.66 ± 0.45) x 10{sup -6} and Br(B{sup -} → D{sup *0}π{sup -}f{sub 0}; f{sub 0} → π{sup +}π{sup -}) = (2.82 ± 0.75) x 10{sup -6}. (orig.)

  6. Measurement of K{sup {+-}}{yields}{pi}{sup {+-}}{gamma}{gamma} decays

    Energy Technology Data Exchange (ETDEWEB)

    Morales Morales, Cristina

    2009-07-21

    The goal of this thesis was an experimental test of an effective theory of strong interactions at low energy, called Chiral Perturbation Theory (ChPT). Weak decays of kaon mesons provide such a test. In particular, K{sup {+-}} {yields} {pi}{sup {+-}}{gamma}{gamma} decays are interesting because there is no tree-level O(p{sup 2}) contribution in ChPT, and the leading contributions start at O(p{sup 4}). At this order, these decays include one undetermined coupling constant, c. Both the branching ratio and the spectrum shape of K{sup {+-}} {yields} {pi}{sup {+-}}{gamma}{gamma} decays are sensitive to this parameter. O(p{sup 6}) contributions to K{sup {+-}} {yields} {pi}{sup {+-}}{gamma}{gamma} ChPT predict a 30-40% increase in the branching ratio. From the measurement of the branching ratio and spectrum shape of K{sup {+-}} {yields} {pi}{sup {+-}}{gamma}{gamma} decays, it is possible to determine a model dependent value of c and also to examine whether the O(p{sup 6}) corrections are necessary and enough to explain the rate. About 40% of the data collected in the year 2003 by the NA48/2 experiment have been analyzed and 908 K{sup {+-}} {yields} {pi}{sup {+-}}{gamma}{gamma} candidates with about 8% background contamination have been selected in the region with z=m{sup 2}{sub {gamma}}{sub {gamma}}/m{sub K}{sup 2}{>=}0.2. Using 5,750,121 selected K{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup 0} decays as normalization channel, a model independent differential branching ratio of K{sup {+-}} {yields} {pi}{sup {+-}}{gamma}{gamma} has been measured to be: BR(K{sup {+-}} {yields} {pi}{sup {+-}}{gamma}{gamma}, z{>=}0.2)=(1.018{+-}0.038{sub stat}{+-}0.039{sub syst}{+-}0.004{sub ext}).10{sup -6}. From the fit to the O(p{sup 6}) ChPT prediction of the measured branching ratio and the shape of the z-spectrum, a value of c=1.54{+-}0.15{sub stat}{+-}0.18{sub syst} has been extracted. Using the measured c value and the O(p{sup 6}) ChPT prediction, the branching ratio for z=m{sup 2}{sub

  7. Parameter learning in MTE networks using incomplete data

    DEFF Research Database (Denmark)

    Fernández, Antonio; Langseth, Helge; Nielsen, Thomas Dyhre

    a considerable computational burden as well as the inability to handle missing values in the training data. In this paper we describe an EM-based algorithm for learning the maximum likelihood parameters of an MTE network when confronted with incomplete data. In order to overcome the computational difficulties we......Bayesian networks with mixtures of truncated exponentials (MTEs) are gaining popularity as a flexible modelling framework for hybrid domains. MTEs support efficient and exact inference algorithms, but estimating an MTE from data has turned out to be a difficult task. Current methods suffer from...

  8. Experimental Cross Sections for Reactions of Heavy Ions and <sup>208sup>Pb, <sup>209sup>Bi, <sup>238sup>U, and <sup>248sup>Cm Targets

    Energy Technology Data Exchange (ETDEWEB)

    Patin, Joshua Barnes [Univ. of California, Berkeley, CA (United States)

    2002-01-01

    The study of the reactions between heavy ions and <sup>208sup>Pb, <sup>209sup>Bi, <sup>238sup>U, and <sup>248sup>Cm Cm targets was performed to look at the differences between the cross sections of hot and cold fusion reactions. Experimental cross sections were compared with predictions from statistical computer codes to evaluate the effectiveness of the computer code in predicting production cross sections. Hot fusion reactions were studied with the MG system, catcher foil techniques and the Berkeley Gas-filled Separator (BGS). 3n- and 4n-exit channel production cross sections were obtained for the <sup>238sup>U(>18sup>O,xn)>256-xsup>Fm, <sup>238sup>U(>22sup>Ne,xn)>260-xsup>No, and <sup>248sup>Cm(>15sup>N,xn)>263-xsup>Lr reactions and are similar to previous experimental results. The experimental cross sections were accurately modeled by the predictions of the HIVAP code using the Reisdorf and Schaedel parameters and are consistent with the existing systematics of 4n exit channel reaction products. Cold fusion reactions were examined using the BGS. The <sup>48sup>Pb(>238sup>Ca,xn)>256-xsup>No, <sup>208sup>Pb(>50sup>Ti,xn)>258-xsup>Rf, <sup>208sup>Pb(>51sup>V,xn)>259-xsup>Db, <sup>50sup>Bi(>238sup>Ti,xn)>259-xsup>Db, and <sup>209sup>Bi(>51sup>V,xn)>260-xsup>Sg reactions were studied. The experimental production cross sections are in agreement with the results observed in previous experiments. It was necessary to slightly alter the Reisdorf and Schaedel parameters for use in the HIVAP code in order to more accurately model the experimental data. The cold fusion experimental results are in agreement with current 1n- and 2n-exit channel systematics.

  9. Measurement of the B<sup>0sup>s lifetime in B<sup>0sup>s → K<sup>+> K<sup>-> decays

    Energy Technology Data Exchange (ETDEWEB)

    Pounder, Nicola Louise [Wolfson College, Oxford (United Kingdom)

    2009-01-01

    A method is presented to simultaneously separate the contributions to a sample of B<sup>0sup>s → h<sup>+h'-> decays, where h = π or K, and measure the B meson lifetimes in the sample while correcting for the bias in the lifetime distributions due to the hadronic trigger at the CDF experiment. Using 1 fb<sup> -1sup> of data collected at CDF the B<sup>0sup> lifetime is measured as τB<sup>0sup> = 1.558-0.047<sup>+0.050sup>stat ± 0.028syst ps, in agreement with the world average measurement. The B<sup>0sup>s lifetime in the Bs<sup>0sup> → K<sup>+K-> decay is measured as τB<sup>0sup>s → K<sup>+K-> = 1.51-0.11<sup>+0.13sup>stat ± 0.04 syst ps. No difference is observed between the lifetime and other measurements of the average B<sup>0sup>s lifetime or the lifetime of the light B<sup>0sup>s mass eigenstate determined from B<sup>0sup>s → J/ΨΦ decays. With the assumptions that B<sup>0sup>s → K<sup>+K-> is 100% CP-even and that τB<sup>0sup>s = τsub B<sup>0sup> the width difference in the B<sup>0sup>s system is determined as ΔΓ<sup>CP>/Γ = 0.03-0.15<sup>+0.17sup>stat ± 0.05syst using the current world average B<sup>0sup> lifetime. This is consistent with zero and with the current world average measurement.

  10. Triangle singularities in B{sup -} → K{sup -}π{sup -}D{sup +}{sub s0} and B{sup -} → K{sup -}π{sup -}D{sup +}{sub s1}

    Energy Technology Data Exchange (ETDEWEB)

    Sakai, S.; Oset, E. [Departamento de Fisica Teorica y IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigacion de Paterna, Valencia (Spain); Ramos, A. [Universitat de Barcelona, Departament de Fisica Quantica i Astrofisica and Institut de Ciencies del Cosmos, Barcelona (Spain)

    2018-01-15

    We study the appearance of structures in the decay of the B{sup -} into K{sup -}π{sup -}D{sub s0}{sup +}(2317) and K{sup -}π{sup -}D{sub s1}{sup +}(2460) final states by forming invariant mass distributions of π{sup -}D{sub s0}{sup +} and π{sup -}D{sub s1}{sup +} pairs, respectively. The structure in the distribution is associated to the kinematical triangle singularity that appears when the B{sup -} → K{sup -}K{sup *0}D{sup 0} (B{sup -} → K{sup -}K{sup *0}D{sup *0}) decay process is followed by the decay of the K{sup *0} into π{sup -}K{sup +} and the subsequent rescattering of the K{sup +}D{sup 0} (K{sup +}D{sup *0}) pair forming the D{sub s0}{sup +}(2317) (D{sub s1}{sup +}(2460)) resonance. We find this type of non-resonant peaks at 2850 MeV in the invariant mass of π{sup -}D{sub s0} pairs from B{sup -} → K{sup -}π{sup -}D{sub s0}{sup +}(2317) decays and around 3000 MeV in the invariant mass of π{sup -}D{sub s1}{sup +} pairs from B{sup -} → K{sup -}π{sup -}D{sub s1}{sup +}(2460) decays. By employing the measured branching ratios of the B{sup -} → K{sup -}K{sup *0}D{sup 0} and B{sup -} → K{sup -}K{sup *0}D{sup *0} decays, we predict the branching ratios for the processes B{sup -} into K{sup -}π{sup -}D{sub s0}{sup +}(2317) and K{sup -}π{sup -}D{sub s1}{sup +}(2460), in the vicinity of the triangle singularity peak, to be about 8 x 10{sup -6} and 1 x 10{sup -6}, respectively. The observation of this reaction would also give extra support to the molecular picture of the D{sub s0}{sup +}(2317) and D{sub s1}{sup +}(2460). (orig.)

  11. Synthesis and spectral properties of diethyl organylchalcogenoalkyl(alkyl)malonates, RX(CH/sub 2/)/sub n/CR'(COOC/sub 2/H/sub 5/)/sub 2/, and 5-alkyl-5-(organylchalcogenoalkyl)barbiturates, RX(CH/sub 2/)/sub n/C(R')CONHC(Y)NHCO (X = Se, Te)

    Energy Technology Data Exchange (ETDEWEB)

    Grigsby, Jr, R A; Irgolic, K J; Knapp, Jr, F F

    1983-01-01

    Barbiturates substituted at the 5-position with organyltelluroalkyl or organylselenoalkyl groups were prepared by ring annulation of appropriately substituted diethyl malonates with urea or thiourea. The substituted diethyl malonates (phenyltellurobutyl(ethyl), i-propyltelluropropyl(ethyl), i-propyltelluropropyl(allyl), i-propyselenopropyl(ethyl), and phenylselenohexyl(methyl)) were prepared in 55-91% yield by reaction of diethyl omega-bromoalkyl(alkyl)malonates with organyltellurolates or selenolates (RXNa; X = Se, Te) in ethanol/benzene. The following barbiturates were obtained in 28-84% yield: phenyltellurobutyl(ethyl), m.p. 100/sup 0/C; i-propyltelluropropyl(ethyl), m.p. 119/sup 0/C; i-propylselenopropyl(ethyl), m.p. 137/sup 0/C; phenyl-selenohexyl(methyl), m.p. 124/sup 0/C. The 5-substituted thiobarbiturates i-propyltelluropropyl(ethyl)-(m.p. 75/sup 0/C) and i-propylselenopropyl(ethyl)thiobarbiturate (m.p. 83/sup 0/C) were isolated in 32 and 20% yield, respectively. The barbiturates and thiobarbiturates were purified by chromatography and recrystallization and characterized by elemental analyses, mass spectrometry, /sup 1/H, /sup 125/Te and /sup 77/Se NMR spectroscopy and UV-VIS spectrometry. The chalcogenobarbiturates radiolabeled with /sup 123m/Te or /sup 77/Se may be useful as brain imaging agents. 31 references, 4 tables.

  12. Amplitude analyses of D{sup 0}→π{sup +}π{sup −}π{sup +}π{sup −} and D{sup 0}→K{sup +}K{sup −}π{sup +}π{sup −} decays

    Energy Technology Data Exchange (ETDEWEB)

    D’Argent, P. [Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg,Heidelberg (Germany); Skidmore, N.; Benton, J.; Dalseno, J. [H.H. Wills Physics Laboratory, University of Bristol,Bristol (United Kingdom); Gersabeck, E. [Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg,Heidelberg (Germany); Harnew, S.T.; Naik, P.; Prouve, C.; Rademacker, J. [H.H. Wills Physics Laboratory, University of Bristol,Bristol (United Kingdom)

    2017-05-29

    The resonant substructure of D{sup 0}→π{sup +}π{sup −}π{sup +}π{sup −} decays is studied using data collected by the CLEO-c detector. An amplitude analysis is performed in order to disentangle the various intermediate state contributions. To limit the model complexity a data driven regularization procedure is applied. The prominent contributions are the decay modes D{sup 0}→a{sub 1}(1260){sup +} π{sup −}, D{sup 0}→σ f{sub 0}(1370) and D{sup 0}→ρ(770){sup 0} ρ(770){sup 0}. The broad resonances a{sub 1}(1260){sup +}, π(1300){sup +} and a{sub 1}(1640){sup +} are studied in detail, including quasi-model-independent parametrizations of their lineshapes. The mass and width of the a{sub 1}(1260){sup +} meson are determined to be m{sub a{sub 1(1260){sup +}}}=[1225±9 (stat)±17 (syst)±10 (model)] MeV/c{sup 2} and Γ{sub a{sub 1(1260){sup +}}}=[430±24 (stat)±25 (syst)±18 (model)] MeV. The amplitude model of D{sup 0}→K{sup +}K{sup −}π{sup +}π{sup −} decays obtained from CLEO II.V, CLEO III, and CLEO-c data is revisited with improved lineshape parametrizations. The largest components are the decay modes D{sup 0}→ϕ(1020)ρ(770){sup 0}, D{sup 0}→K{sub 1}(1270){sup +}K{sup −} and D{sup 0}→K(1400){sup +}K{sup −}. The fractional C P-even content of the decay D{sup 0}→π{sup +}π{sup −}π{sup +}π{sup −} is calculated from the amplitude model to be F{sub +}{sup 4π}=[72.9±0.9 (stat)±1.5 (syst)±1.0 (model)] %, consistent with that obtained from a previous model-independent measurement. For D{sup 0}→K{sup +}K{sup −}π{sup +}π{sup −} decays, the C P-even fraction is measured for the first time and found to be F{sub +}{sup KKππ}=[75.3±1.8 (stat)±3.3 (syst)±3.5 (model)] %. The global decay rate asymmetries between D{sup 0} and D̄{sup 0} decays are measured to be A{sub CP}{sup 4π}=[+0.54±1.04 (stat)±0.51 (syst)]% and A{sub CP}{sup KKππ}=[+1.84±1.74 (stat)±0.30 (syst)]%. A search for C P asymmetries

  13. Observation of the Decay B sup+- -> pi sup+- pi sup 0 , study of B sup+- -> K sup+- pi sup 0 , and search for B sup 0 -> pi sup 0 pi sup 0

    CERN Document Server

    Roodman, A

    2003-01-01

    The present results for the branching fractions and charge asymmetries in B sup+- -> h sup+- pi sup 0 (where h sup+- = pi sup+-, K sup+-) and a search for the decay B sup 0 -> pi sup 0 pi sup 0 using a sample of approximately 88 million B(bar B) pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factor at SLAC. They measure BETA(B sup+- -> pi sup+- pi sup 0) = (5.5 sub - sub 0 sub . sub 9 sup + sup 1 sup . sup 0 +- 0.6) x 10 sup - sup 6 , where the first error is statistical and the second is systematic. The B sup+- -> pi sup+- pi sup 0 signal has a significance of 7.7 sigma including systematic uncertainties. The simultaneously measure the K sup+- pi sup 0 branching fraction to be BETA(B sup+- -> K sup+- pi sup 0) = (12.8 sub - sub 1 sub . sub 1 sup + sup 1 sup . sup 2 +- 1.0) x 10 sup - sup 6. The charge asymmetries are ALPHA subpi subsup sub+- sub ) subpi subsup 0 = -0.03 sub - sub 0 sub . sub 1 sub 7 sup + sup 0 sup . sup 1 sup 8 +- 0.02 and ALPHA subKappa subsup sub+- sub ) subpi sub...

  14. High-spin structure of the neutron-rich odd-odd sup 1 sup 0 sup 6 sup , sup 1 sup 0 sup 8 sub 4 sub 5 Rh and sup 1 sup 1 sup 0 sup , sup 1 sup 1 sup 2 sub 4 sub 7 Ag isotopes

    CERN Document Server

    Porquet, M G; Deloncle, I; Wilson, A; Venkova, T; Petkov, P; Kutsarova, T; Astier, A; Buforn, N; Meyer, M; Redon, N; Duprat, J; Gall, B J P; Hoellinger, F; Schulz, N; Gautherin, C; Lucas, R; Gueorguieva, E; Minkova, A; Sergolle, H

    2002-01-01

    The sup 1 sup 0 sup 6 sup , sup 1 sup 0 sup 8 Rh and sup 1 sup 1 sup 0 sup , sup 1 sup 1 sup 2 Ag nuclei have been produced as fission fragments following the fusion reaction sup 2 sup 8 Si+ sup 1 sup 7 sup 6 Yb at 145 MeV bombarding energy and studied with the Eurogam2 array. The yrast high-spin states of these four odd-odd nuclei, which are observed for the first time, consist of rotational bands in which the odd proton occupies the pi g sub 9 sub / sub 2 subshell and the odd neutron the nu h sub 1 sub 1 sub / sub 2 subshell. Their behaviour as a function of spin values does not vary with the number of neutrons: as observed in the odd-N neighbouring nuclei, the motion of the odd neutron remains decoupled from the motion of the core, from N=61 to N=65. Moreover, the staggering observed in the yrast bands of odd-odd isotopes is strongly reduced as compared to the large values displayed by the rotational bands built on the pi g sub 9 sub / sub 2 subshell in the odd-A Rh and Ag isotopes. The results of particle...

  15. Study of B<sup>±,0sup> → J/ψ K<sup>+> K<sup>–K>±,0sup> and search for B<sup>0sup> → J/ψΦ at Babar

    Energy Technology Data Exchange (ETDEWEB)

    Lees, J. P. [Univ. de Savoie, CNRS/IN2P3, Annecy-Le-Vieux (France). et al.

    2015-01-07

    We study the rare B meson decays B<sup>±,0sup> → J/ψK<sup>+KK>±,0sup>, B<sup>±,0sup> → J/ψΦK<sup>±,0sup>, and search for B<sup>0sup> → J/ψΦ, using 469 million BB¯ events collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e<sup>+e–> asymmetric energy collider. We present new measurements of branching fractions and a study of the J/ψΦ mass distribution in search of new charmonium-like states. In addition, we search for the decay B<sup>0sup> → J/ψΦ and find no evidence of a signal.

  16. Syntheses, crystal structures, and characterization of two new Tl{sup +}-Cu{sup 2+}-Te{sup 6+} oxides: Tl{sub 4}CuTeO{sub 6} and Tl{sub 6}CuTe{sub 2}O{sub 10}

    Energy Technology Data Exchange (ETDEWEB)

    Yeon, Jeongho; Kim, Sang-Hwan [Department of Chemistry, University of Houston, 136 Fleming Building, Houston, TX 77204-5003 (United States); Green, Mark A. [Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742-2115 and NIST Center for Neutron Research, National Institute of Standard and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-6103 (United States); Bhatti, Kanwal Preet; Leighton, C. [Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455-0132 (United States); Shiv Halasyamani, P., E-mail: psh@uh.edu [Department of Chemistry, University of Houston, 136 Fleming Building, Houston, TX 77204-5003 (United States)

    2012-12-15

    Crystals and polycrystalline powders of two new oxide materials, Tl{sub 4}CuTeO{sub 6} and Tl{sub 6}CuTe{sub 2}O{sub 10}, have been synthesized by hydrothermal and solid-state methods. The materials were structurally characterized by single-crystal X-ray diffraction. Tl{sub 4}CuTeO{sub 6} and Tl{sub 6}CuTe{sub 2}O{sub 10} exhibit one dimensional anionic slabs of [CuTeO{sub 6}]{sup 4-} and [CuTe{sub 2}O{sub 10}]{sup 6-}, respectively. Common to both slabs is the occurrence of Cu{sup 2+}O{sub 4} distorted squares and Te{sup 6+}O{sub 6} octahedra. The slabs are separated by Tl{sup +} cations. For Tl{sub 4}CuTeO{sub 6}, magnetic measurements indicate a maximum at {approx}8 K in the temperature dependence of the susceptibility. Low temperature neutron diffraction data confirm no long-range magnetic ordering occurs and the susceptibility was adequately accounted for by fits to a Heisenberg alternating chain model. For Tl{sub 6}CuTe{sub 2}O{sub 10} on the other hand, magnetic measurements revealed paramagnetism with no evidence of long-range magnetic ordering. Infrared, UV-vis spectra, thermogravimetric, and differential thermal analyses are also reported. Crystal data: Tl{sub 4}CuTeO{sub 6}, Triclinic, space group P-1 (No. 2), a=5.8629(8) A, b=8.7848(11) A, c=9.2572(12) A, {alpha}=66.0460(10), {beta}=74.2010(10), {gamma}=79.254(2), V=417.70(9) A{sup 3}, and Z=2; Tl{sub 6}CuTe{sub 2}O{sub 10}, orthorhombic, space group Pnma (No. 62), a=10.8628(6) A, b=11.4962(7) A, c=10.7238(6) A, V=1339.20(13) A{sup 3}, and Z=4. - Graphical Abstract: Two new oxide materials, Tl{sub 4}CuTeO{sub 6} and Tl{sub 6}CuTe{sub 2}O{sub 10}, have been synthesized and characterized. The materials exhibit one dimensional crystal structures consisting of CuO{sub 4} and TeO{sub 6} polyhedra. Highlights: Black-Right-Pointing-Pointer Two New Tl-Te-Cu-oxides have been synthesized and structurally characterized. Black-Right-Pointing-Pointer For Tl{sub 4}CuTeO{sub 6}, magnetic measurements indicate a

  17. Study of sup 1 sup 9 sup 4 Tl sup g decay

    CERN Document Server

    Sudarshan, K; Tripathi, R; Goswami, A; Tomar, B S; Reddy, A V R

    2003-01-01

    Absolute gamma ray intensities in the decay of sup 1 sup 9 sup 4 Tl sup g have been measured following the radiochemical separation of sup 1 sup 9 sup 4 Pb produced in the reaction of sup 1 sup 9 F + sup 1 sup 8 sup 1 Ta. The (EC+beta sup +) branching ratios in the decay of sup 1 sup 9 sup 4 Tl sup g to various levels of sup 1 sup 9 sup 4 Hg were deduced. Three new levels are introduced in the decay scheme. A precise value of half life of sup 1 sup 9 sup 4 Pb (10.0+-0.4 min) is reported.

  18. A Measurement of the Branching Fractions and CP Asymmetries of the Decays B<sup>±> → K<sup>*±π>0sup> and B<sup>±> → ρ<sup>±π>0sup> at BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Gaillard, James Robert [Imperial College, London (United Kingdom)

    2005-07-01

    Measurements of the branching fractions (average over charge-conjugate decays), B, and CP violating asymmetries, ACP, of the decays B± → K<sup>*±π>0sup> and B<sup>±> → ρ<sup>±π>0sup> are presented.

  19. Effective field theory analysis of new physics in e{sup +}e{sup -}{yields}W{sup +}W{sup -} at a linear collider

    Energy Technology Data Exchange (ETDEWEB)

    Buchalla, G.; Cata, O.; Rahn, R. [Muenchen Univ. (Germany). Fakultaet fuer Physik; Schlaffer, M. [Muenchen Univ. (Germany). Fakultaet fuer Physik; Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2013-02-15

    We analyze new physics contributions to e{sup +}e{sup -}{yields}W{sup +}W{sup -} at the TeV energy scale, employing an effective field theory framework. A complete basis of next-to-leading order operators in the standard model effective Lagrangian is used, both for the nonlinear and the linear realization of the electroweak sector. The elimination of redundant operators via equations-of-motion constraints is discussed in detail. Polarized cross sections for e{sup +}e{sup -}{yields}W{sup +}W{sup -} (on-shell) are computed and the corrections to the standard model results are given in an expansion for large s/M{sup 2}{sub W}. The dominant relative corrections grow with s and can be fully expressed in terms of modified gauge-fermion couplings. These corrections are interpreted in the context of the Goldstone boson equivalence theorem. Explicit new physics models are considered to illustrate the generation and the potential size of the coefficients in the effective Lagrangian. Brief comments are made on the production of W{sup +}W{sup -} pairs at the LHC.

  20. Excitation function measurements of sup 4 sup 0 Ar(p,3n) sup 3 sup 8 K, sup 4 sup 0 Ar(p,2pn) sup 3 sup 8 Cl and sup 4 sup 0 Ar(p,2p) sup 3 sup 9 Cl reactions

    CERN Document Server

    Nagatsu, K; Suzuki, K

    1999-01-01

    For the production of sup 3 sup 8 K, excitation functions of the sup 4 sup 0 Ar(p,3n) sup 3 sup 8 K reaction and its accompanying reactions sup 4 sup 0 Ar(p,2pn) sup 3 sup 8 Cl, and sup 4 sup 0 Ar(p,2p) sup 3 sup 9 Cl were measured at the proton energy of 20.5-39.5 MeV to determine the optimum conditions of irradiation. Target cells containing argon gas were prepared using specially developed tools in an argon-replaced glove box. In the sup 4 sup 0 Ar(p,3n) sup 3 sup 8 K, sup 4 sup 0 Ar(p,2pn) sup 3 sup 8 Cl, and sup 4 sup 0 Ar(p,2p) sup 3 sup 9 Cl reactions, the maximum cross sections were 6.7+-0.7, 34+-3.3 and 11+-1.2mbarn at 37.6, 39.5 and 32.0 MeV, respectively, and the saturation thick target yields were calculated to be 560, 2200, and 1300 sup * MBq/mu A, respectively, at an incident energy of 39.5 MeV ( sup * integral yield above 21 MeV).

  1. Measurement of the D{sub s}{sup +}-D{sub s}{sup -} production asymmetry in 7 TeV pp collisions

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adametz, A. [Physikalisches Institut, Ruprecht-Karls-Universitaet Heidelberg, Heidelberg (Germany); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); and others

    2012-07-09

    Heavy quark production in 7 TeV centre-of-mass energy pp collisions at the LHC is not necessarily flavour symmetric. The production asymmetry, A{sub P}, between D{sub s}{sup +} and D{sub s}{sup -} mesons is studied using the {phi}{pi}{sup {+-}} decay mode in a data sample of 1.0 fb{sup -1} collected with the LHCb detector. The difference between {pi}{sup +} and {pi}{sup -} detection efficiencies is determined using the ratios of fully reconstructed to partially reconstructed D{sup Low-Asterisk {+-}} decays. The overall production asymmetry in the D{sub s}{sup {+-}} rapidity region 2.0 to 4.5 with transverse momentum larger than 2 GeV is measured to be A{sub P}=(-0.33{+-}0.22{+-}0.10)%. This result can constrain models of heavy flavour production.

  2. Measurement of D<sup>0sup> - $\\bar{D}$<sup>0sup> Mixing With a Time-Dependent Amplitude Analysis of D<sup>0sup> → K<sup>+ sup>π-> π<sup>0sup>

    Energy Technology Data Exchange (ETDEWEB)

    Pelliccioni, Mario [University of Turin, Torino (Italy)

    2013-06-10

    Flavor mixing of neutral mesons is a long and well known phenomenon in particle physics. Experimental evidence of mixing of the neutral kaon was obtained in 1956, followed in 1987 by the evidence of Bd mixing. In 1974, A. Pais and S. B. Treiman firstly introduced the idea of charm mixing and CP violation. Even though many searches were conducted over time, it was clear that the small scale at which both amplitude and frequency of the oscillation took place made any possible observation challenging. In 2007, both the BABAR and Belle experiments announced the first evidence of mixing in the charm sector. The analyses concerned the study of a two body decay of the D<sup>0sup> meson. Few months later, BABAR presented the analysis of the decay D<sup>0sup> → K<sup>+π-π>0sup> . This is the main topic of this thesis.

  3. Z/sub 1/ dependence of ion-induced electron emission from aluminum. [H/sup +/,H/sub 2//sup +/,D/sup +/,D/sub 2//sup +/,He/sup +/,B/sup +/,C/sup +/,N/sup +/,N/sub 2//sup +/,O/sup +/,O/sub 2//sup +/,F/sup +/,Ne/sup +/,S/sup +/,Cl/sup +/,Ar/sup +/,Kr/sup +/, and Xe/sup +/, 1. 2-50 keV

    Energy Technology Data Exchange (ETDEWEB)

    Alonso, E.V.; Baragiola, R.A.; Ferron, J.; Jakas, M.M.; Oliva-Florio, A.

    1980-07-01

    We have measured the electron emission yields ..gamma.. of clean aluminum under bombardment with H/sup +/, H/sub 2/ /sup +/, D/sup +/, D/sub 2/ /sup +/, He/sup +/, B/sup +/, C/sup +/, N/sup +/, N/sub 2/ /sup +/, O/sup +/, O/sub 2/ /sup +/, F/sup +/, Ne/sup +/, S/sup +/, Cl/sup +/, Ar/sup +/, Kr/sup +/, and Xe/sup +/ in the energy range 1.2--50 keV. The clean surfaces were prepared by in situ evaporation of high-purity Al under ultra-high-vacuum conditions. It is found that kinetic electron emission yields ..gamma../sub k/, obtained after subtracting from the measured ..gamma.. a contribution due to potential emission, are roughly proportional to the electronic stopping powers, for projectiles lighter than Al. For heavier projectiles there is a sizable contribution to electron emission from collisions involving rapidly recoiling target atoms, which increases with the mass of the projectile, and which dominates the threshold and near-threshold behavior of kinetic emission. The results, together with recently reported data on Auger electron emission from ion-bombarded Al show that the mechanism proposed by Parilis and Kishinevskii of inner-shell excitation and subsequent Auger decay is negligible for light ions and probably small for heavy ions on Al and in our energy range. We thus conclude that kinetic electron emission under bombardment by low-energy ions results mainly from the escape of excited valence electrons.

  4. Investigation of the sup 9 sup 3 Nb neutron cross-sections in resonance energy range

    CERN Document Server

    Grigoriev, Y V; Faikov-Stanchik, H; Ilchev, G; Kim, G N; Kitaev, V Ya; Mezentseva, Z V; Panteleev, T; Sinitsa, V V; Zhuravlev, B V

    2001-01-01

    The results of gamma-ray multiplicity spectra and transmission measurements for sup 9 sup 3 Nb in energy range 21.5 eV-100 keV are presented. Gamma spectra from 1 to 7 multiplicity were measured on the 501 m and 121 m flight paths of the IBR-30 using a 16-section scintillation detector with a NaI(Tl) crystals of a total volume of 36 l and a 16-section liquid scintillation detector of a total volume of 80 l for metallic samples of 50, 80 mm in diameter and 1, 1.5 mm thickness with 100% sup 9 sup 3 Nb. Besides, the total and scattering cross-section of sup 9 sup 3 Nb were measured by means batteries of B-10 and He-3 counters on the 124 m, 504 m and 1006 m flight paths of the IBR-30. Spectra of multiplicity distribution were obtained for resolved resonances in the energy region E=30-6000 eV and for energy groups in the energy region E=21.5 eV- 100 keV. They were used for determination of the average multiplicity, resonance parameters and capture cross-section in energy groups and for low-laying resonances of sup...

  5. Investigating the Hydrolysis Reactions of a Chemical Warfare Agent Surrogate. A Systematic Study using <sup>1sup>H, <sup>13sup>C, <sup>17sup>O, <sup>19sup>F, <sup>31sup>P, and <sup>35sup>Cl NMR Spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Alam, Todd M. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Wilson, Brendan W. [West Virginia Univ., Morgantown, WV (United States)

    2015-07-24

    During the summer of 2015, I participated in the DHS HS-STEM fellowship at Sandia National Laboratories (SNL, NM) under the supervision of Dr. Todd M. Alam in his Nuclear Magnetic Resonance (NMR) Spectroscopy research group. While with the group, my main project involved pursing various hydrolysis reactions with Diethyl Chlorophosphate (DECP), a surrogate for the agent Sarin (GB). Specifically, I performed different hydrolysis reactions, monitored and tracked the different phosphorous containing species using phosphorous (<sup>31sup>P) NMR spectroscopy. With the data collected, I performed kinetics studies mapping the rates of DECP hydrolysis. I also used the NMR of different nuclei such as <sup>1sup>H, <sup>13sup>C, <sup>17sup>O, and <sup>35sup>Cl to help understand the complexity of the reactions that take place. Finally, my last task at SNL was to work with Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) NMR Spectroscopy optimizing conditions for <sup>19sup>F- <sup>31sup>P filtering NMR experiments.

  6. Search for the decay B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -} with the ATLAS detector

    Energy Technology Data Exchange (ETDEWEB)

    Aad, G. [Fakultaet fuer Mathematik und Physik, Albert-Ludwigs-Universitaet, Freiburg i.Br. (Germany); Abbott, B. [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK (United States); Abdallah, J. [Institut de Fisica d' Altes Energies and Departament de Fisica de la Universitat Autonoma de Barcelona and ICREA, Barcelona (Spain); Abdel Khalek, S. [LAL, Universite Paris-Sud and CNRS/IN2P3, Orsay (France); Abdelalim, A.A. [Section de Physique, Universite de Geneve, Geneva (Switzerland); Abdinov, O. [Institute of Physics, Azerbaijan Academy of Sciences, Baku (Azerbaijan); Abi, B. [Department of Physics, Oklahoma State University, Stillwater, OK (United States); Abolins, M. [Department of Physics and Astronomy, Michigan State University, East Lansing, MI (United States); AbouZeid, O.S. [Department of Physics, University of Toronto, Toronto, ON (Canada); Abramowicz, H. [Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv (Israel); Abreu, H. [DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l' Univers), CEA Saclay (Commissariat a l' Energie Atomique), Gif-sur-Yvette (France); Acerbi, E. [INFN Sezione di Milano (Italy); Dipartimento di Fisica, Universita di Milano, Milano (Italy); Acharya, B.S. [INFN Gruppo Collegato di Udine (Italy); ICTP, Trieste (Italy); Adamczyk, L. [AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow (Poland); Adams, D.L. [Physics Department, Brookhaven National Laboratory, Upton, NY (United States); Addy, T.N. [Department of Physics, Hampton University, Hampton, VA (United States); and others

    2012-07-18

    A blind analysis searching for the decay B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -} has been performed using proton-proton collisions at a centre-of-mass energy of 7 TeV recorded with the ATLAS detector at the LHC. With an integrated luminosity of 2.4 fb{sup -1} no excess of events over the background expectation is found and an upper limit is set on the branching fraction BR(B{sub s}{sup 0}{yields}{mu}{sup +}{mu}{sup -})<2.2(1.9) Multiplication-Sign 10{sup -8} at 95% (90%) confidence level.

  7. Observation of the suppressed ADS modes B{sup ±}→[π{sup ±}K{sup ∓}π{sup +}π{sup −}]{sub D}K{sup ±} and B{sup ±}→[π{sup ±}K{sup ∓}π{sup +}π{sup −}]{sub D}π{sup ±}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2013-06-10

    An analysis of B{sup ±}→DK{sup ±} and B{sup ±}→Dπ{sup ±} decays is presented where the D meson is reconstructed in the four-body final state K{sup ±}π{sup ∓}π{sup +}π{sup −}. Using LHCb data corresponding to an integrated luminosity of 1.0fb{sup −1}, first observations are made of the suppressed ADS modes B{sup ±}→[π{sup ±}K{sup ∓}π{sup +}π{sup −}]{sub D}K{sup ±} and B{sup ±}→[π{sup ±}K{sup ∓}π{sup +}π{sup −}]{sub D}π{sup ±} with a significance of 5.1σ and greater than 10σ, respectively. Measurements of CP asymmetries and CP-conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured B{sup ±}→DK{sup ±} amplitudes is determined to be r{sub B}{sup K}=0.097±0.011.

  8. First evidence for triaxial superdeformation in sup 1 sup 6 sup 1 Lu and sup 1 sup 6 sup 2 Lu

    CERN Document Server

    Bringel, P; Domscheit, J; Neusser, A; Schoenwasser, G; Singh, A K; Amro, H; Axiotis, M; Kröll, T; Napoli, D R; Bazzacco, D; Lunardi, S; Ur, C; Bhattacharya, S; Bhowmik, R; Hagemann, G B; Jensen, D R; Pancholi, S C; Petrache, C M

    2003-01-01

    High-spin states in sup 1 sup 6 sup 1 Lu and sup 1 sup 6 sup 2 Lu have been investigated using the GASP gamma-ray spectrometer array. Excited states in these nuclei have been populated through the sup 1 sup 0 sup 0 Mo( sup 6 sup 5 Cu, xn) reaction at a beam energy of 260 MeV. Four presumably triaxial superdeformed bands, three in sup 1 sup 6 sup 2 Lu and one in sup 1 sup 6 sup 1 Lu, have been observed. This is the first evidence for triaxial superdeformation in the two isotopes. (orig.)

  9. First observation of the B$0\\atop{s}$→K<sup>+K-> decay mode, and measurement of the B<sup>0sup> and $0\\atop{s}$ mesons decay-rates into two-body charmless final states at CDF

    Energy Technology Data Exchange (ETDEWEB)

    Tonelli, Diego [Scuola Normale Superiore di Pisa (SNS) (Italy)

    2006-11-30

    The authors searched for decays of the type B$0\\atop{s}$→ h<sup>+h'-> (where h, h' = K or π) in a sample corresponding to 180 pb<sup>-1sup> of p$\\bar{p}$ collisions at √s = 1.96 TeV, collected by the upgraded Collider Detector at the Fermilab Tevatron. A total signal of approximately 900 events was reconstructed, and the relative branching fractions (β) of each decay mode were determined with a likelihood fit.

  10. Observation of π- B meson charge-flavor correlations and measurement of time dependent B<sup>0sup>$\\bar{B}$>0sup> mixing in p$\\bar{p}$ collisions

    Energy Technology Data Exchange (ETDEWEB)

    Maksimovic, Peter [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

    1998-02-01

    We present a study of time dependent B<sup>0sup>-$\\bar{B}$>0sup> mixing in p$\\bar{p}$ collisions at 1.8 TeV using 110 pb<sup>-1sup> collected with the CDF detector at the Fermilab Tevatron Collider. B mesons are partially reconstructed using the semileptonic decays B<sup>0sup>→l+D*->X and B<sup>+→l+$\\bar{D}$>0sup>X (and their charge conjugates). B meson-charged pion correlations are used in order to determine the flavor of the B meson at t=0. Such correlations are expected to arise from pions produced in the fragmentation chain and also from B** decays. We measure the efficiency and purity of this flavor tagging method for both charged and neutral B mesons.

  11. Probes for narcotic receptor mediated phenomena 22. Pt.1: Synthesis and characterization of optically pure [{sup 3}H](+)-4-[({alpha}R)-{alpha}-((2S,5R)-4-propyl-2,5-dimethyl-1-pi perazinyl)-3-methoxybenzyl]-N,N-diethylbenzamide, [{sup 3}H]SNC 121, a novel high affinity and selective ligand for delta opioid receptors

    Energy Technology Data Exchange (ETDEWEB)

    Calderon, S.N.; Bertha, C.M.; Rice, K.C. [National Inst. of Diabetes and Digestive and Kidney Diseases, Medicinal Chemistry Lab., Bethesda, MD (United States); Gutkind, J.S. [National Inst. of Dental Research, Bethesda, MD (United States); Heng Xu; Partilla, J.S.; Rothman, R.B. [National Inst. on Drug Abuse, Clinical Psychopharmacology Section, Baltimore, MD (United States)

    1996-09-01

    The synthesis of unlabelled and labelled SNC 121, a selective nonpeptide ligand for the delta opioid receptor is reported. [{sup 3}H]SNC 121 of specific activity of 26.8 Ci/mmol, was synthesized by catalytic tritiation of the optically pure precursor SNC 80. (author).

  12. Moessbauer study of supertransferred hyperfine field of /sup 119/Sn (Sn/sup 4 +/) in Casub(1-x)Srsub(x)MnO/sub 3/

    Energy Technology Data Exchange (ETDEWEB)

    Takano, M [Konan Univ., Kobe (Japan). Faculty of Science; Takeda, Y; Shimada, M; Matsuzawa, T; Shinjo, T

    1975-09-01

    Casub(1-x)Srsub(x)Mnsub(0.99)Snsub(0.01)O/sub 3/(0<=x<=1) with (nearly) cubic perovskite structures were prepared and the magnetic hyperfine fields of /sup 119/Sn (Sn/sup 4 +/) were measured by the Moessbauer effect. The hyperfine fields arise from unpaired s electron spin densities transferred from Mn/sup 4 +/ ions (supertransferred hyperfine interaction). The hyperfine field for a tin ion was found to depend linearly upon the numbers of Ca/sup 2 +/ and Sr/sup 2 +/ ions in the neighboring divalent cation sites, with proportional coefficients having opposite signs. To explain experimental results two kinds of spin transfer processes contributing to the hyperfine field oppositely to each other have been considered, and spin transfer via a divalent cation is emphasized particularly. The hyperfine field at 0 K for Sn/sup 4 +/ in CaMnO/sub 3/ is -75 kOe, while +20 kOe for Sn/sup 4 +/ in SrMnO/sub 3/.

  13. Measurement of the B{sub s}{sup 0}-B{sup Macron }{sub s}{sup 0} oscillation frequency {Delta}m{sub s} in B{sub s}{sup 0}{yields}D{sub s}{sup -}(3){pi} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); Archilli, F. [Laboratori Nazionali dell' INFN di Frascati, Frascati (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Arrabito, L. [CC-IN2P3, CNRS/IN2P3, Lyon-Villeurbanne (France); Artamonov, A. [Institute for High Energy Physics (IHEP), Protvino (Russian Federation); and others

    2012-03-19

    The B{sub s}{sup 0}-B{sup Macron }{sub s}{sup 0} oscillation frequency {Delta}m{sub s} is measured with 36 pb{sup -1} of data collected in pp collisions at {radical}(s)=7 TeV by the LHCb experiment at the Large Hadron Collider. A total of 1381 B{sub s}{sup 0}{yields}D{sub s}{sup -}{pi}{sup +} and B{sub s}{sup 0}{yields}D{sub s}{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +} signal decays are reconstructed, with average decay time resolutions of 44 fs and 36 fs, respectively. An oscillation signal with a statistical significance of 4.6{sigma} is observed. The measured oscillation frequency is {Delta}m{sub s}=17.63{+-}0.11(stat){+-}0.02(syst) ps{sup -1}.

  14. A precision measurement of the Z<sup>0sup> lineshape parameters for the process Z<sup>0sup> → τ<sup>+τ->

    Energy Technology Data Exchange (ETDEWEB)

    Lahmann, Robert [Univ. of Maryland, College Park, MD (United States)

    1996-01-01

    In this dissertation, a measurement of the partial decay width of the process Z<sup>0sup> → τ<sup>+τ-> using data collected during 1993 and 1994 at the OPAL detector at CERN is described. The cross sections of this process at three center-of-mass energies near the Z<sup>0sup> resonance were determined, and from a fit to those cross sections, the mass of the Z<sup>0sup>, its total decay width and its partial decay width into τ<sup>+τ-> final states were determined as MZ = 91.183 ± 0.020 GeV, Γtot = 2.514 ± 0.018 GeV and Γττ = 84.54 ± 0.59 MeV. Using published results for MZ, and Γtot with higher accuracy, a value for the partial decay width of Γττ = 84.02 ± 0.20 MeV was obtained. Further using published results for the decay width of the Z<sup>0sup> into quark pair final states, the invisible decay width of the Z<sup>0sup> was determined as Γinv = 496.9 ± 4.1 MeV, and the number of neutrino generations was determined as Nv = 2.974 ± 0.025(exp) ± 0.007 (mtop, MHiggs). All results were found to be in good agreement with the Standard Model predictions and were consistent with the assumption of lepton universality within the Standard Model framework.

  15. Measurement of the charge asymmetry in B{sup ±}→ϕK{sup ±} and search for B{sup ±}→ϕπ{sup ±} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2014-01-20

    The CP-violating charge asymmetry in B{sup ±}→ϕK{sup ±} decays is measured in a sample of pp collisions at 7 TeV centre-of-mass energy, corresponding to an integrated luminosity of 1.0 fb{sup −1} collected by the LHCb experiment. The result is A{sub CP}(B{sup ±}→ϕK{sup ±})=0.022±0.021±0.009, where the first uncertainty is statistical and the second systematic. In addition, a search for the B{sup ±}→ϕπ{sup ±} decay mode is performed, using the B{sup ±}→ϕK{sup ±} decay rate for normalization. An upper limit on the branching fraction B(B{sup ±}→ϕπ{sup ±})<1.5×10{sup −7} is set at 90% confidence level.

  16. Measurement of branching ratios and CP asymmetries for the decays B{sup 0}{yields}{pi}{sup +}{pi}{sup -}, B{sup 0}{yields}K{sup +}{pi}{sup -}, B{sup 0}{yields}K{sup +}K{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Prothmann, Kolja Andreas

    2013-01-30

    We present measurements of the branching fractions and CP violation parameters for the decay channels B{sup 0}{yields}{pi}{sup +}{pi}{sup -}, B{sup 0}{yields}K{sup +}{pi}{sup -} and B{sup 0}{yields}K{sup +}K{sup -}. The final Belle dataset of 772 million B anti B pairs produced at the {Upsilon}(4S) resonance at the KEKB asymmetric-energy e{sup +}e{sup -} collider is used. For the branching fractions, we obtain B(B{sup 0}{yields}{pi}{sup +}{pi}{sup -})=(5.63{+-} 0.16(stat){+-} 0.16(syst)) x 10{sup -6}, B(B{sup 0}{yields}K{sup {+-}}{pi}{sup -+})=(18.71{+-}0.25(stat){+-} 0.37(syst)) x 10{sup -6}, B(B{sup 0}{yields}K{sup +}K{sup -})<14 x 10{sup -8} at 90% CL. For the CP-asymmetries, we obtain following values: A{sub CP}(B{sup 0}{yields}{pi}{sup +}{pi}{sup -})=0.33{+-}0.06(stat){+-}0.03 (syst), S{sub CP}(B{sup 0}{yields}{pi}{sup +}{pi}{sup -})=-0.64{+-}0.08(stat){+-}0.03(syst), A{sub CP}(B{sup 0}{yields}K{sup {+-}}K{sup -+})=-0.061{+-}0.014(stat){+-}0.008 (syst), where A{sub CP} and S{sub CP} represent direct and mixing-induced CP violation, respectively. For the CP-violating weak phase {phi}{sub 2} we exclude the region 23.8 <{phi}{sub 2}<66.8 at the 1{sigma} level. A model independent test of new physics using a sum rule in the K{pi} system yields a mild deviation from the standard model of -0.289{+-}0.139(stat){+-}0.064(syst) with a 1.9{sigma} significance.

  17. Evaluation of proton induced reactions on sup 1 sup 0 sup 0 Mo. New cross sections for production of sup 9 sup 9 sup m Tc and sup 9 sup 9 Mo

    CERN Document Server

    Takács, S; Tarkanyi, F; Hermanne, A; Sonck, M

    2003-01-01

    The use of the sup 9 sup 9 Mo -> sup 9 sup 9 sup m Tc generator in nuclear medicine is well established world wide. The production of the sup 9 sup 9 Mo (T sub 1 sub / sub 2 = 66 h) parent as a fission product of sup 2 sup 3 sup 5 U is largely based on the use of reactor technology. From the early 1990's accelerator based production methods to provide either direct produced sup 9 sup 9 sup m Tc or the parent sup 9 sup 9 Mo, were studied and suggested as potential alternatives to the reactor based production of sup 9 sup 9 Mo. A possible pathway for the charged particle production of sup 9 sup 9 sup m Tc and sup 9 sup 9 Mo is irradiation of molybdenum metal with protons via the reaction sup 1 sup 0 sup 0 Mo(p,2n) sup 9 sup 9 sup m Tc and sup 1 sup 0 sup 0 Mo(p,pn) sup 9 sup 9 Mo, respectively. The earlier published excitation functions show large differences in their maximum that result in large differences in the calculated yields. Study the excitation function for these proton-induced reactions was decided. ...

  18. TeV gravity and Kaluza-Klein excitations in e{sup +}e{sup {minus}} and e{sup {minus}}e{sup {minus}} collisions

    Energy Technology Data Exchange (ETDEWEB)

    Rizzo, T.G.

    2000-01-24

    The authors review the capability of e{sup +}e{sup {minus}} and e{sup {minus}}e{sup {minus}} colliders to detect the virtual exchange of Kaluza-Klein towers of gravitons within the large extra dimension scenario of Arkani-Hamed, Dimopoulos and Dvali and in the localized gravity model of Randall and Sundrum with non-factorizable geometry.

  19. Moeller scattering polarimetry for high energy e sup + e sup - linear colliders

    CERN Document Server

    Alexander, G

    2002-01-01

    The general features of the Moeller scattering and its use as an electron polarimeter are described and studied in view of the planned future high energy e sup + e sup - linear colliders. In particular the study concentrates on the TESLA collider which is planned to operate with longitudinal polarised beams at a centre of mass energy of the order of 0.5 TeV with a luminosity of 3.4x10 sup 3 sup 4 cm sup - sup 2 s sup - sup 1.

  20. MIBI-{sup 99m}Tc mammary scintigraphy; Centellografia mamaria con MIBI-{sup 99m}Tc

    Energy Technology Data Exchange (ETDEWEB)

    Mayosky, Maria C; Parma, Elvira P; Armesto, Amparo M; Zarlenga, Ana C [Instituto de Oncologia Angel H. Roffo, Buenos Aires (Argentina). Centro Oncologico de Medicina Nuclear; Cresta, Carlos; Azar, Maria E; Noblia, Cristina [Instituto de Oncologia Angel H. Roffo, Buenos Aires (Argentina). Servicio de Mastologia

    1999-07-01

    121 patients suspected of breast cancer were studied with MIBI-{sup 99m}Tc to evaluate the suitability of the mammary scintigraphy in patients with doubtful cancer diagnosis.The results show 93 % sensitivity and 95 % specificity and indicate the usefulness of this procedure to increase the accuracy of the diagnosis.

  1. Measurements of the S-wave fraction in B{sup 0}→K{sup +}π{sup −}μ{sup +}μ{sup −} decays and the B{sup 0}→K{sup ∗}(892){sup 0}μ{sup +}μ{sup −} differential branching fraction

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Collaboration: The LHCb collaboration; and others

    2016-11-08

    A measurement of the differential branching fraction of the decay B{sup 0}→K{sup ∗}(892){sup 0}μ{sup +}μ{sup −} is presented together with a determination of the S-wave fraction of the K{sup +}π{sup −} system in the decay B{sup 0}→K{sup +}π{sup −}μ{sup +}μ{sup −}. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb{sup −1} collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q{sup 2}. Precise theoretical predictions for the differential branching fraction of B{sup 0}→K{sup ∗}(892){sup 0}μ{sup +}μ{sup −} decays are available for the q{sup 2} region 1.1sup 2}<6.0 GeV{sup 2}/c{sup 4}. In this q{sup 2} region, for the K{sup +}π{sup −} invariant mass range 796sup 2}, the S-wave fraction of the K{sup +}π{sup −} system in B{sup 0}→K{sup +}π{sup −}μ{sup +}μ{sup −} decays is found to be F{sub S}=0.101±0.017(stat)±0.009(syst), and the differential branching fraction of B{sup 0}→K{sup ∗}(892){sup 0}μ{sup +}μ{sup −} decays is determined to be dB/dq{sup 2}=(0.392 {sub −0.019} {sup +0.020}(stat)±0.010(syst)±0.027(norm))×10{sup −7}c{sup 4}/GeV{sup 2}. The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.

  2. Measurement of the $\\bar{B}$<sup>0sup> → D<sup>*+ℓ->$\\bar{v}$ Branching Fraction with a Partial Reconstruction Technique

    Energy Technology Data Exchange (ETDEWEB)

    Sonnek, Peter [Univ. of Mississippi, Oxford, MS (United States)

    2009-08-01

    Presented is a precise measurement of the $\\bar{B}$<sup>0sup> → D*<sup>+ℓ->$\\bar{v}$ branching fraction using 81.47 fb<sup>-1sup> of data collected with the BABAR detector at the PEP-II e<sup>+e-> storage ring at the Stanford Linear Accelerator Center. The measurement was performed by partially reconstructing the D*<sup>+> meson from $\\bar{B}$<sup>0sup> → D*<sup>+->$\\bar{v}$ decays using only the soft pion of the D*<sup>+> → D<sup>0sup>π+> decay to reconstruct its four vector. The branching fraction was measured to be β($\\bar{B}$<sup>0sup> → D*<sup>+->$\\bar{v}$) = (4.91 ± 0.01stat ± 0.15syst)%.

  3. Measurements of B{sup 0} Decays to pi{sup +}pi{sup -}pi{sup 0}

    Energy Technology Data Exchange (ETDEWEB)

    Harrison, Paul F.

    2001-07-30

    We present preliminary results of searches for exclusive B{sup 0} decays to {pi}{sup +}{pi}{sup -} {pi}{sup 0} among 22.7 million b{bar b} pairs collected by the BABAR experiment from electron-positron collisions near the {Upsilon}(4S) resonance. We measure {Beta}(B{sup 0} {yields} {pi}{sup {+-}}) = (28.9 {+-} 5.4 {+-} 4.3) x 10{sup 6}, and find no evidence for the presence of any other decay mode in the {pi}{sup +}{pi}{sup -} {pi}{sup 0} Dalitz plot. Upper limits are determined for the branching fractions of B{sup 0} {yields} {sup 0}{pi}{sup 0}, non-resonant B{sup 0} decays to {pi}{sup +}{pi}{sup -} {pi}{sup 0} and of several discrete regions of {pi}{sup +}{pi}{sup -} {pi}{sup 0} phase-space. We also measure the direct CP-violating asymmetry between the rates of untagged {sup +}{pi}{sup -} and {sup -}{pi}{sup +}, finding no significant evidence for an effect.

  4. Level density and gamma-ray strength in sup 2 sup 7 sup , sup 2 sup 8 Si

    CERN Document Server

    Guttormsen, M; Rekstad, J; Siem, S; Schiller, A; Lönnroth, T; Voinov, A

    2003-01-01

    A method to extract simultaneously level densities and gamma-ray transmission coefficients has for the first time been tested on light nuclei utilizing the sup 2 sup 8 Si( sup 3 He,alpha gamma) sup 2 sup 7 Si and sup 2 sup 8 Si( sup 3 He, sup 3 He'gamma) sup 2 sup 8 Si reactions. The extracted level densities for sup 2 sup 7 Si and sup 2 sup 8 Si are consistent with the level densities obtained by counting known levels in the respective nuclei. The extracted gamma-ray strength in sup 2 sup 8 Si agrees well with the known gamma-decay properties of this nucleus. Typical nuclear temperatures are found to be T approx 2.4 MeV at around 7 MeV excitation energy. The entropy gap between nuclei with mass number A and A +- 1 is measured to be delta S approx 1.0 k sub B , which indicates an energy spacing between single-particle orbitals comparable with typical nuclear temperatures.

  5. A Study of the Rare Decays B sup 0 -> D sub s sup + pi sup - and B sup 0 -> D sub s sup - K sup +

    CERN Document Server

    Faccini, R

    2002-01-01

    The report evidence for the decays B sup 0 -> D sub s sup + pi sup - and B sup 0 -> D sub s sup - K sup + and the results of a search for B sup 0 -> D sub s sup + pi sup - and B sup 0 -> D sub s sup - K sup + in a sample of 84 million UPSILON(4S) decays into B(bar B) pairs collected with the BABAR detector at the PEP II asymmetric-energy e sup + e sup - storage ring. The measure the branching fractions BETA(B sup 0 -> D sub s sup + pi sup -) = (3.2 +- 0.9(stat.) +- 1.0(syst.)) x 10 sup - sup 5 and BETA(B sup 0 -> D sub s sup - K sup +) = (3.2 +- 1.0(stat.) +- 1.0(syst.)) x 10 sup - sup 5. They also set 90% C.L. limits BETA(B sup 0 -> D sub s sup * sup + pi sup -) D sub s sup * sup - K sup +) < 2.5 x 10 sup - sup 5.

  6. Measurement of σ(p$\\bar{p}$→Z) Br(Z→τ<sup>+τ->) and search for Higgs bosons decaying to τ<sup>+τ-> at √s= 1.96 TeV

    Energy Technology Data Exchange (ETDEWEB)

    Galea, Cristina Florina [Radboud Univ. Nijmegen (Netherlands)

    2008-01-25

    The resonant production of tau-lepton pairs is as interesting for the study of Standard Model (SM) physics as the production of lighter leptons pairs. For new phenomena, such as Higgs boson production or in case new particles beyond the SM would arise, the detection of (resonant) pairs of tau leptons becomes much more interesting. This is due to the fact that tau leptons are much heavier than the other leptons, which increases the chance that these new phenomena would be observed first in this channel. Unfortunately their clean detection is far more difficult than that of muons or electrons. The cross section times branching ratio σ. Br for the process p$\\bar{p}$ → Z → τ<sup>+τ-> was measured at √s = 1.96 GeV using 1.0 fb<sup>-1sup> of data collected by the D0 experiment. This measurement was performed in the channel in which one of the tau leptons decays to a muon and neutrinos, while the other decays either hadronically or to an electron and neutrinos. A set of 1511 events, of which about 20% estimated background, passed all selection criteria. The trigger and muon reconstruction efficiencies, as well as the efficiency for track reconstruction were obtained from data using the 'tag and probe' method on Z → μ<sup>+μ-> events. The multijet background was estimated from the sample of events which passed all selection criteria but in which the muon and the tau candidate had the same charge. The W → μv + jets background was modeled by Monte Carlo simulations, but normalized to data. All the other backgrounds, as well as the efficiency for Z → τ<sup>+τ-> events were estimated using simulated events normalized to the theoretical calculations of cross sections at next-to-leading order or next-to-next-to-leading order. The energy of the tau candidates was corrected for the estimated response of the charged pions in the calorimeter, which is of the order 50-80%. Since the charged pion response

  7. Search for CP violation in D{sup 0}→π{sup −}π{sup +}π{sup 0} decays with the energy test

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Akar, S. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); An, L. [Center for High Energy Physics, Tsinghua University, Beijing (China); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2015-01-05

    A search for time-integrated CP violation in the Cabibbo-suppressed decay D{sup 0}→π{sup −}π{sup +}π{sup 0} is performed using for the first time an unbinned model-independent technique known as the energy test. Using proton–proton collision data, corresponding to an integrated luminosity of 2.0 fb{sup −1} collected by the LHCb detector at a centre-of-mass energy of √(s)=8 TeV, the world's best sensitivity to CP violation in this decay is obtained. The data are found to be consistent with the hypothesis of CP symmetry with a p-value of (2.6±0.5)%.

  8. Apoptosis Signaling Is Altered in CD4<sup>+>CD25<sup>+>FoxP3<sup>+> T Regulatory Lymphocytes in Pre-Eclampsia

    Directory of Open Access Journals (Sweden)

    Jan Oleszczuk

    2012-05-01

    Full Text Available The aim of our study was to estimate the surface expressions of CD95 (APO-1/Fas antigen and the intracellular expressions of anti-apoptotic protein Bcl-2 and pro-apoptotic protein Bax in CD4<sup>+>CD25<sup>+>FoxP3<sup>+> T regulatory lymphocytes (Tregs as well as the percentage of CD8<sup>+>CD28<sup>+> T cytotoxic cells in peripheral blood of patients with pre-eclampsia in comparison with healthy pregnant women in the third trimester of physiological pregnancy. Twenty-four women with pre-eclampsia and 20 normal third trimester pregnant women were included in the study. The lymphocytes were isolated from peripheral blood samples and labeled with monoclonal antibodies. The expressions of surface antigens and intracellular proteins were estimated using flow cytometry. The population of CD4<sup>+>CD25<sup>+>FoxP3<sup>+> Treg cells was significantly lower in peripheral blood of patients with pre-eclampsia when compared to normal third trimester pregnant women. The percentages of CD4<sup>+>CD25<sup>+>FoxP3<sup>+> Treg cells that express Bcl-2 protein were significantly lower in peripheral blood of patients with pre-eclampsia when compared to healthy pregnant women, whereas the percentages of CD4<sup>+>CD25<sup>+>FoxP3<sup>+> Treg cells with the expressions of Bax protein did not differ in both groups. Moreover, the mean fluorescence intensity (MFI of Bcl-2 protein in CD4<sup>+>CD25<sup>+>FoxP3<sup>+> Treg cells was significantly lower and MFI of Bax protein significantly higher in pre-eclampsia when compared to the control group. The percentage of CD8<sup>+>CD28<sup>+> T cells did not differ in both studied groups but MFI of CD28 antigen on T CD8<sup>+> cells was significantly higher in pre-eclampsia when compared to the control group. The obtained results suggest that the deficit of CD4<sup>+>CD25<sup>+>FoxP3<sup>+> Treg

  9. Energy transfer phenomena in GdF sub 3 :Mn co-doped with Ce sup 3 sup + , Pr sup 3 sup + or Zr sup 4 sup +

    CERN Document Server

    Kobayashi, M; Ishii, M; Solovieva, N; Nikl, M

    2003-01-01

    We studied the effects of Mn sup 2 sup + doping and Ce sup 3 sup + or Pr sup 3 sup + or Zr sup 4 sup + co-doping on the scintillation characteristics of GdF sub 3 powder crystals including excitation-emission spectra and decay time for UV excitation, light yield (LY) and luminescence spectra for X-rays. In GdF sub 3 :Mn sup 2 sup + , the dominant Mn sup 2 sup + emission occurred at 515 nm with a decay constant tau - 24 ms for excitation at 275 nm. The LY increased monotonically as the Mn sup 2 sup + concentration decreased from 1 at.% down to 20 at.ppm, indicating very efficient Gd sup 3 sup + -> Mn sup 2 sup + energy transfer and possible concentration quenching at large Mn sup 2 sup + concentrations. The maximum LY for X-rays was about 19% of Gd sub 2 O sub 2 S:Pr sup 3 sup + , Ce sup 3 sup + , one of the brightest ceramics scintillators employed in X-ray computed tomography. While efficient energy transfers of Ce sup 3 sup + -> Gd sup 3 sup + and Ce sup 3 sup + -> (Gd sup 3 sup +) sub n -> Mn sup 2 sup + w...

  10. Evolution of the pi g sub 9 sub / sub 2 x nu h sub 1 sub 1 sub / sub 2 configuration in the neutron-rich sup 1 sup 1 sup 0 sup , sup 1 sup 1 sup 2 sub 4 sub 5 Rh and sup 1 sup 1 sup 4 sup , sup 1 sup 1 sup 6 sub 4 sub 7 Ag isotopes

    CERN Document Server

    Porquet, M G; Deloncle, I; Venkova, T; Astier, A; Buforn, N; Meyer, M; Prevost, A; Redon, N; Stezowski, O; Donadille, L; Dorvaux, O; Gall, B J P; Schulz, N; Lalkovski, S; Lucas, R; Minkova, A

    2003-01-01

    The sup 1 sup 1 sup 0 sup , sup 1 sup 1 sup 2 Rh and sup 1 sup 1 sup 4 sup , sup 1 sup 1 sup 6 Ag nuclei have been produced as fission fragments in the fusion reaction sup 1 sup 8 O+ sup 2 sup 0 sup 8 Pb at 85 MeV. Their level schemes have been built from gamma-rays detected using the Euroball IV array. High-spin states of these neutron-rich nuclei have been identified for the first time. The yrast structures consist of rotational bands in which the odd proton occupies the pi g sub 9 sub / sub 2 sub-shell and the odd neutron the nu h sub 1 sub 1 sub / sub 2 sub-shell. The evolution of the pi g sub 9 sub / sub 2 x nu h sub 1 sub 1 sub / sub 2 band structure is analyzed as a function of the neutron number.

  11. Combined fit to the e{sup +}e{sup -} → π{sup +}π{sup -}J/ψ and e{sup +}e{sup -} → π{sup +}π{sup -}ψ(3686) line shape

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Jielei; Yuan, Limin [Xinyang Normal University, College of Physics and Electronic Engineering, Xinyang (China)

    2017-11-15

    We analyze the cross section of e{sup +}e{sup -} → π{sup +}π{sup -}J/ψ measured by Belle, BABAR and BESIII experiments. The parameters of the two resonances Y(4220) and Y(4360) are consistent with that in e{sup +}e{sup -} → π{sup +}π{sup -}ψ(3686). A combined fit is performed to the two cross sections assuming the two resonances Y(4220) and Y(4360) have the same parameters. The parameters of Y(4220), Y(4360) and Y(4660) are determined to be M{sub Y(4220)} = (4223.3 ± 1.6 ± 2.5) MeV/c{sup 2}, Γ{sub Y(4220)} = (54.2 ± 2.6 ± 1.0) MeV; M{sub Y(4360)} = (4386.4 ± 2.1 ± 6.4) MeV/c{sup 2}, Γ{sub Y(4360)} = (96.0 ± 6.7 ± 2.7) MeV; M{sub Y(4660)} = (4646.4 ± 9.7 ± 4.8) MeV/c{sup 2}, Γ{sub Y(4660)} = (103.5 ± 15.6 ± 4.0) MeV, where the first uncertainties are statistical and the second systematic. The ratios (B(Y(4220)→π{sup +}π{sup -}ψ(3686)))/(B(Y(4220)→π{sup +}π{sup -}J/ψ)) and (B(Y(4360)→π{sup +}π{sup -}ψ(3686)))/(B(Y(4360)→π{sup +}π{sup -}J/ψ)) are also obtained, which may help in understanding the nature of these structures. (orig.)

  12. NMR spectroscopy of organic compounds of selenium and tellurium. Communication 8. Constants of spin-spin interaction of /sup 125/Te-/sup 1/o/sup 3/C in nmr spectra of unsaturated organtellurides

    Energy Technology Data Exchange (ETDEWEB)

    Kalabin, G.A.; Kushnarev, D.F.; Valeev, R.B. (Irkutskij Gosudarstvennyj Univ. (USSR))

    1981-06-01

    On the basis of /sup 13/C NMR spectra of a series of unsaturated and aromatic tellurium compounds the constants of spin-spin interaction (SSIC) (sup(1.2)J(Te, C)) are measured. A reliable linear relation between /sup 1/J(Te, C) and s-character of a carbon orbitale forming bond with tellurium is found. Correlation of straight SSIC of carbon with selenium and tellurium in isological compounds is established.

  13. Measurement of CP Violation in B<sup>0sup>d Mixing Using B<sup>0sup>d → D<sup>*-μ+>(νμ)X Decays

    Energy Technology Data Exchange (ETDEWEB)

    Ross, Anthony [Lancaster Univ. (United Kingdom)

    2012-09-10

    This thesis describes the measurement of the time-integrated semileptonic charge asymmetry in B<sup>0sup>d mixing, a<sup>d> sl, using the decay chain of B<sup>0sup>d ! D<sup>*-μ+>(νμ), D<sup>*-> ! D<sup>0sup>π->, D<sup>0sup> ! K<sup>+π->. Decay candidates are reconstructed from 10.4 fb<sup>-1sup> of data recorded by the DØ detector at Fermilab’s Tevatron p$\\bar{p}$ collder during the 2002- 2011 ‘RunII’ data taking period. Yields are extracted using a 2 minimising simultaneous binned fit where 490k D candidates are reconstructed. The measurements presented in this thesis was made possible due to sophisticated online and offline reconstruction software, precise tracking systems, and the first-order background asymmetry negating magnet polarity reversal of the DØ detector.

  14. Etched track technique to measure sup 2 sup 2 sup 2 Rn and sup 2 sup 2 sup 0 Rn fluxes on soil surface

    CERN Document Server

    Csige, I

    2003-01-01

    sup 2 sup 2 sup 2 Rn and sup 2 sup 2 sup 0 Rn in the human environment are considered to be a risk factor because of the radiation dose due to the inhalation of their short-lived daughters. Main source of radon is usually the soil; therefore the measurement of fluxes of sup 2 sup 2 sup 2 Rn and sup 2 sup 2 sup 0 Rn on soil surfaces is often a relevant parameter to characterise building site radon potential. An etched track detector technique was developed to measure long-time average sup 2 sup 2 sup 2 Rn and sup 2 sup 2 sup 0 Rn fluxes. (R.P.)

  15. Improved limit on the branching fraction of the rare decay K{sup 0}{sub S} → μ{sup +}μ{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Santiago de Compostela Univ. (Spain); Adinolfi, M. [Bristol Univ. (United Kingdom). H.H. Wills Physics Lab.; Collaboration: LHCb Collaboration; and others

    2017-10-15

    A search for the decay K{sup 0}{sub S} → μ{sup +}μ{sup -} is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb{sup -1}, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yield is consistent with the background-only hypothesis, yielding a limit on the branching fraction of B(K{sup 0}{sub S} → μ{sup +}μ{sup -}) < 0.8 (1.0) x 10{sup -9} at 90% (95%) confidence level. This result improves the previous upper limit on the branching fraction by an order of magnitude. (orig.)

  16. Energy levels and classifications of triply excited states of Li, Be sup + , B sup 2 sup + , and C sup 3 sup +

    CERN Document Server

    Conneely, M J

    2002-01-01

    We report and tabulate the energies, classifications, effective quantum numbers, and configuration mixings of the triply excited sup 2 sup , sup 4 S sup e sup , sup o , sup 2 sup , sup 4 P sup e sup , sup o , sup 2 sup , sup 4 D sup e sup , sup o , and sup 2 sup , sup 4 F sup e sup , sup o states of 3-electron systems from Z=3 to 6, namely, Li, Be sup + , B sup 2 sup + , and C sup 3 sup +. For all cases considered, no electron is in the 1s state. Our results are based on calculations using the truncated diagonalization method (TDM) with hydrogenic basis functions. Where available, we compare our results with other calculations and with experiments.

  17. Emission of intermediate-mass fragments in the interaction of sup 1 sup 6 O with sup 5 sup 9 Co, sup 9 sup 3 Nb and sup 1 sup 9 sup 7 Au

    CERN Document Server

    Gadioli, E; Birattari, C; Cavinato, M; Fabrici, E; Gadioli-Erba, E; Pigni, M; Steyn, G F; Förtsch, S V; Lawrie, J J; Connell, S H; Sellschop, J P Friedel; Sideras-Haddad, E; Cowley, A A

    2003-01-01

    In this paper we study the emission of sup 8 Be sub g sub s , B and N fragments in the interaction of sup 1 sup 6 O ions with sup 5 sup 9 Co, sup 9 sup 3 Nb and sup 1 sup 9 sup 7 Au at incident energies varying from 6 to 25 MeV/nucleon. The spectra of these fragments, as well as those of C fragments studied in a previous paper, are dominated at forward angles by a component originating from break-up of sup 1 sup 6 O. At the higher incident energies break-up occurs after quite a sizeable projectile energy loss. Another mechanism which dominates at large emission angles, favours the emission of low-energy fragments and is attributed to the coalescence of nucleons during the cascade of nucleon-nucleon interactions by means of which the excited nuclei produced in the primary two-ion interaction thermalize. (orig.)

  18. Measurement of the B<sup>0sup>s lifetime using the semileptonic decay channel B<sup>0sup>s → D<sup>-sμ+>vX

    Energy Technology Data Exchange (ETDEWEB)

    Lizarraga, Marco Antonio Carrasco [National Polytechnic Inst. (IPN), Zacatenco (Mexico). Centre for Research and Advanced Studies (CINVESTAV)

    2009-11-01

    We report a measurement of the B<sup>0sup>s lifetime in the semileptonic decay channel BB<sup>0sup>s → D<sup>-sμ+>vX (and its charge conjugate), using approximately 0.4 fb<sup>-1sup> of data collected with the DØ detector during 2002–2004. Using 5176 reconstructed D<sup>->s μ<sup>+> signal events, we have measured the B<sup>0sup>s lifetime to be τ (B<sup>0sup>s) = 1.398 ± 0.044 (stat)<sup>+0.028sup> -0.025 (syst) ps. This is the most precise measurement of the B<sup>0sup>s lifetime to date.

  19. Measurement of thermal neutron cross-sections and resonance integrals for sup 7 sup 1 Ga(n,gamma) sup 7 sup 2 Ga and sup 7 sup 5 As(n,gamma) sup 7 sup 6 As by using sup 2 sup 4 sup 1 Am-Be isotopic neutron source

    CERN Document Server

    Karadag, M; Tan, M; Oezmen, A

    2003-01-01

    Thermal neutron cross-sections and resonance integrals for the sup 7 sup 1 Ga(n,gamma) sup 7 sup 2 Ga and sup 7 sup 5 As(n,gamma) sup 7 sup 6 As reactions were measured by the activation method. The experimental samples with and without a cylindrical Cd shield case in 1 mm wall thickness were irradiated in an isotropic neutron field of the sup 2 sup 4 sup 1 Am-Be neutron source. The induced activities in the samples were measured by high-resolution gamma-ray spectrometry with a calibrated reverse-electrode germanium detector. Thermal neutron cross-sections for 2200 m/s neutrons and resonance integrals for the sup 7 sup 1 Ga(n,gamma) sup 7 sup 2 Ga and sup 7 sup 5 As(n,gamma) sup 7 sup 6 As reactions have been obtained relative to the reference values, sigma sub 0 =13.3+-0.1 b and I sub 0 =14.0+-0.3 b for the sup 5 sup 5 Mn(n,gamma) sup 5 sup 6 Mn reaction as a single comparator. The necessary correction factors for gamma attenuation, thermal neutron and resonance neutron self-shielding effects were taken into...

  20. Measurement of Branching Fractions and CP-violating Charge Asymmetries in B sup + -> rho sup +pi sup 0 and B sup + -> rho sup 0 pi sup + decays, and search for B sup 0 -> rho sup 0 pi sup 0

    CERN Document Server

    Yu, Z

    2003-01-01

    The present preliminary measurements of branching fractions and CP-violating charge asymmetries in B-meson decays to rho pi. The data sample comprises 89 million UPSILON(4S) -> B(bar B) decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factor at SLAC. They find the charge-averaged branching fractions BETA(B sup + -> rho sup +pi sup 0) = (11.0 +- 1.9(stat.) +- 1.9(syst.)) x 10 sup - sup 6 and BETA(B sup + -> rho sup 0 pi sup +) = (9.3 +- 1.0(stat.) +- 0.8(syst.)) x 10 sup - sup 6; they set a 90% confidence-level upper limit of BETA(B sup 0 -> rho sup 0 pi sup 0) < 2.5 x 10 sup - sup 6. They measure the CP-violating charge asymmetries A sub C sub P suprho sup + suppi sup 0 = 0.23 +- 0.16(stat.) +- 0.06(syst.) and A sub C sub P suprho sup 0 suppi sup + = -0.17 +- 0.11(stat.) +- 0.02(syst.).

  1. Study of the following decays: K{sub l,s} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -}; Etude des desintegrations K{sub l,s} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Cogan, J

    2001-12-01

    The study of the K{sub L,S} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -} decay modes in the NA48 experiment at CERN is presented in this thesis. Using the full data samples collected in 1998 and 1999, 1285 {+-} 37 events K{sub L} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -} have been extracted over a background of 41 events. The measured branching ratio is: BR(K{sub L} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -})=[3,16{+-}0,09(stat.){+-}0,16(syst.)] x 10{sup -7}. Concerning the K{sub S} mode, a signal of 768 {+-} 28 candidates has been observed over a negligible background. The obtained branching ratio is: BR(K{sub S} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -})=[4,28{+-}0,18(stat.){+-}0,26(syst.)] x 10{sup -5}. Both results are in very good agreement with the values predicted by phenomenological models where the processes K{sub L,S} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -} are described in terms of inner Bremsstrahlung and direct emission contributions. In the K{sub L} mode, the presence of two components with opposed CP states leads to a large asymmetry A in the distribution of the angle {phi} between the decay planes of the two pions and the two electrons. The detailed analysis of the K{sub L} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -} mode ends up to a non-zero value of the asymmetry with more than 4 standard deviations: A(K{sub L} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -})=[13,8{+-}2,8(stat.){+-}2,3(syst.)]%. This result is a clear manifestation of CP violation in this channel. The large value of this asymmetry, in excellent agreement with theoretical prediction, accounts for CP violation in the K{sup 0}-K-bar{sup 0} mixing. Furthermore, it was verified that in the K{sub S} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -} mode which is dominated by the inner Bremsstrahlung component, the asymmetry is compatible with zero: A(K{sub S} {yields} {pi}{sup +}{pi}{sup -}e{sup +}e{sup -})=[-0,8{+-}3,6(stat.){+-}1,2(syst.)]%. (author)

  2. Development of Na/sup 123/I pharmaceutical from antimony target

    Energy Technology Data Exchange (ETDEWEB)

    Yongjian, L.; Qixun, S.; Dequn, S. (Shanghai Inst. of Nuclear Research, Academia Sinica, Shanghai (China))

    A new method for the production of Na/sup 123/I is described. It is produced by the /sup 121/Sb(..cap alpha..,2n)/sup 123/I nuclear reaction and using a natural antimony target prepared by electroplating in a bath of antimony oxide and hydrofluoric acid. The target is irradiated with 32MeV ..cap alpha..-beams then transferred to a dry distillation apparatus and the iodide evolved and absorbed in NaOH. Quality control is by paper chromatography.

  3. Measurement of CP violation and constraints on the CKM angle γ in B{sup ±}→DK{sup ±} with D→K{sub S}{sup 0}π{sup +}π{sup −} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); An, L. [Center for High Energy Physics, Tsinghua University, Beijing (China); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andreotti, M. [Sezione INFN di Ferrara, Ferrara (Italy); and others

    2014-11-15

    A model-dependent amplitude analysis of B{sup ±}→DK{sup ±} with D→K{sub S}{sup 0}π{sup +}π{sup −} decays is performed using proton–proton collision data, corresponding to an integrated luminosity of 1 fb{sup −1}, recorded by LHCb at a centre-of-mass energy of 7 TeV in 2011. Values of the CP violation observables x{sub ±} and y{sub ±}, which are sensitive to the CKM angle γ, are measured to be x{sub −}=+0.027±0.044{sub −0.008}{sup +0.010}±0.001, y{sub −}=+0.013±0.048{sub −0.007}{sup +0.009}±0.003, x{sub +}=−0.084±0.045±0.009±0.005, y{sub +}=−0.032±0.048{sub −0.009}{sup +0.010}±0.008, where the first uncertainty is statistical, the second systematic and the third arises from the uncertainty of the D→K{sub S}{sup 0}π{sup +}π{sup −} amplitude model. The value of γ is determined to be (84{sub −42}{sup +49})°, including all sources of uncertainty. Neutral D meson mixing is found to have negligible effect.

  4. Measurement of the CP-violating phase ϕ{sub s} in B{sup ¯}{sub s}{sup 0}→J/ψπ{sup +}π{sup −} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Akar, S. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); An, L. [Center for High Energy Physics, Tsinghua University, Beijing (China); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2014-09-07

    The mixing-induced CP-violating phase ϕ{sub s} in B{sub s}{sup 0} and B{sup ¯}{sub s}{sup 0} decays is measured using the J/ψπ{sup +}π{sup −} final state in data, taken from 3 fb{sup −1} of integrated luminosity, collected with the LHCb detector in 7 and 8 TeV centre-of-mass pp collisions at the LHC. A time-dependent flavour-tagged amplitude analysis, allowing for direct CP violation, yields a value for the phase ϕ{sub s}=70±68±8 mrad. This result is consistent with the Standard Model expectation and previous measurements.

  5. A prospective assessment of the sup 2 sup 1 sup 0 Po surface collection for estimating sup 2 sup 2 sup 2 Rn exposure

    CERN Document Server

    Fitzgerald, B

    2000-01-01

    Previous studies have examined the utility of measuring the embedded sup 2 sup 1 sup 0 Po in solid materials as an indicator of long-term sup 2 sup 2 sup 2 Rn exposure. However, in those studies, existing surfaces were employed. In this prospective study, pairs of glass surfaces were placed in homes around the United States along with an LR-115-II-etched track radon detector for each piece of glass. A subset of these glass samples has been analyzed for sup 2 sup 1 sup 0 Po activity. The results of measurements on a subset of samples are presented. The independent sup 2 sup 2 sup 2 Rn measurements are compared with the sup 2 sup 1 sup 0 Po measurements and a relationship is obtained between the two results using a model for the accumulation of activity within an enclosed space. The data are interpreted in terms of (a) the usefulness of the sup 2 sup 1 sup 0 Po measurements as a long-term sup 2 sup 2 sup 2 Rn detector and (b) the value of a new interpretation scheme to make retrospective assessments of the sup ...

  6. Investigation of characteristics of sup 2 sup 0 sup 1 Tl -> sup 2 sup 0 sup 1 Hg

    CERN Document Server

    Kharitonov, V V

    2002-01-01

    The estimated intensities of transitions on the ground and first-excited levels in the sup 2 sup 0 sup 1 Hg at the decay of sup 2 sup 0 sup 1 Tl and estimated constants lg ft are obtained from the analysis of the relative intensities of the mercury M sub 4 N sub 6 sub , sub 7 N sub 6 sub , sub 7 Auger-electron line, initiated by the e-capture and of the conversion O sub 3 -mercury line, due to the nuclear transition with the energy 1.56 keV

  7. Three-body decays of B{sup 0(+)} → K{sup *0(+)}π{sup +}π{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Mohammadi, Behnam; Mehraban, Hossein [Semnan University, Physics Department, Semnan (Iran, Islamic Republic of)

    2014-08-15

    We are interested in the analysis of the three-body decays of B{sup 0} → K{sup *0}π{sup +}π{sup -} and B{sup +} → K{sup *+}π{sup +}π{sup -}. There are tree and penguin diagrams for these decay modes in the naive factorization approach and the transition matrix element of them is factorized into a B → π{sup +}π{sup -} form factor multiplied by 0 → K{sup *} decay constant and B → K{sup *} form factor multiplied into 0 → π{sup +}π{sup -} weak and electromagnetic vertices form factor. We investigate these decays by using the Dalitz plot analysis. We use the general form of this technique for the calculation of the B{sup 0} → K{sup *0}π{sup +}π{sup -} and B{sup +} → K{sup *+}π{sup +}π{sup -} decays and obtain the values (3.74 ± 0.50) x 10{sup -5} and (9.64 ± 1.37) x 10{sup -5} for the branching ratios, while the experimental results are (5.50 ± 0.50) x 10{sup -5} and (7.50 ± 1.00) x 10{sup -5}, respectively. The branching ratios obtained by applying the Dalitz plot analysis are compatible with the experimental results. (orig.)

  8. Search of the chemical change of the sup(119m)Sn (Tsub(1/2) = 293 days) radioactive decay rate

    International Nuclear Information System (INIS)

    Makariunas, K.; Makariuniene, E.; Dragunas, A.

    1983-01-01

    The differences in decay rates of the nuclear isomer sup(119m)Sn (Tsub(1/2) = 293 days; the strongly converted M4 transition) have been measured for different chemical compounds. The experimental results show that the sup(119m)Sn nuclei in the telluride SnTe decay faster than in the metal β-Sn and in the dioxide SnO 2 [the relative change Δlambda/lambda the decay probability lambda is +(3.6+-1.4)x10 -4 ]. No measurable difference between the decay rates of sup(119m)Sn in β-Sn and SnO 2 has been observed [Δlambda/lambda = -(0.1+-1.2)x10 -4 ], irrespective of the great difference in electronic structure of the tin atoms. The results cannot be explained by considering the internal conversion of the valence electrons only. It is necessary to assume that the chemical changes of the decay rate are strongly influenced by the chemical changes of the probabilities of the internal conversion of electrons of the inner shells of the atom. This conclusion is confirmed by theoretical calculations. (Auth.)

  9. Ab initio calculations of the {sup 33}S 3p{sup 4} {sup 3}P{sub J} and {sup 33}S{sup -}/{sup 37,} {sup 35}Cl 3p{sup 5} {sup 2}P{sup o}{sub J} hyperfine structures

    Energy Technology Data Exchange (ETDEWEB)

    Carette, T; Godefroid, M R, E-mail: tcarette@ulb.ac.be, E-mail: mrgodef@ulb.ac.be [Chimie Quantique et Photophysique, CP160/09, Universite Libre de Bruxelles, Avenue FD Roosevelt 50, B-1050 Brussels (Belgium)

    2011-05-28

    We present highly correlated multi-configuration Hartree-Fock (MCHF) calculations of the hyperfine structure of the 3p{sup 5} {sup 2}P{sup o}{sub J} levels of {sup 33}S{sup -} and {sup 35,} {sup 37}Cl. We obtain good agreement with observation. The hyperfine structure of the neutral sulphur {sup 33}S 3p{sup 4} {sup 3}P{sub J} lowest multiplet that has never been measured to the knowledge of the authors is also estimated theoretically. We discuss some interesting observations made on the description of the atomic core in MCHF theory.

  10. An efficient and accurate approach to MTE-MART for time-resolved tomographic PIV

    NARCIS (Netherlands)

    Lynch, KP; Scarano, F.

    2015-01-01

    The motion-tracking-enhanced MART (MTE-MART; Novara et al. in Meas Sci Technol 21:035401, 2010) has demonstrated the potential to increase the accuracy of tomographic PIV by the combined use of a short sequence of non-simultaneous recordings. A clear bottleneck of the MTE-MART technique has been

  11. An efficient and accurate approach to MTE-MART for time-resolved tomographic PIV

    NARCIS (Netherlands)

    Lynch, K.P.; Scarano, F.

    2015-01-01

    The motion-tracking-enhanced MART (MTE-MART; Novara et al. in Meas Sci Technol 21:035401, 2010) has demonstrated the potential to increase the accuracy of tomographic PIV by the combined use of a short sequence of non-simultaneous recordings. A clear bottleneck of the MTE-MART technique has been its

  12. Separations on a cellulose exchanger with salicylic acid as functional group. [Fe/sup 3//sup+//Cu/sup 2//sup+/, Cu/sup 2//sup+//Ni/sup 2//sup+//, and Cu/sup 2//sup+//Cu complex separations

    Energy Technology Data Exchange (ETDEWEB)

    Burba, P; Lieser, K H [Technische Hochschule Darmstadt (F.R. Germany). Fachbereich Anorganische Chemie und Kernchemie

    1976-07-01

    The use of a cellulose compound containing salicylic acid as functional group (capacity 0.6 mequ./g) for different problems is described. The seperations Fe/sup 3 +//Cu/sup 2 +/ and Cu/sup 2 +//Ni/sup 2 +/ in aqueous solutions are achieved smoothly at pH 2 and 2.5 resp. In organic solvents (pyridine) copper ions are separated from copper complexes as shown by the examples Cu/sup 2 +//(Cu(mnt)/sub 2/)/sup 2 -/ (mnt = maleonitril-1,2-dithiolate) and Cu/sup 2 +//dibenzo(b.i.)(5.9.14.18)tetraazacyclotetradecene-copper (Cu(chel)). The complex (Cu(mnt)/sub 2/)/sup 2 -/ can be labelled with Cu-64 on a separation column, whereas (Cu-(chel)) is substition inert.

  13. Determination of {sup 210}Pb and {sup 210}Po in cigarette tobacco; Determinacao de {sup 210}Pb e {sup 210}Po em tabaco de cigarros nacionais

    Energy Technology Data Exchange (ETDEWEB)

    Peres, Ana Claudia

    1999-07-01

    Cigarette smoking is one of the important pathways that could contribute to enhance the radiation dose to man, due to the relatively large concentrations of {sup 210}Pb and {sup 210}Po found in tobacco leaves. In this work, concentrations of these two radionuclides were determined in eight of the most commercialized cigarette brands produced in Brazil. The samples analyzed were bought randomly in the market. The {sup 210}Pb was determined by counting the beta activity of the {sup 210}Bi in a gas flow proportional detector, after radiochemical separation and precipitation of the PbCr0{sub 4}. The {sup 210}Po was determined by alpha spectrometry, using a surface barrier detector, after radiochemical separation and spontaneous deposition of Po in copper disk. The results showed concentrations ranging from 11,9 to 30,2 mBq per gram of dry tobacco for {sup 210}Pb and from 10,9 to 27,4 mBq per gram of dry tobacco for {sup 210}Po. (author)

  14. Fourier-transform spectroscopy of (4){sup 1}Σ{sup +} → A {sup 1}Σ{sup +} − b {sup 3}Π, A {sup 1}Σ{sup +} − b {sup 3}Π → X{sup 1}Σ{sup +}, and (1){sup 3} Δ{sub 1} → b{sup 3}Π{sub 0±} transitions in KCs and deperturbation treatment of A {sup 1}Σ{sup +} and b {sup 3}Π states

    Energy Technology Data Exchange (ETDEWEB)

    Kruzins, A.; Klincare, I.; Nikolayeva, O.; Tamanis, M.; Ferber, R., E-mail: ferber@latnet.lv [Laser Center, University of Latvia, 19 Rainis Boulevard, Riga LV-1586 (Latvia); Pazyuk, E. A.; Stolyarov, A. V., E-mail: avstol@phys.chem.msu.ru [Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Leninskie gory 1/3 (Russian Federation)

    2013-12-28

    High resolution Fourier-transform spectroscopy data of term values in the spin-orbit (SO) coupled first excited A {sup 1}Σ{sup +} and b{sup 3}Π{sub 0±} states in KCs were obtained from (4){sup 1}Σ{sup +} → A {sup 1}Σ{sup +} − b {sup 3}Π, A {sup 1}Σ{sup +} − b {sup 3}Π → X{sup 1}Σ{sup +}, and (1){sup 3}Δ{sub 1} → b{sup 3}Π{sub 0±} spectra of laser-induced fluorescence (LIF). About 3000 new rovibronic term values of the A {sup 1}Σ{sup +} and b {sup 3}Π{sub Ω} states were obtained with an uncertainty about 0.01 cm{sup −1} and added to the previously obtained 3439 term values in Kruzins et al. [Phys. Rev. A 81, 042509 (2010)] and 30 term values of the b {sup 3}Π{sub 0{sup +}} state levels below the A {sup 1}Σ{sup +} state in Tamanis et al. [Phys. Rev. A 82, 032506 (2010)]. The data field was extended considerably, going down to vibrational level v{sub b} = 0 and up in energy to 13 814 cm{sup −1}, as compared to previously achieved v{sub b} = 14 and E = 13 250 cm{sup −1}. Overall 6431 e-symmetry term values of {sup 39}K{sup 133}Cs were included in 4 × 4 coupled-channel deperturbation analysis. The analytical Morse-Long-Range (MLR) function yielded empirical diabatic potentials for the A {sup 1}Σ{sup +} and b {sup 3}Π{sub 0{sup +}} states while the morphing of the SO ab initio points [J. T. Kim et al., J. Mol. Spectrosc. 256, 57 (2009)] provided the empirical diagonal and off-diagonal SO functions. Overall 98.5% of the fitted term values were reproduced with a rms (root mean square) uncertainty of 0.004 cm{sup −1}. The reliability of the model is proved by a good agreement of predicted and measured term values of the {sup 41}K{sup 133}Cs isotopologue, as well as of measured and calculated intensities of (4){sup 1}Σ{sup +} → A {sup 1}Σ{sup +} − b {sup 3}Π LIF progressions. Direct-potential-fit of low-lying v{sub b} levels of the b {sup 3}Π{sub 0{sup −}} component yielded the MLR potential which

  15. Production of sup 5 sup 5 Co via the sup 5 sup 4 Fe(d, n)-process and excitation functions of sup 5 sup 4 Fe(d, t) sup 5 sup 3 Fe and sup 5 sup 4 Fe(d, alpha) sup 5 sup 2 sup m Mn reactions from threshold up to 13.8 MeV

    CERN Document Server

    Zaman, M R; Qaim, S M

    2003-01-01

    For production of the medically interesting beta; sup + -emitter sup 5 sup 5 Co (T sup 1 sup / sup 2 = 17.6 h) via the sup 5 sup 4 Fe(d, n)-reaction, 91.6% enriched sup 5 sup 4 Fe sub 2 O sub 3 , mixed with Al powder, was pressed to a pellet which could be irradiated with 14 MeV deuterons at 4 mu A in a water-cooled target system. A separation method was developed which led to > 99.9% pure sup 5 sup 5 Co and allowed a recovery of the enriched target material. For a target thickness of E sub d = 12.6 -> 5 MeV, the experimental thick target yield of sup 5 sup 5 Co after chemical separation amounted to about 13 MBq/mu A.h, which is about 60% of the theoretical value. In a 3 h irradiation at 4 mu A, the batch yield of sup 5 sup 5 Co achieved was 160 MBq (4.3 mCi). An 8 h irradiation could lead to a batch yield of about 400 MBq. The sup 5 sup 4 Fe(d, n) reaction leads to the highest purity sup 5 sup 5 Co but it is essential that the isotopic enrichment of the target is not less than 90%. In addition to the product...

  16. Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B{sup +}→J/ψπ{sup +} and B{sup +}→J/ψK{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Collaboration: The LHCb collaboration; and others

    2017-03-07

    The ratio of branching fractions and the difference in CP asymmetries of the decays B{sup +}→J/ψπ{sup +} and B{sup +}→J/ψK{sup +} are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb{sup −1} at centre-of-mass energies of 7 and 8 TeV. The results are ((B(B{sup +}→J/ψπ{sup +}))/(B(B{sup +}→J/ψK{sup +})))=(3.83±0.03±0.03)×10{sup −2} , A{sup CP}(B{sup +}→J/ψπ{sup +})−A{sup CP}(B{sup +}→J/ψK{sup +})=(1.82±0.86±0.14)×10{sup −2}, where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of A{sup CP}(B{sup +}→J/ψK{sup +}) provides the most precise estimate to date of CP violation in the decay B{sup +}→J/ψπ{sup +}, A{sup CP}(B{sup +}→J/ψπ{sup +})=(1.91±0.89±0.16)×10{sup −2}.

  17. Crystal blocking measurements of the induced fission time in the sup 2 sup 3 sup 2 Th+p and sup 2 sup 3 sup 2 Th+ sup 3 He reactions

    CERN Document Server

    Drozdov, V A; Fotina, O V; Giardina, G; Malaguti, F; Platonov, S Y; Tulinov, A F; Yuminov, O A

    2002-01-01

    The crystal blocking technique has been used to measure the induced fission lifetimes for the sup 2 sup 3 sup 2 sup , sup 2 sup 3 sup 3 Pa and sup 2 sup 3 sup 2 U nuclei produced in the sup 2 sup 3 sup 2 Th+p and sup 2 sup 3 sup 2 Th+ sup 3 He reactions at bombarding energies of protons and sup 3 He included in the 6.8-7.8 MeV and 20.8-23.4 MeV ranges, respectively. The experimental fission lifetimes observed in these reactions vary from 10 sup - sup 1 sup 6 to 10 sup - sup 1 sup 4 s, depending on the projectile energy. Experimental data have been compared with the statistical model calculations that take into account the existence of both classes of excited states of fissioning nucleus, realized in the first and second potential wells of the double-humped fission barrier. By the analysis of the measured decay times it is possible to determine the absolute values of the level density in the second well, type of shape symmetry in the second well, and also the unknown early values of the shell correction for th...

  18. A microscale synthesis of a promising radiolabelled antitumor drug: cis-1,1-cyclobutanedicarboxylato (2R)-2-methyl-1,4-butanediamine platinum(II), NK121

    Energy Technology Data Exchange (ETDEWEB)

    Suwa, Masato; Kogawa, Osamu; Hashimoto, Yutaka (Nippon Kayaku Co. Ltd., Tokyo (Japan). Research Labs. of Pharmaceuticals Group); Nowatari, Hiroyoshi (Nippon Kayaku Co. Ltd., Takasaki, Gumma (Japan). Takasaki Research Labs.); Murase, Yuko; Homma, Yoshio (Kyoritsu Coll. of Pharmacy, Tokyo (Japan))

    1992-05-01

    A promising antitumor drug, cis-1,1-cyclobutane-dicarboxylato (2R)-2-methyl-1,4-butanediamine platinum (II), NK121, was synthesized from radionuclides of platinum such as {sup 193m}Pt, {sup 195m}Pt and {sup 191}Pt which were produced by neutron irradiation of enriched {sup 192}Pt. The overall yield was 38.6% in a synthesis time of 10 hours. The radioactivities present in 8.39 mg of NK121 were 115.3 {mu}Ci as {sup 193m}Pt, 29.9 {mu}Ci as {sup 197}Pt, 22.0 {mu}Ci as {sup 195m}Pt, and 4.8 {mu}Ci as {sup 191}Pt at the end of synthesis. The specific activity of the NK121 was 13.7 {mu}Ci ({sup 193m}Pt)/mg NK121 at the end of synthesis. The radiochemical purity of NK121 was typically 99%. HPLC analyses confirmed that NK121 was in an adequate chemical purity and suitable for animal experimentation. (author).

  19. The study of sup 1 sup 0 sup 5 Pd(n,gamma) sup 1 sup 0 sup 6 Pd reaction with thermal neutrons

    CERN Document Server

    Miah, M M H; Harada, H; Nakamura, S

    2002-01-01

    This is a report about the study of sup 1 sup 0 sup 5 Pd(n,gamma) sup 1 sup 0 sup 6 Pd reaction with thermal neutrons performed by Dr. M.M.H.Miah, who was engaged in the investigation as a visiting research associate of Japan Nuclear Cycle Development Institute (JNC) under the STA fellowship program for the periods ranging from January 2001 to July 2002, together with members belong to System Design Analysis Group of JNC. The investigation of sup 1 sup 0 sup 5 Pd(n,gamma) sup 1 sup 0 sup 6 Pd reaction has been performed by using the prompt gamma-ray spectroscopic technique to supply basic data for the nuclear transmutation. Samples of natural Pd and enriched sup 1 sup 0 sup 5 Pd were irradiated separately with the B-4 thermal neutron guide facilities at Kyoto University Research Reactor Institute (KURRI). Capture prompt gamma-rays were detected in both singles and coincidence modes by using two high purity Ge detectors. By analyzing gamma-gamma coincidence data, 42 cascading gamma-transitions were identified ...

  20. Study on the energy spectra of sdg odd-A nuclei sup 1 sup 1 sup 5 sup - sup 1 sup 2 sup 3 I with PDHF method

    CERN Document Server

    Liu Ying Tai

    2002-01-01

    The approximate angular-momentum-projected Hartree-Fock (PDHF) method is used to study some odd-A nuclei in the 3s-2d-1g shell: sup 1 sup 1 sup 5 sup - sup 1 sup 2 sup 3 I. Their ground bands and low excited bands are calculated. The calculated results agree well with the experimental spectrum

  1. Investigation of the thermal performance of {sup nat}Te target for {sup 124}I production in the RARS cyclotron

    Energy Technology Data Exchange (ETDEWEB)

    Azizakram, Hamid; Zolfagharpour, Farhad [Univ. of Mohaghegh Ardabili, Ardabil (Iran, Islamic Republic of). Dept. of Physics; Sadeghi, Mahdi [Iran Univ. of Medical Science, Tehran (Iran, Islamic Republic of). Medical Physics Dept.; Ashtari, Parviz [Nuclear Science and Technology Research Institute, Tehran (Iran, Islamic Republic of). Radiation Application Research School (RARS); Nikjou, Amir [Payam Noor Univ., Tehran (Iran, Islamic Republic of). Dept. of Physics

    2017-12-15

    Regarding the low thermal conductivity of {sup nat}Te element, the provision of an effective cooling system is one of the critical issues in cyclotron targetry to prevent melting of target matter during the irradiation to {sup 124}I production via {sup nat}Te(p,xn){sup 124}I reaction. Heat transfer on Te target and efficiency of cooling fluid in the solid target system have been simulated based on a Finite Element Analysis (FEA) code for the thermal behavior of the target during the irradiation and under different beam currents, coolant flow rates, substrate matters and target geometry. The results on the routinely used solid target in Radiation Application Research School (RARS) cyclotron showed that in a 3 m/s coolant flow rate, by using a fined-cooling system and a nickel substrate coated on copper backing plate, the irradiation beam current can be raised up to 180 μA without any risk of melting. The cooling flow rates greater than 3 m/s do not noticeably improve the heat dispersion of target layer. As expected, a linear increase was observed for the temperature and temperature gradient of plates in the beam currents of 100-300 μA.

  2. Data Evaluation of Actinide Cross Sections: <sup>238sup>Pu, <sup>237sup>Pu, and <sup>236sup>Pu

    Energy Technology Data Exchange (ETDEWEB)

    Guaglioni, S. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Jurgenson, E. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Descalle, M. A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Thompson, I. J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Ormand, E. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Escher, J. E. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Younes, W. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Mattoon, C. M. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Beck, B. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Burke, J. T. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Bailey, T. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2017-10-04

    This report documents the recent evaluation of the <sup>236sup>Pu, <sup>237sup>Pu, and <sup>238sup>Pu cross section sets. Nuclear data evaluation is the fundamental interface that takes measured nuclear cross section data and turns them into a continuous curve that 1) is consistent with other measurements and nuclear reaction theory/models, and 2) is required by down-stream users. All experiments that generate nuclear data need to include an evaluation step for their data to be broadly useful to the end users.

  3. Determination of the {sup 226}Ra, {sup 228}Ra and {sup 210}Pb concentrations in the mineral water springs from water parks of Cambuquira and Marimbeiro, Minas Gerais and assessment of the committed effective doses

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Laíssa A.B. dos; Damatto, Sandra R., E-mail: lbonifacio@ipen.br, E-mail: damatto@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2017-07-01

    Due to the importance of human life, water quality must be controlled and a very important parameter are the limits of the natural radioactivity of the water consumed. In relation to therapeutic practices based on water intake the radionuclides {sup 210}Pb, {sup 226}Ra and {sup 228}Ra when present, are of great importance because they contribute to the internal irradiation of individuals.The study areas of the present work were the Parque das águas of Cambuquira and Marimbeiro, located in Minas Gerais. Hence, the objective of this work was to determine the {sup 226}Ra, {sup 228}Ra and {sup 210}Pb concentrations in the springs of these parks and evaluate the committed effective doses due to its consumption.The radionuclides were determined by a radiochemical procedure in four collections at different seasons of the year. The Concentrations ranged from 4 ± 1 mBq / L to 509 ± 32 mBq / L for {sup 226}Ra, from 3.7 ± 0.1 mBq / L to 631 ± 27 mBq / L for {sup 228}Ra and 5 ± 1 mBq / L to 60 ± 5 mBq / L for {sup 210}Pb. The dose for adults from 1.21 x 10{sup -01} mSv/y for {sup 226}Ra, 3.18 x 10{sup -01} mSv/y for {sup 228}Ra and for {sup 210}Pb 3.02 x 10{sup -02} mSv/y. (author)

  4. Search for direct CP violation in D{sup 0}→h{sup −}h{sup +} modes using semileptonic B decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2013-06-10

    A search for direct CP violation in D{sup 0}→h{sup −}h{sup +} (where h=K or π) is presented using data corresponding to an integrated luminosity of 1.0 fb{sup −1} collected in 2011 by LHCb in pp collisions at a centre-of-mass energy of 7 TeV. The analysis uses D{sup 0} mesons produced in inclusive semileptonic b-hadron decays to the D{sup 0}μX final state, where the charge of the accompanying muon is used to tag the flavour of the D{sup 0} meson. The difference in the CP-violating asymmetries between the two decay channels is measured to be ΔA{sub CP}=A{sub CP}(K{sup −}K{sup +})−A{sub CP}(π{sup −}π{sup +})=(0.49±0.30(stat)±0.14(syst))%. This result does not confirm the evidence for direct CP violation in the charm sector reported in other analyses.

  5. Search for the Standard Model Higgs Boson in p$\\bar{p}$ Interactions with the Decay Mode H → W<sup>+W-> → μ<sup>+->v at the DØ Experiment

    Energy Technology Data Exchange (ETDEWEB)

    Johnston, Dale Morgan [Univ. of Nebraska, Lincoln, NE (United States)

    2010-04-01

    A search for the standard model Higgs boson in p$\\bar{p}$ collisions resulting in two muons and large missing transverse energy is presented. The analysis uses 4.2 fb<sup>-1sup> of integrated luminosity at a center-of-mass energy of √s = 1.96 TeV collected between April 2002 and December 2008 with the D0 detector at the Fermilab Tevatron collider. No significant excess above the background estimation is observed and limits are derived on Higgs boson production.

  6. Observations of B{sub s}{sup 0}→ψ(2S)η and B{sub (s)}{sup 0}→ψ(2S)π{sup +}π{sup −} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2013-06-21

    First observations of the B{sub s}{sup 0}→ψ(2S)η, B{sup 0}→ψ(2S)π{sup +}π{sup −} and B{sub s}{sup 0}→ψ(2S)π{sup +}π{sup −} decays are made using a dataset corresponding to an integrated luminosity of 1.0 fb{sup −1} collected by the LHCb experiment in proton–proton collisions at a centre-of-mass energy of √(s)=7 TeV. The ratios of the branching fractions of each of the ψ(2S) modes with respect to the corresponding J/ψ decays are (B(B{sub s}{sup 0}→ψ(2S)η))/(B(B{sub s}{sup 0}→J/ψη)) =0.83±0.14(stat)±0.12(syst)±0.02(B), (B(B{sup 0}→ψ(2S)π{sup +}π{sup −}))/(B(B{sup 0}→J/ψπ{sup +}π{sup −})) =0.56±0.07(stat)±0.05(syst)±0.01(B), (B(B{sub s}{sup 0}→ψ(2S)π{sup +}π{sup −}))/(B(B{sub s}{sup 0}→J/ψπ{sup +}π{sup −})) =0.34±0.04(stat)±0.03(syst)±0.01(B), where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the J/ψ and ψ(2S) meson decays.

  7. In vivo evaluation of 2'-deoxy-2'-[{sup 18}F]fluoro-5-iodo-1-{beta}-D-arabinofuranosyluracil ([{sup 18}F]FIAU) and 2'-deoxy-2'-[{sup 18}F]fluoro-5-ethyl-1-{beta}-D-arabinofuranosyluracil ([{sup 18}F]FEAU) as markers for suicide gene expression

    Energy Technology Data Exchange (ETDEWEB)

    Alauddin, Mian M. [University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd. T8.3895, P.O. Box 059, Houston, TX (United States); Shahinian, Antranic; Park, Ryan; Fissekis, John D.; Conti, Peter S. [University of Southern California, PET Imaging Science Center, Keck School of Medicine, Los Angeles, CA (United States); Tohme, Michel [University of Southern California, PET Imaging Science Center, Keck School of Medicine, Los Angeles, CA (United States); Department of Biomedical Engineering, UC Davis, Davis, CA (United States)

    2007-06-15

    FIAU and FEAU were evaluated in vitro and in vivo as markers for HSV1-tk gene expression. In vitro and biodistribution studies were performed in wild type and transduced HT-29 cells using [{sup 14}C]FIAU and [{sup 3}H]FEAU. PET imaging was performed using [{sup 18}F]FIAU and [{sup 18}F]FEAU. In vitro uptake of [{sup 14}C]FIAU in tk-positive cells was 39-fold, 49-fold, and 43-fold higher (p < 0.001) than in wild type cells at 30, 60, and 120 min, respectively. Uptake of [{sup 3}H]FEAU in transduced cells was 46-fold, 62-fold, and 121-fold higher (p < 0.001) than in wild type cells at the same time points. In vivo uptake of [{sup 14}C]FIAU at 2 h in HSV1-tk positive tumors was 15.48 {+-} 3.94, 6.7-fold higher (p < 0.001) than in wild type tumors. Uptake of [{sup 3}H]FEAU in transduced tumors was 9.98 {+-} 1.99, 5.0-fold higher (p < 0.001) than in wild type tumors. Micro-PET images using [{sup 18}F]FIAU and [{sup 18}F]FEAU also showed very high uptake in HSV-tk tumors. [{sup 18}F]FIAU and [{sup 18}F]FEAU appear to be potential PET imaging agents for gene expression. (orig.)

  8. Investigation of K sub L , sub S-> pi sup +pi sup - e sup + e sup - decays

    CERN Document Server

    Lai, A; Bevan, A

    2003-01-01

    The K sub L-> pi sup +pi sup - e sup + e sup - and K sub S-> pi sup +pi sup - e sup + e sup - decay modes have been studied in detail using the NA48 detector at the CERN SPS. Based on the data collected during the 1998 and 1999 run periods, a sample of 1162 K sub L-> pi sup +pi sup - e sup + e sup - candidates has been observed with an expected background level of 36.9 events, yielding the branching ratio measurement BR(K sub L -> pi sup +pi sup - e sup + e sup -)=(3.08+-0.20) x 10 sup - sup 7. The distribution of events in the sin phi cos phi variable, where phi is the angle between the pi sup +pi sup - and the e sup + e sup - decay planes in the kaon centre of mass, is found to exhibit a large CP-violating asymmetry with the value A subphi=(14.2+-3.6)%. For the K sub S-> pi sup +pi sup - e sup + e sup - decay channel, 621 candidates have been identified in the 1999 data sample with an estimated background contribution of 0.7 event. The corresponding branching ratio has been determined to be BR(K sub S-> pi ...

  9. Determination of k{sub 0} for {sup 63}Cu(n,γ){sup 64}Cu reaction with covariance analysis

    Energy Technology Data Exchange (ETDEWEB)

    Barros, Livia F.; Dias, Mauro S.; Koskinas, Marina F.; Yamazaki, Ione M.; Semmler, Renato, E-mail: lfbarros@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    Nowadays the k{sub 0} Method is one of the most used procedures on Neutron Activation Analysis (NAA). For an element of interest, the parameter k{sub 0} can be used to determine its mass concentration. The recommended nuclear data has been investigated, and the measurement of this parameter for {sup 63}Cu(n,γ){sup 64}Cu reaction was motivated by some discrepancies that were observed in the literature. The irradiations were performed near the core of the IEA-R1 4.5 MW nuclear research reactor of the Nuclear and Energy Research Institute – IPEN-CNEN/SP, in São Paulo, Brazil. Two irradiations were carried out in sequence, using two sets of samples: the first one with a cadmium cover around the samples and the second one without it. The activity measurements were carried out in a previously calibrated HPGe gamma-ray spectrometer. Standard sources of {sup 152}Eu, {sup 133}Ba, {sup 60}Co and {sup 13}'7Cs supplied by the IAEA with gamma transitions ranging from 121 keV to 1408 keV were used in order to obtain the HPGe gamma-ray peak efficiency as a function of the energy. The covariance matrix methodology was applied to all uncertainties involved. The resulting value of k{sub 0} for {sup 63}Cu(n,γ){sup 64}Cu reaction for the gamma transition energy of the formed isotope {sup 64}Cu 1345.77 keV was 4.99 x 10{sup -4} (78).This final value for k{sub 0} has been compared with the literature. (author)

  10. Measurement of the branching fraction of to D{sup +} {yields} K{sup -} K{sup +}K{sup +} in the LHCb experiment

    Energy Technology Data Exchange (ETDEWEB)

    Amato, Sandra; Cavalcante, Ana Barbara Rodrigues [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil)

    2012-07-01

    Full text: The world's most powerful particle accelerator, Large Hadron Collider (LHC), is located near Geneva built around 100 m underground. For 2010 and 2011 it has collided opposing beams of 3.5 TeV protons and now the beam energy has increased to 4 TeV per beam. The LHCb experiment, one of the four main detectors in the LHC, is devoted to study CP violation and rare decays in the b and c-quark sectors. CP violation is one of the necessary ingredients to explain the difference between matter and anti-matter observed in the Universe, since they were created in equal amounts during the Big-Bang. According to the Standard Model, the CP violation in the charm sector is very small compared to the s and b systems. LHCb has the appropriate conditions to collect charm data with an outstanding statistics. So if it finds any asymmetry larger than the expected from the SM, it will open door to New Physics. We report a measurement of the branching fraction of the doubly Cabibbo suppressed mode D{sup +} {yields} K{sup -} K{sup +}K{sup +} relative to the Cabibbo-favored mode D{sup +} {yields} K{sup -} {pi}{sup +}{pi}- as a first step of a Dalitz plot analysis and CP violation measurement. Based on the signal signature, we choose the discriminating variables which distinguish between signal and background. We then select values (cuts) which allow us to not only select the signal but also maximize the statistical significance, so that, performing mass fits, we determine the yields. The efficiency was sub-divided into specific contributions, for instance, trigger and particle identification, because this way some of the contributions can be directly obtained from data and do not depend on the simulations. In this analysis we made use of 2011 LHCb data of about 1fb{sup -1} and due to the excellent performance of the LHC and LHCb we can improve the measurement of the branching fraction with respect to the previous experiments. (author)

  11. Nuclear reactions with <sup>11sup>C and <sup>14sup>O radioactive ion beams

    Energy Technology Data Exchange (ETDEWEB)

    Guo, Fanqing [Univ. of California, Berkeley, CA (United States)

    2004-01-01

    Radioactive ion beams (RIBs) have been shown to be a useful tool for studying proton-rich nuclides near and beyond the proton dripline and for evaluating nuclear models. To take full advantage of RIBs, Elastic Resonance Scattering in Inverse Kinematics with Thick Targets (ERSIKTT), has proven to be a reliable experimental tool for investigations of proton unbound nuclei. Following several years of effort, Berkeley Experiments with Accelerated Radioactive Species (BEARS), a RIBs capability, has been developed at the Lawrence Berkeley National Laboratory's 88-Inch Cyclotron. The current BEARS provides two RIBs: a <sup>11sup>C beam of up to 2x10<sup>8sup> pps intensity on target and an <sup>14sup>O beam of up to 3x10<sup>4sup> pps intensity. While the development of the <sup>11sup>C beam has been relatively easy, a number of challenges had to be overcome to obtain the <sup>14sup>O beam. The excellent <sup>11sup>C beam has been used to investigate several reactions. The first was the <sup>197sup>Au(>11sup>C,xn)>208-xnsup>At reaction, which was used to measure excitation functions for the 4n to 8n exit channels. The measured cross sections were generally predicted quite well using the fusion-evaporation code HIVAP. Possible errors in the branching ratios of ?? decays from At isotopes as well as the presence of incomplete fusion reactions probably contribute to specific overpredictions. <sup>15sup>F has been investigated by the p(<sup>14sup>O,p)14O reaction with the ERSIKTT technology. Several <sup>14sup>O+p runs have been performed. Excellent energy calibration was obtained using resonances from the p(<sup>14sup>N,p)>14sup>N reaction in inverse kinematics, and comparing the results to those obtained earlier with normal kinematics. The differences between <sup>14sup>N+p and <sup>14sup>O+p in the stopping power function have been evaluated for better energy calibration. After careful calibration, the energy levels of 15F

  12. alpha-decay spectroscopy of light odd-odd Bi isotopes - II sup 1 sup 8 sup 6 Bi and the new nuclide sup 1 sup 8 sup 4 Bi

    CERN Document Server

    Andreyev, A N; Ackermann, D; Münzenberg, G; Hessberger, F P; Hofmann, S; Kojouharov, I; Kindler, B; Lommel, B; Huyse, M; Vel, K V D; Duppen, P V; Heyde, Kris L G

    2003-01-01

    Alpha-decay of the new nuclide sup 1 sup 8 sup 4 Bi has been studied in the complete-fusion reaction sup 9 sup 3 Nb( sup 9 sup 4 Mo, 3n) sup 1 sup 8 sup 4 Bi at the velocity filter SHIP. The evaporation residues were separated in-flight and subsequently identified on the basis of recoil-alpha, recoil-alpha-gamma analysis and excitation functions measurements. Two alpha-decaying isomeric states in sup 1 sup 8 sup 4 Bi with half-life values of 13(2) ms and 6.6(1.5) ms were identified. The alpha-branching ratio of sup 1 sup 8 sup 0 Tl was deduced for the first time as b subalpha = (2-12)%. Improved data on the fine-structure alpha-decay of sup 1 sup 8 sup 6 Bi were obtained in the sup 9 sup 3 Nb( sup 9 sup 5 Mo, 2n) sup 1 sup 8 sup 6 Bi reaction. A similarity of the decay energies and half-life values of sup 1 sup 8 sup 4 sup , sup 1 sup 8 sup 6 Bi is pointed out and a possible explanation for this effect is suggested.

  13. First observation of the decay B{sub s}{sup 0}{yields}K{sup Low-Asterisk 0}K{sup Macron Low-Asterisk 0}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B., E-mail: Bernardo.Adeva@usc.es [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); Archilli, F. [Laboratori Nazionali dell' INFN di Frascati, Frascati (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Collaboration: LHCb Collaboration; and others

    2012-03-13

    The first observation of the decay B{sub s}{sup 0}{yields}K{sup Low-Asterisk 0}K{sup Macron Low-Asterisk 0} is reported using 35 pb{sup -1} of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8{+-}7.5B{sub s}{sup 0}{yields}(K{sup +}{pi}{sup -})(K{sup -}{pi}{sup +}) events are observed within {+-}50 MeV/c{sup 2} of the B{sub s}{sup 0} mass and 746 MeV/c{sup 2}sup 2}, mostly coming from a resonant B{sub s}{sup 0}{yields}K{sup Low-Asterisk 0}K{sup Macron Low-Asterisk 0} signal. The branching fraction and the CP-averaged K{sup Low-Asterisk 0} longitudinal polarization fraction are measured to be B(B{sub s}{sup 0}{yields}K{sup Low-Asterisk 0}K{sup Macron Low-Asterisk 0})=(2.81{+-}0.46(stat.){+-}0.45(syst.){+-}0.34(f{sub s}/f{sub d})) Multiplication-Sign 10{sup -5} and f{sub L}=0.31{+-}0.12(stat.){+-}0.04(syst.).

  14. Determination of the half-life of sup 1 sup 0 sup 5 sup m Rh

    CERN Document Server

    Kronenberg, A K; Weber, R; Esterlund, R A; Patzelt, P

    1998-01-01

    Following a fast chemical separation of Ru isotopes from a fission-product mixture, sup 1 sup 0 sup 5 sup m Rh was periodically extracted from its precursor (4.44-h sup 1 sup 0 sup 5 Ru) for measurements of its half-life. The new value for the T sub 1 sub / sub 2 of sup 1 sup 0 sup 5 sup m Rh of (43.0+-0.3) s resolves the long-standing conflict in the literature between the two earlier measured values of 45 and 30 s.

  15. Measurement of the differential branching fraction of the decay Λ{sub b}{sup 0}→Λμ{sup +}μ{sup −}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2013-08-09

    The differential branching fraction of the decay Λ{sub b}{sup 0}→Λμ{sup +}μ{sup −} is measured as a function of the square of the dimuon invariant mass, q{sup 2}. A yield of 78±12Λ{sub b}{sup 0}→Λμ{sup +}μ{sup −} decays is observed using data, corresponding to an integrated luminosity of 1.0 fb{sup −1}, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. A significant signal is found in the q{sup 2} region above the square of the J/ψ mass, while at lower-q{sup 2} values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over q{sup 2}, while excluding the J/ψ and ψ(2S) regions, gives a branching fraction of B(Λ{sub b}{sup 0}→Λμ{sup +}μ{sup −})=(0.96±0.16(stat)±0.13(syst)±0.21(norm))×10{sup −6}, where the uncertainties are statistical, systematic and due to the normalisation mode, Λ{sub b}{sup 0}→J/ψΛ, respectively.

  16. Inner ionization in A sup I sup I B sup V sup I

    CERN Document Server

    Komashchenko, A V; Kolezhuk, K V; Sheremetova, G I; Fursenko, V D; Bobrenko, Y N

    2002-01-01

    The dependences of the sensitivity of the p-Cu sub 1 sub . sub 8 S/n-A sup I sup I B sup V sup I -type surface-barrier heterostructures on the energy of exciting photons or accelerated monoenergetic electron beams are investigated. A technique for determination of the mean internal ionization energy epsilon in direct-gap A sup I sup I B sup V sup I compounds is suggested and epsilon values are found experimentally. It is shown that the relationship between epsilon and the semiconductor energy gap E sub g is given by the following expression epsilon 2.5E sub g

  17. Search for the B{sup 0}{sub d,s}→K{sup *0}K{sup 0}{sub S} decays at LHCb

    Energy Technology Data Exchange (ETDEWEB)

    Fontana, Marianna

    2014-12-17

    The search for the previously unobserved B{sup 0}{sub d,s}→K{sup *0}K{sup 0}{sub S} decays is performed at the LHCb experiment, using proton-proton collisions at a centre of mass energy of √(s)=7 TeV. These decays provide a fertile ground in the search of New Physics in CP violation measurements. The data sample was recorded in 2011 and corresponds to an integrated luminosity of 1 fb{sup -1}. The first observation of the B{sub s}{sup 0}→K{sup *0}K{sub S}{sup 0} decay is reported. A measurement of the limit and the branching fraction relative to the B{sup 0}→K{sup 0}{sub S}π{sup +}π{sup -} decay yields the following results: (B(B{sup 0} → K{sup *0}K{sub S}{sup 0}))/(B(B{sup 0} → K{sub S}{sup 0}π{sup +}π{sup -}))<0.12(0.15) at 90% (95%) CL (B(B{sub s}{sup 0} → K{sup *0}K{sub S}{sup 0}))/(B(B{sup 0} → K{sub S}{sup 0}π{sup +}π{sup -}))=0.22±0.06(stat)±0.02(syst)±0.01(f{sub s}/f{sub d}), where the first uncertainty is statistical, the second systematic and the third comes from the uncertainty on the hadronisation fraction.

  18. Search for B {yields} K{ell}{sup +}{ell}{sup -} and B {yields} K*(892){ell}{sup +}{ell}{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.

    2004-02-12

    The authors present preliminary results from a search for the flavor-changing neutral current decays B {yields} K{ell}{sup +}{ell}{sup -} and B {yields} K*(892){ell}{sup +}{ell}{sup -} using a sample of 22.7 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II B Factory. They have reconstructed the following final states: B{sup +} {yields} K{sup +}{ell}{sup +}{ell}{sup -}, B{sup 0} {yields} K{sup 0}{ell}{sup +}{ell}{sup -} (K{sub s}{sup 0} {yields} {pi}{sup +} {pi}{sup -}), B{sup +} {yields} K*{sup +}{ell}{sup +}{ell}{sup -} (K*{sup +} {yields} K{sub s}{sup 0}{pi}{sup +}), and B{sup 0} {yields} K*{sup 0}{ell}{sup +}{ell}{sup -} (K*{sup 0} {yields} K{sup +}{pi}{sup -}), where {ell}{sup +}{ell}{sup -} is either an e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} pair. They obtain the 90% C.L. upper limits {Beta}(B {yields} K{ell}{sup +}{ell}{sup -}) < 0.6 x 10{sup -6} and {Beta}(B {yields} K*{ell}{sup +}{ell}{sup -}) < 2.5 x 10{sup -6}, close to the Standard Model predictions for these branching fractions.

  19. Automatic sup sup 1 sup sup 8 F positron source supply system for a monoenergetic positron beam

    CERN Document Server

    Saito, F; Itoh, Y; Goto, A; Fujiwara, I; Kurihara, T; Iwata, R; Nagashima, Y; Hyodo, T

    2000-01-01

    A system which supplies an intense sup sup 1 sup sup 8 F (half life 110 min) positron source produced by an AVF cyclotron through sup sup 1 sup sup 8 O(p,n) sup sup 1 sup sup 8 F reaction has been constructed. Produced sup sup 1 sup sup 8 F is transferred to a low background experiment hall through a capillary. It is electro-deposited on a graphite rod and used for a source of a slow positron beam. In the meantime the next batch of target sup sup 1 sup sup 8 O water is loaded and proton irradiation proceeds. This system makes it possible to perform continuous positron beam experiments using the 18 F positron source.

  20. First observation of the decay $\\bar{B}$$0\\atop{s}$ →; D$+\\atop{s}$ K<sup>∓> and measurement of B($\\bar{B}$$0\\atop{s}$ →; D$±\\atop{s}$K<sup>∓>)/Br($\\bar{B}$$0\\atop{s}$→; D$+\\atop{s}$ π<sup>->)

    Energy Technology Data Exchange (ETDEWEB)

    Muelmenstaedt, Johannes [Univ. of California, Berkeley, CA (United States)

    2007-01-01

    We present the first observation of the decay $\\bar{B}$$0\\atop{s}$ → D$+\\atop{s}$ K<sup>∓> and measure the relative branching fraction of $\\bar{B}$$0\\atop{s}$ → D$+\\atop{s}$ K<sup>∓> to $\\bar{B}$$0\\atop{s}$ → D$+\\atop{s}$ π<sup>->. The measurement of the relative branching fraction is performed by applying a fit in invariant mass and specific ionization to 1.2 fb<sup>-1sup> of Ds(φπ)X data collected with the CDF II detector in pp collisions at √s = 1.96 TeV at the Fermilab Tevatron collider. We measure B($\\bar{B}$$0\\atop{s}$ → D± s K∓¢/B($\\bar{B}$$0\\atop{s}$ → D$+\\atop{s}$ π<sup>->) = 0.107±0.019(stat)±0.008(sys). The statistical significance of the $\\bar{B}$$0\\atop{s}$ → D$+\\atop{s}$ K<sup>∓> signal is 7.9σ. To cross-check our analysis method, we also measure B($\\bar{B0}$ → D<sup>+K->)/B($\\bar{B0}$ → D<sup>+π->) and B($\\bar{B0}$ → D<sup>*+K->)/B($\\bar{B0}$ → D<sup>*+π->) and verify that our results are in agreement with the world average.

  1. Precision measurement of σ(e{sup +}e{sup −}→π{sup +}π{sup −}γ)/σ(e{sup +}e{sup −}→μ{sup +}μ{sup −}γ) and determination of the π{sup +}π{sup −} contribution to the muon anomaly with the KLOE detector

    Energy Technology Data Exchange (ETDEWEB)

    Babusci, D. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Badoni, D. [Dipartimento di Fisica dell' Università “Tor Vergata”, Roma (Italy); INFN Sezione Roma Tor Vergata, Roma (Italy); Balwierz-Pytko, I. [Institute of Physics, Jagiellonian University, Cracow (Poland); Bencivenni, G. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Bini, C. [Dipartimento di Fisica dell' Università “Sapienza”, Roma (Italy); INFN Sezione Roma, Roma (Italy); Bloise, C.; Bossi, F. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Branchini, P. [INFN Sezione Roma Tre, Roma (Italy); Budano, A. [Dipartimento di Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione Roma Tre, Roma (Italy); Caldeira Balkeståhl, L. [Department of Physics and Astronomy, Uppsala University, Uppsala (Sweden); Capon, G. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Ceradini, F. [Dipartimento di Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione Roma Tre, Roma (Italy); Ciambrone, P. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Curciarello, F. [Dipartimento di Fisica e Scienze della Terra dell' Università di Messina, Messina (Italy); INFN Sezione Catania, Catania (Italy); Czerwiński, E.; Dané, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Leo, V. [Dipartimento di Fisica e Scienze della Terra dell' Università di Messina, Messina (Italy); INFN Sezione Catania, Catania (Italy); De Lucia, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Robertis, G. [INFN Sezione Bari, Bari (Italy); and others

    2013-03-26

    We have measured the ratio σ(e{sup +}e{sup −}→π{sup +}π{sup −}γ)/σ(e{sup +}e{sup −}→μ{sup +}μ{sup −}γ), with the KLOE detector at DAΦNE for a total integrated luminosity of ∼240 pb{sup −1}. From this ratio we obtain the cross section σ(e{sup +}e{sup −}→π{sup +}π{sup −}). From the cross section we determine the pion form factor |F{sub π}|{sup 2} and the two-pion contribution to the muon anomaly a{sub μ} for 0.592sup ππ}a{sub μ}=(385.1±1.1{sub stat}±2.7{sub sys+theo})×10{sup −10}. This result confirms the current discrepancy between the Standard Model calculation and the experimental measurement of the muon anomaly.

  2. Measurement of B<sup>0sup> and B<sup>+> Lifetimes using Semileptonic Decays at CDF

    Energy Technology Data Exchange (ETDEWEB)

    Clark, David K. [Brandeis Univ., Waltham, MA (United States)

    2010-01-01

    Lifetime measurements for B<sup>0sup> and B<sup>+> are presented using semileptonic decays of B mesons from 360 pb<sup>-1sup> of data collected by CDF's lepton plus displaced track trigger. The decays B → ℓνDX, where D is either D <sup>+>, D<sup>0sup>, or D<sup>* +sup>, are partially reconstructed from a muon or electron, a displaced track, and a fully reconstructed charm meson. The B <sup>0sup> and B<sup>+> lifetimes are obtained from an unbinned maximum-likelihood fit to the proper decay length distributions. The measured lifetimes are τB 0 = 1.527 ± 0.012(stat.) ± 0.023( syst.)ps and τB + = 1.629 ± 0.013(stat.) ± 0.025( syst.)ps.

  3. The non-analog double charge exchange transition /sup 12/C(π/sup +/,π/sup -/)/sup 12/O/sub (g.s.)/ and /sup 16/O(π/sup +/,π/sup -/)/sup 16/Ne/sub (g.s.)/

    International Nuclear Information System (INIS)

    Wei-hsing, M.; Si-wen, W.; Gao-you, Z.; Chung-Kuang, C.; Zhen-rong, Y.; Shu-ping, Z.

    1986-01-01

    We proposed six possible reason exchange current mechanism for pion induced non-analog double charge exchange transition on /sup 12/C(π/sup +/, π/sup -/)/sup 12/O(g.s.) and /sup 16/O(π/sup +/, π/sup -/)/sup 16/N/sub e/(g.s.). Under the model, the authors calculated 164 MeV angular distribution. The theoretical results are compared with the existed data and are in a good agreement with the experimental data available. It strongly indicates that the non-analog DCX process is basically a diffractive process through double isobar excitation on a single nucleon and the dominant contribution to the process comes from one of the six diagrams, that is a π/sup +/ collides with a neutron to excite this neutron into an isobar Δ(1232) with charge of one unit; subsequently, the Δ/sup +/ decays to give π/sup +/Δ/sup o/ and then produced π/sup +/ is absorbed by the second target neutron which will be then turned to a proton. Meanwhile the traveling Δ/sup o/ finally decays into π/sup -/P so that the course of the process under consideration here is ended

  4. Prospects for measuring the branching ratio of the rare B{sup 0}{sub s}{yields}{mu}{sup +}{mu}{sup -} decay with the ATLAS experiment

    Energy Technology Data Exchange (ETDEWEB)

    Sipica, Valentin

    2011-09-15

    The Large Hadron Collider (LHC) located at the CERN laboratory in Geneva provides p-p collisions at a centre-of-mass energy of {radical}(s)=7 TeV. The study of the rare B{sup 0}{sub s}{yields}{mu}{sup +}{mu}{sup -} decay is among the research topics of ATLAS, one of the main experiments at the LHC. This decay is highly suppressed in the Standard Model of particle physics and may give an indirect evidence for New Physics models. This PhD thesis investigates prospects for measuring the branching ratio of the B{sup 0}{sub s}{yields}{mu}{sup +}{mu}{sup -} decay with the ATLAS experiment. The analysis is based on Monte Carlo data, with p-p collisions generated at a centre-of-mass energy of {radical}(s)=10 TeV. The strategy employed is to calculate the B{sup 0}{sub s}{yields}{mu}{sup +}{mu}{sup -} branching ratio relative to the branching ratio of the B{sup +}{yields} J/{psi}({mu}{sup +}{mu}{sup -})K{sup +} decay. The dominant background channel is the b anti b{yields}{mu}{sup +}{mu}{sup -}X combinatorial background. True B{sup 0}{sub s}{yields}{mu}{sup +}{mu}{sup -} decay candidates are separated from the much larger amount of combinatorial background events using several discriminating quantities. Upper limits on the B{sup 0}{sub s} {yields} {mu}{sup +}{mu}{sup -} branching ratio are computed using a Bayesian and a frequentist method. The expected precision of the branching ratio measurement is estimated for different values of the integrated luminosity. An expected upper limit on the branching ratio is computed to BR(B{sup 0}{sub s}{yields}{mu}{sup +}{mu}{sup -})<3.8 x 10{sup -8} at a 95% confidence level for 1 fb{sup -1}. The precision of the ATLAS measurement of the branching ratio will reach a level compatible with the best current measurements with about 2-5 fb{sup -1} of data.

  5. Simple description of the Jsup(P)=1/sup +/K/sup + -/. pi. /sup +/. pi. /sup -/ system in the reactions K/sup + -/p. -->. K/sup + -/. pi. /sup +/. pi. /sup -/p

    Energy Technology Data Exchange (ETDEWEB)

    Carnegie, R K; Cashmore, R J; Davier, M; Dunwoodie, W M; Lasinski, T A; Leith, D W.G.S.; Williams, S H [Stanford Linear Accelerator Center, Calif. (USA)

    1977-09-12

    A model in which Q/sub 1/ and Q/sub 2/ resonance contributions add coherently to a Gaussian background is shown to reproduce the mass dependence of the Jsup(P)=1/sup +/K*..pi.. and rhoK partial waves in K/sup + -/p..-->..K/sup + -/..pi../sup +/..pi../sup -/p at 13 GeV/c. Through a fit to the data, the mass and total width for Q/sub 1/ are found to be m=1289+-3+-(25) MeV, GAMMA=150+-9(+-70) MeV and for Q/sub 2/, m=1404+-3(+-10) MeV, GAMMA=142+-4(+-15) MeV, where estimated systematic errors are given in parentheses. While a significant background is required for the 1/sup +/K*..pi.. system, none is needed for the 1/sup +/rhoK system.

  6. Search for the B{sub s}{sup 0} →η{sup ′}ϕ decay

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Collaboration: The LHCb collaboration; and others

    2017-05-31

    A search for the charmless B{sub s}{sup 0} →η{sup ′}ϕ decay is performed using pp collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb{sup −1}. No signal is observed and upper limits on the B{sub s}{sup 0} →η{sup ′}ϕ branching fraction are set to 0.82×10{sup −6} at 90% and 1.01×10{sup −6} at 95% confidence level.

  7. Measurement of the B{sub s} oscillations with the semileptonic deacy B{sup 0}{sub s} {yields} D{sup -}{sub s} ({phi}{pi}{sup -}) {mu}{sup +}{nu}{sub {mu}} with the DOe detector; Messung der B{sub s}-Oszillation mit dem semileptonischen Zerfall B{sup 0}{sub s} {yields} D{sup -}{sub s} ({phi}{pi}{sup -}) {mu}{sup +}{nu}{sub {mu}} mit dem DOe-Detektor

    Energy Technology Data Exchange (ETDEWEB)

    Ay, C.

    2006-07-01

    in this thesis the measurement of B{sub s} oscillations by means of the decay B{sub s}{yields}D{sub s}{sup -}({phi}{pi}{sup -}){sub {mu}}{sup +}X at the Tevatron at a c. m. energy of {radical}(s)=1.96 TeV is described. From the results a lower limit of the oscillation frequency of {delta}m{sub s}>15.5 ps{sup -1} has been derived. (HSI)

  8. Measurement of the CP-violating phase {phi}{sub s} in B{sup Macron }{sub s}{sup 0}{yields}J/{psi}{pi}{sup +}{pi}{sup -} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); Archilli, F. [Laboratori Nazionali dell' INFN di Frascati, Frascati (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); and others

    2012-07-18

    Measurement of the mixing-induced CP-violating phase Greek-Small-Letter-Phi {sub s} in B{sub 0}{sup s} decays is of prime importance in probing new physics. Here 7421 {+-} 105 signal events from the dominantly CP-odd final state J/ Greek-Small-Letter-Psi Greek-Small-Letter-Pi {sup +} Greek-Small-Letter-Pi {sup -} are selected in 1 fb{sup -}1 of pp collision data collected at {radical}s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Greek-Small-Letter-Phi {sub s} = -0.019{sup +0.173+0.004}{sub -0.174-0.003} rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.

  9. Gamma-ray deexcitation of 0/sup +/, 2/sup +/ states in /sup 188/ /sup 190/Os

    Energy Technology Data Exchange (ETDEWEB)

    Macphail, M R; Casten, R F; Kane, W R [Brookhaven National Lab., Upton, N.Y. (USA)

    1975-12-08

    The ..gamma..-ray deexcitation of eight 0/sup +/ states in /sup 188/ /sup 190/Os was studied with the (n,..gamma..) reaction. For all eight 0/sup +/ states the depopulation was primarily to the 2/sup +//sub ..gamma../ rather than to the 2/sup +//sub g/ level. The 2/sup +/ level above the lowest excited 0/sup +/ state in each nucleus was found to decay predominantly to the excited 0/sup +/ level. Comparisons of these results to the longitudinal correspondence model and to the calculations of Kumar and Barranger are made.

  10. Angular analysis and differential branching fraction of the decay B{sub s}{sup 0}→ϕμ{sup +}μ{sup −}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Collaboration: The LHCb collaboration; and others

    2015-09-25

    An angular analysis and a measurement of the differential branching fraction of the decay B{sub s}{sup 0}→ϕμ{sup +}μ{sup −} are presented, using data corresponding to an integrated luminosity of 3.0 fb{sup −1} of pp collisions recorded by the LHCb experiment at √s=7 and 8 TeV. Measurements are reported as a function of q{sup 2}, the square of the dimuon invariant mass and results of the angular analysis are found to be consistent with the Standard Model. In the range 1sup 2}<6 GeV{sup 2}/c{sup 4}, where precise theoretical calculations are available, the differential branching fraction is found to be more than 3 σ below the Standard Model predictions.

  11. Coulomb excitation of /sup 182/ /sup 184/ /sup 186/W and /sup 166/Er with /sup 4/He and /sup 16/O ions

    Energy Technology Data Exchange (ETDEWEB)

    McGowan, F K; Milner, W T; Sayer, R O; Robinson, R L; Stelson, P H [Oak Ridge National Lab., Tenn. (USA)

    1977-10-10

    The Coulomb excitation reaction induced by /sup 4/He ions selectively excites 2/sup +/ and 3/sup -/ states by direct E2 and E3 Coulomb excitation. In this paper, new results are presented from ..gamma..-ray spectroscopy with 15 MeV /sup 4/He ions on a natural abundance target of W. In particular, a 3/sup -/ state in each isotope, /sup 182/ /sup 184/ /sup 186/W, was observed by direct E3 excitation. In addition to obtaining B(Elambda, 0 ..-->.. J = lambda for excitation of each state, information on the reduced transition probabilities for the different decay modes of these states is given. The Coulomb excitation probabilities of the 2'/sup +/ states at 786 keV in /sup 166/Er and at 737 keV in /sup 186/W were measured with /sup 16/O and /sup 4/He ions by the backscattered particle-gamma coincidence method in order to determine the static electric quadrupole moment Qsub(2'). For /sup 166/Er, Qsub(2')=2.11+-0.37 e.b which is in agreement with (Qsub(2'))sub(rot) and for /sup 186/W, Qsub(2')=1.17+-0.30 e.b which is in agreement with Kumar-Baranger model calculations and is significantly smaller than (Qsub(2'))sub(rot). This deviation of the measured Qsub(2') from (Qsub(2'))sub(rot) implies in the framework of the Kumar-Baranger calculations a strong coupling between ..beta..- and ..gamma..-vibrational bands. On the other hand, the observed upper limit for B(E2, 2'' ..-->.. 2') does not confirm this implication.

  12. Quinone 1 e <sup>–> and 2 e <sup>–> /2 H <sup>+> Reduction Potentials: Identification and Analysis of Deviations from Systematic Scaling Relationships

    Energy Technology Data Exchange (ETDEWEB)

    Huynh, Mioy T.; Anson, Colin W.; Cavell, Andrew C.; Stahl, Shannon S.; Hammes-Schiffer, Sharon

    2016-11-10

    Quinones participate in diverse electron transfer and proton-coupled electron transfer processes in chemistry and biology. An experimental study of common quinones reveals a non-linear correlation between the 1 e<sup>–> and 2 e<sup>–>/2 H<sup>+> reduction potentials. This unexpected observation prompted a computational study of 128 different quinones, probing their 1 e<sup>–> reduction potentials, pKa values, and 2 e<sup>–>/2 H<sup>+> reduction potentials. The density functional theory calculations reveal an approximately linear correlation between these three properties and an effective Hammett constant associated with the quinone substituent(s). However, deviations from this linear scaling relationship are evident for quinones that feature halogen substituents, charged substituents, intramolecular hydrogen bonding in the hydroquinone, and/or sterically bulky substituents. These results, particularly the different substituent effects on the 1 e<sup>–> versus 2 e<sup>–> /2 H<sup>+> reduction potentials, have important implications for designing quinones with tailored redox properties.

  13. Inelastic excitation of sup 1 sup 8 sup 7 Re

    CERN Document Server

    Shizuma, T; Oshima, M; Matsuda, M; Hayakawa, T; Koizumi, M; Osa, A; Sugawara, M; Zhang, Y H; Liu, Z

    2003-01-01

    Excited states in sup 1 sup 8 sup 7 Re populated by inelastic scattering of a 500 MeV sup 8 sup 2 Se beam have been studied by means of in-beam gamma-ray spectroscopy. Levels built on the 5/2 sup + [402] and 9/2 sup - [514] one-quasiparticle states were measured up to I suppi = (21/2 sup +) and (21/2 sup -), respectively. In addition, several new levels including an isomer at 1682 keV with a half-life of 114(23) ns have been found. Quasiparticle configurations of the levels and the transition rates are discussed. (orig.)

  14. B{sup 0} → D{sup 0} anti D{sup 0}K{sup 0}, B{sup +} → D{sup 0} anti D{sup 0}K{sup +}, and the scalar D anti D bound state

    Energy Technology Data Exchange (ETDEWEB)

    Dai, L.R. [Liaoning Normal University, Department of Physics, Dalian (China); Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Departamento de Fisica Teorica y IFIC, Valencia (Spain); Xie, Ju-Jun [Chinese Academy of Sciences, Institute of Modern Physics, Lanzhou (China); Chinese Academy of Sciences, State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Beijing (China); Oset, E. [Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Departamento de Fisica Teorica y IFIC, Valencia (Spain); Chinese Academy of Sciences, Institute of Modern Physics, Lanzhou (China)

    2016-03-15

    We study the B{sup 0} decay to D{sup 0} anti D{sup 0}K{sup 0} based on the chiral unitary approach, which generates the X(3720) resonance, and we make predictions for the D{sup 0} anti D{sup 0} invariant mass distribution. From the shape of the distribution, the existence of the resonance below threshold could be induced. We also predict the rate of production of the X(3720) resonance to the D{sup 0} anti D{sup 0} mass distribution with no free parameters. (orig.)

  15. Study of the neutron-rich nuclei with N=21, sup 3 sup 5 Si and sup 3 sup 3 Mg, by beta decay of sup 3 sup 5 Al and sup 3 sup 3 Na

    CERN Document Server

    Nummela, S; Caurier, E; Courtin, S; Dessagne, P; Holmlund, E; Jokinen, A; Knipper, A; Le Scornet, G; Mieh, C; Nowacki, F; Lyapin, L G; Oinonen, M; Poirier, E; Radivojevic, Z; Ramdhane, M; Trzaska, W H; Walter, G; Äystö, J

    2002-01-01

    The first information on the level structure of the N=21 nuclei, sup 3 sup 5 Si and sup 3 sup 3 Mg, has been obtained by the beta decay study of sup 3 sup 5 Al and sup 3 sup 3 Na, produced by fragmentation of an UC target with 1.4 GeV protons at CERN/ISOLDE. The experimental technique involved beta-gamma, beta-gamma-gamma, and beta-n-gamma coincidences, neutron spectra being obtained by time of flight measurements. Gamma detection was made either using large Ge counters or small BaF sub 2 scintillators (for lifetime measurements). In the case of the sup 3 sup 5 Al decay, (T sub 1 sub / sub 2 =41.6(2.2) ms), a simple structure has been found for the level scheme of sup 3 sup 5 Si (Z=14, N=21) which has been interpreted with the level sequence : 7/2 sup - , 3/2 sup - and 3/2 sup + corresponding respectively to the ground state and the states at 910 and 974 keV. The life-time of the 974 keV [T sub 1 sub / sub 2 =5.9(6) ns] is found consistent with the proposed level scheme and multipolarities. The investigation ...

  16. Syntheses and crystal structures of BaAgTbS{sub 3}, BaCuGdTe{sub 3}, BaCuTbTe{sub 3}, BaAgTbTe{sub 3}, and CsAgUTe{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Prakash, Jai; Beard, Jessica C.; Ibers, James A. [Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113 (United States); Mesbah, Adel [Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113 (United States); ICSM-UMR 5257 CNRS/CEA/UM2/ENSCM, Bat 426, BP 17171, 30207 Bagnols/Ceze (France)

    2015-06-15

    Five new quaternary chalcogenides of the 1113 family, namely BaAgTbS{sub 3}, BaCuGdTe{sub 3}, BaCuTbTe{sub 3}, BaAgTbTe{sub 3}, and CsAgUTe{sub 3}, were synthesized by the reactions of the elements at 1173-1273 K. For CsAgUTe{sub 3} CsCl flux was used. Their crystal structures were determined by single-crystal X-ray diffraction studies. The sulfide BaAgTbS{sub 3} crystallizes in the BaAgErS{sub 3} structure type in the monoclinic space group C{sup 3},{sub 2h}-C2/m, whereas the tellurides BaCuGdTe{sub 3}, BaCuTbTe{sub 3}, BaAgTbTe{sub 3}, and CsAgUTe{sub 3} crystallize in the KCuZrS{sub 3} structure type in the orthorhombic space group D{sup 1},{sub 2}{sup 7},{sub h}-Cmcm. The BaAgTbS{sub 3} structure consists of edge-sharing [TbS{sub 6}{sup 9-}] octahedra and [AgS{sub 5}{sup 9-}] trigonal pyramids. The connectivity of these polyhedra creates channels that are occupied by Ba atoms. The telluride structure features {sup 2}{sub ∞}[MLnTe{sub 3}{sup 2-}] layers for BaCuGdTe{sub 3}, BaCuTbTe{sub 3}, BaAgTbTe{sub 3}, and {sup 2}{sub ∞}[AgUTe{sub 3}{sup 1-}] layers for CsAgUTe{sub 3}. These layers comprise [MTe{sub 4}] tetrahedra and [LnTe{sub 6}] or [UTe{sub 6}] octahedra. Ba or Cs atoms separate these layers. As there are no short Q..Q (Q = S or Te) interactions these compounds achieve charge balance as Ba{sup 2+}M{sup +}Ln{sup 3+}(Q{sup 2-}){sub 3} (Q = S and Te) and Cs{sup +}Ag{sup +}U{sup 4+}(Te{sup 2-}){sub 3}. (Copyright copyright 2015 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  17. The fission cross sections of /sup 230/Th, /sup 232/Th, /sup 233/U, /sup 234/U, /sup 236/U, /sup 238/U, /sup 237/Np, /sup 239/Pu and /sup 242/Pu relative /sup 235/U at 14. 74 MeV neutron energy

    Energy Technology Data Exchange (ETDEWEB)

    Meadows, J.W.

    1986-12-01

    The measurement of the fission cross section ratios of nine isotopes relative to /sup 235/U at an average neutron energy of 14.74 MeV is described with particular attention to the determination of corrections and to sources of error. The results are compared to ENDF/B-V and to other measurements of the past decade. The ratio of the neutron induced fission cross section for these isotopes to the fission cross section for /sup 235/U are: /sup 230/Th - 0.290 +- 1.9%; /sup 232/Th - 0.191 +- 1.9%; /sup 233/U - 1.132 +- 0.7%; /sup 234/U - 0.998 +- 1.0%; /sup 236/U - 0.791 +- 1.1%; /sup 238/U - 0.587 +- 1.1%; /sup 237/Np - 1.060 +- 1.4%; /sup 239/Pu - 1.152 +- 1.1%; /sup 242/Pu - 0.967 +- 1.0%. 40 refs., 11 tabs., 9 figs.

  18. The asymptotic 3-loop heavy flavor corrections to the charged current structure functions F{sup W{sup +-W{sup -}{sub L}}}(x,Q{sup 2}) and F{sup W{sup +-W{sup -}{sub 2}}}(x,Q{sup 2})

    Energy Technology Data Exchange (ETDEWEB)

    Behring, A.; Bluemlein, J.; Falcioni, G.; Freitas, A. de [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany); Manteuffel, A. von [Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy; Mainz Univ. (Germany). PRISMA Cluster of Excellence; Schneider, C. [Johannes Kepler Univ., Linz (Austria). Research Inst. for Symbolic Computation

    2016-09-15

    We calculate the massive Wilson coefficients for the heavy flavor contributions to the non-singlet charged current deep-inelastic scattering structure functions F{sup W{sup +}{sub L}}(x,Q{sup 2})-F{sup W{sup -}{sub L}}(x,Q{sup 2}) and F{sup W{sup +}{sub 2}}(x,Q{sup 2}) - F{sup W{sup -}{sub 2}}(x,Q{sup 2}) in the asymptotic region Q{sup 2}>>m{sup 2} to 3-loop order in Quantum Chromodynamics (QCD) at general values of the Mellin variable N and the momentum fraction x. Besides the heavy quark pair production, also the single heavy flavor excitation s→c contributes. Numerical results are presented for the charm quark contributions and consequences on the unpolarized Bjorken sum rule and Adler sum rule are discussed.

  19. Selenium and tellurium as carbon substitutes

    International Nuclear Information System (INIS)

    Knapp, F.F. Jr.

    1980-01-01

    This review has summarized structure-activity studies with 75 Se- and /sup 123m/Te-labeled radiopharmaceuticals in which the selenium or tellurium heteroatom has been inserted between carbon-carbon bonds. The agents that have been investigated in most detail include steroids for adrenal imaging and long-chain fatty acids, and a variety of other unique agents have also been studied. Because of the great versatility of the organic chemistry of selenium and tellurium, there is continuing interest in the preparation of radiopharmaceuticals labeled with 75 Se, 73 Se, and /sup 123m/Te. There are two important factors which will determine the extent of future interest in such agents. These include the necessity of a decrease in the cost of highly enriched 122 Te to make the reactor production of /sup 123m/Te cost effective. In addition, the potential preparation of large amounts of 73 Se should stimulate the development of 73 Se-labeled radiopharmaceuticals

  20. Half-life Measurements of {sup 6}He, {sup 16}N, {sup 19}O, {sup 20}F, {sup 28}Al, {sup 77m}Se and {sup 1}

    Energy Technology Data Exchange (ETDEWEB)

    Konijn, J; Malmskog, S

    1962-06-15

    The half-life of different isotopes, activated by neutrons in the reactor R2-0 by means of a pneumatic rabbit, have been measured with a pulse height analyzer working in its multiscale mode of operation. A Nal(Tl)-scintillation spectrometer was used as detector. Least squares analysis calculated by the Mercury computer were performed for each measurement. The following weighted mean values of the half-lives are obtained {sup 6}He: 0.862 {+-} 0.017 sec.; {sup 16}N: 7.31 {+-} 0.04 sec.; {sup 19}O: 29.1 {+-} 0.3 sec.; {sup 20}F: 11.56 {+-} 0.05 sec.; {sup 28}Al: 2.31 {+-} 0.01 min.; {sup 77m}Se: 18.83 - 0.04 sec.; and {sup 110}Ag: 24.42 {+-} 0.14 sec.

  1. The mass of sup 3 sup 2 Ar and sup 3 sup 3 Ar for fundamental tests

    CERN Document Server

    Blaum, K; Beck, D; Bollen, G; Herfurth, F; Kellerbauer, A G; Kluge, H J; Sauvan, E; Schwarz, S

    2003-01-01

    Masses of the short-lived radionuclides sup 3 sup 2 Ar (T sub 1 sub / sub 2 = 98 ms) sup 3 sup 3 Ar (T sub 1 sub / sub 2 = 173 ms) have been determined with the Penning trap mass spectrometer ISOLTRAP. Relative uncertainties of 6.0 x 10 sup - sup 8 (delta m = 1.8 keV) and 1.4 x 10 sup - sup 8 (delta m = 0.44 keV), respectively, have been achieved. At present, these new mass data serve as the most stringent test of the quadratic form of the isobaricmultiplet mass equation IMME. Furthermore, the improved accuracy for the mass of sup 3 sup 2 Ar yields a better constraint on scalar contributions to the weak interaction. New mass values have also been measured for sup 4 sup 4 Ar and sup 4 sup 5 Ar, and a 20 sigma deviation for sup 4 sup 4 Ar from the literature value was found and interpreted.

  2. Identification of the new isotope sup 2 sup 4 sup 1 Bk

    CERN Document Server

    Asai, M; Ichikawa, S; Nagame, Y; Nishinaka, I; Akiyama, K; Toyoshima, A; Kaneko, T; Sakama, M; Haba, H; Oura, Y; Kojima, Y; Shibata, M

    2003-01-01

    A new neutron-deficient berkelium isotope sup 2 sup 4 sup 1 Bk produced in the sup 2 sup 3 sup 9 Pu( sup 6 Li, 4n) reaction has been identified using a gas-jet coupled on-line isotope separator. Cm K and L X-rays associated with the EC decay of sup 2 sup 4 sup 1 Bk were observed in the mass-241 fraction, and three gamma transitions were attributed to the EC decay of sup 2 sup 4 sup 1 Bk through X-gamma coincidences. The half-life of sup 2 sup 4 sup 1 Bk was determined to be 4.6+-0.4 min which is 1/2-1/4 of that of theoretical predictions. The half-life value and the observed gamma transitions can be consistently explained as a consequence of the allowed EC transition of pi 7/2 sup + [633] -> nu 7/2 sup + [624]. (orig.)

  3. Ion-exchange separation of radioiodine and its application to production of {sup 124}I by alpha particle induced reactions on antimony

    Energy Technology Data Exchange (ETDEWEB)

    Shuza Uddin, Md. [Forschungszentrum Juelich (Germany). Inst. fuer Neurowissenschaften und Medizin, INM-5: Nuklearchemie; Atomic Energy Research Establishment, Inst. of Nuclear Science and Technology, Dhaka (Bangladesh); Qaim, Seyed M.; Spahn, Ingo; Spellerberg, Stefan; Scholten, Bernhard; Coenen, Heinz H. [Forschungszentrum Juelich (Germany). Inst. fuer Neurowissenschaften und Medizin, INM-5: Nuklearchemie; Hermanne, Alex [Vrije Univ. Brussel (Belgium). Cyclotron Lab.; Hossain, Syed Mohammod [Atomic Energy Research Establishment, Inst. of Nuclear Science and Technology, Dhaka (Bangladesh)

    2015-07-01

    The basic parameters related to radiochemical separation of iodine from tellurium and antimony by anion-exchange chromatography using the resin Amberlyst A26 were studied. The separation yield of {sup 124}I amounted to 96% and the decontamination factor from {sup 121}Te and {sup 122}Sb was > 10{sup 4}. The method was applied to the production of {sup 124}I via the {sup 123}Sb(α, 3n) reaction. In an irradiation of 110 mg of {sup nat}Sb{sub 2}O{sub 3} (thickness ∝0.08 g/cm{sup 2}) with 38 MeV α-particles at 1.2 μA beam current for 4 h, corresponding to the beam energy range of E{sub α} = 37 → 27 MeV, the batch yield of {sup 124}I obtained was 12.42 MBq and the {sup 125}I and {sup 126}I impurities amounted to 3.8% and 0.7%, respectively. The experimental batch yield of {sup 124}I amounted to 80% of the theoretically calculated value but the level of the radionuclidic impurities were in agreement with the theoretical values. About 96% of the radioiodine was in the form of iodide and the inactive impurities (Te, Sb, Sn) were below the permissible level. Due to the relatively high level of radionuclidic impurity the {sup 124}I produced would possibly be useful only for restricted local consumption or for animal experiments.

  4. Zeros of the pi /sup +/ pi /sup -/ to pi /sup +/ pi /sup -/ amplitude (from data on pp to pi /sup -/ pi /sup +/)

    CERN Document Server

    Bugg, D V

    1974-01-01

    Recent data on the reaction pp to pi /sup -/ pi /sup +/ show four conspicuous dips in the angular distribution at fixed values of nu =t- u. The conjecture is made that the channel pi /sup -/ pi /sup +/ to pi /sup -/ pi /sup +/ has zeros at the same nu values. Using data of the CERN-Munich group, one can follow the zeros through the whole Mandelstam plane. The zeros pass through the intersections of s and t channel poles, as the Veneziano model predicts; however, away from these intersections, they propagate in a fashion systematically quite different from Veneziano's ansatz. (10 refs).

  5. A search for the Standard Model Higgs boson in the process ZH → ℓ<sup>+ℓ->b$\\bar{b}$ in 4.1 fb<sup>-1sup> of CDF II data

    Energy Technology Data Exchange (ETDEWEB)

    Shalhout, Shalhout Zaki [Wayne State Univ., Detroit, MI (United States)

    2010-05-01

    The standard model of particle physics provides a detailed description of a universe in which all matter is composed of a small number of fundamental particles, which interact through the exchange of force - carrying gauge bosons (the photon, W <sup>±>, Z and gluons). The organization of the matter and energy in this universe is determined by the effects of three forces; the strong, weak, and electromagnetic. The weak and electromagnetic forces are the low energy manifestations of a single electro-weak force, while the strong force binds quarks into protons and neutrons. The standard model does not include gravity, as the effect of this force on fundamental particles is negligible. Four decades of experimental tests, spanning energies from a few electron-volts (eV) up to nearly two TeV, confirm that the universe described by the standard model is a reasonable approximation of our world. For example, experiments have confirmed the existence of the top quark, the W<sup>±> and the Z bosons, as predicted by the standard model. The latest experimental averages for the masses of the top quark, W<sup>±> and Z are respectively 173.1 ± 0.6(stat.) ± 1.1(syst.), 80.399 ± 0.023 and 91.1876 ± 0.0021 GeV/c<sup>2sup>. The SM is a gauge field theory of zero mass particles. However, the SM is able to accommodate particles with non-zero mass through the introduction of a theoretical Higgs field which permeates all of space. Fermions gain mass through interactions with this field, while the longitudinal components of the massive W<sup>±> and Z are the physical manifestations of the field itself. Introduction of the Higgs field, directly leads to the predicted existence of an additional particle, the Higgs boson. The Higgs boson is the only particle of the standard model that has not been observed, and is the only unconfirmed prediction of the theory. The standard model describes the properties of the Higgs boson in terms of its mass, which is a free

  6. Two neutrino double-β decay of 94 ≤ A ≤ 150 nuclei for the 0{sup +} → 2{sup +} transition

    Energy Technology Data Exchange (ETDEWEB)

    Singh, Yash Kaur; Chandra, R. [Babasaheb Bhimrao Ambedkar University, Department of Applied Physics, Lucknow (India); Raina, P.K. [Indian Institute of Technology, Department of Physics, Ropar, Rupnagar (India); Rath, P.K. [University of Lucknow, Department of Physics, Lucknow (India)

    2017-12-15

    Within the PHFB approach, the 0{sup +} → 2{sup +} transition of two neutrino double-β decay of {sup 94,96}Zr, {sup 100}Mo, {sup 104}Ru, {sup 110}Pd, {sup 128,130}Te and {sup 150}Nd isotopes is studied employing wave functions generated with four different parametrizations of the pairing plus multipole type of two-nucleon interaction and the summation method. In comparison to the 0{sup +} → 0{sup +} transition, the nuclear transition matrix elements M{sub 2ν} (2{sup +}) are quite sensitive to the deformation of the yrast 2{sup +} state. Consideration of the available theoretical and experimental results suggests that the observation of the 0{sup +} → 2{sup +} transition of 2νβ{sup -}β{sup -} decay may be possible in {sup 96}Zr, {sup 100}Mo, {sup 130}Te and {sup 150}Nd isotopes. The effect of deformation on the M{sub 2ν} (2{sup +}) is also studied. (orig.)

  7. Measurement of CP violation in B{sup 0}- anti B{sup 0} mixing using semileptonic decays at LHCb

    Energy Technology Data Exchange (ETDEWEB)

    Grillo, Lucia

    2015-07-22

    This thesis presents the measurement of the CP-violating asymmetry in B{sup 0}- anti B{sup 0} mixing using data corresponding to an integrated luminosity of 3.0 fb{sup -1} collected at the LHCb experiment in proton-proton collisions at the center-of-mass energies of 7 TeV and 8 TeV. This analysis uses untagged, semileptonic B{sup 0}→D{sup -}μ{sup +}ν{sup -} and B{sup 0}→D{sup *-}μ{sup +}ν{sup -} decays, where the D{sup -} decays into K{sup +}π{sup -}π{sup -}, and the D{sup *-} decays into anti D{sup 0}(→ K{sup +}π{sup -})π{sup -}. The neutrino in the semileptonic B decays is not reconstructed. A decay time dependent fit allows to disentangle the CP asymmetry from the possible B{sup 0}- anti B{sup 0} production asymmetry. Detection and reconstruction asymmetries are calibrated using promptly produced Cabibbo-favored D{sup +} decays, and inclusive secondary J/ψ decays. The CP-violating asymmetry is measured to be a{sup d}{sub sl}=(-0.02±0.19 (stat)±0.30(syst))%. This result is consistent with the Standard Model prediction, and it is the most precise measurement from a single experiment to date. This measurement is published in Physical Review Letters.

  8. Excitation functions and yields of proton induced reactions at intermediate energies leading to important diagnostics radioisotopes of {sup 52}Fe, {sup 77}Br, {sup 82}Rb, {sup 97}Ru, {sup 111}In, {sup 123}I, {sup 127}Xe, {sup 128}Cs, {sup 178}Ta and {sup 201}Tl

    Energy Technology Data Exchange (ETDEWEB)

    Rurarz, E. [Soltan Inst. for Nuclear Studies, Otwock-Swierk (Poland)

    1994-12-31

    This report describes investigations of the excitation functions of the proton induced reactions on 14 targets (Mn, Co, Br, Rb, {sup 99}Tc, {sup 113}Cd, {sup 114}Cd, Cd, I, Cs, Ta, {sup 206,207,208}Pb) leading directly or indirectly to the formation of radionuclides {sup 52}Fe, {sup 77}Br, {sup 82}Rb, {sup 97}Ru, {sup 111}In, {sup 123}I, {sup 127}Xe, {sup 128}Cs, {sup 178}Ta and {sup 201}Tl frequently used in diagnostic procedures of nuclear medicine. The measurements of the excitation functions were made over a wide proton energy range from the reaction threshold up to 100 MeV using the stacked foil (or pellet) technique. Small energy steps were used to allow for accurate determination of the structure of excitation functions. For {sup 97}Ru, {sup 111}In and {sup 127}Xe formation with protons, new reaction channels and targets were used and data concerning this method are published for the first time. The data for {sup 52}Fe, {sup 77}Br, {sup 82}Rb, {sup 123}I, {sup 128}Cs and {sup 201}Tl obtained in the present work for the E{sub p}=70-100 MeV region are also published for the first time. The measured excitation functions for the formation of desired (and undesired) radionuclides (altogether 28 excitation functions) are compared with the theoretical ones calculated on the basis of a hybrid model of nuclear reactions in the form of the Overlaid Alice computer code. In order to determine the contribution of the competitive reaction channels to the purity of the produced, desired radionuclide, the excitation functions of the accompanying reactions were also calculated. The 122 calculated excitation functions for the possible contaminant are given. The comparison of experimental excitation functions with the results of model calculations showed satisfactory agreement; no parameter adjustment for individual reaction products was undertaken. Production yields for 28 radionuclides mentioned above were determined (author). 262 refs, 65 figs, 34 tabs.

  9. Half-life Measurements of {sup 6}He, {sup 16}N, {sup 19}O, {sup 20}F, {sup 28}Al, {sup 77m}Se and {sup 110}Ag

    Energy Technology Data Exchange (ETDEWEB)

    Konijn, J; Malmskog, S

    1962-06-15

    The half-life of different isotopes, activated by neutrons in the reactor R2-0 by means of a pneumatic rabbit, have been measured with a pulse height analyzer working in its multiscale mode of operation. A Nal(Tl)-scintillation spectrometer was used as detector. Least squares analysis calculated by the Mercury computer were performed for each measurement. The following weighted mean values of the half-lives are obtained {sup 6}He: 0.862 {+-} 0.017 sec.; {sup 16}N: 7.31 {+-} 0.04 sec.; {sup 19}O: 29.1 {+-} 0.3 sec.; {sup 20}F: 11.56 {+-} 0.05 sec.; {sup 28}Al: 2.31 {+-} 0.01 min.; {sup 77m}Se: 18.83 - 0.04 sec.; and {sup 110}Ag: 24.42 {+-} 0.14 sec.

  10. Investigation of temperature effect on half-life periods of long-lived isomer sup 1 sup 8 sup 0 sup m Hf and sup 8 sup 7 sup m Sr

    CERN Document Server

    Alpatov, V G; Davydov, A V; Isaev, Y N; Kartashov, G R; Korotkov, M M; Samojlov, V M

    2001-01-01

    The experiments on measuring the half-life periods of the sup 1 sup 8 sup 0 sup m Hf and sup 8 sup 7 sup m Sr long-lived isomers at the room temperature and at 77 K with application of the HfO sub 2 , Sr(NO sub 3) sub 2 and SrCO sub 3 massive samples are described. The isomer states of the corresponding nuclei were formed by the samples irradiation through neutrons from the Pu-Be source. According to the Vysotski theory and other authors the surrounding of the gamma-active nuclei by a large number of the same nuclei in the basic state should lead to the T sub 1 sub / sub 2 growth due to distortion of the zero electromagnetic vacuum oscillations near the nuclear energy level value. Decrease in the sample temperature leads to the narrowing of the gamma-lines, especially for the Moessbauer low-energy transitions, which increases the resonance effect on the zero oscillations spectrum. Increase in the T sub 1 sub / sub 2 by 2.99 +- 0.87% was observed by cooling the sup 1 sup 8 sup 0 sup m Hf isomer sample, in the ...

  11. Search for B{sup 0}-->a{_}0{sup +}(980)pi{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Hoecker, Andreas

    2001-07-30

    We present preliminary results of a search for the decay B{sup 0} {yields} a{sub 0}{sup +}(980){pi}{sup -} among 22.7 million {Upsilon}(4S) {yields} B{bar B} pairs collected by the BABAR detector at PEP-II. Using improved background suppression techniques and optimal signal extraction for rare decay searches, an excess of events over expected background is observed at the level of 3.7 standard deviations. This corresponds to the branching fraction B(B{sup 0} {yields} a{sub 0}{sup +}(a{sub 0}{sup +} {yields} {eta}{pi}{sup +}){pi}{sup -}) = (6.2{sub -2}{sup +0} {+-} 1.1) x 10{sup -6}, where the first error is statistical and the second is systematic. The 90% confidence level upper limit is 11.5 x 10{sup -6}.

  12. Dose calibrator linearity test: {sup 99m}Tc versus {sup 18}F radioisotopes

    Energy Technology Data Exchange (ETDEWEB)

    Willegaignon, Jose; Coura-Filho, George Barberio; Garcez, Alexandre Teles, E-mail: willegaignon@hotmail.com [Instituto do Cancer do Estado de Sao Paulo Octavio Frias de Oliveira (ICESP), Sao Paulo, SP (Brazil); Sapienza, Marcelo Tatit; Buchpiguel, Carlos Alberto [Universidade de Sao Paulo (FM/USP), Sao Paulo, SP (Brazil). Fac. de Medicina; Alves, Carlos Eduardo Gonzalez Ribeiro; Cardona, Marissa Anabel Rivera; Gutterres, Ricardo Fraga [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil)

    2015-01-15

    Objective: the present study was aimed at evaluating the viability of replacing {sup 18}F with {sup 99m}Tc in dose calibrator linearity testing. Materials and methods: the test was performed with sources of {sup 99m}Tc (62 GBq) and {sup 18}F (12 GBq) whose activities were measured up to values lower than 1 MBq. Ratios and deviations between experimental and theoretical {sup 99m}Tc and {sup 18}F sources activities were calculated and subsequently compared. Results: mean deviations between experimental and theoretical {sup 99m}Tc and {sup 18}F sources activities were 0.56 (± 1.79)% and 0.92 (± 1.19)%, respectively. The mean ratio between activities indicated by the device for the {sup 99m}Tc source as measured with the equipment precalibrated to measure {sup 99m}Tc and {sup 18}F was 3.42 (± 0.06), and for the {sup 18}F source this ratio was 3.39 (± 0.05), values considered constant over the measurement time. Conclusion: the results of the linearity test using {sup 99m}Tc were compatible with those obtained with the {sup 18}F source, indicating the viability of utilizing both radioisotopes in dose calibrator linearity testing. Such information in association with the high potential of radiation exposure and costs involved in {sup 18}F acquisition suggest {sup 99m}Tc as the element of choice to perform dose calibrator linearity tests in centers that use {sup 18}F, without any detriment to the procedure as well as to the quality of the nuclear medicine service. (author)

  13. Search for a narrow baryonic state decaying to pK{sup 0}{sub S} and anti pK{sup 0}{sub S} in deep inelastic scattering at HERA

    Energy Technology Data Exchange (ETDEWEB)

    Abramowicz, H. [Tel Aviv Univ. (Israel). School of Physics; Max-Planck-Institute for Physics, Munich (Germany); Abt, I. [Max-Planck-Institute for Physics, Munich (Germany); Adamczyk, L. [AGH-Univ. of Science and Technology, Krakow (Poland). Faculty of Physics and Applied Computer Science; Collaboration: ZEUS Collaboration; and others

    2016-06-15

    A search for a narrow baryonic state in the pK{sup 0}{sub S} and anti pK{sup 0}{sub S} system has been performed in ep collisions at HERA with the ZEUS detector using an integrated luminosity of 358 pb{sup -1} taken in 2003-2007. The search was performed with deep inelastic scattering events at an ep centre-of-mass energy of 318 GeV for exchanged photon virtuality, Q{sup 2}, between 20 and 100 GeV{sup 2}. Contrary to evidence presented for such a state around 1.52 GeV in a previous ZEUS analysis using a sample of 121 pb{sup -1} taken in 1996-2000, no resonance peak was found in the p(anti p)K{sup 0}{sub S} invariant-mass distribution in the range 1.45-1.7 GeV. Upper limits on the production cross section are set.

  14. A Meaurement of the W<sup>+> W<sup>-> production cross section in p$\\bar{p}$ collisions at √s=1.96 TeV in the DiLepton channel and limits on anomalous WWZ/γ couplings

    Energy Technology Data Exchange (ETDEWEB)

    McGivern, Dustin [Univ. College London, Bloomsbury (United Kingdom)

    2005-12-23

    Measurements of the production cross section of W<sup>+> W<sup>-> pairs in p$\\bar{p}$ collisions at 1.96 TeV and limits on trilinear gauge boson coupling (TGC) parameters are presented. The data were recorded with the CDF experiment at Tevatron during the 2001 and 2002 data taking periods in which a total integrated luminosity of 184 pb<sup>-1sup> was collected. The data sample was filtered for events with two leptonic w boson decays where the charged leptons can be either electrons or muons. 17 events are observed against an expected background of 5.0$+2.2\\atop{-0.8}$ events. The resulting cross-section is found to be σ(p$\\bar{p}$ → W<sup>+> W<sup>->) = 14.5$+5.8\\atop{-5.1}$(stat)$+1.8\\atop{-3.0}$(syst) ± 0.9(lum) pb and agrees well with the Standard Model expectation. Limits on the TGC parameters Δκ and λ are set under both the equal coupling scheme, that assumes the W boson couples identically to the Z and γ, and the HISZ coupling scheme, that requires the couplings to respect SU(2)L x &(1)Y gauge symmetry. In both cases this is achieved by using a likelihood fit to the lepton-PT distribution of the 17 candidate events. The resulting limits are found to be: -0.4 < Δκ < +0.6(λ = 0); -0.3 < λ < +0.4 (Δκ = 0) for the EQUAL couplings and -0.7 < Δκ < +0.9 (λ = 0); -0.4 < λ < +0.4 (Δκ = 0) for the HISZ couplings.

  15. Measurements of the decays {tau}{sup {minus}}{r_arrow}{ital h}{sup {minus}}{ital h}{sup +}{ital h}{sup {minus}}{nu}{sub {tau}} and {tau}{sup {minus}}{r_arrow}{ital h}{sup {minus}}{ital h}{sup +}{ital h}{sup {minus}}{pi}{sup 0}{nu}{sub {tau}}

    Energy Technology Data Exchange (ETDEWEB)

    Balest, R.; Cho, K.; Ford, W.T.; Lohner, M.; Park, H.; Rankin, P.; Smith, J.G.; Alexander, J.P.; Bebek, C.; Berger, B.E.; Berkelman, K.; Bloom, K.; Browder, T.E.; Cassel, D.G.; Cho, H.A.; Coffman, D.M.; Crowcroft, D.S.; Dickson, M.; Drell, P.S.; Dumas, D.J.; Ehrlich, R.; Elia, R.; Gaidarev, P.; Garcia-Sciveres, M.; Gittelman, B.; Gray, S.W.; Hartill, D.L.; Heltsley, B.K.; Henderson, S.; Jones, C.D.; Jones, S.L.; Kandaswamy, J.; Katayama, N.; Kim, P.C.; Kreinick, D.L.; Lee, T.; Liu, Y.; Ludwig, G.S.; Masui, J.; Mevissen, J.; Mistry, N.B.; Ng, C.R.; Nordberg, E.; Patterson, J.R.; Peterson, D.; Riley, D.; Soffer, A.; Avery, P.; Freyberger, A.; Lingel, K.; Prescott, C.; Rodriguez, J.; Yang, S.; Yelton, J.; Brandenburg, G.; Cinabro, D.; Liu, T.; Saulnier, M.; Wilson, R.; Yamamoto, H.; Bergfeld, T.; Eisenstein, B.I.; Ernst, J.; Gladding, G.E.; Gollin, G.D.; Palmer, M.; Selen, M.; Thaler, J.J.; Edwards, K.W.; McLean, K.W.; Ogg, M.; Bellerive, A.; Britton, D.I.; Hyatt, E.R.F.; Janicek, R.; MacFarlane, D.B.; Patel, P.M.; Spaan, B.; Sadoff, A.J.; Ammar, R.; Baringer, P.; Bean, A.; Besson, D.; Coppage, D.; Copty, N.; Davis, R.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, N.; Kubota, Y.; Lattery, M.; Momayezi, M.; Nelson, J.K.; Patton, S.; Poling, R.; Savinov, V.; Schrenk, S.; Wang, R.; Alam, M.S.; Kim, I.J.; Ling, Z.; Mahmood, A.H.; O`Neill, J.J.; Severini, H.; Sun, C.R.; Wappler, F.; Crawford, G.; Fulton, R.; Fujino, D.; Gan, K.K.; Honscheid, K.; Kagan, H.; Kass, R.; Lee, J.; Sung, M.; White, C.; Wolf, A.; Zoeller, M.M.; Fu, X.; Nemati, B.; Ross, W.R.; Skubic, P.; Wood, M.; Bishai, M.; Fast, J.; Gerndt, E.; Hinson, J.W.; Miao, T.; Miller, D.H.; Modesitt, M.; Shibata, E.I.; Shipsey, I.P.J.; Wang, P.N.; Gibbons, L.; Johnson, S.D.; Kwon, Y.; Roberts, S.; Thorndike, E.H.; Coan, T.E.; Dominick, J.; Fadeyev, V.; Korolkov, I.; Lambrecht, M.; Sanghera, S.; Shelkov, V.; Skwarnicki, T.; Stroynowski, R.; Volobouev, I.; Wei, G.; Artuso, M.; Gao, M.; Goldberg, M.; He, D.; (CLEO Colla...

    1995-11-20

    We use a data sample of 2.8{times}10{sup 6} produced {tau}-pair events, obtained with the CLEO II detector, to measure {ital B}{bold (}{tau}{sup {minus}}{r_arrow}{ital h}{sup {minus}}{ital h}{sup +}{ital h}{sup {minus}}({pi}{sup 0}){nu}{sub {tau}}{bold )}, where {ital h} refers to either a charged {pi} or {ital K}. These branching fractions are measured with samples of lepton-tagged and 3 vs 3 events. We find {ital B}({tau}{sup {minus}}{r_arrow}{ital h}{sup {minus}}{ital h}{sup +}{ital h}{sup {minus}}{nu}{sub {tau}})=0.0951{plus_minus}0.0007 m*0.0020 and {ital B}({tau}{sup {minus}}{r_arrow}{ital h}{sup {minus}}{ital h}{sup +}{ital h}{sup {minus}}{pi}{sup 0}{nu}{sub {tau}})=0.0423{plus_minus} .0006{plus_minus}0.0022. We also measure {ital B}({tau}{sup {minus}}{r_arrow}{omega}{ital h}{sup {minus}}{nu}{sub {tau}})=0.0195{plus_minus}0.0007{plus_minus}0.0011 {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.

  16. Computer simulation and data compilation of sputtering yield by hydrogen isotopes ({sup 1}H{sup +}, {sup 2}D{sup +}, {sup 3}T{sup +}) and helium ({sup 4}He{sup +}) ion impact from monatomic solids at normal incidence

    Energy Technology Data Exchange (ETDEWEB)

    Yamamura, Yasunori; Sakaoka, Kazuho; Tawara, Hiro

    1995-10-01

    The ion-induced sputtering yields from monatomic solids at normal incidence are presented graphically for light-ion ({sup 1}H{sup +}, {sup 2}D{sup +}, {sup 3}T{sup +}, {sup 4}He{sup +}) bombardment on various target materials as a function of the incident ion energy. To supplement the experimental data, the sputtering yields are calculated by the Monte Carlo simulation code ACAT for all possible light ion-target combinations. Each graph shows the available experimental and ACAT data points, together with the sputtering yield calculated by the Yamamura and Tawara empirical formula. (author).

  17. cap alpha. -transfer reactions /sup 27/Al(/sup 6/Li, d)/sup 31/P, /sup 29/Si(/sup 6/Li, d)/sup 33/S and /sup 31/P(/sup 6/Li, d)/sup 35/Cl at 36 MeV. [Angular distributions, EFR DWBA, spectroscopic strengths

    Energy Technology Data Exchange (ETDEWEB)

    Eswaran, M A; Gove, H E; Cook, R; Sikora, B [Rochester Univ., NY (USA). Nuclear Structure Research Lab.

    1979-08-13

    The ..cap alpha..-transfer reactions /sup 27/Al(/sup 6/Li,d)/sup 31/P,/sup 29/Si(/sup 6/Li,d) /sup 33/S and /sup 31/P(Li,d)/sup 35/Cl have been studied at a /sup 6/Li energy of 36 MeV. Absolute cross sections and angular distributions have been measured and an exact finite-range distorted-wave Born approximation analysis assuming a direct cluster transfer has been used to extract from the data ..cap alpha..-particle spectroscopic strengths for levels populated in /sup 31/P, /sup 33/S and /sup 35/Cl in three reactions respectively. The results show that in the case of most of the low-lying excited states of /sup 31/P a single value of L of the transferred ..cap alpha..-particle contributes, though a multiplicity of L-values are allowed by angular momentum selection rules. It is also found that the ..cap alpha..-particle spectroscopic strength of the ground state of /sup 31/P is a factor of 2 more than the strengths of the ground states of /sup 33/S and /sup 35/Cl. The ..cap alpha..-spectroscopic strengths of ground states of these, as well as other odd-A s-d shell nuclei, are compared with the presently available shell model calculations.

  18. Measurement of the Λ$0\\atop{b}$ → Λ$+\\atop{c}$π<sup>-> branching ratio

    Energy Technology Data Exchange (ETDEWEB)

    Le, Yi [Johns Hopkins Univ., Baltimore, MD (United States)

    2003-01-01

    The authors present a measurement of the Λ$0\\atop{b}$ → Λ$+\\atop{c}$π<sup>-> branching ratio in p$\\bar{p}$ collisions at √s = 1.96 TeV using 65 pb<sup>-1sup> data collected by the Collider Detector at Fermilab (CDF).

  19. Standardisation of sup 9 sup 0 Sr, sup 6 sup 3 Ni and sup 5 sup 5 Fe by the 4 pi beta liquid scintillation spectrometry method with sup 3 H-standard efficiency tracing

    CERN Document Server

    Ceccatelli, A

    1999-01-01

    The 4 pi beta efficiency tracing liquid scintillation spectrometry method was applied with success, at ENEA, to the activity measurement of pure beta-emitters ( sup 9 sup 0 Sr and sup 6 sup 3 Ni) and electron-capturing nuclides ( sup 5 sup 5 Fe), using sup 3 H as tracer nuclide. The agreement of these measurements in comparison to other national metrology institutes was checked by means of two comparisons, carried out in 1996-1997. Furthermore a study of the stability of the prepared sources was performed and the dependence of the measured activity concentration on the quenching level was analysed. The radionuclides were standardised to a combined standard uncertainty of 0.14% for sup 9 sup 0 Sr, 0.55% for sup 6 sup 3 Ni and 1.18% for sup 5 sup 5 Fe.

  20. Calculation of neutron cross sections for sup 9 sup 0 Zr, sup 2 sup 0 sup 8 Pb and sup 2 sup 0 sup 9 Bi in the energy range of 0.5-25 MeV by using the optical model potentials

    CERN Document Server

    Miah, M M H; Faruque, M R I

    2003-01-01

    Neutron total cross sections and differential elastic scattering cross sections for the nuclides sup 9 sup 0 Zr, sup 2 sup 0 sup 8 Pb and sup 2 sup 0 sup 9 Bi were calculated using different global spherical optical potential (SOP) parameter sets at neutron energies from 0.5-25 MeV. Calculated cross sections for the corresponding nuclides were compared with their experimental data obtained by the EXFOR file to select the best fit parameter sets. It is found that the parameter sets of Ferer Rapaport for sup 9 sup 0 Zr and Bechetti and Greenless for sup 2 sup 0 sup 8 Pb and sup 2 sup 0 sup 9 Bi are the best fitted set to obtain the experimental data of total cross sections and angular distributions of these nuclides. (author)

  1. Search For the Rare Decay KL → π<sup>0sup>π>0sup

    Energy Technology Data Exchange (ETDEWEB)

    Smith, David Edward [Univ. of Virginia, Charlottesville, VA (United States)

    2006-08-01

    This thesis describes a search for the rare decay KL → π<sup>0sup>π>0sup>γ using data from the KTeV experiment, using the topology KL → π<sup>0sup>π$0\\atop{D}$γ (where π$0\\atop{D}$ → γe<sup>+e->). Due to Bose statistics and the real nature of the photon, the KL → π<sup>0sup>π>0sup>γ decay can proceed at lowest order only by the Cp conserving direct emission of an E2 photon. The decay vanishes to O(p<sup>4sup>) in chiral perturbation theory and is a probe of the theory to the sixth order. The primary background to this decay consists of KL → π<sup>0sup>π$0\\atop{D}$ events with one lost photon. The upper limit for the decay KL π<sup>0sup>π>0sup>γ presented in this thesis is 2.32 x 10<sup>-7sup> at the 90% confidence level. This upper limit was derived from both 1997 and 1999 data, using a blind analysis. The upper limit was derived from a Feldman-Cousins method, based on a weighted total of 0.53 data events in the signal region with an expected KL → π<sup>0sup>π>0sup>π$0\\atop{D}$ background of 0.37 ± 0.28 events. The previous upper limit for this decay was 5.6 x 10<sup>-6sup> at the 90% confidence level.

  2. Methodology and levels of {sup 137} Cs, {sup 90} Sr and {sup 239} {sup +} {sup 240} Pu in marine sediments from the Brazilian Southern Coast

    Energy Technology Data Exchange (ETDEWEB)

    Figueira, R.C.L. [Universidade Cruzeiro do Sul - CETEC/UNICSUL - Sao Paulo/SP (Brazil); Tessler, M.G.; Mahiques, M.M. de [Instituto Oceanografico da Univesidade de Sao Paulo - IOUSP - Sao Paulo/SP (Brazil); Cunha, I.I.L. [Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP -Sao Paulo/SP (Brazil)]. e-mail: figueira@curiango.ipen.br

    2004-07-01

    Methodologies for analysis of {sup 137} Cs, {sup 90} Sr and {sup 239} {sup +} {sup 240} Pu were developed and applied to sediment samples collected along the Brazilian coast. This paper presents the instrumental steps for {sup 137} Cs analysis and the radiochemical steps necessary to analyse {sup 90} Sr and {sup 239} {sup +} {sup 240} Pu. The analytical quality control for radionuclide analysis was verified by participation in international intercomparison exercise running by IAEA as well as in reference material analysis. Further, methodologies were applied in sediments collected from 1976 to 1986 at the Brazilian southern coastal region. {sup 137}Cs levels ranged from 0.37 to 2.03 Bq kg{sup -1}, for {sup 90} Sr from MDC to 8.2 Bq kg{sup -1} and for {sup 239} {sup +} {sup 240} Pu from MDC to 227 m Bq kg{sup -1}. The minimum detectable concentration values (MDC) for {sup 90} Sr and {sup 239} {sup +} {sup 240} Pu were of 0.3 Bq kg{sup -1} and 4.2 mBq kg{sup -1}, respectively. The artificial radioactivity levels in Brazilian sediments are typical values due to fallout deposition and represent reference values for our country. (Author)

  3. Autoradiolytic decomposition and reductant-free sodium sup 124 I- and sup 123 I-iodide

    Energy Technology Data Exchange (ETDEWEB)

    Sajjad, M.; Lambrecht, R.M.; Bakr, S.A. (King Faisal Specialist Hospital and Research Centre, Riyadh (Saudi Arabia). Radionuclide and Cyclotron Operations)

    1990-01-01

    The presence of salts and metal cations in {sup 124}I- and {sup 123}I-sodium iodide solutions separated from {sup 124}Te targets promots autoradiolytic decomposition of iodide to several different iodine species dependent upon the chemical environment. The stabilization of the radioiodine as iodide by removal of trace salts and trace metal cations and in the absence of reducing agents is described. The high specific activity {sup 123}I- and {sup 124}I-iodide is suitable for labeling antibodies, proteins and radiopharmaceuticals. (orig.).

  4. Search for B{sup +} --> K{sup +} lepton-plus-lepton-minus and B{sup 0} --> K*{sup 0} lepton-plus-lepton-minus

    Energy Technology Data Exchange (ETDEWEB)

    Barrera, Barbara

    2000-08-28

    Using a sample of 3.7 x 10{sup 6} upsilon(4S) --> B anti-B events collected with the BaBar detector at the PEP-II storage ring, the authors search for the electroweak penguin decays B{sup +} --> K{sup +}e{sup +}e{sup {minus}}, B{sup +} --> K{sup +}mu{sup +}mu{sup {minus}},B{sup 0} --> K*{sup 0} e{sup +}e{sup {minus}}, and B{sup 0} --> K*{sup 0}mu{sup +}mu{sup {minus}}. The authors observe no significant signals for these modes and set preliminary 90% C.L. upper limits of: beta(B{sup +} --> K{sup +}e{sup +}e{sup {minus}}) < 12.5 x 10{sup {minus}6}; beta(B{sup +} --> K{sup +}mu{sup +}mu{sup {minus}}) < 8.3 x 10{sup {minus}6}; beta(B{sup 0} --> K*{sup 0}e{sup +}e{sup {minus}}) < 24.1 x 10{sup {minus}6}; and beta(B{sup 0} --> K*{sup 0}mu{sup +}mu{sup {minus}}) < 24.5 x 10{sup {minus}6}.

  5. Differential branching fraction and angular moments analysis of the decay B{sup 0}→K{sup +}π{sup −}μ{sup +}μ{sup −} in the K{sub 0,2}{sup ∗}(1430){sup 0} region

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Collaboration: The LHCb collaboration; and others

    2016-12-15

    Measurements of the differential branching fraction and angular moments of the decay B{sup 0} → K{sup +}π{sup −}μ{sup +}μ{sup −} in the K{sup +}π{sup −} invariant mass range 1330 < m(K{sup +}π{sup −}) < 1530  Me V /c{sup 2} are presented. Proton-proton collision data are used, corresponding to an integrated luminosity of 3 fb{sup −1} collected by the LHCb experiment. Differential branching fraction measurements are reported in five bins of the invariant mass squared of the dimuon system, q{sup 2}, between 0.1 and 8.0 Ge V{sup 2} /c{sup 4}. For the first time, an angular analysis sensitive to the S-, P- and D-wave contributions of this rare decay is performed. The set of 40 normalised angular moments describing the decay is presented for the q{sup 2} range 1.1–6.0 Ge V{sup 2} /c{sup 4}.

  6. How to measure parity violating effects in e/sup +/e/sup -/. -->. tau/sup +/tau/sup -/ annihilation experiments

    Energy Technology Data Exchange (ETDEWEB)

    Dahmen, H D; Schuelke, L; Zech, G [Physics Department, Siegen University, Germany, F.R.

    1979-02-26

    A measurement of parity violating effects in the process e/sup +/e/sup -/ ..-->.. tau/sup +/tau/sup -/ for unpolarized e/sup +/e/sup -/ beams is proposed. For realistic assumptions on the luminosity of PETRA and PEP an estimate shows that the experiment is feasible.

  7. Backward K*/sup 0/ production in the reaction pi /sup -/p to Lambda /sup 0/K/sup +/ pi /sup -/ at 9 and 12 GeV/c

    CERN Document Server

    Ferrer, A; Bouquet, B; D'Almagne, B; De Rosny, G; Nguyen, H; Petroff, P; Richard, F; Rivet, P; Roudeau, P; Rougé, A; Six, J; Treille, D; Volte, A; Yoshida, H

    1981-01-01

    The authors have analysed about 85000 fast Lambda /sup 0/ events, obtained in a fast proton triggered experiment performed at the CERN- Omega spectrometer at 9 and 12 GeV/c incident pi /sup -/ beam. Nearly 2500 Lambda /sup 0/K/sup +/ pi /sup -/ events have been isolated. They find strong production of quasi-two-body processes Lambda /sup 0/K* /sup 0/ and Sigma */sup -/K/sup +/ consistent with u-channel hyperon exchange. Results on Lambda /sup 0/ polarization, K*/sup 0/ decay parameters and differential cross sections are given for Lambda /sup 0 /K*/sup 0/(892) and Lambda /sup 0/K*/sup 0/(1430) final states. A comparison is made with the associated backward Lambda /sup 0/(1520)K* /sup 0/ production seen in the four-prong reaction pi /sup -/p to pK /sup -/K/sup +/ pi /sup -/ obtained in the same experiment. (13 refs).

  8. Measurement of the D{sup {+-}} production asymmetry in 7 TeV pp collisions

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adametz, A. [Physikalisches Institut, Ruprecht-Karls-Universitaet Heidelberg, Heidelberg (Germany); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); and others

    2013-01-08

    The asymmetry in the production cross-section {sigma} of D{sup {+-}} mesons, A{sub P}=({sigma}(D{sup +})-{sigma}(D{sup -}))/({sigma}(D{sup +})+{sigma}(D{sup -})) , is measured in bins of pseudorapidity {eta} and transverse momentum p{sub T} within the acceptance of the LHCb detector. The result is obtained with a sample of D{sup +}{yields}K{sub S}{sup 0}{pi}{sup +} decays corresponding to an integrated luminosity of 1.0 fb{sup -1}, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0sup +}{yields}K{sub S}{sup 0}{pi}{sup +} decay is negligible. No significant dependence on {eta} or p{sub T} is observed.

  9. Coincident measurement between neutron and fragment in reaction sup 1 sup 7 N + sup 1 sup 9 sup 7 Au

    CERN Document Server

    Li Xiang Qing; Jiang Dong Xing; Ye Yan Lin; Chen Tao; Li Zhi Huan; Ge Yuch Eng; Wang Quan Jin; Wu He Yu; Jin Ge; Duan Li Min; Xiao Zhi Gang; Wang Hong Wei; Li Zu Yu; Wang Su Fang

    2002-01-01

    In the reaction induced by 33.4 MeV/u sup 1 sup 7 N beam on sup 1 sup 9 sup 7 Au, the coincident measurement between neutron and fragment was performed with the different combinations of 16 neutron detectors at 4 degree-83 degree and 14 telescopes at 2.3 degree - 9.0 degree. Integrating the measured angular distributions of the different isotopes, the isotopic yield distributions of Z = 3-6 elements are obtained. Based on the Abrasion-ablation model, isotopic yield distributions are calculated using different density distributions for the projectile sup 1 sup 7 N and compared with the experiment data

  10. Angular correlation measurements for {sup 12}C{sup 12}C,{sup 12}C{sup 12}C 3{sup -} scattering

    Energy Technology Data Exchange (ETDEWEB)

    Wuosmaa, A.H.; Betts, R.R.; Freer, M.

    1995-08-01

    Previous studies of inelastic {sup 12}C + {sup 12}C scattering to a variety of final states identified significant resonance behavior in a number of different reaction channels. These resonances can be interpreted as either potential scattering resonances, or as population of cluster structures in the compound nucleus {sup 24}Mg, or as some interplay between the two mechanisms. Currently, for many of these resonances the situation remains unclear. One example is a large peak observed in the excitation function for the 3{sup -} - g.s. excitation, identified in previous work performed at the Daresbury Laboratory in England. This peak is observed at the same center-of-mass energy as one observed in the O{sub 2}{sup +}-O{sub 2}{sup +} inelastic scattering channel. That structure was suggested to correspond to exotic deformed configurations in the compound nucleus {sup 24}Mg. As the peak in the 3{sup -} + g.s. exit channel occurs at precisely the same energy as the purported resonance, it is tempting to associate the two. Before such an association can be confirmed or ruled out, further information must be obtained about the 3{sup -} + g.s. structure. In particular, it is important to determine the angular momenta that dominate the 3{sup -} + g.s. structure.

  11. New neutral current effects at e sup + e sup - linear colliders

    CERN Document Server

    Pankov, A A

    2002-01-01

    Four fermion contact interaction effects in the processes e sup + e sup - -> mu sup +mu sup - , b-barb and c-barc at the e sup + e sup - linear colliders with sq root s = 0.5 TeV and longitudinally polarized initial beams have been studied. Presented analysis has been performed by means of new integrated observables expressed in terms of the forward (sigma sub F) and backward (sigma sub B) polarized cross sections such that they give information on individual helicity cross sections. The helicity cross sections allow to perform a general model-independent analysis of four-fermion contact interactions and obtain the corresponding constraints on their parameters. It is also shows that the sensitivity of the new polarized observables to contact interactions is quite larger than that of the conventional observables (sigma, A sub F sub B , A sub L sub R , A sub L sub R sub , sub F sub B)

  12. On the chemical resolution of the {sup 87}Rb{sup +} (s{sup 0})/{sup 87}Sr{sup +} (s{sup 1}) isobaric interference: A kinetic search for an optimum reagent

    Energy Technology Data Exchange (ETDEWEB)

    Cheng Ping; Koyanagi, Gregory K. [Department of Chemistry, Centre for Research in Mass Spectrometry and Centre for Research in Earth and Space Science, York University, Toronto, Ontario, M3J 1P3 (Canada); Bohme, Diethard K. [Department of Chemistry, Centre for Research in Mass Spectrometry and Centre for Research in Earth and Space Science, York University, Toronto, Ontario, M3J 1P3 (Canada)], E-mail: dkbohme@yorku.ca

    2008-10-03

    Room-temperature reactions of the atomic cations Sr{sup +} and Rb{sup +} have been surveyed systematically with a variety of gases using an Inductively-Coupled Plasma/Selected-Ion Flow Tube (ICP/SIFT) tandem mass spectrometer. Rate coefficients and product distributions have been measured in He buffer gas at 0.35 Torr and 295 K for reactions of Sr{sup +} and Rb{sup +} with CH{sub 3}F, CH{sub 3}Cl, N{sub 2}O, CO{sub 2}, CS{sub 2}, SF{sub 6}, D{sub 2}O and NH{sub 3}. Rb{sup +} (s{sup 0}) is seen to be quite inert with these molecules and reacts either slowly by molecule addition or not at all, while Sr{sup +} (s{sup 1}) is much more reactive with all these 8 molecules, especially with CH{sub 3}F, CH{sub 3}Cl, N{sub 2}O and SF{sub 6}. Sr{sup +} reacts with CH{sub 3}F and SF{sub 6} by F-atom transfer, with CH{sub 3}Cl by Cl-atom transfer and with N{sub 2}O by O-atom transfer, and the reaction rate coefficients are all quite high, k {>=} 1.4 x 10{sup -11} cm{sup 3} molecules{sup -1} s{sup -1}. The extreme differences in reactivity with CH{sub 3}F, SF{sub 6}, CH{sub 3}Cl and N{sub 2}O provide a chemical basis for the separation of isobaric interferences of {sup 87}Rb{sup +} and {sup 87}Sr{sup +} often encountered in ICP-MS. Among these four molecules, SF{sub 6} exhibits the largest difference in reactivity, almost a factor of 10{sup 4}, and so is identified as the kinetically recommended reagent for the chemical resolution of the isobaric interference of {sup 87}Rb{sup +} and {sup 87}Sr{sup +}.

  13. Investigation of Spectroscopic Properties and Spin-Orbit Splitting in the X<sup>2sup>Π and A<sup>2sup>Π Electronic States of the SO<sup>+> Cation

    Directory of Open Access Journals (Sweden)

    Zunlue Zhu

    2012-07-01

    Full Text Available The potential energy curves (PECs of the X<sup>2sup>Π and A<sup>2sup>Π electronic states of the SO<sup>+> ion are calculated using the complete active space self-consistent field method, which is followed by the internally contracted multireference configuration interaction (MRCI approach for internuclear separations from 0.08 to 1.06 nm. The spin-orbit coupling effect on the spectroscopic parameters is included using the Breit-Pauli operator. To improve the quality of PECs and spin-orbit coupling constant (A0, core-valence correlation and scalar relativistic corrections are included. To obtain more reliable results, the PECs obtained by the MRCI calculations are corrected for size-extensivity errors by means of the Davidson modification (MRCI+Q. At the MRCI+Q/aug-cc-pV5Z+CV+DK level, the A0 values of the SO<sup>+(X>2sup1/2, 3/2 and SO<sup>+(A>2sup1/2, 3/2 are 362.13 and 58.16 cm<sup>−1sup> when the aug-cc-pCVTZ basis set is used to calculate the spin-orbit coupling splitting, and the A0 of the SO<sup>+(X>2sup1/2, 3/2 and SO<sup>+(A>2sup1/2, 3/2 are 344.36 and 52.90 cm<sup>−1sup> when the aug-cc-pVTZ basis set is used to calculate the spin-orbit coupling splitting. The conclusion is drawn that the core-valence correlations correction makes the A0 slightly larger. The spectroscopic results are obtained and compared with those reported in the literature. Excellent agreement exists between the present results and the measurements. The vibrational manifolds are calculated, and those of the first 30 vibrational states are reported for the J = 0 case. Comparison with the measurements shows that the present vibrational manifolds are both reliable and accurate.

  14. Possible D{sup (*)} anti D{sup (*)} and B{sup (*)} anti B{sup (*)} molecular states in the extended constituent quark models

    Energy Technology Data Exchange (ETDEWEB)

    Yang, You-Chang [Nanjing University, Department of Physics, Nanjing (China); Zunyi Normal University, School of Physics and Electronic Science, Zunyi (China); Institute of Theoretical Physics, CAS, State Key Laboratory of Theoretical Physics, Beijing (China); Tan, Zhi-Yun [Zunyi Normal University, School of Physics and Electronic Science, Zunyi (China); Ping, Jialun [Nanjing Normal University, Department of Physics, Nanjing (China); Zong, Hong-Shi [Nanjing University, Department of Physics, Nanjing (China); Institute of Theoretical Physics, CAS, State Key Laboratory of Theoretical Physics, Beijing (China)

    2017-09-15

    The possible neutral D{sup (*)} anti D{sup (*)} and B{sup (*)} anti B{sup (*)} molecular states are studied in the framework of the constituent quark models, which is extended by including the s-channel one-gluon exchange. Using different types of quark-quark potentials, we solve the four-body Schroedinger equation by means of the Gaussian expansion method. The bound states of D{sup (*)} anti D{sup (*)} with J{sup PC} = 1{sup ++}, 2{sup ++} and B{sup (*)} anti B{sup (*)} with J{sup PC} = 0{sup ++}, 1{sup +-}, 1{sup ++}, 2{sup ++} are obtained. The molecular states D* anti D with J{sup PC} = 1{sup ++} and B* anti B with J{sup PC} = 1{sup +-} are good candidates for X(3872) and Z{sup 0}{sub b}(10610), respectively. The dependence of the results on the model parameters is also discussed. (orig.)

  15. Study of K. pi. scattering using the reactions K/sup + -/p. -->. K/sup + -/. pi. /sup +/n and K/sup + -/p. -->. K/sup + -/. pi. /sup -/. delta. /sup + +/ at 13 GeV/c

    Energy Technology Data Exchange (ETDEWEB)

    Estabrooks, P [McGill Univ., Montreal, Quebec (Canada); Carnegie, R K [Carleton Univ., Ottawa, Ontario (Canada); Martin, A D [Durham Univ. (UK); Dunwoodie, W M; Lasinski, T A; Leith, D W.G.S. [Stanford Linear Accelerator Center, Calif. (USA)

    1978-02-27

    An elastic K..pi.. partial-wave analysis is presented. It is based on high-statistics data for the reactions K/sup + -/p ..-->.. K/sup + -/..pi../sup +/n and K/sup + -/p ..-->.. K/sup + -/..pi../sup -/..delta../sup + +/ at 13 GeV obtained in a spectrometer experiment performed at SLAC. For each reaction, a t-dependent parametrization of the production amplitudes provides information on both the K..pi.. mass dependence of the production mechanisms and on K..pi.. scattering. Knowledge of the t-dependence then allows a calculation of the K..pi.. partial-wave amplitudes for K..pi.. masses from 0.7 to 1.9 GeV. The results of such analyses using data for (i) the neutral recoil reactions, (ii) the ..delta../sup + +/ recoil reactions, and (iii) both neutron and ..delta../sup + +/ recoil reactions simultaneously are presented.

  16. Hadron production in e<sup>+e-> annihilation at BABAR, and implication for the muon anomalous magnetic moment

    Energy Technology Data Exchange (ETDEWEB)

    Porter, Frank C. [Caltech, Pasadena, CA (United States). Physics Dept.

    2015-04-29

    The BABAR collaboration has an extensive program of studying hadronic cross sections in low-energy e<sup>+e-> collisions, accessible via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for illuminating the current 3.6 sigma difference between the predicted and the experimental values. We have published results on a number of processes with two to six hadrons in the final state. We report here the results of recent studies with final states that constitute the main contribution to the hadronic cross section in the energy region between 1 and 3 GeV, as e<sup>+e-> → K<sup>+K->, π<sup>+π->, and e<sup>+e-> → 4 hadrons

  17. Determination of the asymptotic normalization coefficients for <sup>14sup>C + n <--> <sup>15sup>C, the <sup>14sup>C(n, gamma)<sup>15sup>C reaction rate, and evaluation of a new method to determine spectroscopic factors

    Energy Technology Data Exchange (ETDEWEB)

    McCleskey, M; Mukhamedzhanov, A M; Trache, L; Tribble, R E; Banu, A; Eremenko, V; Goldberg, V Z; Lui, Y W; McCleskey, E; Roeder, B T; Spiridon, A; Carstoiu, F; Burjan, V; Hons, Z; Thompson, I J

    2014-04-17

    The <sup>14sup>C + n <--> <sup>15sup>C system has been used as a test case in the evaluation of a new method to determine spectroscopic factors that uses the asymptotic normalization coefficient (ANC). The method proved to be unsuccessful for this case. As part of this experimental program, the ANCs for the <sup>15sup>C ground state and first excited state were determined using a heavy-ion neutron transfer reaction as well as the inverse kinematics (d,p) reaction, measured at the Texas A&M Cyclotron Institute. The ANCs were used to evaluate the astrophysical direct neutron capture rate on <sup>14sup>C, which was then compared with the most recent direct measurement and found to be in good agreement. A study of the <sup>15sup>C SF via its mirror nucleus <sup>15sup>F and a new insight into deuteron stripping theory are also presented.

  18. Design and construction of the equipment and obtention process of TeO{sub 2} for the {sup 131} I production; Diseno y construccion del equipo y proceso de obtencion de TeO{sub 2} para la produccion de {sup 131} I

    Energy Technology Data Exchange (ETDEWEB)

    Alanis M, J. [ININ, Departamento de Materiales Radiactivos, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2000-09-15

    This project was carried out in the National Institute of Nuclear Research, Nuclear Center of Mexico (ININ), with the name 'A New Method to Obtain {sup 131}I by Neutron Irradiation of TeO{sub 2} and it Dry Distillation'. This work establishes the optimal parameters to produce {sup 131}I by neutron irradiation and foundry of TeO{sub 2} sinterized. The TeO{sub 2} of high purity was produced adding HNO{sub 3} to the metallic tellurium (Merck 8100) and heating several samples to different temperatures until dryness in presence of an air current. The optimal conditions of temperature and reaction velocity were obtained, as well as of drying and sintering, to obtain TeO{sub 2} crystals with high purity able to retain the {sup 131}I produced by the radioactive decay. After drying and purified by the heating, the TeO{sub 2} was sinterized, applying a next temperature to it melting point by few minutes, enough to create cavities in the middle of it crystalline structure, where the {sup 131}I in gas form produced by the decay of the {sup 131}Te it is retained, one time that the TeO{sub 2} is bombarded with thermal neutrons in the nuclear reactor. Then, the reactions {sup 130}Te(n, {gamma}){sup 131}Te{sup m} (t{sub 1/2} = 30 h) and {sup 130}Te(n, {gamma}){sup 131}Te (t{sub 1/2} = 24.8 m) with an optimal irradiation time of 2.5 h. (Author)

  19. Level Densities and Radiative Strength Functions in <sup>56sup>FE and <sup>57sup>FE

    Energy Technology Data Exchange (ETDEWEB)

    Tavukcu, Emel [North Carolina State Univ., Raleigh, NC (United States)

    2002-12-10

    Understanding nuclear level densities and radiative strength functions is important for pure and applied nuclear physics. Recently, the Oslo Cyclotron Group has developed an experimental method to extract level densities and radiative strength functions simultaneously from the primary γ rays after a light-ion reaction. A primary γ-ray spectrum represents the γ-decay probability distribution. The Oslo method is based on the Axel-Brink hypothesis, according to which the primary γ-ray spectrum is proportional to the product of the level density at the final energy and the radiative strength function. The level density and the radiative strength function are fit to the experimental primary γ-ray spectra, and then normalized to known data. The method works well for heavy nuclei. The present measurements extend the Oslo method to the lighter mass nuclei <sup>56sup>Fe and <sup>57sup>Fe. The experimental level densities in <sup>56sup>Fe and <sup>57sup>Fe reveal step structure. This step structure is a signature for nucleon pair breaking. The predicted pairing gap parameter is in good agreement with the step corresponding to the first pair breaking. Thermodynamic quantities for <sup>56sup>Fe and <sup>57sup>Fe are derived within the microcanonical and canonical ensembles using the experimental level densities. Energy-temperature relations are considered using caloric curves and probability density functions. The differences between the thermodynamics of small and large systems are emphasized. The experimental heat capacities are compared with the recent theoretical calculations obtained in the Shell Model Monte Carlo method. Radiative strength functions in <sup>56sup>Fe and <sup>57sup>Fe have surprisingly high values at low γ-ray energies. This behavior has not been observed for heavy nuclei, but has been observed in other light- and medium-mass nuclei. The origin of this low γ-ray energy effect remains unknown.

  20. Observation of the suppressed decay Λ{sub b}{sup 0}→pπ{sup −}μ{sup +}μ{sup −}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Collaboration: LHCb Collaboration; and others

    2017-04-06

    The suppressed decay Λ{sub b}{sup 0}→pπ{sup −}μ{sup +}μ{sup −}, excluding the J/ψ and ψ(2S)→μ{sup +}μ{sup −} resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb{sup −1} collected with the LHCb experiment. The Λ{sub b}{sup 0}→pπ{sup −}μ{sup +}μ{sup −} branching fraction is measured relative to the Λ{sub b}{sup 0}→J/ψ(→μ{sup +}μ{sup −})pπ{sup −} branching fraction giving ((B(Λ{sub b}{sup 0}→pπ{sup −}μ{sup +}μ{sup −}))/(B(Λ{sub b}{sup 0}→J/ψ(→μ{sup +}μ{sup −})pπ{sup −})))=0.044±0.012±0.007, where the first uncertainty is statistical and the second is systematic. This is the first observation of a b→d transition in a baryonic decay.

  1. Quality control studies of {sup 99}Mo used in {sup 99}Mo/{sup 99m}Tc generators produced at IPEN/CNEN-SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Said, Daphne S.; Brambilla, Tania P.; Matsuda, Margareth M.N.; Osso Junior, Joao A., E-mail: daphnesaid@usp.br, E-mail: taniabrambilla@yahoo.com.br, E-mail: mmatsuda@ipen.br, E-mail: jaosso@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    {sup 99m}Tc is the most used radionuclide in nuclear medicine. In Brazil, the {sup 99}Mo/{sup 99m}Tc generators are produced exclusively by the Center of Radiopharmacy at IPEN-CNEN/SP, by importing {sup 99}Mo from different suppliers. {sup 99}Mo (t{sub 1/2} = 66 h) is a fission product of {sup 235}U, therefore, it can be accompanied by several radioisotopes that are highly prejudicial for human health, demanding a strict quality control of this product for generators safe use. The European Pharmacopoeia established some parameters and limits that evaluate the quality of the solution of sodium [{sup 99}Mo]molybdate, that is used as raw material for generator's production. The European Pharmacopoeia also recommends some analytical methods to perform these evaluations, however, it has been observed difficulties on the implementation of these methods by the generator's producers. These difficulties are probably related to the lack of practicability of the proposed methods and the extensive list of utilized reagents. In this work some procedures of the European Pharmacopoeia's quality control method for {sup 99}Mo were evaluated. Different types of solid phase exchanger cartridges were tested for retention of {sup 99}Mo in 3 different conditions. Cartridges that presented percentages of retention higher than 90% were also tested for separation of {sup 99}Mo from possible contaminants (Ru e Te). The results shown that solid phase exchanger cartridges that presented percentages of retention of Mo higher than 90% also presented significant percentages of retention of Ru and Te. An alternative method for separation of {sup 99}Mo from {sup 131}I (other contaminant) are also proposed. (author)

  2. First observation of the decay $\\bar{B}$$0\\atop{s}$ → D$±\\atop{s}$ K<sup>∓> and measurement of the relative branching fraction B($\\bar{B}$$0\\atop{s}$→ D$±\\atop{s}$ K<sup>∓>)/B($\\bar{B}$$0\\atop{s}$→ D$+\\atop{s}$ π<sup>->).

    Energy Technology Data Exchange (ETDEWEB)

    Muelmenstaedt, Johannes [Univ. of California, Berkeley, CA (United States)

    2007-01-01

    We present the first observation of the decay $\\bar{B}$$0\\atop{s}$→ D$±\\atop{s}$ K∓ and measure the relative branching fraction of $\\bar{B}$$0\\atop{s}$ → D$±\\atop{s}$ K∓ to $\\bar{B}$$0\\atop{s}$ → D$+\\atop{s}$ π<sup>->. The measurement of the relative branching fraction is performed by applying a fit in invariant mass and specific ionization to 1.2 fb<sup>-1sup> of Ds(φπ)X data collected with the CDF II detector in pp collisions at √ s = 1.96 TeV at the Fermilab Tevatron collider. We measure B $\\bar{B}$$0\\atop{s}$ → D$±\\atop{s}$ K∓ /B $\\bar{B}$$0\\atop{s}$ → D$+\\atop{s}$ π<sup>-> = 0.107±0.019(stat)±0.008(sys). The statistical significance of the $\\bar{B}$$0\\atop{s}$ → D$±\\atop{s}$ K<sup>∓> signal is 7.9σ. To cross-check our analysis method, we also measure B $\\bar{B0}$→ D<sup>+K-> /B $\\bar{B0}$ → D<sup>+π-> and B $\\bar{B0}$ → D<sup>+*K-> /B $\\bar{B0}$ → D<sup>*+π-> and verify that our results are in agreement with the world average.

  3. Observation of the decay B{sub s}{sup 0}→D{sup ¯0}ϕ

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2013-12-18

    First observation of the decay B{sub s}{sup 0}→D{sup ¯0}ϕ is reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb{sup −1}, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. The significance of the signal is 6.5 standard deviations. The branching fraction is measured relative to that of the decay B{sub s}{sup 0}→D{sup ¯0}K{sup ¯⁎0} to be (B(B{sub s}{sup 0}→D{sup ¯0}ϕ))/(B(B{sub s}{sup 0}→D{sup ¯0}K{sup ¯⁎0})) =0.069±0.013 (stat)±0.007 (syst). The first measurement of the ratio of branching fractions for the decays B{sub s}{sup 0}→D{sup ¯0}K{sup ¯⁎0} and B{sup 0}→D{sup ¯0}K{sup ⁎0} is found to be (B(B{sub s}{sup 0}→D{sup ¯0}K{sup ¯⁎0}))/(B(B{sup 0}→D{sup ¯0}K{sup ⁎0})) =7.8±0.7 (stat)±0.3 (syst)±0.6 (f{sub s}/f{sub d}), where the last uncertainty is due to the ratio of the B{sub s}{sup 0} and B{sup 0} fragmentation fractions.

  4. Channel separation using the transversity parameter in the pi /sup +/n to p pi /sup +/ pi /sup -/ reaction at 9 GeV/c

    CERN Document Server

    Armenise, N

    1978-01-01

    To solve the problem of separating competitive channels in a multiparticle final state the use of a parameter, called A(*), measuring the 'event transversity' has been suggested. The A parameter is found to be as powerful as prism plot analysis in separating different channels and economic with respect to the computer time. The transversity method is applied to the three-body reaction p/sup +/n to p pi /sup +/ pi /sup -/ at 9 TeV/c selected in pi /sup +/d interactions obtained in 2m-DBC exposed at CERN-PS. The main contributions in the final state are rho /sup 0/, f, g/sup 0/ (a dipion mass resonance) resonance production and neutron diffraction dissociation. (5 refs).

  5. Radiative decay of the eta-, eta'-mesons in the nonlocal quark model. [eta(eta'). --> gamma gamma. ; eta. -->. pi. /sup +/. pi. /sup -/. gamma. ; eta. -->. pi. /sup 0/2. gamma. ; eta'. -->. rho/sup 0/. gamma. ; eta'. -->. omega gamma. ;. pi. /sup 0/. -->. gamma. e/sup +/e/sup -/; eta(eta'). -->. gamma mu. /sup +/. mu. /sup -/

    Energy Technology Data Exchange (ETDEWEB)

    Efimov, G V; Ivanov, M A; Nogovitsyn, E A [Joint Inst. for Nuclear Research, Dubna (USSR)

    1981-07-01

    P..--> gamma gamma.. (P=..pi../sup 0/, eta, eta'), eta..--> pi../sup +/..pi../sup -/..gamma.., eta..--> pi../sup 0/..gamma gamma.., eta/sup 1/..-->..V..gamma.. (V=rho/sup 0/, ..omega..), p..--> gamma..l/sup +/l/sup -/ (p=..pi../sup 0/, eta, eta') radiation decays are studied for testing the applicability of the non-local quark model for description of the experimental data. The Feynman diagrams of these decays are presented, values of the widths of the Veta..--> gamma gamma.., eta..--> pi../sup +/..pi../sup -/..gamma.., eta..--> pi../sup 0/..gamma gamma.., eta'..--> gamma gamma.., eta'..-->..rho/sup 0/..gamma.., eta'..--> omega gamma.. decays are calculated and given in the form of a table. Calculations are carried out for two values of the eta eta'-crossing angle: THETA=-11 deg and -18 deg. Values of invariant amplitudes of these decays are determined for ..pi../sup 0/..--> gamma..e/sup +/e/sup -/, eta..--> gamma mu../sup +/..mu../sup -/, eta'..--> gamma mu../sup +/..mu../sup -/ decays at THETA=-11 deg and -18 deg. The best agreement with the experimental data is noted to take place at THETA=-11 deg, the determined width of the eta..--> pi../sup 0/..gamma gamma.. decays is underestimated as compared with the experimental one.

  6. Isotopic distributions of the sup 1 sup 8 N fragmentation products in coincidence with neutrons on targets sup 1 sup 9 sup 7 Au and sup 9 Be

    CERN Document Server

    Li Xiang Qing; Ye Yan Lin; Hua Hui; Chen Tao; Li Zhi Huan; Ge Yuch Eng; Wang Quan Jin; Wu He Yu; Jin Ge; Duan Li Min; Xiao Zhi Gang; Wang Hong Wei; Li Zhu Yu; Wang Su Fang

    2002-01-01

    The authors present the experimental isotopic distributions of the sup 1 sup 8 N projectile fragmentation products Li, Be, B and C in coincidence with neutrons, as well as the inclusive ones on sup 1 sup 9 sup 7 Au and sup 9 Be targets. In the framework of the abrasion-ablation model, these distributions are calculated for various nucleon density distributions of the projectile. The comparison with experimental isotopic distributions of the projectile-like fragments in coincidence with neutrons shows that the information on the nucleon density distribution of the sup 1 sup 8 N projectile can be extracted

  7. Low-energy resonances in sup 25 Mg(p,. gamma. ) sup 26 Al, sup 26 Mg(p,. gamma. ) sup 27 Al and sup 27 Al(p,. gamma. ) sup 28 Si

    Energy Technology Data Exchange (ETDEWEB)

    Iliadis, C; Schange, T; Rolfs, C; Schroeder, U; Somorjai, E; Trautvetter, H P; Wolke, K [Muenster Univ. (Germany, F.R.). Inst. fuer Kernphysik; Endt, P M; Kikstra, S W [Rijksuniversiteit Utrecht (Netherlands). Robert van de Graaff Lab.; Champagne, A E [Princeton Univ., NJ (USA). Dept. of Physics; Arnould, M; Paulus, G [Universite Libre de Bruxelles (Belgium). Inst. d' Astronomie et d' Astrophysique

    1990-06-11

    Gamma-ray decay schemes have been measured with bare and Compton-suppressed Ge detectors at low-energy resonances (E{sub p}<340 keV) in the (p, {gamma}) reactions on {sup 25}Mg, {sup 26}Mg and {sup 27}Al. Althogether 58 new decay branches have been observed and a new {sup 26}Mg(p, {gamma}){sup 27}Al resonance has been found at E{sub p}=154.5{plus minus}1.0 keV. The new branchings lead to J{sup {pi}}; T determinations (or limitations) for two states in {sup 26}Al and four states in {sup 28}Si. The absolute strengths of the {sup 25}Mg(p, {gamma}){sup 26}Al and {sup 26}Mg(p, {gamma}){sup 27}Al resonances have also been obtained, and the uncertainties of the stellar rates, deduced from the available data for both reactions, are significantly reduced. Some astrophysical consequences are discussed. (orig.).

  8. Observation of the rare {eta}{yields}e{sup +}e{sup -}e{sup +}e{sup -} decay with the KLOE experiment

    Energy Technology Data Exchange (ETDEWEB)

    Ambrosino, F. [Dipartimento di Scienze Fisiche dell' Universita ' Federico II' , Napoli (Italy); INFN Sezione di Napoli, Napoli (Italy); Antonelli, A.; Antonelli, M. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Archilli, F. [Dipartimento di Fisica dell' Universita ' Tor Vergata, Roma (Italy); INFN Sezione di Roma Tor Vergata, Roma (Italy); Balwierz, I. [Institute of Physics, Jagiellonian University, Krakow (Poland); Bencivenni, G. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Bini, C. [Dipartimento di Fisica dell' Universita ' Sapienza' , Roma (Italy); INFN Sezione di Roma, Roma (Italy); Bloise, C. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Bocchetta, S. [Dipartimento di Fisica dell' Universita ' Roma Tre' , Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Bossi, F. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Branchini, P. [INFN Sezione di Roma Tre, Roma (Italy); Capon, G.; Capussela, T. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Ceradini, F. [Dipartimento di Fisica dell' Universita ' Roma Tre' , Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Ciambrone, P.; Czerwinski, E.; De Lucia, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Santis, A. [Dipartimento di Fisica dell' Universita ' Sapienza' , Roma (Italy); INFN Sezione di Roma, Roma (Italy); De Simone, P. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Zorzi, G. [Dipartimento di Fisica dell' Universita ' Sapienza' , Roma (Italy); INFN Sezione di Roma, Roma (Italy)

    2011-08-26

    We report the first observation of the rare {eta}{yields}e{sup +}e{sup -}e{sup +}e{sup -}({gamma}) decay based on 1.7 fb{sup -1} collected by the KLOE experiment at the DA{Phi}NE {phi}-factory. The selection of the e{sup +}e{sup -}e{sup +}e{sup -} final state is fully inclusive of radiation. We have identified 362{+-}29 events resulting in a branching ratio of (2.4{+-}0.2{sub stat}+bckg{+-}0.1{sub syst})x10{sup -5}.

  9. Photon and Neutral π<sup>0sup production in <sup>197sup>Au + <sup>197sup>Au collisions at √sNN = 130 GeV

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, Ian Jeffrey [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2002-09-01

    Inclusive transverse momentum spectra of photons and π<sup>0sup>s at mid-rapidity are studied as a function of collision centrality for <sup>197sup>Au+ <sup>197sup>Au collisions at √sNN = 130 GeV. Photon pair conversions have been reconstructed from charged tracks measured by the main Time Project Chamber of the STAR experiment at the RHIC heavy ion facility. The transverse momentum resolution of photons with this method is estimated to be Δpt/pt = 2% at 0.125 GeV/c and 5% at 2.5 GeV/c. Photon spectra were measured up to a transverse momentum of 2.4 GeV/c between ± 0.5 units of rapidity. The dominant photon production mechanism, the π<sup>0sup> → γγ decay, was measured between 0.25-2.5 GeV/c and ± 1 units of rapidity. Spectra are reported for the top 11%, 11-34% and 34-85% centrality classes. It was observed that in mid-central and central collisions the relative contribution of the π<sup>0sup> → γγ decay to the inclusive photon spectrum decreases above a transverse momentum of 1.65 GeV/c. In central collisions the magnitude of the decrease from pt = 1.65 GeV/c to 2.4 GeV/c is 20%. It is unlikely that contributions from other π<sup>0sup> decay channels and other particle decays fully explain this decrease. The centrality dependence on the shapes of the π<sup>0sup> spectra was analyzed with Boltmann and Bose-Einstein functions. In the transverse momentum windows of the spectra, the extracted temperatures are near 0.295 GeV. These temperatures are substantially higher than those extracted from π<sup>±> spectra in a lower range of transverse momentum. This is an indication that the shapes of the pion spectra deviate from purely exponential shapes.

  10. Quantum efficiency of Yb{sup 3+}–ZnTe co-doped phosphate glass system

    Energy Technology Data Exchange (ETDEWEB)

    Falci, R.F.; Freitas, A.M.; Silva, G.H. [Laboratório de Espectroscopia de Materiais, Departamento de Física, ICE, Universidade Federal de Juiz de Fora, 36036-330, Juiz de Fora, MG (Brazil); Pinheiro, A.S. [Centro Federal de EducaçãoTecnológica Celso Suckow da Fonseca (CEFET/RJ) - Campus Petrópolis, CEP 25620-003, Petrópolis - RJ (Brazil); Dantas, N.O. [Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS), Instituto de Física da Universidade Federal de Uberlândia, CP 593, CEP 38400-902, Uberlândia, MG (Brazil); Anjos, V., E-mail: virgilio@fisica.ufjf.br [Laboratório de Espectroscopia de Materiais, Departamento de Física, ICE, Universidade Federal de Juiz de Fora, 36036-330, Juiz de Fora, MG (Brazil); Bell, M.J.V. [Laboratório de Espectroscopia de Materiais, Departamento de Física, ICE, Universidade Federal de Juiz de Fora, 36036-330, Juiz de Fora, MG (Brazil)

    2016-08-15

    The present paper deals with optical properties of a highly transparent phosphate glass co-doped with Yb{sup 3+} and ZnTe nanocrystals. The presence of ZnTe nanocrystals is due to a sequential melting–nucleation procedure evidenced by optical absorption and Atomic Force Microscopy. From the perspective of compositional variation of the dopants, photoluminescence and lifetime measurements were performed. As a result, it was demonstrated that the ZnTe nanocrystals increase the Yb{sup 3+} emission by a factor up to five, when the pumping wavelength is resonant with the ZnTe absorption. It was also verified that the ZnTe nanocrystals inhibit the self-trapping of the rare earth luminescence. As a consequence, the quantum efficiency of the {sup 5}F{sub 7/2}→{sup 5}F{sub 5/2} transitions of the Yb{sup 3+} is considerably increased. Finally, we have found that the glass thermal diffusivity is not sensitive to temperature variations comprising the interval from room temperature to cryogenic temperatures. This can be an important property when considering this material to future applications in high-power photonic devices.

  11. Temporal evolution of natural radionuclides distributions {sup 238}U, {sup 234}Th, {sup 226}Ra, {sup 228}Ra, {sup 210}Pb and {sup 210}Po in the Bransfield strait, Antarctica peninsula; Evolucao temporal das distribuicoes dos radionuclideos naturais {sup 238}U, {sup 234}Th, {sup 226}Ra, {sup 228}Ra, {sup 210}Pb and {sup 210}Po no estreito de Bransfiel, peninsula Antartica

    Energy Technology Data Exchange (ETDEWEB)

    Lapa, Flavia Valverde

    2013-07-01

    Research on the distribution of natural radionuclides in Antarctica is rare and thus, there is great interest in to know their occurrence and factors related to its mobilization, transference and accumulation in this extremely fragile environment. Natural radionuclides have been used intensively as tracers in the ocean, helping to better understand processes as sinking and particle resuspension, water masses mixture and oceanic circulation. {sup 234}Th (t½ = 24.1 days) is a particle-reactive radionuclide produced continuously in seawater by the decay of its soluble precursor conservative with salinity {sup 238}U (t½ = 4.5 10{sup 9} years). Since {sup 234}Th presents relatively short half-life, it is used to quantify processes that occur in temporal scale varying from days to weeks. The disequilibrium {sup 234}Th/{sup 238}U in the surface ocean has been applied to estimate carbon fluxes exported via sinking material. The flux of particles biologically productive out of the euphotic zone in the Southern Ocean has special attention due to its importance in the control of CO{sub 2} atmospheric concentrations. The radionuclides {sup 210}Pb (t½ = 22.3 years) and {sup 210}Po (t½ = 138 days) are also particle-reactive. The disequilibrium {sup 210}Po/{sup 210}Pb has been used to estimate fluxes of particles exported in the ocean in the time scale of weeks. The long-lived Ra isotopes, {sup 226}Ra (t½ = 1,600 years) and {sup 228}Ra (t½ = 5.75 years) are soluble in seawater, presenting unique properties that make them excellent tracers of water masses. This research work had the aim to study the distributions of natural radionuclides {sup 238}U, {sup 234}Th, {sup 22}'6Ra, {sup 22}'8Ra, {sup 210}Pb and {sup 210}Po in the Bransfield Strait during 2 samplings carried out in the 2011 Austral Summer (OPERANTAR XXIX and XXX). (author)

  12. B{sup 0} → K{sup *0}μ{sup +}μ{sup -} decay in the aligned two-Higgs-doublet model

    Energy Technology Data Exchange (ETDEWEB)

    Hu, Quan-Yi; Li, Xin-Qiang; Yang, Ya-Dong [Central China Normal University, Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE), Wuhan, Hubei (China)

    2017-03-15

    In the aligned two-Higgs-doublet model, we perform a complete one-loop computation of the short-distance Wilson coefficients C{sub 7,9,10}{sup (')}, which are the most relevant ones for b → sl{sup +}l{sup -} transitions. It is found that, when the model parameter vertical stroke σ{sub u} vertical stroke is much smaller than vertical stroke σ{sub d} vertical stroke, the charged scalar contributes mainly to chirality-flipped C{sub 9,10}{sup '}, with the corresponding effects being proportional to vertical stroke σ{sub d} vertical stroke {sup 2}. Numerically, the charged-scalar effects fit into two categories: (A) C{sub 7,9,10}{sup H{sup ±}} are sizable, but C{sub 9,10}{sup 'H{sup ±}} ≅ 0, corresponding to the (large vertical stroke σ{sub u} vertical stroke, small vertical stroke σ{sub d} vertical stroke) region; (B) C{sub 7}{sup H{sup ±}} and C{sub 9,10}{sup 'H{sup ±}} are sizable, but C{sub 9,10}{sup H{sup ±}} ≅ 0, corresponding to the (small vertical stroke σ{sub u} vertical stroke, large vertical stroke σ{sub d} vertical stroke) region. Taking into account phenomenological constraints from the inclusive radiative decay B → X{sub s}γ, as well as the latest model-independent global analysis of b → sl{sup +}l{sup -} data, we obtain the much restricted parameter space of the model. We then study the impact of the allowed model parameters on the angular observables P{sub 2} and P{sub 5}{sup '} of B{sup 0} → K{sup *0}μ{sup +}μ{sup -} decay, and we find that P{sub 5}{sup '} could be increased significantly to be consistent with the experimental data in case B. (orig.)

  13. Chemonuclear studies for identification for new production routes for the therapeutically useful radionuclides {sup 140}Nd, {sup 192}Ir, {sup 191}Pt, {sup 193m}Pt, und {sup 195m}Pt; Kernchemische Studien zur Entwicklung neuerer Produktionsverfahren fuer die therapierelevanten Radionuklide {sup 140}Nd, {sup 192}Ir, {sup 191}Pt, {sup 193m}Pt, und {sup 195m}Pt

    Energy Technology Data Exchange (ETDEWEB)

    Hilgers, K.

    2005-12-15

    New production routes for the therapeutically useful radionuclides {sup 140}Nd, {sup 192}Ir, {sup 191}Pt, {sup 193m}Pt and {sup 195m}Pt were investigated. Cross section data were measured using the stacked-foil technique and compared with theoretical calculations. A production method for the platinum nuclides was developed. The {sup 141}Pr(p, 2n){sup 140}Nd and {sup nat}Ce({sup 3}He, xn){sup 140}Nd reactions were investigated for production of {sup 140}Nd. Cross section data of nuclear reactions leading to the side products {sup 141}Nd, {sup 139}Nd and {sup 139}Ce could also be achieved. The experimental data were compared with theoretical calculations using the code ALICE-IPPE. A comparison of the calculated thick target yields showed that the {sup 141}Pr(p, 2n){sup 140}Nd reaction gives a higher yield. The {sup 192}Os(p, n){sup 192}Ir reaction was examined in the context of the production of {sup 192}Ir. Cross section data were determined and compared with theoretical calculations using the codes ALICE-IPPE and EMPIRE II. The yield of this reaction was compared with the yield of the reactor production of this nuclide. The reactor production seems to be more suitable because of a higher purity and yield. Cross section data were measured for the {sup 192}Os({alpha}, n){sup 195m}Pt, {sup 192}Os({alpha}, 3n){sup 193m}Pt and {sup 192}Os({sup 3}He, 4n){sup 191}Pt reactions. The activity of {sup 193m}Pt and {sup 195m}Pt was determined by X-ray spectroscopy after a chemical separation procedure. The ALICE-IPPE code was found to be inappropriate to reproduce the experimental values. The calculated yields were compared with the yields of other reactions, especially the reactor production of {sup 195m}Pt. The yield of the {sup 192}Os({alpha}, n){sup 195m}Pt reaction is lower compared to the yield of the reactor production, but offers lower target costs and higher specific activity. A production method for {sup 193m}Pt and {sup 195m}Pt was developed. Batch yields of 0.9 MBq

  14. Development of {sup 119}Sn nuclear resonance scattering of synchrotron radiation and first applications

    Energy Technology Data Exchange (ETDEWEB)

    Barla, A.

    2001-07-01

    In the framework of this thesis the NRS technique has been developed and applied, for the first time at the European Synchrotron Radiation Facility, at the resonance of {sup 119}Sn. Elastic nuclear forward scattering (NFS) is ideal for studies of hyperfine interactions, where information about the electronic and magnetic properties of solids is obtained. On the other hand nuclear inelastic scattering (NIS) allows one to study the phonon density of states (DOS) of Moessbauer isotopes in various kinds of systems. In the first stage, technical developments have been made, particularly with regards the used optical elements. A key point has been the construction of a high resolution monochromator (HRM) for the resonance of {sup 119}Sn, with an energy resolution of about 0.65 meV, perfectly suited to perform NIS experiments. A second HRM optimised in throughput has been constructed and used, in combination with focussing elements (bent crystals and compound refractive lenses), to perform NFS experiments at very high pressure. For the first applications of {sup 119}Sn NIS, the phonon DOS of {beta}-Sn has been directly determined from the NIS spectra measured at T = 100 K and T = 300 K. An excellent agreement has been found with the phonon DOS obtained theoretically by previous calculations. Moreover, dynamical and thermodynamical properties of {beta}-Sn extracted from the determined DOS, such as the Lamb-Moessbauer factor and the specific heat, are found to be in good agreement with previously published results. As a first application of {sup 119}Sn NFS experiments at high pressure, the system U(In{sub 1-x}Sn{sub x}){sub 3} has been chosen. (orig.)

  15. Study of B<sup>0sup> → $\\bar{D}$<sup>*0sup> Decay and Measurement of sin(2β)

    Energy Technology Data Exchange (ETDEWEB)

    Bomben, Marco [Univ. of Trieste (Italy)

    2007-09-18

    This thesis describes a measurement of a CP violating asymmetry in neutral B meson decays, <sup>0sup> → $\\bar{D}$<sup>*0sup>, where D<sup>*0sup> is a charmed meson and h<sup>0sup> is a light meson, performed on data collected by the BABAR experiment at the SLAC asymmetric-energy electron-positron collider PEP-II.

  16. Search for New Physics in the B<sup>0sup>2→J/ΨΦ and B<sup>0sup>2→ΦΦ Decays at CDF

    Energy Technology Data Exchange (ETDEWEB)

    Dorigo, Mirco [Univ. of Trieste (Italy)

    2012-12-01

    We present a search for physics beyond the standard model (SM) through a measurement of the violation of the charge-parity (CP) symmetry in two decays of the B<sup>0sup>2 meson using data collected by the Collider Detector at Fermilab (CDF) in proton-antiproton collisions at the center-of-mass energy of 1.96TeV. We exploit the decays B<sup>0sup>2→J/Ψ(→ μ<sup>+μ->)(→ K<sup>+K->) and B<sup>0sup>2→Φ (→ K<sup>+K->)Φ(→ K<sup>+K->), for which the SM accurately predicts very small or vanishing CP violation; both decay modes are very sensitive to new sources of CP violation expected in a broad class of SM extensions. We analyze the time-dependent CP asymmetry of the B<sup>0sup>2→J/ΨΦ decays collected in the full CDF Run II dataset for providing the final measurement of the B<sup>0sup>2 -¯B<sup>0sup>2 mixing phase, 2βs, and we present the first measurement of CP violation in B<sup>0sup>2→ΦΦ decays, through the determination of two time-integrated CP asymmetries, Av and Au, using an original method developed in this work. We find: -0.06 < βs < 0.30 at the 68% confidence level; Av = (-12.0 ± 6.4(stat) ± 1.6(syst))%; and Au = (-0.7 ± 6.4(stat) ± 1.8(syst))%. In addition, we provide measurements of the decay width difference between the light and heavy mass eigenstates of the B<sup>0sup>2 meson,ΔΓs 0.068 ± 0.026(stat) ± 0.009(syst) ps<sup>-1sup>; and of their mean lifetime, τs = 1.528 ± 0.019(stat) ± 0.009(syst) ps. All results are among the most precise determinations from a single experiment and exhibit an excellent agreement with the SM predictions.

  17. First observation of CP violation in B¯<sup>0sup> → D<sup>(*)>CP h<sup>0sup> decays by a combined time-dependent analysis of BaBar And Belle Data

    Energy Technology Data Exchange (ETDEWEB)

    Abdesselam, A. [Univ. of Tabuk, Tabuk (Kingdom of Saudi Arabia). et al.

    2015-09-16

    We report a measurement of the time-dependent CP asymmetry of B¯<sup>0sup> → D<sup>(*)CPh>0sup> decays, where the light neutral hadron h<sup>0sup> is a π<sup>0sup>, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K<sup>+K–>, K<sup>0sup>Sπ>0sup>, or K<sup>0sup>Sω. The measurement is performed combining the final data samples collected at the Υ(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10<sup>6sup> BB¯ pairs recorded by the BABAR detector and (772±11)×10<sup>6sup> BB¯ pairs recorded by the Belle detector. We measure the CP asymmetry parameters –ηfS=+0.66±0.10(stat)±0.06(syst) and C=–0.02±0.07(stat)±0.03(syst). These results correspond to the first observation of CP violation in B¯<sup>0sup> → D<sup>(*)CPh>0sup> decays. As a result, the hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.

  18. Thermal analyzes of phosphate glasses doped with Yb{sup 3+} and ZnTe nanocrystals

    Energy Technology Data Exchange (ETDEWEB)

    Freitas, A.M.; Bell, M.J.V. [Laboratório de Espectroscopia de Materiais, Departamento de Física, ICE, Universidade Federal de Juiz de Fora, 36036-330 Juiz de Fora, MG (Brazil); Anjos, V., E-mail: virgilio@fisica.ufjf.br [Laboratório de Espectroscopia de Materiais, Departamento de Física, ICE, Universidade Federal de Juiz de Fora, 36036-330 Juiz de Fora, MG (Brazil); Pinheiro, A.S.; Dantas, N.O. [Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS), Instituto de Física da Universidade Federal de Uberlândia, CP 593, CEP 38400-902 Uberlândia, MG (Brazil)

    2016-01-15

    This work studies the thermal properties of a glass matrix called PZABP doped with ZnTe and co-doped with Yb{sup 3+} with nominal composition 60P{sub 2}O{sub 5}, 15ZnO, 5Al{sub 2}O{sub 3}, 10BaO, and 10 PbO (mol%). The presence of ZnTe results in the formation of nanocrystals which are evidenced by optical absorption, X-Ray Diffraction (XRD) and Raman scattering. Thermal lens and Volumetric Heat Capacity techniques were used to investigate thermal diffusivity (D), thermal conductivity (K) and optical path variation with temperature (ds/dT). The outcomes indicate high values for the thermal diffusivity and a relatively small thermal conductivity, i.e., around 2.6×10{sup −3} cm{sup 2}/s and 3.4×10{sup −3} W cm{sup −1} K{sup −1}, respectively. On the other hand, a low ds/dT value, 1.0×10{sup −6} K{sup −1}, was obtained as required for an active laser medium. Moreover, it has been observed that the matrix allows high concentration of dopants without compromising its thermal properties. As a result, PZABP glasses may be pointed out as a promising material to applications in high power photonics devices. - Highlights: • UV transparentglass matrix (PZABP) is used for Yb{sup 3+}doping. • Bulk like and quantum dots like crystals of ZnTe were grown. • Thermal properties point out PZABP as a material to high power photonics devices.

  19. A study of CP violation in B{sup ±}→DK{sup ±} and B{sup ±}→Dπ{sup ±} decays with D→K{sub S}{sup 0}K{sup ±}π{sup ∓} final states

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andreotti, M. [Sezione INFN di Ferrara, Ferrara (Italy); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2014-06-02

    A first study of CP violation in the decay modes B{sup ±}→[K{sub S}{sup 0}K{sup ±}π{sup ∓}]{sub D}h{sup ±} and B{sup ±}→[K{sub S}{sup 0}K{sup ∓}π{sup ±}]{sub D}h{sup ±}, where h labels a K or π meson and D labels a D{sup 0} or D{sup ¯0} meson, is performed. The analysis uses the LHCb data set collected in pp collisions, corresponding to an integrated luminosity of 3 fb{sup −1}. The analysis is sensitive to the CP-violating CKM phase γ through seven observables: one charge asymmetry in each of the four modes and three ratios of the charge-integrated yields. The results are consistent with measurements of γ using other decay modes.

  20. DPAC measurements on 129sup(m)TeSi

    International Nuclear Information System (INIS)

    Kemerink, G.J.; Pleiter, F.; Arendes, A.R.

    1981-01-01

    Using results of DPAC measurements on 129 sup(m)TeSi it is shown that the absorption lines in the Moessbauer spectra obtained with unannealed implanted sources must be ascribed mainly as belonging to a quadrupole split multiplet. (orig.)

  1. Study of Charged Particle Species Produced in Association with $\\bar{B}$<sup>0sup>, B<sup>->, and $\\bar{B}$$0\\atop{s}$ Mesons in p$\\bar{p}$ collisions at √s = 1.96-TeV

    Energy Technology Data Exchange (ETDEWEB)

    Usynin, Denys [Univ. of Pennsylvania, Philadelphia, PA (United States)

    2005-01-01

    The authors study the yields of charged kaons, charged pions, and protons produced in association with B mesons produced in proton-antiproton collisions at center of mass energy 1960 GeV using 355 pb<sup>-1sup> of data collected with the CDF detector at the Fermilab Tevatron. This is the first reported measurements of these yields at a hadron collider. The B mesons are reconstructed using their semileptonic decays: B<sup>0sup> → ℓ<sup>+D->X, D<sup>-> → K<sup>+π-π->; B<sup>0sup> → ℓ<sup>+D*->X, D*<sup>-> → π<sup>-$\\bar{D}$>0sup>,$\\bar{D}$>0sup> → K<sup>+π->; B<sup>+> → ℓ<sup>+$\\bar{D}$>0sup>X, $\\bar{D}$<sup>0sup> → K<sup>+π->; Bs→ℓ<sup>+>D$-\\atop{s}$ X, D$-\\atop{s}$ → π<sup>->Φ,Φ → K<sup>+K->. The K, π, and p are identified using the Time of Flight detector (TOF), the CDF spectrometer, and the specific ionization (dE/dx) measured in the central drift chamber (COT). The fraction of charged kaons produced in association with $\\bar{B}$$0\\atop{s}$ mesons is found to be larger than the fraction produced in association with the $\\bar{B}$$0\\atop{s}$ and B<sup>-> mesons, as expected from naive models of heavy quark hadronization to mesons. The particle species yields are found to be in qualitative agreement with simulation of B meson production in hadron collisions from the PYTHIA Monte Carlo, although the yield of kaons around $\\bar{B}$$0\\atop{s}$ mesons is found to be larger in the simulation when compared to the data. These studies are important for understanding methods of identifying the flavor of $\\bar{B}$$0\\atop{s}$ mesons in measurement of $\\bar{B}$$0\\atop{s}$ flavor oscillations and charge conjugation-parity (CP) violation in $\\bar{B}$$0\\atop{s}$ meson decays.

  2. Production of {pi}{sup 0}{pi}{sup 0} and {pi}{sup +}{pi}{sup +} pairs in proton-proton collisions

    Energy Technology Data Exchange (ETDEWEB)

    Skorodko, Tatiana

    2009-07-17

    The {pi}{sup 0}{pi}{sup 0} production in proton-proton collisions has been measured in the energy range from threshold up to 1.3 GeV using the WASA 4{pi} detector setup with an internal pellet target at the CELSIUS storage ring in Uppsala. In addition the {pi}{sup +}{pi}{sup +} production has been measured at an incident energy of 1.1 GeV. The {pi}{sup 0}{pi}{sup 0} and {pi}{sup +}{pi}{sup +} data taken at WASA constitute the first exclusively measured samples of solid statistics in the considered energy range. Total and differential cross sections for the pp{yields}pp{pi}{sup 0}{pi}{sup 0} and pp{yields}nn{pi}{sup +}{pi}{sup +} reactions are systematically compared to the Valencia model predictions. At incident energies close to threshold, i.e. up to 0.9 GeV, the {pi}{sup 0}{pi}{sup 0} data can be successfully explained by excitation and decay of the Roper resonance. Its direct decay into the N{sigma} channel is found to be by far the dominating two-pion decay process. in favor of a monopole excitation of the Roper resonance. At energy T{sub p}>1 GeV, i.e. in the energy region, which is beyond the Roper excitation but at the onset of {delta}{delta} excitation, a behavior is observed which is different from the theoretical prediction both in differential and total cross sections. The differential cross sections for {pi}{sup 0}{pi}{sup 0} channel in the {delta}{delta} region can be described, if the special configuration ({delta}{delta}){sub 0} is assumed. Moreover, the {pi}{sup 0}{pi}{sup 0} data exhibit a small systematic low-mass enhancement in the {pi}{sup 0}{pi}{sup 0} invariant mass spectrum. The total pp{pi}{sup 0}{pi}{sup 0} cross sections fall behind theoretical predictions, whereas the nn{pi}{sup +}{pi}{sup +} cross section is a factor of five larger that expected. A model-unconstrained isospin decomposition of the total cross sections points to a s-channel-like energy dependence of the Roper excitation as well as to a significant contribution of an

  3. Application of inverse kinematics to [sup 1]H+[sup 23]Na[yields][sup 12]C+[sup 12]C

    Energy Technology Data Exchange (ETDEWEB)

    Bennett, S.J. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Clarke, N.M. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Freer, M. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Fulton, B.R. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Hall, S.J. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Karban, O. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Murgatroyd, J.T. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Tungate, G. (School of Physics and Space Research, Birmingham Univ. (United Kingdom)); Gyapong, G.J. (Dept. of Physics, York Univ. (United Kingdom)); Jarvis, N.S. (Dept. of Physics, York Univ. (United Kingdom)); Watson, D.L. (Dept. of Physics, York Univ. (United Kingdom)); Rae, W.D.M. (Dept. of Nuclear Physics, Oxford Univ. (United Kingdom)); Smith, A.E. (Dept. of Nuclear; Charissa Collaboration

    1993-08-15

    Some experimental techniques used in the measurement and analysis of inverse kinematic reactions are described and applied to a kinematically complete study of the [sup 1]H([sup 23]Na, [sup 12]C)[sup 12]C reaction at an incident energy of 180 MeV. An excitation function is obtained for the energy range of 18.5 to 19.2 MeV in [sup 24]Mg*; equivalent to proton energies from 7.1 MeV to 7.8 MeV for the [sup 23]Na(p, [sup 12]C)[sup 12]C reaction. (orig.)

  4. Observation of. lambda. -hypernuclei in the reaction /sup 12/C(. pi. /sup +/,K/sup +/)/sub. lambda. //sup 12/C

    Energy Technology Data Exchange (ETDEWEB)

    Milner, E.C.

    1985-12-01

    The observation of ..lambda..-hypernuclear levels in /sub ..lambda..//sup 12/C by associated production through the (..pi../sup +/,K/sup +/) reaction is reported. Spectrometers used in the measurements are discussed. The /sub ..lambda..//sup 12/C excitation energy spectra were recorded at laboratory scattering angles of 5.6/sup 0/, 10.3/sup 0/, and 15.2/sup 0/. The spectra show two major peaks - one attributed to the ground state, and one about 11 MeV higher in excitation. The peak near 11 MeV excitation energy is believed to be almost entirely composed of a multiplet of three J/sup ..pi../ = 2/sup +/ states. Relativistic DWBA calculations imply support for the expectation that higher spin states are preferentially populated in the (..pi../sup +/,K/sup +/) reaction, compared to the (K/sup -/,..pi../sup -/) reaction in which lower spin states are excited. 29 refs., 40 figs.

  5. Activity concentrations of /sup 226/Ra, /sup 228/Ra, /sup 210/Pb, /sup 40/K and /sup 7/Be and their temporal variations in surface air

    Energy Technology Data Exchange (ETDEWEB)

    Hoetzl, H.; Winkler, R.

    1987-01-01

    Activity concentrations of the long-lived natural radionuclides /sup 226/Ra, /sup 228/Ra, /sup 210/Pb, /sup 40/K and of /sup 7/Be in surface air were measured twice monthly at a semi-rural location 10 km north of Munich (FRG) for at least three years. For the time interval 1983-1985, all values were found to be distributed log-normally, with geometric means (in ..mu..Bq m-./sup 3/) of 1.2 for /sup 226/Ra, 0.5 for /sup 228/Ra, 580 for /sup 210/Pb, 12 for /sup 40/K and 3500 for /sup 7/Be. Reflecting their common origin, the activity concentrations of /sup 226/Ra and /sup 40/K are correlated with surface air dust concentrations (geometric mean 59 ..mu..g m/sup -3/). Seasonal variations of /sup 210/Pb and /sup 7/Be air activity concentrations are established for the time interval 1978-1985.. The contribution of local soil activity to the air activity concentrations of these radionuclides and of natural uranium is discussed. Resuspension factors are found to be of the order of 10/sup -9/ m/sup -1/.

  6. Observation of the Decay B sup 0 -> pi sup 0 pi sup 0

    CERN Document Server

    Roodman, A

    2003-01-01

    We present an observation of the decay B sup 0 -> pi sup 0 pi sup 0 based on a sample of 124 million B(bar B) pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46 +- 13 +- 3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction BETA(B sup 0 -> pi sup 0 pi sup 0) = (2.1 +- 0.6 +- 0.3) x 10 sup - sup 6 , averaged over B sup 0 and (bar B) sup 0 decays.

  7. Study of CP-violating Asymmetries in B --> pi{sup +}/-pi{sup -}/+, K{sup +}/-pi{sup -}/+ Decays

    Energy Technology Data Exchange (ETDEWEB)

    Olsen, James D.

    2001-07-30

    We present a preliminary measurement of the time-dependent CP-violating asymmetry parameters S and C in neutral B decays to the {pi}{sup +-}{pi} CP eigenstate, and an updated preliminary measurement of the charge asymmetry in B {yields} K{sup {+-}}{pi} decays. Event yields and CP-violation parameters are determined simultaneously from a multidimensional unbinned maximum likelihood fit. In a data sample consisting of approximately 33 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric B Factory, we find 65{sub -11}{sup +12} {pi}{sup +-}{pi} and 217 {+-} 18 K{sup {+-}}{pi} candidates and measure S = 0.03{sub -0}{sup +0} {+-} 0.11, C = -0.25{sub -0}{sup +0} = -0.25{sub -0}{sup +0} {+-} 0.14, and = -0.07 {+-} 0.08 {+-} 0.02, where the first error is statistical and the second is systematic.

  8. Gamma-line intensity difference method for sup 1 sup 1 sup 7 sup m Sn at high resolution

    CERN Document Server

    Remeikis, V; Mazeika, K

    1998-01-01

    The method for detection of small differences in the gamma-spectrum line intensity for the radionuclide in different environments has been developed for measurements at high resolution. The experiments were realized with the pure germanium planar detector. Solution of the methodical problems allowed to measure the relative difference DELTA IOTA subgamma/IOTA subgamma=(3.4+-1.5)*10 sup - sup 4 of the sup 1 sup 1 sup 7 sup m Sn 156.02 keV gamma-line intensity for the radionuclide in SnO sub 2 with respect to SnS from the difference in the gamma-spectra. The error of the result is caused mainly by the statistical accuracy. It is limited by the highest counting rate at sufficiently high energy resolution and relatively short half-life of sup 1 sup 1 sup 7 sup m Sn. (author)

  9. Diffusion of HTO, {sup 36}Cl{sup -}, {sup 125}I{sup -} and {sup 22}Na{sup +} in Opalinus Clay: Effect of Confining Pressure, Sample Orientation, Sample Depth and Temperature

    Energy Technology Data Exchange (ETDEWEB)

    Van Loon, L.R.; Soler, J.M

    2004-02-01

    Effective diffusion coefficients (D{sub e}), rock capacity factors ({alpha}) and diffusion-accessible porosities ({epsilon}) were measured using the through-diffusion technique. Transport (diffusion) was measured both perpendicular and parallel to the bedding. Special cells that allowed the application of an axial confining pressure were designed. The pressures applied ranged from 1 to 5 MPa for Mont Terri samples and between 4 and 15 MPa for Benken samples, the upper values representing the in-situ confining pressure at both locations. The test solutions used in the experiments were synthetic Opalinus Clay pore water, which has Na and Cl as main components (Mont Terri: I = 0.39 M; Benken: I = 0.20 M). Pressure only had a small effect on the value of the effective diffusion coefficients. In the case of Mont Terri samples, increasing the pressure from 1 to 5 MPa resulted in a decrease of the effective diffusion coefficient of 20% for HTO, 27% for {sup 36}Cl{sup -}, 29% for {sup 125}I{sup -} and 17 % for {sup 22}Na{sup +}. In the case of Benken samples, increasing the pressure from 4 to 15 MPa resulted in a decrease of D{sub e} of 17% for HTO, 22% for {sup 36}Cl{sup -}, 32% for {sup 125}I{sup -} and 17 % for {sup 22}Na{sup +}. Moreover, the effective diffusion coefficients for for {sup 36}Cl{sup -}are smaller than for HTO, which is consistent with an effect arising from anion exclusion. This ion exclusion effect is smaller in samples from Mont Terri than in samples from Benken, which can be explained by the higher ionic strength of the Mont Terri water used in the experiments. The diffusion of {sup 22}Na{sup +} is similar to that of HTO in the case of Mont Terri OPA. For Benken OPA, the D{sub e} value of {sup 22}Na{sup +} is a factor of 2 higher than that of HTO. This last observation cannot be explained so far but is comparable to experimental data from ANDRA (1999) on Callovo-Oxfordian claystones from the Meuse/Haute Same site. {sup 125}I{sup -} is retarded with

  10. Beta-decay half-lives and level ordering of sup 1 sup 0 sup 2 sup m sup , sup g Rh

    CERN Document Server

    Shibata, M; Itoh, S; Itoh, S; Yamamoto, H; Kawade, K; Kasugai, Y; Ikeda, Y

    1998-01-01

    Beta-decay half-lives of the ground state and an isomer of sup 1 sup 0 sup 2 Rh have been determined 207.3(17) d and 3.742(10) y, respectively, by gamma-ray decay curves following each beta-decay. It has been found that a state (2 sup -) which has a shorter half-life (207.3 d) is the ground state from the result that the half-life of the 41.9 keV isomeric gamma-transition was equal to 3.742 y. It has also been confirmed that the 41.9 keV transition is certainly an isomeric transition with X-gamma coincidence measurement.

  11. Radiochemical studies relevant to the production of sup 8 sup 6 Y and sup 8 sup 8 Y at a small-sized cyclotron

    CERN Document Server

    Kettern, K; Spellerberg, S; Coenen, H H; Qaim, S M

    2002-01-01

    Excitation functions were measured by the stacked-foil technique for sup n sup a sup t Sr(p,xn) sup 8 sup 8 sup , sup 8 sup 7 sup m sup , sup g Y reactions from threshold up to 25 MeV. From the measured cross sections integral yields of sup 8 sup 8 Y, sup 8 sup 7 mY and sup 8 sup 7 sup g Y were calculated. The optimum energy range for the production of sup 8 sup 8 Y is Ep=14->9 MeV; the sup 8 sup 8 Y yield amounts to 1.75 MBq (47.3 mu Ci/mu A.h) and the sup 8 sup 7 Y and sup 8 sup 7 sup m Y impurities to 2.0 and 4.4%, respectively. The isomeric cross section ratio for the pair sup 8 sup 7 sup m sup , sup g Y was determined as a function of incident proton energy and the results are discussed in terms of the spins of the two isomeric states involved. Medium scale production of both sup 8 sup 6 Y and sup 8 sup 8 Y has been carried out more than 15 times each using the (p,n) reaction. In the former case 96.3% enriched sup 8 sup 6 SrCO sub 3 was used as target material, and in the latter sup n sup a sup t SrCO su...

  12. Measurement of the ratio of branching fractions B(B{sup 0}{yields}K{sup Low-Asterisk 0}{gamma})/B(B{sub s}{sup 0}{yields}{phi}{gamma}) and the direct CP asymmetry in B{sup 0}{yields}K{sup Low-Asterisk 0}{gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adametz, A. [Physikalisches Institut, Ruprecht-Karls-Universitaet Heidelberg, Heidelberg (Germany); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); and others

    2013-02-01

    The ratio of branching fractions of the radiative B decays B{sup 0}{yields}K{sup Low-Asterisk 0}{gamma} and B{sub s}{sup 0}{yields}{phi}{gamma} has been measured using an integrated luminosity of 1.0 fb{sup -1} of pp collision data collected by the LHCb experiment at a centre-of-mass energy of {radical}(s)=7 TeV. The value obtained is (B(B{sup 0}{yields}K{sup Low-Asterisk 0}{gamma}))/(B(B{sub s}{sup 0}{yields}{phi}{gamma})) =1.23{+-}0.06 (stat.){+-}0.04 (syst.){+-}0.10(f{sub s}/f{sub d}), where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions f{sub s}/f{sub d}. Using the world average value for B(B{sup 0}{yields}K{sup Low-Asterisk 0}{gamma}), the branching fraction B(B{sub s}{sup 0}{yields}{phi}{gamma}) is measured to be (3.5{+-}0.4) Multiplication-Sign 10{sup -5}. The direct CP asymmetry in B{sup 0}{yields}K{sup Low-Asterisk 0}{gamma} decays has also been measured with the same data and found to be A{sub CP}(B{sup 0}{yields}K{sup Low-Asterisk 0}{gamma})=(0.8{+-}1.7 (stat.){+-}0.9 (syst.))%. Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations.

  13. SPECTROSCOPIC CONSTANTS OF THE X{sup 1}Σ{sup +} AND 1{sup 3}Π STATES OF AlO{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Sghaier, Onsi; Linguerri, Roberto; Hochlaf, Majdi [Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, F-77454 Marne-la-Vallée (France); Mogren, Muneerah Mogren Al [Chemistry Department, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451 (Saudi Arabia); Francisco, Joseph S., E-mail: hochlaf@univ-mlv.fr [Department of Chemistry and Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, IN-47906 (United States)

    2016-08-01

    Using both standard and explicitly correlated ab initio methods in conjunction with several atomic basis sets, the ground state of AlO(X{sup 2}Σ{sup +}) and the two lowest electronic states of AlO{sup +} ({sup 1}Σ{sup +} and {sup 3}Π) are investigated. Potential energy curves for these species are mapped, which are incorporated later to solve the nuclear motion problem. Benchmark computations on AlO(X{sup 2}Σ{sup +}) are used to determine the reliability of the theoretical methods and basis sets used for an accurate description of aluminum oxide compounds. The electronic ground state of AlO{sup +} is X{sup 1}Σ{sup +}, followed by the low-lying 1{sup 3}Π state. For both cationic electronic states, a set of spectroscopic parameters are recommended that may help in the identification of this ion in laboratory and astrophysical media. An accurate estimation of the adiabatic ionization energy of AlO, AIE = 9.70 eV, is also reported.

  14. Counting efficiency of the lung monitor for sup 2 sup 4 sup 1 Am

    CERN Document Server

    Kinase, S; Sekiguchi, M

    2003-01-01

    The counting efficiencies of two lung monitor systems, phoswich detector system and germanium detector system, were measured for lungs and liver loaded with sup 2 sup 4 sup 1 Am in the Japan Atomic Energy Research Institute (JAERI) phantom. It was found that the germanium detector system for sup 2 sup 4 sup 1 Am loaded lungs counting gives the full-energy peak predominated by the absorption of the gamma-ray photon in a single photoelectric interaction and is less sensitive to sup 2 sup 4 sup 1 Am loaded liver. The sup 2 sup 4 sup 1 Am loaded lung activities could be reasonably estimated using germanium detector system rather than phoswich detector system.

  15. Evaluation of steam sterilization conditions for [{sup 18}F]fludeoxyglucose

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Priscilla F.; Nascimento, Leonardo T.; Valente, Eduardo S.; Silva, Juliana B.; Silveira, Marina B.; Ferreira, Soraya Z., E-mail: somafe@cdtn.b [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil). Unidade de Pesquisa e Producao de Radiofarmacos

    2011-07-01

    [{sup 18}F]Flu deoxyglucose ({sup 18}FDG) is the most commonly used radiopharmaceutical for positron emission tomography. Sterile filtration of the final product into sterile vials using 0.22 {mu}m filter membrane is usually adopted for {sup 18}FDG. However, Good Manufacturing Practice (GMP) guidelines recommend heat sterilization as the method of choice to ensure sterility of pharmaceutical preparations. The aim of this study was to essay different steam sterilization conditions in order to choose the best one for {sup 18}FDG. Three different sterilization conditions were essayed. The first one at 121 deg C for 15 minutes, the second one at 135 deg C for 3.5 minutes and the third one at 133 deg C for 2 minutes. {sup 18}FDG pH-formulation was kept around 6.0. At the end of autoclave cycles, {sup 18}FDG sterility was evaluated by direct inoculation of {sup 18}FDG in culture media and radiochemical purity was determined by TLC and HPLC. Results demonstrated that all essayed conditions were able to ensure {sup 18}FDG sterility, but caused a decrease in radiochemical purity of {sup 18}FDG. Autoclave cycle at 133 deg C for 2 minutes was the best essayed condition for {sup 18}FDG terminal sterilization, once it provided the greater radiochemical purity value and took less time. {sup 18}FDG was able to meet specifications after autoclave cycles, what supports the application of steam sterilization in routine {sup 18}FDG production, in compliance with GMP. (author)

  16. Evidence for the Rare Decay B -> K*(ell) sup + (ell) sup - land Measurement of the B -> K(ell) sup + (ell) sup - Branching Fraction

    CERN Document Server

    Berryhill, J W

    2003-01-01

    We present evidence for the flavor-changing neutral current decay B -> K*(ell) sup + (ell) sup - and a measurement of the branching fraction for the related process B -> K(ell) sup + (ell) sup - , where (ell) sup + (ell) sup - is either an e sup + e sup - or mu sup +mu sup - pair. These decays are highly suppressed in the Standard Model, and they are sensitive to contributions from new particles in the intermediate state. The data sample comprises 123 x 10 sup 6 UPSILON(4S) -> B(bar B) decays collected with the BABAR detector at the PEP-II e sup + e sup - storage ring. Averaging over K* isospin and lepton flavor, we obtain the branching fractions BETA(B -> K(ell) sup + (ell) sup -) = (0.65 sub - sub 0 sub . sub 1 sub 3 sup + sup 0 sup . sup 1 sup 4 +- 0.04) x 10 sup - sup 6 BETA(B -> K*(ell) sup + (ell) sup -) = (0.88 sub - sub 0 sub . sub 2 sub 9 sup + sup 0 sup . sup 3 sup 3 +- 0.10) x 10 sup - sup 6 , where the uncertainties are statistical and systematic, respectively. The significance of the B -> K(ell) ...

  17. {sup 197}Au irradiation study of phase-change memory cell with GeSbTe alloy

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Liangcai; Song, Zhitang; Lian, Jie; Rao, Feng; Liu, Bo; Song, Sannian; Liu, Weili; Feng, Songlin [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Zhou, Xilin; Liu, Xuyan [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100080 (China)

    2010-10-15

    A {sup 197}Au ion source was used to irradiate a Ge{sub 2}Sb{sub 2}Te{sub 5}-alloy-based phase-change memory (PCM) cell to study the ion-irradiation effect on the properties of the cell. The PCM devices with the tungsten (W) heating electrode of 260 nm diameter were fabricated by 0.18 {mu}m complementary metal-oxide-semiconductor (CMOS) technology. Four different doses (10{sup 10}, 10{sup 11}, 10{sup 12}, and 5 x 10{sup 12} ions/cm{sup 2}, respectively) were applied to irradiate the PCM cell. The samples before and after irradiation were characterized by current-voltage and resistance measurements at room temperature. It is found that the cell properties (resistance value of the amorphous and crystalline states, threshold voltage, and current for phase transition, etc.) have hardly changed, even for the sample irradiated up to 10{sup 12} ions/cm{sup 2} dose, and the cell still has good set-reset operation ability (above 10{sup 5} cycles). Furthermore, the resistance ratio remains at 1000 even after 10{sup 5} cycles of the set-reset operation. The results show the PCM cell with Ge{sub 2}Sb{sub 2}Te{sub 5} alloy has a strong ion-irradiation tolerance. (Abstract Copyright [2010], Wiley Periodicals, Inc.)

  18. Evaluation of fission cross sections and covariances for {sup 233}U, {sup 235}U, {sup 238}U, {sup 239}Pu, {sup 240}Pu, and {sup 241}Pu

    Energy Technology Data Exchange (ETDEWEB)

    Kawano, Toshihiko [Kyushu Univ., Fukuoka (Japan); Matsunobu, Hiroyuki [Data Engineering, Inc. (Japan); Murata, Toru [AITEL Corporation, Tokyo (JP)] [and others

    2000-02-01

    A simultaneous evaluation code SOK (Simultaneous evaluation on KALMAN) has been developed, which is a least-squares fitting program to absolute and relative measurements. The SOK code was employed to evaluate the fission cross sections of {sup 233}U, {sup 235}U, {sup 238}U, {sup 239}Pu, {sup 240}Pu, and {sup 241}Pu for the evaluated nuclear data library JENDL-3.3. Procedures of the simultaneous evaluation and the experimental database of the fission cross sections are described. The fission cross sections obtained were compared with evaluated values given in JENDL-3.2 and ENDF/B-VI. (author)

  19. Study of <sup>4sup>He(e, e'p)<sup>3sup>H through the (e, e'p) reaction at Q<sup>2sup> = 2(GeV/c)<sup>2sup> and xb = 1.24

    Energy Technology Data Exchange (ETDEWEB)

    Iqbal, Sophia [California State Univ., Los Angeles, CA (United States)

    2013-12-09

    The structure and dynamics of <sup>4sup>He can be studied through <sup>4sup>He(e,e'p) coincidence measurements at high momentum transfers. Using the Hall A high resolution spectrometers and a cryogenic <sup>4sup>He target, the SRC (short range correlation) and E08009 experiments held at Jefferson Lab in April 2011 measured the entire range of missing momentum from 0.0 GeV/c to 0.9 GeV/c. The observables of interest in this experiment (E08009) are the missing energy and missing momenta for producing the triton (<sup>3sup>H) ground state. This thesis concentrates on missing momentum values of 153 and 353 MeV/c. Cross sections are calculated and compared to theory.

  20. Measurement of the Exclusive Branching Fractions B{sup 0} {yields} {eta}K*{sup 0} and B{sup +} {yields} {eta}K*{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.

    2004-02-12

    The authors present the results of searches for B decays to the two charmless two-body final states B{sup 0} {yields} {eta}K*{sup 0} and B{sup +} {yields} {eta}K*{sup +}, based on 20.7 fb{sup -1} of data collected in 1999 and 2000 with the BABAR detector at PEP-II. They find the branching fractions {Beta}(B{sup 0} {yields} {eta}K*{sup 0}) = (19.8 {sub -5.6}{sup +6.5} {+-} 1.7) x 10{sup -6} and {Beta}(B{sup +} {yields} {eta}K*{sup +}) = (22.1 {sub -9.2}{sup +11.1} {+-} 3.3) x 10{sup -6}, where the first error quoted is the statistical and the second systematic.

  1. Measurement of BETA(B sup 0 -> D* sub s sup + D* sup -) and Determination of the D sub s sup + -> phi pi sup + Branching Fraction with a Partial-Reconstruction Method

    CERN Document Server

    Covarelli, R

    2003-01-01

    The present model-independent measurements of the branching fractions BETA(B sup 0 -> D* sub s sup + D* sup -) and BETA(D sub s sup + -> phi pi sup +) based on 19.3 fb sup - sup 1 of data collected by the BABAR detector at the PEP-II e sup + e sup - B Factory. Neutral B-meson decays to the D* sub s sup + D* sup - final state are selected with a partial reconstruction of the D* sub s sup +; that is, only the D* sup - and the soft photon from the decay D* sub s sup + -> D sub s sup +gamma are reconstructed. The branching fraction BETA(B sup 0 -> D* sub s sup + D* sup -) is extracted from these event yields, while BETA(D sub s sup + -> phi pi sup +) is determined by combining this result with a previous measurement of the product BETA(B sup 0 -> D* sub s sup + D* sup -) x BETA(D sub s sup + -> phi pi sup +) with partial reconstruction of the D* sup -. They obtain the following preliminary results: BETA(B sup 0 -> D* sub s sup + D* sup -) = (1.50 +- 0.16 +- 0.12)%, BETA(D sub s sup + -> phi pi sup +) = (4.7 +- 0....

  2. Somatostatin receptor PET in neuroendocrine tumours: {sup 68}Ga-DOTA{sup 0},Tyr{sup 3}-octreotide versus {sup 68}Ga-DOTA{sup 0}-lanreotide

    Energy Technology Data Exchange (ETDEWEB)

    Putzer, Daniel; Kroiss, Alexander; Waitz, Dietmar; Gabriel, Michael; Uprimny, Christian; Guggenberg, Elisabeth von; Decristoforo, Clemens; Warwitz, Boris; Virgolini, Irene Johanna [Innsbruck Medical University, Department of Nuclear Medicine, Innsbruck (Austria); Traub-Weidinger, Tatjana [Vienna Medical University, Department of Nuclear Medicine, Vienna (Austria); Widmann, Gerlig [Innsbruck Medical University, Department of Radiology, Innsbruck (Austria)

    2013-03-15

    The aim of this study was to evaluate the impact of {sup 68}Ga-labelled DOTA{sup 0}-lanreotide ({sup 68}Ga-DOTA-LAN) on the diagnostic assessment of neuroendocrine tumour (NET) patients with low to moderate uptake on planar somatostatin receptor (SSTR) scintigraphy or {sup 68}Ga-labelled DOTA{sup 0},Tyr{sup 3}-octreotide ({sup 68}Ga-DOTA-TOC) positron emission tomography (PET). Fifty-three patients with histologically confirmed NET and clinical signs of progressive disease, who had not qualified for peptide receptor radionuclide therapy (PRRT) on planar SSTR scintigraphy or {sup 68}Ga-DOTA-TOC PET (n = 38) due to lack of tracer uptake, underwent {sup 68}Ga-DOTA-LAN PET to evaluate a treatment option with {sup 90}Y-labelled lanreotide according to the MAURITIUS trial. The included patients received 150 {+-} 30 MBq of each radiopharmaceutical intravenously. PET scans were acquired 60-90 min after intravenous bolus injection. Image results from both PET scans were compared head to head, focusing on the intensity of tracer uptake in terms of treatment decision. CT was used for morphologic correlation of tumour lesions. To further evaluate the binding affinities of each tracer, quantitative and qualitative values were calculated for target lesions. {sup 68}Ga-DOTA-LAN and {sup 68}Ga-DOTA-TOC both showed equivalent findings in 24/38 patients when fused PET/CT images were interpreted. The sensitivity, specificity and accuracy of {sup 68}Ga-DOTA-LAN in comparison to CT were 0.63, 0.5 and 0.62 (n = 53; p < 0.0001) and for {sup 68}Ga-DOTA-TOC in comparison to CT 0.78, 0.5 and 0.76 (n = 38; p < 0.013), respectively. {sup 68}Ga-DOTA-TOC showed a significantly higher maximum standardized uptake value (SUV{sub max}) regarding the primary tumour in 25 patients (p < 0.003) and regarding the liver in 30 patients (p < 0.009) compared to {sup 68}Ga-DOTA-LAN. Corresponding values of both PET scans for tumour and liver did not show any significant correlation. {sup 68}Ga

  3. Study of charge-symmetry violation in. pi. /sup +/ and. pi. /sup -/ elastic scattering from /sup 3/H and /sup 3/He

    Energy Technology Data Exchange (ETDEWEB)

    Pillai, C.; Barlow, D.B.; Nefkens, B.M.K.; Berman, B.L.; Briscoe, W.J.; Mokhtari, A.; Petrov, A.M.; Sadler, M.E.

    1988-06-30

    New data on the charge-symmetric superratio R and the simple ratios r/sub 1/' and r/sub 2/' are reported for ..pi../sup +/ and ..pi../sup -/ elastic scattering from /sup 3/H and /sup 3/He at T/sub n/=142, 180, and 220 MeV at theta/sub ..pi../(lab) from 40/sup 0/ to 110/sup 0/; R=dsigma(..pi../sup +3/H)dsigma(..pi../sup -3/H)/dsigma(..pi../sup -3/He)dsigma(..pi../sup +3/ He), r/sub 1/'=dsigma(..pi../sup +3/H)dsigma(..pi../sup -/d)/dsigma(..pi../sup -3/He)dsigma(..pi../sup +/d), and r/sub 2/'=dsigma(..pi../sup -3/H)dsigma(..pi../sup +/d)/dsigma(..pi../sup +3/He)dsigma(..pi../sup -/d). We find that R > 1, r/sub 1/' approx. = 1, and r/sub 2/' > 1 at all energies and angles. These results are not accounted for by any of the available calculations which attempt to include only electromagnetic effects. This disagreement suggests that the violation of charge symmetry is due to a combination of strong and electromagnetic effects.

  4. Observation of f sub 1 (1285) yields. pi. sup +. pi. sup -. pi. sup +. pi. sup - in radiative J/. psi. decays

    Energy Technology Data Exchange (ETDEWEB)

    Bolton, T; Bunnell, K O; Cassell, R E; Coward, D H; Labs, J; Odian, A; Pitman, D; Schindler, R H; Toki, W [Stanford Linear Accelerator Centre, Stanford Univ., CA (United States); Brown, J S; Burnett, T H; Li, A; Mir, R; Mockett, P M; Parrish, L; Willutzki, H J [Dept. of Physics, Univ. Washington, Seattle, WA (United States); Burchell, M; Drinkard, J; Gatto, C; Heusch, C A; Lockman, W S; Sadrozinski, H F.W.; Scarlatella, M; Schalk, T L; Seiden, A; Weinstein, A J; Xu, R [Santa Cruz Inst. for Particle Physics, Univ. California, CA (United States); Coffman, D; DeJongh, F; Dubois, G P; Eigen, G; Hitlin, D G; Matthews, C G; Richman, J D; Wisniewski, W J; Zhu, Y [Dept. of Physics, California Inst. of Tech., Pasadena, CA (United States); Eisenstein, B I; Freese, T; Gladding, G; Izen, J M; Kim, P C; Stockdale, I E; Tripsas, B [Dept. of Physics, Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States); Mallik, U; Wang, M Z [Dept. of; Mark III Collaboration

    1992-04-02

    We present an analysis of J/{psi}{yields}{gamma}f{sub 1}(1285), f{sub 1}(1285){yields}{pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -}, using the Mark III detector at SPEAR, based on 5.8x10{sup 6} produced J/{psi} events. We measure B(J/{psi}{yields}{gamma}f{sub 1}(1285), f{sub 1}(1285){yields}{pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -})=(4.8{+-}1.3{+-}0.9)x10{sup -5}. We obtain a new measurement of the absolute branching ratio of J/{psi}{yields}{gamma}f{sub 1}(1285). The mixing angle of the f{sub 1}(1285) and the f{sub 1}(1420) in the 1{sup ++} nonet is determined. (orig.).

  5. Formation of La{sup 3+}, Pr{sup 3+}, Eu{sup 3+}, Er{sup 3+}, and Lu{sup 3+} complexes with chloride ions, in aqueous medium; Formacion de complejos de La{sup 3+}, Pr{sup 3+}, Eu{sup 3+}, Er{sup 3+} y Lu{sup 3+} con iones cloruro, en medio acuoso

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez R, E.; Jimenez R, M.; Solache R, M. [ININ, 52750 La Marquesa, Estado de Mexico (Mexico)

    2007-07-01

    The constants of stability of the complexes of La{sup 3+}, Pr{sup 3+}, Eu{sup 3+}, Er{sup 3+}, and Lu{sup 3+} with Cl{sup -} ions, its were determined, in the aqueous medium of HCI - HClO{sub 4} and by a solvent extraction method. The dinonyl naphtalene sulfonic acid in n-heptane was used as extractant. The lanthanides concentration, it was measured by a VIS spectrophotometry method and by another radiochemical. The ions specific interaction theory (SIT) it was used for the extrapolation to ionic force 0 M. The results indicate that the stability constants of the LnCI{sup 2+} species diminishes when increasing the ion force and the charge density. (Author)

  6. Enhancement of associated H{sup {+-}}W{sup -+} productionin the NMSSM

    Energy Technology Data Exchange (ETDEWEB)

    Enberg, R. [Uppsala Univ., Uppsala (Sweden). Dept. of Physics and Astronomy; Pasechnik, R. [Lund Univ., Lund (Sweden). Dept. of Astronomy and Theoretical Physics; Staal, O. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2011-12-15

    We study the associated production of a charged Higgs and a W boson in high-energy pp collisions at the Large Hadron Collider. This is an interesting process for charged Higgs discovery, or exclusion, since the production cross section could depend strongly on the model, offering potential discriminating power between supersymmetric extensions of the Standard Model with minimal or extended Higgs sectors. We compute the cross section for this process in the next-to-minimal supersymmetric Standard Model (NMSSM), at the tree level for quark-quark scattering and at one-loop level for gluon-gluon scattering. The most important corrections beyond leading order are taken into account using an improved Born approximation. We find that the pp {yields} H{sup {+-}}W{sup -+} cross section can be resonantly enhanced by up to an order of magnitude over its MSSM value (both for {radical}(s)=7 TeV and 14 TeV) through the contributions of heavy, neutral, singlet-dominated Higgs bosons appearing in the s-channel. Since such Higgs mass configurations are normally not possible in the MSSM, the observation of associated H{sup {+-}}W{sup -+} production at the LHC could provide a striking, although indirect, signature of a more complicated Higgs sector. (orig.)

  7. De nouvelles pages du Mu<sup>c>rib <sup>c>an ba<sup>c>ḍ <sup>c>ağā'ib al-Maġrib d'Abū Ḥāmid al-Ġarnāṭī

    Directory of Open Access Journals (Sweden)

    Ducène, Jean-Charles

    2003-06-01

    Full Text Available The travelogue and collection of marvels of Abū Ḥāmid al-Ġarnāṭī —al-Mu<sup>c>rib <sup>c> an ba<sup>c>ḍ <sup>c>ağā'ib al-Maġrib—has only been known until now by the edition in two parts (C. Dubler, 1953 and I. Bejarano, 1991 of the Madrid's manuscript. However this edited text suffers from lacunas and breaks in the narrative, meaning that the original manuscript was defective. But we have found four other manuscripts which enable us to fill in the lacunas. This paper presents the editing of these passages, mainly dealing with the Mediterranean fishes and the author's journey between Egypt and Azerbaydjan.

    El relato de los viajes y la compilación de mirabilia de d'Abū Ḥāmid al- Ġarnāṭī —al-Mu<sup>c>rib <sup>c>an ba<sup>c>ḍ <sup>c>ağā'ib al-Maġrib— se conocen hasta ahora por la edición, en dos partes (C. Dubler, 1953 y I. Bejarano, 1991, del manuscrito de Madrid. Sin embargo, el texto editado contiene blancos y rupturas en la narración, lo que demuestra que el manuscrito de base era defectuoso. Hemos encontrado cuatro manuscritos que permiten llenar estos blancos. Este artículo presenta la edición de estos pasajes, que hablan principalmente de los peces del Mediterráneo y del viaje del autor entre Egipto y Azerbaiyan.

  8. Angular dependence of the sup(6)Li(πsup(+),sup(3)He)sup(3)He reaction

    International Nuclear Information System (INIS)

    McParland, B.J.; Auld, E.G.; Couvert, P.

    1985-02-01

    Angular distributions of the differential cross sections for the pionic fission sup(6)Li(πsup(+),sup(3)He)sup(3)He have been measured at pion energies of 60 and 80 MeV. The differential cross section is found to decrease monotonically with cossup(2)thetasup(*) and is compared with a theoretical prediction

  9. He and Be ternary spontaneous fission of sup 2 sup 5 sup 2 Cf

    CERN Document Server

    Hwang, J K; Ramayya, A V; Hamilton, J H

    2002-01-01

    Ternary and binary fission studies of sup 2 sup 5 sup 2 Cf have been carried out by using the Gammasphere detector array with light charged particle (LCD) detectors. The relative sup 4 He and sup 5 He ternary fission yields were determined. The kinetic energies of the sup 5 He and sup 4 He ternary particles were found to be approximately 11 and 16 MeV, respectively. The sup 5 He particles contribute 10-20 % to the total observed alpha ternary yield. The data indicate that in nuclei with octupole deformations the population for the negative parity bands might be enhanced in the alpha ternary fission. >From LCP-gamma double gated spectra, neutron multiplicity distributions for alpha ternary fission pairs were measured. The average neutron multiplicity decreases about 0.7 AMU in going from the binary to alpha ternary fission in the approximately same mass splittings (104-146). From the analysis of the gamma-gamma matrix gated on the sup 1 sup 0 Be particles, the two fragment pairs of sup 1 sup 3 sup 8 Xe - sup 1...

  10. Measurement of the half-life of sup 1 sup 7 sup 6 Lu

    CERN Document Server

    Nir-El, Y

    1998-01-01

    The half-life of sup 1 sup 7 sup 6 Lu was determined by measuring the disintegration rate of a solution of lutetium oxide, using a calibrated HPGe detector, and found to be (3.69+-0.02)x10 sup 1 sup 0 y. It is recommended that the current adopted value be calculated from the grouping of three published values since 1983, including our value, the weighted mean of which is (3.73+-0.01)x10 sup 1 sup 0 y.

  11. Spectroscopy of {sup 96}Ru and {sup 98}Ru: structures of varied character at N {>=} 52

    Energy Technology Data Exchange (ETDEWEB)

    Reviol, W; Garg, U; Aprahamian, A; Davis, B F; Herr, M C; Naguleswaran, S; Walpe, J C; Ye, D [Notre Dame Univ., IN (United States); Ahmad, I; Carpenter, M P; Janssens, R V.F.; Khoo, T L; Lauritsen, T; Liang, Y [Argonne National Lab., IL (United States)

    1992-08-01

    The authors have investigated the onset of deformation at N {>=} 52 by performing high-spin gamma spectroscopy of {sup 96-98}Ru using the {sup 65}Cu({sup 36}S,pxn) reaction with the Argonne-Notre Dame {gamma}-ray facility. From the coincidence data associated with high multiplicity (k {>=} 8) events, they have established two main band structures in {sup 96-98}Ru which extend the previously-known level schemes significantly (up to > 20 {Dirac_h}). In {sup 96}Ru, one of the newly observed structures consists of five rotation-like E2 transitions and feeds into the known 9{sup (-)} state; the other structure bypasses the first one, and based on the observed level-spacings, is tentatively described as vibration-like. A rotational-like structure above a spin of 8 {Dirac_h}, along with a parallel vibration-like structure, has been observed in {sup 98}Ru as well. The data also contain some evidence for a weak sequence of dipole (presumably M1) transitions in {sup 96}Ru. This structure might be similar to the high-K oblate bands recently observed in {sup 119-123}I and {sup 198-20P}b. 9 refs., 3 figs.

  12. The reaction {sup 48}Ca+{sup 238}U {yields}{sup 286}112{sup *} studied at the GSI-SHIP

    Energy Technology Data Exchange (ETDEWEB)

    Hofmann, S. [Gesellschaft fuer Schwerionenforschung (GSI), D-64291 Darmstadt (Germany); Institut fuer Kernphysik, Johann Wolfgang Goethe-Universitaet, Frankfurt (Germany); Ackermann, D.; Burkhard, H.G.; Heinz, S.; Hessberger, F.P.; Khuyagbaatar, J.; Kindler, B.; Kojouharov, I.; Lommel, B.; Mann, R.; Muenzenberg, G.; Schoett, H.J.; Sulignano, B. [Gesellschaft fuer Schwerionenforschung (GSI), Darmstadt (Germany); Antalic, S.; Saro, S.; Streicher, B.; Venhart, M. [Comenius University, Department of Nuclear Physics and Biophysics, Bratislava (Slovakia); Comas, V.F.; Heredia, J.A. [InSTEC, Habana (Cuba); Dressler, R. [Paul Scherrer Institute, Villigen (Switzerland); Gan, Z. [Chinese Academy of Sciences, Institute of Modern Physics, Lanzhou (China); Kuusiniemi, P. [University of Oulu, CUPP (Finland); Leino, M.; Uusitalo, J. [University of Jyvaeskylae, Department of Physics, Jyvaeskylae (Finland); Nishio, K. [Japan Atomic Energy Agency, Tokai, Ibaraki (Japan); Popeko, A.G.; Yeremin, A.V. [JINR, Flerov Laboratory of Nuclear Reactions, Dubna (Russian Federation)

    2007-06-15

    The fusion reaction of {sup 48}Ca projectiles with {sup 238}U target nuclei was studied at the velocity filter SHIP of GSI in Darmstadt. Two decay chains were measured, which fully confirm data that were previously assigned to the isotope {sup 283}112 in experiments at the Flerov Laboratory in Dubna. Two other events are consistent with a 50% spontaneous-fission (SF) branch of this isotope. The mean value obtained for the half-life of {sup 283}112 is (6.9{sup +6.9}{sub -2.3}) s, the {alpha} energy is (9.520{+-}0.015) MeV, and the total kinetic energy (TKE) of SF is (238{+-}14) MeV. The half-life of the {alpha} decay daughter nucleus {sup 279}Ds is (0.18{sup +0.32}{sub -0.07}) s, and the TKE of SF is (210 {sup +32}{sub -11}) MeV. The cross-section deduced from all four events is (0.72{sup +0.58}{sub -0.35}) pb, measured at an excitation energy of 34.6MeV of the compound nucleus {sup 286}112. (orig.)

  13. Levels of /sup 209/Tl and /sup 211/Pb populated in the /sup 210/Pb(t,. cap alpha. )/sup 209/Tl and /sup 210/Pb(t,d)/sup 211/Pb reactions. [J,. pi.

    Energy Technology Data Exchange (ETDEWEB)

    Ellegaard, C; Barnes, P D [Carnegie-Mellon Univ., Pittsburgh, Pa. (USA); Flynn, E R [Los Alamos Scientific Lab., N.Mex. (USA)

    1976-03-22

    The reactions /sup 210/Pb(t,..cap alpha..)/sup 209/Tl and /sup 210/Pb(t,d)/sup 211/Pb have been studied with 20 MeV tritons. Seven levels in /sup 209/Tl have been identified in the /sup 210/Pb(t,..cap alpha..)/sup 209/Tl reaction. Level spins have been suggested by comparing the observed spectrum with that of the corresponding reaction on /sup 208/Pb. Nineteen levels in /sup 211/Pb were identified in the /sup 210/Pb(t,d)/sup 211/Pb reaction. Angular distributions were measured and lsub(n) values and spectroscopic factors were extracted by DWBA calculations. In both cases the spectra are very similar to the spectra obtained with /sup 208/Pb as a target. The deviations from these simple spectra would appear to be amenable to a description in terms of a coupling of the extra particle or hole to the /sup 210/Pb core.

  14. A Measurement of the Inclusive Z / γ* → μ<sup>+> μ<sup>-> Cross-Section and Study of W and Z Events in proton - anti-proton Collisions at D0

    Energy Technology Data Exchange (ETDEWEB)

    Nurse, Emily L. [Univ. of Manchester (United Kingdom)

    2005-01-01

    A measurement of the inclusive Z/γ* → μ<sup>+> μ<sup>-> cross section for Mμμ > 40 GeV at √s = 1.96 TeV is presented. The measurement is performed using a data sample corresponding to an integrated luminosity of 147.7 pb<sup>-1sup>, collected with the D0 detector at the Tevatron, Fermilab, between September 2002 and October 2003. A total of 14352 di-muon events are selected and a final result of σ(Z/γ*) = 327.8 ± 3.4(stat.) ± 8.4(syst.) ± 21.3(lumi.) pb is obtained. Correcting the number of di-muon events by a factor of 0.885 ± 0.015 for the contribution from pure γ* exchange and Z/γ* interference, the inclusive Z → μ<sup>+> μ<sup>-> cross section is found to be: σ(Z) = 290.1 ± 3.0(stat.) ± 7.4(syst.) ± 18.9(lumi.) pb. Finally, comparisons of W and Z boson pT distributions as measured with D0 during Run I of the Tevatron are compared to HERWIG and MC@NLO predictions. Relevant parameters in the simulations are tuned to obtain the best possible fit to the data. An excellent agreement is found for both HERWIG and MC@NLO.

  15. A re-evaluation of k sub 0 and related nuclear data for the 555.8 keV gamma-line emitted by the sup 1 sup 0 sup 4 sup m Rh- sup 1 sup 0 sup 4 Rh mother-daughter pair for use in NAA

    CERN Document Server

    Corte, F D; Simonits, A; Bossus, D; Sluijs, R V; Pommé, S

    1999-01-01

    A re-evaluation is made of the k sub 0 -factor and related nuclear data for the 555.8 keV gamma-ray of the sup 1 sup 0 sup 4 sup m Rh- sup 1 sup 0 sup 4 Rh mother-daughter pair that are important in neutron activation analysis (NAA). This study considers that the relevant level is also fed by the 4.34 min sup 1 sup 0 sup 4 sup m Rh mother (with an absolute gamma-ray emission probability gamma sub 2 =0.13%) and not only, as assumed in former work, by the 42.3 s sup 1 sup 0 sup 4 Rh daughter isotope (with gamma sub 3 =2.0%). In view of this, generalised equations were developed for both the experimental determination and the analytical use of the k sub 0 -factor and of the associated parameters k sub 0 (m)/k sub 0 (g), Q sub 0 (m) and Q sub 0 (g) [(m): sup 1 sup 0 sup 4 sup m Rh; (g): sup 1 sup 0 sup 4 Rh], requiring the introduction of the gamma sub 2 and gamma sub 3 data and also of the sup 1 sup 0 sup 4 sup m Rh-> sup 1 sup 0 sup 4 Rh fractional decay factor F sub 2 (=0.9987). The experimental determinations...

  16. Complexes of Cd sup 2 sup +, U(O sub 2 ) sup 2 sup + and Th sup 4 sup + at radiotracer levels with phosphoric acid

    International Nuclear Information System (INIS)

    Bouhlassa, S.; El-Yahyaoui, A.; Brillard, L.; Hussonnois, M.; Guillaumont, R.

    1994-01-01

    In this work, we have turn to account the radiochemical techniques in order to investigate the complexation of Cd sup 2 sup +, U(O sub 2) sup 2 sup + and Th sup 2 sup +, at strength Mu=0,2, in various phosphoric media characterized by C sub ( H sub 3 P O sub 4) <= 4 M and 0.7 <= pH <= 4. The method chosen for this purpose is the liquid-liquid extraction of radioisotopes at tracer scale, with di(2-ethyl hexyl) phosphoric acid dissolved in benzene. The radionuclides used are Cd-109, U-233, U-230 and Th-227. Their distribution between the two phases are established by alpha or gamma spectrometric analysis. The analysis of the distribution data allows to define, in addition of species extracted in organic phase, the nature of phosphoric complexes which take place in aqueous media. Stability constants of these complexes and associated thermodynamic data are determined. 2 tabs.; 2 refs. (author)

  17. A 5 MV Pelletron accelerator providing {sup 1}H{sup +}, {sup 4}He{sup +}, and {sup 12}C{sup +} beams for underground nuclear astrophysics

    Energy Technology Data Exchange (ETDEWEB)

    Reinicke, Stefan; Cowan, Thomas E.; Grieger, Marcel; Ludwig, Felix; Rath, Ferdinand; Roeder, Marko; Takacs, Marcell P.; Wagner, Louis [Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden (Germany); Technische Universitaet Dresden (Germany); Bemmerer, Daniel; Junghans, Arnd R.; Mueller, Stefan E.; Rimarzig, Bernd; Schwengner, Ronald; Szuecs, Tamas; Wagner, Andreas [Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden (Germany); Reinhardt, Tobias P.; Zuber, Kai [Technische Universitaet Dresden (Germany)

    2016-07-01

    Accelerator-based experiments at the 0.4 MV LUNA underground accelerator at Gran Sasso have enabled great progress for studies of Big Bang and solar fusion reactions. However, to complete the picture of solar fusion reactions and open up helium and carbon burning reactions to study, higher beam energies are required. A 5 MV Pelletron accelerator will be installed in the Felsenkeller underground laboratory in Dresden. It will allow both, tandem mode operations for {sup 12}C{sup +} beams and the use of a radio frequency ion source on the high voltage terminal for {sup 1}H{sup +} and {sup 4}He{sup +} beams. The beam from the RF ion source is fed in with a remotely controlled electrostatic deflector. In addition, a large, ultra-sensitive high-purity germanium detector for offline measurements will be installed at Felsenkeller. The final timeline of the project will be shown, as well as the science case for in-house research and the capabilities available to external scientific users.

  18. Unique heavy lepton signature at e{sup +}e{sup -} linear collider with polarized beams

    Energy Technology Data Exchange (ETDEWEB)

    Moortgat-Pick, G. [Hamburg Univ. (Germany). 2. Inst. fuer Theoretische Physik; Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Osland, P. [Univ. Bergen (Norway). Dept. of Physics and Technology; Pankov, A.A.; Tsytrinov, A.V. [Technical Univ. Gomel (Belarus). Abdus Salam ICTP Affliated Centre

    2013-03-15

    We explore the effects of neutrino and electron mixing with exotic heavy leptons in the process e{sup +}e{sup -}{yields}W{sup +}W{sup -} within E{sub 6} models. We examine the possibility of uniquely distinguishing and identifying such effects of heavy neutral lepton exchange from Z-Z' mixing within the same class of models and also from analogous ones due to competitor models with anomalous trilinear gauge couplings (AGC) that can lead to very similar experimental signatures at the e{sup +}e{sup -} International Linear Collider (ILC) for {radical}(s)=350, 500 GeV and 1 TeV. Such clear identification of the model is possible by using a certain double polarization asymmetry. The availability of both beams being polarized plays a crucial role in identifying such exotic-lepton admixture. In addition, the sensitivity of the ILC for probing exotic-lepton admixture is substantially enhanced when the polarization of the produced W{sup {+-}} bosons is considered.

  19. Bio-Carbon Accounting for Bio-Oil Co-Processing: <sup>14sup>C and <sup>13sup>C/>12sup>C

    Energy Technology Data Exchange (ETDEWEB)

    Mora, Claudia I. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Li, Zhenghua [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Vance, Zachary [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-06-21

    This is a powerpoint presentation on bio-carbon accounting for bio-oil co-processing. Because of the overlapping range in the stable C isotope compositions of fossil oils and biooils from C3-type feedstocks, it is widely thought that stable isotopes are not useful to track renewable carbon during co-production. In contrast, our study demonstrates the utility of stable isotopes to: • capture a record of renewable carbon allocation between FCC products of co-processing • record changes in carbon apportionments due to changes in reactor or feed temperature Stable isotope trends as a function of percent bio-oil in the feed are more pronounced when the δ<sup>13sup>C of the bio-oil endmember differs greatly from the VGO (i.e., it has a C4 biomass source–corn stover, switch grass, Miscanthus, sugarcane– versus a C3 biomass source– pine, wheat, rice, potato), but trends on the latter case are significant for endmember differences of just a few permil. The correlation between measured <sup>14sup>C and δ<sup>13sup>C may be useful as an alternative to carbon accounting, but the relationship must first be established for different bio-oil sources.

  20. New greenish-yellow and yellowish-green emitting glass phosphors: Tb{sup 3+}/Eu{sup 3+} and Ce{sup 3+}/Tb{sup 3+}/Eu{sup 3+} in zinc phosphate glasses

    Energy Technology Data Exchange (ETDEWEB)

    Caldino, U., E-mail: cald@xanum.uam.mx [Departamento de Fisica, Universidad Autonoma Metropolitana-Iztapalapa, P.O. Box 55-534, 09340 Mexico D.F. (Mexico); Alvarez, E. [Departamento de Fisica, Universidad de Sonora (UNISON), Boulevard Luis Encinas y Rosales s/n, Hermosillo, Sonora 83000, Mexico (Mexico); Speghini, A. [Dipartimento di Biotecnologie, Universita di Verona, and INSTM, UdR Verona, Strada Le Grazie 15, I-37314 Verona (Italy); IFAC CNR, Nello Carrara Institute of Applied Physics, MDF Lab, I-50019 Sesto Fiorentino, FI (Italy); Bettinelli, M. [Dipartimento di Biotecnologie, Universita di Verona, and INSTM, UdR Verona, Strada Le Grazie 15, I-37314 Verona (Italy)

    2013-03-15

    A spectroscopic investigation of zinc phosphate glasses activated with Eu{sup 3+}, Tb{sup 3+}/Eu{sup 3+} and Ce{sup 3+}/Tb{sup 3+}/Eu{sup 3+} ions is performed through photoluminescence spectra and decay time measurements. Greenish-yellow light emission, with x=0.42 and y=0.50 CIE1931 chromaticity coordinates, is obtained in the 5.0% Tb(PO{sub 3}){sub 3}-2.0% Eu(PO{sub 3}){sub 3} codoped zinc phosphate glass upon Tb{sup 3+} excitation at 340 nm. Such greenish-yellow luminescence is generated mainly by the {sup 5}D{sub 4}{yields}{sup 7}F{sub 6,5} and {sup 5}D{sub 0}{yields}{sup 7}F{sub 1,2} emissions of Tb{sup 3+} and Eu{sup 3+}, respectively, europium being sensitized by terbium through a non-radiative energy transfer. By codoping with 0.1 Ce(PO{sub 3}){sub 3} in addition to Tb{sup 3+}/Eu{sup 3+} yellowish-green light emission with CIE1931 chromaticity coordinates, x=0.33 and y=0.48, is achieved through non-radiative energy transfer from Ce{sup 3+} to Tb{sup 3+} and from Ce{sup 3+} via Tb{sup 3+} to Eu{sup 3+} upon 280 nm excitation (peak emission wavelength of AlGaN-based LEDs). - Highlights: Black-Right-Pointing-Pointer Zn(PO{sub 3}){sub 2} glasses are optically activated with Tb{sup 3+}/Eu{sup 3+} (ZPO5Tb2Eu) and Ce{sup 3+}/Eu{sup 3+}/Tb{sup 3+} (ZPOCe5Tb2Eu). Black-Right-Pointing-Pointer Non-radiative energy transfer Tb{sup 3+}{yields}Eu{sup 3+} takes place in ZPO5Tb2Eu. Black-Right-Pointing-Pointer Greenish-yellow light is generated by ZPO5Tb2Eu pumped with 340 nm-UV light. Black-Right-Pointing-Pointer Non-radiative energy transfer Ce{sup 3+}{yields}Tb{sup 3+} and Ce{sup 3+}{yields}Eu{sup 3+} via Tb{sup 3+} takes place in ZPOCe5Tb2Eu. Black-Right-Pointing-Pointer Yellowish-green light is generated by ZPOCe5Tb2Eu pumped with 280 nm-UV light (AlGaN-LEDs).

  1. Predictions for Ξ{sub b}{sup -} → π{sup -}(D{sub s}{sup -}) Ξ{sub c}{sup 0}(2790) (Ξ{sub c}{sup 0}(2815)) and Ξ{sub b}{sup -} → anti ν{sub l}l Ξ{sub c}{sup 0}(2790) (Ξ{sub c}{sup 0}(2815))

    Energy Technology Data Exchange (ETDEWEB)

    Pavao, R.P.; Nieves, J. [Centro Mixto CSIC-Universidad de Valencia, Instituto de Fisica Corpuscular (IFIC), Institutos de Investigacion de Paterna, Valencia (Spain); Liang, Wei-Hong [Guangxi Normal University, Department of Physics, Guilin (China); Oset, E. [Centro Mixto Universidad de Valencia-CSIC, Departamento de Fisica Teorica y IFIC, Institutos de Investigacion de Paterna, Valencia (Spain)

    2017-04-15

    We have performed calculations for the nonleptonic Ξ{sub b}{sup -} → π{sup -} Ξ{sub c}{sup 0}(2790) (J = (1)/(2)) and Ξ{sub b}{sup -} → π{sup -} Ξ{sub c}{sup 0}(2815) (J = (3)/(2)) decays and the same reactions replacing the π{sup -} by a D{sub s}{sup -}. At the same time we have also evaluated the semileptonic rates for Ξ{sub b}{sup -} → anti ν{sub l}l Ξ{sub c}{sup 0}(2790) and Ξ{sub b}{sup -} → anti ν{sub l}l Ξ{sub c}{sup 0}(2815). We look at the reactions from the perspective that the Ξ{sub c}{sup 0}(2790) and Ξ{sub c}{sup 0}(2815) resonances are dynamically generated from the pseudoscalar-baryon and vector-baryon interactions. We evaluate ratios of the rates of these reactions and make predictions that can be tested in future experiments. We also find that the results are rather sensitive to the coupling of the Ξ{sub c}{sup *} resonances to the D{sup *}Σ and D{sup *}Λ components. (orig.)

  2. Investigations on the indium-113m isotope generators

    International Nuclear Information System (INIS)

    Oniciu, L.; Veglia, A.

    1975-01-01

    Methods for the determination of sup(113Sn) in the eluate of an sup(113m)In generator are proposed. The techniques for the chemical and radionuclidic purity analysis of the eluate are also described: colorimetry, gamma-ray spectrometry, thin-film chromatography, and electrophoretic separation were used. Two generators of different origins were studied. The presence of the isotopes sup(113)Sn, sup(125)Sb, sup(125m)Te, and the elements Zr, Si and Fe were detected in the eluate. Recommendations for the use of these isotope cows are made. (G.Gy.)

  3. Down- and up-conversion emissions in Er{sup 3+}–Yb{sup 3+} codoped TeO{sub 2}–ZnO–ZnF{sub 2} glasses

    Energy Technology Data Exchange (ETDEWEB)

    Miguel, A. [Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU, Alda. Urquijo s/n, 48013 Bilbao (Spain); Arriandiaga, M.A. [Departamento de Física Aplicada II, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, Apartado 644, Bilbao (Spain); Morea, R. [Instituto de Optica, Consejo Superior de Investigaciones Científicas CSIC, Serrano 121, 28006 Madrid (Spain); Fernandez, J. [Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU, Alda. Urquijo s/n, 48013 Bilbao (Spain); Materials Physics Center CSIC-UPV/EHU and Donostia International Physics Center, 20018 San Sebastian (Spain); Gonzalo, J. [Instituto de Optica, Consejo Superior de Investigaciones Científicas CSIC, Serrano 121, 28006 Madrid (Spain); Balda, R., E-mail: wupbacrr@bi.ehu.es [Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU, Alda. Urquijo s/n, 48013 Bilbao (Spain); Materials Physics Center CSIC-UPV/EHU and Donostia International Physics Center, 20018 San Sebastian (Spain)

    2015-02-15

    In this work, we report the near infrared and upconversion emissions of Er{sup 3+}–Yb{sup 3+} codoped fluorotellurite TeO{sub 2}–ZnO–ZnF{sub 2} glasses for different YbF{sub 3} concentrations ranging between 0.5 and 2 wt%. The study includes absorption and emission spectra and lifetime measurements for the infrared and visible fluorescence. The energy transfer between Yb{sup 3+} and Er{sup 3+} ions is confirmed by the temporal behavior of the near-infrared luminescence of Yb{sup 3+} ions as well as by the enhancement of the 1532 nm emission of Er{sup 3+} ions in the codoped samples. The Yb{sup 3+}→Er{sup 3+} energy transfer efficiency is calculated from the Yb{sup 3+} lifetimes in single and codoped samples. Back transfer from Er{sup 3+} to Yb{sup 3+} ions is present under near infrared and visible excitation of Er{sup 3+} ions at 798 and 488 nm respectively. An enhancement of the visible upconversion fluorescence is also observed in the codoped samples due to energy transfer from Yb{sup 3+} to Er{sup 3+} ions. The standardized value for the efficiency of the green upconversion emission is 1.06×10{sup −4} for the codoped sample with 2 wt% of YbF{sub 3} which is comparable to that reported in lead–zinc–tellurite glasses. The possible upconversion processes and mechanisms leading to the population of several excited levels are discussed. - Highlights: • The effect of Yb{sup 3+} concentration on the NIR and VIS emissions of Er{sup 3+}ions is studied. • TheYb{sup 3+}↔Er{sup 3+} energy transfer in fluorotellurite glasses is demonstrated. • Increase of the green upconversion emission with Yb{sup 3+} concentration due to Yb{sup 3+}→Er{sup 3+} energy transfer. • The ratio of red to green upconversion emissions depends on the concentration of Yb{sup 3+} ions.

  4. Raman spectra of Cu{sub 2}B{sup II}C{sup IV}X{sub 4}{sup VI} magnetic quaternary semiconductor compounds with tetragonal stannite type structure

    Energy Technology Data Exchange (ETDEWEB)

    Rincón, C., E-mail: crincon@ula.ve; Quintero, M.; Power, Ch.; Moreno, E.; Quintero, E.; Morocoima, M. [Centro de Estudios de Semiconductores, Departamento de Física, Facultad de Ciencias, Universidad de Los Andes, Mérida (Venezuela, Bolivarian Republic of); Henao, J. A.; Macías, M. A. [Grupo de Investigación en Química Estructural, Facultad de Ciencias, Escuela de Química, Universidad Industrial de Santander, Apartado Aéreo 678, Bucaramanga (Colombia)

    2015-05-28

    A comparative study of the Raman spectra of Cu{sub 2}B{sup II}C{sup IV}S{sub 4}{sup VI} and Cu{sub 2}B{sup II}C{sup IV}Se{sub 4}{sup VI}(where B = Mn or Fe) magnetic quaternary semiconductor compounds with stannite-type structure (I4{sup ¯}2m) has been done. Most of the fourteen Raman lines expected for these materials were observed in the spectra. The two strongest lines observed have been assigned to the IR inactive A{sub 1}{sup 1} and A{sub 1}{sup 2} stannite modes that originated from the motion of the S or Se anion around the Cu and C{sup IV} cations remaining at rest. The shift in the frequency of these two lines of about 150 cm{sup −1} to lower energies observed in Cu{sub 2}B{sup II}C{sup IV}Se{sub 4}{sup VI} compounds as compared to those in Cu{sub 2}B{sup II}C{sup IV}S{sub 4}{sup VI} ones, can then be explained as due to the anion mass effect. Based on the fact that values of these frequencies depend mainly on anion mass and bond-stretching forces between nearest-neighbor atoms, the vibrational frequencies v{sup ¯}(A{sub 1}{sup 2}) and v{sup ¯}(A{sub 1}{sup 2}) of both modes for several Cu{sub 2}B{sup II}C{sup IV}X{sub 4}{sup VI} stannite compounds (where X = S, Se, or Te) very close to the experimental data reported for these materials were calculated from a simple model that relates these stretching forces to the anion-cation bond-distances.

  5. Measurement of D{sup *{+-}} meson produciton in e{sup {+-}}p scattering at low Q{sup 2}

    Energy Technology Data Exchange (ETDEWEB)

    Chekanov, S.; Derrick, M.; Magill, S. [Argonne National Laboratory, Argonne, IL (US)] (and others)

    2007-02-15

    The production of D{sup *{+-}}(2010) mesons in e{sup {+-}}p scattering in the range of exchanged photon virtuality 0.05sup 2}<0.7 GeV{sup 2} has been measured with the ZEUS detector at HERA using an integrated luminosity of 82 pb{sup -1}. The decay channels D{sup *+}{yields}D{sup 0}{pi}{sup +} with D{sup 0}{yields}K{sup -}{pi}{sup +} and corresponding antiparticle decay were used to identify D{sup *} mesons and the ZEUS beampipe calorimeter was used to identify the scattered electron. Differential D{sup *} cross sections as functions of Q{sup 2}, inelasticity, y, transverse momentum of the D{sup *} meson, p{sub T}(D{sup *}), and pseudorapidity of the D{sup *} meson, {eta}(D{sup *}), have been measured in the kinematic region 0.02sup *})<9.0 GeV and vertical stroke {eta}(D{sup *}) vertical stroke <1.5. The measured differential cross sections are in agreement with two different NLO QCD calculations. The cross sections are also compared to previous ZEUS measurements in the photoproduction and DIS regimes. (orig.)

  6. Investigations of low- and high-spin states of sup 1 sup 3 sup 2 La

    CERN Document Server

    Kumar, V; Singh, R P; Muralithar, S; Bhowmik, R K

    2003-01-01

    The fusion evaporation reaction sup 1 sup 2 sup 2 Sn( sup 1 sup 4 N,4n) sup 1 sup 3 sup 2 La was used to populate the high-spin states of sup 1 sup 3 sup 2 La at the beam energy of 60 MeV. A new band consisting of mostly E2 transitions has been discovered. This band has the interesting links to the ground state 2 sup - and the isomeric state 6 sup -. A new transition of energy 351 keV connecting the low-spin states of the positive-parity band based on the pi h sub 1 sub 1 sub / sub 2 x nu h sub 1 sub 1 sub / sub 2 particle configuration, has been found. This has played a very important role in resolving the existing ambiguities and inconsistencies in the spin assignment of the band head. (orig.)

  7. Physics at the e{sup +}e{sup -} linear collider

    Energy Technology Data Exchange (ETDEWEB)

    Moortgat-Pick, G., E-mail: gudrid.moortgat-pick@desy.de [II. Institute of Theoretical Physics, University of Hamburg, 22761, Hamburg (Germany); Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, 22603, Hamburg (Germany); Baer, H. [Department of Physics and Astronomy, University of Oklahoma, 73019, Norman, OK (United States); Battaglia, M. [Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA (United States); Belanger, G. [Laboratoire de Physique Theorique (LAPTh), Université Savoie Mont Blanc, CNRS, B.P.110, 74941, Annecy-le-Vieux (France); Fujii, K. [High Energy Accelerator Research Organisation (KEK), Tsukuba (Japan); and others

    2015-08-14

    A comprehensive review of physics at an e{sup +}e{sup -} linear collider in the energy range of √s=92 GeV–3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well.

  8. Physics at the e{sup +}e{sup -} Linear Collider

    Energy Technology Data Exchange (ETDEWEB)

    Moortgat-Pick, G. [Hamburg Univ. (Germany). 2. Inst. fuer Theoretische Physik; DESY Hamburg (Germany); Baer, H. [Oklahoma Univ., Norman, OK (United States). Dept. of Physics and Astronomy; Battaglia, M. [California Santa Cruz Univ., CA (United States). Santa Cruz Institute for Particle Physics; and others

    2015-04-15

    A comprehensive review of physics at an e{sup +}e{sup -} Linear Collider in the energy range of √(s)=92 GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low energy as well as astroparticle physics.The report focuses in particular on Higgs boson, Top quark and electroweak precision physics, but also discusses several models of beyond the Standard Model physics such as Supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analyzed as well.

  9. Physics at the e{sup +}e{sup -} linear collider

    Energy Technology Data Exchange (ETDEWEB)

    Moortgat-Pick, G.; Liebler, S. [University of Hamburg, II. Institute of Theoretical Physics, Hamburg (Germany); Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, Hamburg (Germany); Baer, H. [University of Oklahoma, Department of Physics and Astronomy, Norman, OK (United States); Battaglia, M.; Stefaniak, T. [University of California Santa Cruz, Santa Cruz Institute for Particle Physics, Santa Cruz, CA (United States); Belanger, G.; Serpico, P. [Universite Savoie Mont Blanc, CNRS, Laboratoire de Physique Theorique (LAPTh), B.P.110, Annecy-le-Vieux (France); Fujii, K. [High Energy Accelerator Research Organisation (KEK), Tsukuba (Japan); Kalinowski, J.; Krawczyk, M. [University of Warsaw, Faculty of Physics, Warsaw (Poland); Heinemeyer, S. [Instituto de Fisica de Cantabria (CSIC-UC), Santander (Spain); Kiyo, Y. [Juntendo University, Department of Physics, Inzai, Chiba (Japan); Olive, K. [University of Minnesota, William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, Minneapolis, MN (United States); Simon, F. [Max-Planck-Institut fuer Physik, Munich (Germany); Uwer, P. [Humboldt-Universitaet zu Berlin, Institut fuer Physik, Berlin (Germany); Wackeroth, D. [SUNY at Buffalo, Department of Physics, Buffalo, NY (United States); Zerwas, P.M.; List, J.; Mnich, J.; Moenig, K.; Stanitzki, M.; Weiglein, G.; Mnich, J. [Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, Hamburg (Germany); Arbey, A.; Mahmoudi, F. [Universite de Lyon, Villeurbonne Cedex (France); Centre de Recherche Astrophysique de Lyon, CNRS, UMR 5574, Saint-Genis Laval Cedex (France); Ecole Normale Superieure de Lyon, Lyon (France); Asano, M. [Universitaet Bonn, Physikalisches Institut and Bethe Center for Theoretical Physics, Bonn (Germany); Bagger, J.; Bagger, J. [Johns Hopkins University, Department of Physics and Astronomy, Baltimore, MD (United States); TRIUMF, Vancouver, BC (Canada); Bechtle, P.; Desch, K.; Kroseberg, J. [University of Bonn, Physikalisches Institut, Bonn (Germany); Bharucha, A. [Technische Universitaet Muenchen, Physik Department T31, Garching (Germany); CNRS, Aix Marseille U., U. de Toulon, CPT, Marseille (France); Brau, J.; Brau, J. [University of Oregon, Department of Physics, Eugene, OR (United States); Bruemmer, F. [LUPM, UMR 5299, Universite de Montpellier II et CNRS, Montpellier (France); Choi, S.Y. [Chonbuk National University, Department of Physics, Jeonju (Korea, Republic of); Denner, A.; Porod, W. [Universitaet Wuerzburg, Institut fuer Theoretische Physik und Astrophysik, Wuerzburg (Germany); Dittmaier, S. [Albert-Ludwigs-Universitaet Freiburg, Physikalisches Institut, Freiburg (Germany); Ellwanger, U.; Mambrini, Y. [Universite de Paris-Sud, Laboratoire de Physique, UMR 8627, CNRS, Orsay (France); Englert, C. [University of Glasgow, SUPA, School of Physics and Astronomy, Glasgow (United Kingdom); Freitas, A. [University of Pittsburgh, PITT PACC, Department of Physics and Astronomy, Pittsburgh, PA (United States); Ginzburg, I. [Sobolev Institute of Mathematics and Novosibirsk State University, Novosibirsk (Russian Federation); Godfrey, S. [Carleton University, Ottawa-Carleton Institute for Physics, Department of Physics, Ottawa (Canada); Greiner, N. [Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, Hamburg (Germany); Max-Planck-Institut fuer Physik, Munich (Germany); Grojean, C. [ICREA at IFAE, Universitat Autonoma de Barcelona, Bellaterra (Spain); Gruenewald, M. [University College Dublin, Dublin (Ireland); Heisig, J. [RWTH Aachen University, Institute for Theoretical Particle Physics and Cosmology, Aachen (Germany); Hoecker, A.; Moortgat, F.; Schlatter, D. [CERN, Geneva (Switzerland); Kanemura, S. [University of Toyama, Department of Physics, Toyama (Japan); Kawagoe, K.; Kawagoe, K. [Kyushu University, Department of Physics, Fukuoka (Japan); Kogler, R. [University of Hamburg, Hamburg (Germany); Kronfeld, A.S.; Kronfeld, A.S. [Fermi National Accelerator Laboratory, Theoretical Physics Department, Batavia, IL (United States); Technische Universitaet Muenchen, Institute for Advanced Study, Garching (Germany); Matsumoto, S. [The University of Tokyo, Kavli IPMU (WPI), Kashiwa, Chiba (Japan); Muehlleitner, M.M. [Karlsruhe Institute of Technology, Institute for Theoretical Physics, Karlsruhe (Germany); Poeschl, R. [Laboratoire de L' accelerateur Lineaire (LAL), CNRS/IN2P3, Orsay (FR); Porto, S. [University of Hamburg, II. Institute of Theoretical Physics, Hamburg (DE); Rolbiecki, K. [University of Warsaw, Faculty of Physics, Warsaw (PL); Universidad Autonoma de Madrid, Instituto de Fisica Teorica, IFT-UAM/CSIC, Madrid (ES); Schmitt, M. [Northwestern University, Department of Physics and Astronomy, Evanston, IL (US); Staal, O. [Stockholm University, The Oskar Klein Centre, Department of Physics, Stockholm (SE); Stoeckinger, D. [Institut fuer Kern- und Teilchenphysik, TU Dresden, Dresden (DE); Wilson, G.W. [University of Kansas, Department of Physics and Astronomy, Lawrence, KS (US); Zeune, L. [ITFA, University of Amsterdam, Amsterdam (NL); Xella, S. [University of Copenhagen, Niels Bohr Institute, Kobenhavn (DK); Ellis, J. [CERN, Geneva (CH); King' s College London, Theoretical Particle Physics and Cosmology Group, Department of Physics, Strand, London (GB); Komamiya, S. [The University of Tokyo, Department of Physics, Graduate School of Science, and International Center for Elementary Particle Physics, Tokyo (JP); Peskin, M. [SLAC, Stanford University, CA (US); Wagner, A. [Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, Hamburg (DE); University of Hamburg, Hamburg (DE); Yamamoto, H. [Tohoku University, Department of Physics, Sendai, Miyagi (JP)

    2015-08-15

    A comprehensive review of physics at an e{sup +}e{sup -} linear collider in the energy range of √(s) = 92 GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well. (orig.)

  10. Precision measurement of the ratio BR(K{sub S{yields}{pi}}{sup +{pi}-}e{sup +}e{sup -})/BR(K{sub L{yields}{pi}}{sup +{pi}-{pi}}{sub D}{sup 0})

    Energy Technology Data Exchange (ETDEWEB)

    Batley, J.R. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Kalmus, G.E. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Lazzeroni, C. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT (United Kingdom); Munday, D.J. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Patel, M. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Imperial College London, Blackett Laboratory, Physics Department, Prince Consort Road, London SW7 2AZ (United Kingdom); Slater, M.W. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT (United Kingdom); Wotton, S.A. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Arcidiacono, R. [CERN, CH-1211 Geneve 23 (Switzerland); Sezione dell' INFN di Torino, I-10125 Torino (Italy); Dipartimento di Fisica Sperimentale dell' Universita, I-10125 Torino (Italy); Bocquet, G.; Ceccucci, A. [CERN, CH-1211 Geneve 23 (Switzerland); Cundy, D. [CERN, CH-1211 Geneve 23 (Switzerland); Istituto di Cosmogeofisica del CNR di Torino, I-10133 Torino (Italy); Doble, N. [CERN, CH-1211 Geneve 23 (Switzerland); Sezione dell' INFN di Pisa, I-56100 Pisa (Italy); Dipartimento di Fisica dell' Universita, I-56100 Pisa (Italy); Falaleev, V.; Gatignon, L.; Gonidec, A.; Grafstroem, P.; Kubischta, W. [CERN, CH-1211 Geneve 23 (Switzerland); Marchetto, F. [CERN, CH-1211 Geneve 23 (Switzerland); Sezione dell' INFN di Torino, I-10125 Torino (Italy); Mikulec, I. [CERN, CH-1211 Geneve 23 (Switzerland); Osterreichische Akademie der Wissenschaften, Institut fuer Hochenergiephysik, A-10560 Wien (Austria)

    2011-01-03

    The K{sub S{yields}{pi}}{sup +{pi}-}e{sup +}e{sup -} decay mode was investigated using the data collected in 2002 by the NA48/1 Collaboration. With about 23 k K{sub S{yields}{pi}}{sup +{pi}-}e{sup +}e{sup -} events and 59 k K{sub L{yields}{pi}}{sup +{pi}-{pi}}{sub D}{sup 0} normalization decays, the K{sub S{yields}{pi}}{sup +{pi}-}e{sup +}e{sup -} branching ratio relative to the K{sub L{yields}{pi}}{sup +{pi}-{pi}}{sub D}{sup 0} one was determined to be BR(K{sub S{yields}{pi}}{sup +{pi}-}e{sup +}e{sup -})/BR(K{sub L{yields}{pi}}{sup +{pi}-{pi}}{sub D}{sup 0})=(3.28{+-}0.06{sub stat{+-}}0.04{sub syst})x10{sup -2}. This result was used to set the upper limit |g{sub E1}/g{sub BR}|<3.0 at 90% CL on the presence, in the decay amplitude, of an E1 direct emission (g{sub E1}) term relative to the dominant inner bremsstrahlung (g{sub BR}) term. The CP-violating asymmetry A{sub {phi}} in the sin{phi}cos{phi} distribution of K{sub S{yields}{pi}}{sup +{pi}-}e{sup +}e{sup -} events, where {phi} is the angle between the {pi}{sup +{pi}-} and the e{sup +}e{sup -} decay planes in the kaon centre of mass, was found to be A{sub {phi}=}(-0.4{+-}0.8)%, consistent with zero. These results are in good agreement with a description of the K{sub S{yields}{pi}}{sup +{pi}-}e{sup +}e{sup -} decay amplitude dominated by the CP-even inner bremsstrahlung process.

  11. Measurement of the CKM angle gamma of the unitarity triangle of the CKM matrix in B{sup {+-}} {yields} D{sup *}K{sup {+-}} decays at the BaBar experiment; Mesure de l'angle gamma du triangle d'unitarite de la matrice CKM dans les desintegrations B{sup {+-}} {yields} D{sup *}K{sup {+-}} aupres de l'experience BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Latour, E

    2007-10-15

    This thesis applies the Gronau-London-Wyler (GLW) method to the B{sup {+-}} {yields} D{sup *}K{sup {+-}} decays in view of measuring the angle {gamma} of the unitarity triangle of the CKM matrix at the Babar experiment. After a review of CP violation, we describe the different paths used so far for measuring {gamma}, with a special emphasis on the GLW method. Then the analysis is presented. It relies on an optimized selection for maximizing signal sensitivity, and on an extended maximum likelihood fit from which we extract the four GLW observables A{sup *}(CP+), R{sup *}(CP+), A{sup *}(CP-) and R{sup *}(CP-). Results obtained using Run 1 to 5 of Babar, corresponding to 347 fb{sup -1}, i.e. 381*10{sup 6} BB-bar pairs, give A{sup *}(CP+) equals -0.114{+-}0.089{+-}0.007; R{sup *}(CP+) equals 1.313{+-}0.132{+-}0.029; A{sup *}(CP-) equals 0.060{+-}0.099{+-}0.016 and R{sup *}(CP-) equals 1.081{+-}0.119{+-}0.034. Translated into cartesian coordinates x{sub {+-}}{sup *} for comparing with Dalitz analysis, we get x{sub +}{sup *} equals 0,112{+-}0,061{+-}0,012; x{sub -}{sup *} equals 0,004{+-}0,059{+-}0,012. All these results are in agreement with previous measurements from Babar and Belle experiments. Precision is improved by a factor two on CP even observables and a factor three for CP odd observables, in particular due to the use of D{sup *} {yields} D{sup 0}{gamma} decays, and is better on x{sub {+-}}{sup *} than the world average of Babar and Belle Dalitz measurements. The statistics used is too small for providing a precise enough r{sub B}{sup *} with R{sup *}(CP{+-}) that could constrain {gamma}. However the combination of our results with Dalitz measurements will improve this constraint. (author)

  12. New physics effects in charm meson decays involving c → ul{sup +}l{sup -}(l{sub i}{sup -+}l{sub j}{sup ±}) transitions

    Energy Technology Data Exchange (ETDEWEB)

    Sahoo, Suchismita; Mohanta, Rukmani [University of Hyderabad, School of Physics, Hyderabad (India)

    2017-05-15

    We study the effect of the scalar leptoquark and Z{sup '} boson on the rare decays of the D mesons involving flavour changing transitions c → ul{sup +}l{sup -}(l{sub i}{sup -+}l{sub j}{sup ±}). We constrain the new physics parameter space using the branching ratio of the rare decay mode D{sup 0} → μ{sup +}μ{sup -} and the D{sup 0} - anti D{sup 0} oscillation data. We compute the branching ratios, forward-backward asymmetry parameters and flat terms in D{sup +(0)} → π{sup +(0)} μ{sup +}μ{sup -} processes using the constrained parameters. The branching ratios of the lepton flavour violating D meson decays, such as D{sup 0} → μe, τe and D{sup +(0)} → π{sup +(0)} μ{sup -}e{sup +} are also investigated. (orig.)

  13. Measurement of the Branching Fraction for the Decay B{sup 0}-->D{sup *+}D{sup *-}

    Energy Technology Data Exchange (ETDEWEB)

    Roberts, Doug

    2001-07-30

    Decays of the type B {yields} D{sup (*)} {bar D}(*) can be used to provide a measurement of the parameter sin2{beta} of the Unitarity Triangle that is complementary to the measurement derived from the mode B{sup 0} {yields}/K{sub S}{sup 0}. In this document we report a measurement of the branching fraction for the decay B{sup 0} {yields} D*{sup +}D*{sup -} with the BABAR detector. With data corresponding to an integrated luminosity of 20.7 fb{sup -1} collected at the {Upsilon}(4S) resonance during 1999-2000, we have reconstructed 38 candidate signal events in the mode B{sup 0} {yields} D*{sup +}D*{sup -} with an estimated background of 6.2 {+-} 0.5 events. From these events, we determine the branching fraction to be {Beta}(B{sup 0} {yields} D*{sup +}D*{sup -}) = (8.0 {+-} 1.6(stat) {+-} 1.2(syst)) x 10{sup -4} (preliminary). The measured fraction of the component with odd CP parity is 0.27{+-} 0.17(stat) {+-} 0.02(syst).

  14. Mobility and lifetime of sup 2 sup 0 sup 8 Tl ions in liquid xenon

    CERN Document Server

    Walters, A J

    2003-01-01

    Positively charged sup 2 sup 0 sup 8 Tl ions are transported through liquid xenon using electric fields in the range of 4-10 kV cm sup - sup 1 and for drift distances up to 50 mm. From these measurements we deduce upper limits on the attenuation length for Tl ions in liquid xenon, resulting in a lifetime >5.5 s. In addition to these results, the field independent mobility of Tl bearing species in liquid xenon was measured to be 1.33+-0.04x10 sup - sup 4 cm sup 2 V sup - sup 1 s sup - sup 1. This result, when coupled with those for other species by previous workers, suggests that positive ion mobility in liquid xenon is proportional to the hard-core radius. Applications to Ba ion collection in a double beta decay experiment are also discussed.

  15. An ALMA Survey of DCN/H{sup 13}CN and DCO{sup +}/H{sup 13}CO{sup +} in Protoplanetary Disks

    Energy Technology Data Exchange (ETDEWEB)

    Huang, Jane; Öberg, Karin I.; Qi, Chunhua; Andrews, Sean M.; Guzmán, Viviana V.; Loomis, Ryan A.; Wilner, David J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Aikawa, Yuri; Furuya, Kenji [Center for Computational Sciences, The University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8577 (Japan); Van Dishoeck, Ewine F., E-mail: jane.huang@cfa.harvard.edu [Leiden Observatory, Leiden University, P.O. Box 9513, NL-2300 RA Leiden (Netherlands)

    2017-02-01

    The deuterium enrichment of molecules is sensitive to their formation environment. Constraining patterns of deuterium chemistry in protoplanetary disks is therefore useful for probing how material is inherited or reprocessed throughout the stages of star and planet formation. We present ALMA observations at ∼0.″6 resolution of DCO{sup +}, H{sup 13}CO{sup +}, DCN, and H{sup 13}CN in the full disks around T Tauri stars AS 209 and IM Lup, in the transition disks around T Tauri stars V4046 Sgr and LkCa 15, and in the full disks around Herbig Ae stars MWC 480 and HD 163296. We also present ALMA observations of HCN in the IM Lup disk. DCN, DCO{sup +}, and H{sup 13}CO{sup +} are detected in all disks, and H{sup 13}CN in all but the IM Lup disk. We find efficient deuterium fractionation for the sample, with estimates of disk-averaged DCO{sup +}/HCO{sup +} and DCN/HCN abundance ratios ranging from ∼0.02–0.06 and ∼0.005–0.08, respectively, which is comparable to values reported for other interstellar environments. The relative distributions of DCN and DCO{sup +} vary between disks, suggesting that multiple formation pathways may be needed to explain the diverse emission morphologies. In addition, gaps and rings observed in both H{sup 13}CO{sup +} and DCO{sup +} emission provide new evidence that DCO{sup +} bears a complex relationship with the location of the midplane CO snowline.

  16. Calculated activities of some isotopes in the RA reactor highly enriched fuel significant for possible environmental contamination - Operational report; Radni izvestaj - Proracun aktivnosti nekih izotopa u visokoobogacenom uranskom gorivu reaktora RA, znacajnih sa gledista moguce kontaminacije okoline

    Energy Technology Data Exchange (ETDEWEB)

    Bulovic, V; Martinc, R; Cupac, S [Institute of Nuclear Sciences Boris Kidric, Vinca, Beograd (Serbia and Montenegro)

    1976-12-15

    This report contains calculation basis and obtained results of activities for three groups of isotopes in the RA reactor 80% enriched fuel element. The following isotopes are included: 1) {sup 85m}Kr, {sup 87}Kr, {sup 88}Kr, {sup 131}J, {sup 132}J, {sup 133}J, {sup 134}J, {sup 135}J, {sup 133}Xe, {sup 138}Xe i {sup 138}Cs, 2) {sup 89}Sr, {sup 90}Sr, {sup 91}Sr, {sup 92}Sr, {sup 95}Zr, {sup 97}Zr, {sup 103}Ru, {sup 105}Ru, {sup 106}Ru, {sup 129m}Te, {sup 134}Cs, {sup 137}Cs, {sup 140}Ba, {sup 144}Ce, kao i 3) {sup 238}Pu, {sup 239}Pu i {sup 240}Pu. It was estimated that the fuel is exposed to mean neutron flux. The periodicity of reactor operation is taken into account. Calculation results are given dependent on the time of exposure. These results are to be used as source data for Ra reactor safety analyses. [Serbo-Croat] Izlozene su osnove i prikazani su rezultati izvedenog proracuna aktivnosti tri grupe izotopa u gorivnom elementu reaktora RA sa 80% obogacenim uranom - 235. Obuhvaceni su: 1) {sup 85m}Kr, {sup 87}Kr, {sup 88}Kr, {sup 131}J, {sup 132}J, {sup 133}J, {sup 134}J, {sup 135}J, {sup 133}Xe, {sup 138}Xe i {sup 138}Cs, zatim, 2) {sup 89}Sr, {sup 90}Sr, {sup 91}Sr, {sup 92}Sr, {sup 95}Zr, {sup 97}Zr, {sup 103}Ru, {sup 105}Ru, {sup 106}Ru, {sup 129m}Te, {sup 134}Cs, {sup 137}Cs, {sup 140}Ba, {sup 144}Ce, kao i 3) {sup 238}Pu, {sup 239}Pu i {sup 240}Pu. Pretpostavljeno je da se gorivo ozracuje na srednjem fluksu neutrona, a periodicnost rada reaktora je uvazavana. Rezultati proracuna, dati u numerickom obliku, sistematizovani su kao funkcija toka vremena ozracivanja goriva. Ovi rezultati bice korisceni kao izvorni podaci kod izrade sigurnosnih analiza za reaktor RA (author)

  17. {sigma}{sup t}ot{sub e}eyy at e{sup +}e{sup -} colliders

    Energy Technology Data Exchange (ETDEWEB)

    Godbole, R.M. [Indian Institute of Science, Centre for Theoretical Studies, Bangalore (India); Pancheri, G. [Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Rome (Italy)

    2001-02-01

    In this talk are briefly summarized different models for {sigma}{sup t}ot{sub 2}y (e{sup +}e{sup -} {yields}yy{yields} hadrons) and contrast model predictions with the data. It will be then discussed the capability of the future e{sup +}e{sup -} and yy colliders to distinguish between various models and end with an outlook for future work.

  18. First observation of the Charmless Decay B to K π<sup>0sup>π>0sup> and Study of its Dalitz Plot Structure

    Energy Technology Data Exchange (ETDEWEB)

    Puccio, Eugenia Maria Teresa Irene [Univ. of Warwick, Coventry (United Kingdom)

    2012-03-01

    Results for the first measurement of the inclusive branching and CP asymmetry of the charmless 3-body decay B<sup>+> → K<sup>+π>0sup>π>0sup> are presented. The analysis uses a data sample with an integrated luminosity of 429.0 fb<sup>-1sup>, recorded by the BABAR detector at the PEP-II asymmetric B Factory. This sample corresponds to 470.9 ±} 2.8 million B$\\bar{B}$ pairs. Measurements of the branching fractions (B) and CP asymmetries (ACP) of some of the intermediate resonances in the K<sup>+π>0sup>π>0sup> Dalitz plot are also presented.

  19. Preparation of neptunium and plutonium tracers in nuclear reactions of sup 2 sup 3 sup 6 U with (21-60)MeV sup 3 He ions

    CERN Document Server

    Aaltonen, J; Trzaska, V; Gromova, E A; Yakovlev, V A

    2001-01-01

    Preparation of sup 2 sup 3 sup 6 Pu, sup 2 sup 3 sup 7 Pu and sup 2 sup 3 sup 5 Np by reactions sup 2 sup 3 sup 6 U( sup 3 He, t beta sup -) sup 2 sup 3 sup 6 Pu, sup 2 sup 3 sup 6 U( sup 3 He, 2n) sup 2 sup 3 sup 7 Pu and sup 2 sup 3 sup 6 U( sup 3 He, p3n) sup 2 sup 3 sup 5 Np in sup 3 He ion beams, their energy 43 and 60 MeV, in the K-130 cyclotron at Yuvyaskyul University (Finland) was studied. Cross sections of the reactions were determined. Yield curves for thick targets were calculated. The results are discussed and compared with previously obtained data on other reactions giving rise to formation of the same products. Methods of radiochemical separation of the products and sample preparation for alpha- and gamma-spectrometry are described

  20. The Electric Form Factor of the Neutron at Q<sup>2sup> = 1.17 and 1.47(GeV/c)<sup>2sup> from the <sup>2sup>H (e, en)' H reaction.

    Energy Technology Data Exchange (ETDEWEB)

    Tireman, William [Kent State Univ., Kent, OH (United States)

    2003-12-01

    The Jefferson Laboratory E93-038 collaboration measured the ratio of the electric form factor to the magnetic form factor of the neutron, g = Gne/Gnm, via recoil polarimetry from the quasielastic <sup>2sup>H(e,en)1 H reaction at q<sup>2sup> = 0.45, 1.17 and 1.47 (GeV/c)<sup>2sup> in Hall C of the Thomas Jefferson National Accelerator Facility. A polarimeter designed specifically for E93-038 was used to measure the up-down scattering asymmetry from the transverse component of the recoil neutron's polarization vector, and a dipole magnet located in front of the polarimeter was used to precess the polarization vector in the scattering plane through an angle of x. Sequential measurements of the scattering asymmetry with the polarization vector precessed through angles χ = 0° and χ = ±90° for Q<sup>2sup> = 1.47 (GeV/c)<sup>2sup> were made during January 2001 and through angles χ = ±40° for Q<sup>2sup> = 1.17 (GeV/c)<sup>2sup> during April 2001 and will be reported on in this dissertation. This ratio method removes the need to know the analyzing power

  1. sup 4 sup 4 Ti atom counting for nuclear astrophysics

    CERN Document Server

    Hui, S K; Berkovits, D; Boaretto, E; Ghelberg, S; Hass, M; Hershkowitz, A; Navon, E

    2000-01-01

    The nuclide sup 4 sup 4 Ti (T sub 1 sub / sub 2 =59.2 yr) has recently become an important asset to nuclear astrophysics through the measurement of its cosmic radioactivity, yielding significant information on fresh sup 4 sup 4 Ti nucleosynthesis in supernovae. We propose to use AMS to determine the production rate of sup 4 sup 4 Ti by the main channel believed to be responsible for sup 4 sup 4 Ti astrophysical production, namely sup 4 sup 0 Ca(alpha,gamma). A preliminary experiment conducted at the Koffler 14UD Pelletron accelerator demonstrates a sensitivity of 1x10 sup - sup 1 sup 4 for the sup 4 sup 4 Ti/Ti ratio. The AMS detection was performed using sup 4 sup 4 Ti sup - ions sputtered from a TiO sub 2 sample, reducing considerably the sup 4 sup 4 Ca isobaric interference. The present limit corresponds effectively to sup 4 sup 4 Ti production with resonance strength in the range 10-100 meV for a one-day sup 4 sup 0 Ca(alpha,gamma) activation. Several such resonances are known to be responsible for sup 4 ...

  2. Measurement of the branching ratio of the decay Ξ{sup 0}→Σ{sup +}μ{sup −}ν{sup ¯}{sub μ}

    Energy Technology Data Exchange (ETDEWEB)

    Batley, J.R.; Kalmus, G.E. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Lazzeroni, C., E-mail: cristina.lazzeroni@cern.ch [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Munday, D.J.; Patel, M.; Slater, M.W.; Wotton, S.A. [Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom); Arcidiacono, R.; Bocquet, G.; Ceccucci, A.; Cundy, D.; Doble, N.; Falaleev, V.; Gatignon, L.; Gonidec, A.; Grafström, P.; Kubischta, W.; Marchetto, F.; Mikulec, I.; Norton, A. [CERN, CH-1211 Genève 23 (Switzerland); and others

    2013-03-13

    From the 2002 data taking with a neutral kaon beam extracted from the CERN-SPS, the NA48/1 experiment observed 97 Ξ{sup 0}→Σ{sup +}μ{sup −}ν{sup ¯}{sub μ} candidates with a background contamination of 30.8±4.2 events. From this sample, the BR(Ξ{sup 0}→Σ{sup +}μ{sup −}ν{sup ¯}{sub μ}) is measured to be (2.17±0.32{sub stat}±0.17{sub syst})×10{sup −6}.

  3. Production of {sup 186}Re and {sup 188}Re, and synthesis of {sup 188}Re-DTPA

    Energy Technology Data Exchange (ETDEWEB)

    Hashimoto, Kazuyuki; Motoishi, Shoji; Kobayashi, Katsutoshi; Izumo, Mishiroku [Department of Radioisotopes, Japan Atomic Energy Research Institute, Tokai, Ibaraki (Japan); Musdja, Muhammad Yanis

    1999-08-01

    Production of radioactive rhenium isotopes {sup 186}Re and {sup 188}Re, and synthesis of {sup 188}Re-DTPA have been studied. For {sup 186}Re, a production method by the {sup 185}Re(n, {gamma}) {sup 186}Re reaction in a reactor has been established. For {sup 188}Re, a production method by the double neuron capture reaction of {sup 186}W, which produces a {sup 188}W/{sup 188}Re generator, has been established. For synthesis of {sup 188}Re-DTPA, the optimum conditions, including pH, the amounts of regents and so on, have been determined. (author)

  4. Study of the reaction {pi}{sup -}p {yields} {pi}{sup +}{pi}{sup -}n at 870 MeV; Etude de la reaction {pi}{sup -}p {yields} {pi}{sup +}{pi}{sup -}n a 870 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Zsembery, J [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1969-07-01

    In the reaction {pi}{sup -}p {yields}{pi}{sup +}{pi}{sup -}n, we have measured the {pi}{sup +} momentum spectrum at various angles, from which the distributions (d{sup 2}{sigma}/dMd{omega}) of the ({pi}{sup -}n) system have been deduced. These distributions are compared with those obtained by a phenomenological model. This comparison allows a determination of the amplitude of the inelastic waves. It is found that the resonant waves D15 and F15 are no strongly coupled to the channel {delta}(1238) + {pi}. (author) [French] Dans la reaction {pi}{sup -}p {yields} {pi}{sup +}{pi}{sup -}n, nous avons mesure le spectre en impulsion des {pi}{sup +} a differents angles. Les distributions (d{sup 2}{sigma}/dMd{omega}) du systeme ({pi}{sup -}n) en ont ete deduites. Ces distributions sont comparees a celles obtenues par un modele phenomenologique. De la comparaison on determine l'amplitude des ondes inelastiques. Les ondes resonnantes D15 et FIS ne sont pas liees fortement a la voie {delta}(1238) + {pi}. (auteur)

  5. Diffractive production of two {rho}{sup 0} {sub L} mesons in e{sup +}e{sup -} collisions

    Energy Technology Data Exchange (ETDEWEB)

    Segond, M.; Wallon, S. [Universite Paris-Sud - CNRS, LPT, Orsay (France); Szymanowski, L. [Universite Paris-Sud - CNRS, LPT, Orsay (France); Soltan Institute for Nuclear Studies, Warsaw (Poland); Universite de Liege, Liege (Belgium); Ecole Polytechnique - CNRS, CPHT, Palaiseau (France)

    2007-09-15

    We present an estimate of the cross-section for the exclusive production of a {rho}{sub L}{sup 0}-meson pair in e{sup +}e{sup -} scattering, which will be studied in the future high-energy International Linear Collider. For this aim, we complete calculations of the Born order approximation of the amplitudes {gamma}{sup *}{sub L,T}(Q{sub 1}{sup 2}){gamma}{sup *}{sub L,T}(Q{sub 2}{sup 2}){yields}{rho}{sub L}{sup 0}{rho}{sub L}{sup 0}, for arbitrary polarization of virtual photons and longitudinally polarized mesons, in the kinematical region s>>-t,Q{sub 1} {sup 2},Q{sub 2} {sup 2}. These processes are completely calculable in the hard region Q{sub 1}{sup 2},Q{sub 2}{sup 2}>>{lambda}{sup 2}{sub QCD}, and we perform most of the calculations in an analytical way. The resulting cross-section turns out to be large enough for this process to be measurable with foreseen luminosity and energy, for Q{sub 1}{sup 2} and Q{sub 2}{sup 2} in the range of a few GeV{sup 2}. (orig.)

  6. /sup 16/O(/sup 16/O, /sup 12/C)/sup 20/Ne reaction in the framework of the coupled channel formalism

    Energy Technology Data Exchange (ETDEWEB)

    Krause, O; Scheid, W; Greiner, W [Frankfurt Univ. (Germany, F.R.). Inst. fuer Theoretische Physik

    1974-01-01

    The transfer reaction /sup 16/O(/sup 16/O, /sup 12/C)/sup 20/Ne is treated in the coupled channel formalism. The influence of the transfer channels on the intermediate structure in the elastic excitation function is discussed. The /sup 16/O and /sup 20/Ne-nuclei are described in an ..cap alpha..-cluster model.

  7. Quantification of myocardial blood flow with {sup 82}Rb positron emission tomography: clinical validation with {sup 15}O-water

    Energy Technology Data Exchange (ETDEWEB)

    Prior, John O.; Allenbach, Gilles; Bischof Delaloye, Angelika [Centre Hospitalier Universitaire Vaudois and University of Lausanne, Nuclear Medicine Department, Lausanne (Switzerland); Valenta, Ines; Burger, Cyrill [Cardiac Imaging, Department of Radiology, Zurich (Switzerland); Kosinski, Marek [Centre Hospitalier Universitaire Vaudois and University of Lausanne, Nuclear Medicine Department, Lausanne (Switzerland); Centre Hospitalier Universitaire Vaudois and University of Lausanne, University Institute for Radiation Physics, Lausanne (Switzerland); Verdun, Francis R. [Centre Hospitalier Universitaire Vaudois and University of Lausanne, University Institute for Radiation Physics, Lausanne (Switzerland); Kaufmann, Philipp A. [Cardiac Imaging, Department of Radiology, Zurich (Switzerland); University of Zurich, Zurich Centre for Integrative Human Physiology (ZIHP), Zurich (Switzerland)

    2012-06-15

    Quantification of myocardial blood flow (MBF) with generator-produced {sup 82}Rb is an attractive alternative for centres without an on-site cyclotron. Our aim was to validate {sup 82}Rb-measured MBF in relation to that measured using {sup 15}O-water, as a tracer 100% of which can be extracted from the circulation even at high flow rates, in healthy control subject and patients with mild coronary artery disease (CAD). MBF was measured at rest and during adenosine-induced hyperaemia with {sup 82}Rb and {sup 15}O-water PET in 33 participants (22 control subjects, aged 30 {+-} 13 years; 11 CAD patients without transmural infarction, aged 60 {+-} 13 years). A one-tissue compartment {sup 82}Rb model with ventricular spillover correction was used. The {sup 82}Rb flow-dependent extraction rate was derived from {sup 15}O-water measurements in a subset of 11 control subjects. Myocardial flow reserve (MFR) was defined as the hyperaemic/rest MBF. Pearson's correlation r, Bland-Altman 95% limits of agreement (LoA), and Lin's concordance correlation {rho} {sub c} (measuring both precision and accuracy) were used. Over the entire MBF range (0.66-4.7 ml/min/g), concordance was excellent for MBF (r = 0.90, [{sup 82}Rb-{sup 15}O-water] mean difference {+-} SD = 0.04 {+-} 0.66 ml/min/g, LoA = -1.26 to 1.33 ml/min/g, {rho} {sub c} = 0.88) and MFR (range 1.79-5.81, r = 0.83, mean difference = 0.14 {+-} 0.58, LoA = -0.99 to 1.28, {rho} {sub c} = 0.82). Hyperaemic MBF was reduced in CAD patients compared with the subset of 11 control subjects (2.53 {+-} 0.74 vs. 3.62 {+-} 0.68 ml/min/g, p = 0.002, for {sup 15}O-water; 2.53 {+-} 1.01 vs. 3.82 {+-} 1.21 ml/min/g, p = 0.013, for {sup 82}Rb) and this was paralleled by a lower MFR (2.65 {+-} 0.62 vs. 3.79 {+-} 0.98, p = 0.004, for {sup 15}O-water; 2.85 {+-} 0.91 vs. 3.88 {+-} 0.91, p = 0.012, for {sup 82}Rb). Myocardial perfusion was homogeneous in 1,114 of 1,122 segments (99.3%) and there were no differences in MBF among the

  8. Measurement of Single Spin Asymmetry in <sup>3sup>He↑(e, e'K<sup>±>)X from a Transversely Polarized <sup>3sup>He Target

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Yuxiang [Univ. of Science and Technology, Hefei (China)

    2015-05-01

    Spin-dependent observables are a powerful tool to probe the internal structure of the nucleon and to study the dynamics of the strong interaction. Experimental study of the nucleon spin structure has provided us with many exciting and often surprising results. The so-called "spin crisis" in the 1980s revealed the limitation of naive quark-parton models and led to a worldwide effort to study the nucleon spin structure. However, this effort has been focused mainly on the nucleon's longitudinal spin structure. Recently, when the pioneer work revealed the significant role that transverse spin plays in understanding the full structure of the nucleon and in understanding the dynamics of the strong interaction, the study of the transverse spin structure became the new focus of the worldwide effort. Jefferson Lab (JLab) is located at Newport News, VA, US. It is equipped with the continuous electron beam accelerator facility (CEBAF) and four experimental halls: A, B, C and D. The accelerator can provide a continuous electron beam (2 ns beam bunch) with high polarization (up to ~ 90%) and high current (up to ~ 200μA) for fixed target experiments in all experimental halls. Hall A consists of two standard high-resolution spectrometers (HRS): left HRS (LHRS) and right HRS (RHRS). Another spectrometer, the BigBite spectrometer, can be installed on request by certain experiments. The experiment E06-010 ("Transversity Experiment") at JLab Hall A is the first measurement of the transverse spin structure of the neutron using a transversely polarized <sup>3sup>He target and a 5.89 GeV incident electron beam. The experiment measured target single spin asymmetries (SSA) and beam-target double-pin asymmetries (DSA) in semi-inclusive deep-inelastic scattering (SIDIS) and in deep-inelastic scattering (DIS) processes. It also collected inclusive hadron (pion, kaon and proton) production data parasitically. The scattered electrons were detected in the BigBite spectrometer with

  9. Experimental investigation of the reactions {sup 25}Mg({alpha},n){sup 28}Si, {sup 26}Mg({alpha},n){sup 29}Si, {sup 18}O({alpha},n){sup 21}Ne and their impact on stellar nucleosynthesis

    Energy Technology Data Exchange (ETDEWEB)

    Falahat, Sascha

    2010-06-10

    In the present dissertation, the nuclear reactions {sup 25}Mg({alpha},n){sup 28}Si, {sup 26}Mg({alpha},n){sup 29}Si, {sup 18}O({alpha},n){sup 21}Ne are investigated in the astrophysically interesting energy region from E{sub {alpha}}=1000 keV to E{sub {alpha}}=2450 keV. The experiments were performed at the Nuclear Structure Laboratory of the University of Notre Dame (USA) with the Van-de-Graaff accelerator KN. Solid state targets with evaporated magnesium or anodized oxygen were bombarded with {alpha}-particles and the released neutrons detected. For the detection of the released neutrons, computational simulations were used to construct a neutron detector based on {sup 3}He counters. Because of the strong occurrence of background reactions, different methods of data analysis were employed. Finally, the impact of the reactions {sup 25}Mg({alpha},n){sup 28}Si, {sup 26}Mg({alpha},n){sup 29}Si, {sup 18}O({alpha},n){sup 21}Ne on stellar nucleosynthesis is investigated by means of network calculations. (orig.)

  10. A high-resolution study of the sup 20 Ne( sup 3 He,t) sup 20 Na reaction and the sup 19 Ne(p,. gamma. ) sup 20 Na reaction rate

    Energy Technology Data Exchange (ETDEWEB)

    Smith, M S; Magnus, P V; Hahn, K I; Howard, A J; Parker, P D [A.W. Wright Nuclear Structure Lab., Yale Univ., New Haven, CT (United States); Champagne, A E; Mao, Z Q [Dept. of Physics, Princeton Univ., NJ (United States)

    1992-01-13

    A high-precision measurement of the {sup 20}Ne({sup 3}He,t){sup 20}Na reaction has been made using implanted {sup 20}Ne transmission targets to obtain pertinent information on the low-energy resonances in the {sup 19}Ne(p,{gamma}){sup 20}Na reaction. Resonance energies (447{+-}5, 658{+-}5, 787{+-}5, and 857{+-}5 keV) and upper limits on total intrinsic widths (<10, <6, <10, and <16 keV) have been measured for four excited states above the 2.199 MeV proton threshold in {sup 20}Na. The stellar {sup 19}Ne(p,{gamma}){sup 20}Na reaction rate is calculated for temperatures between 1x10{sup 8} and 1x10{sup 9} K. When combined with a recent study of the {sup 15}O({alpha},{gamma}){sup 19}Ne reaction, a new estimate is made of the conditions required for breakout from the Hot CNO cylce to the rapid proton capture process. (orig.).

  11. Determinations of [sup 90]Sr, [sup 137]Cs, [sup 226]Ra, [sup 228]Ra, [sup 210]Pb, [sup 210]Po contents in chinese diet and estimations of internal doses due to these radionuclides

    Energy Technology Data Exchange (ETDEWEB)

    Hongda, Zhu; Shouliang, Wang; Wei, Meng; Daoping, Wang; Xiujun, Zheng; Qingfen, Liu; Peng, Liu [Chinese Academy of Medical Sciences, Tianjin, TJ (China). Inst. of Radiomedicine

    1993-03-01

    As a part of Chinese Total Diet Survey taken place in 1990, the authors report the determined results on [sup 90]Sr, [sup 137]Cs, [sup 226]Ra, [sup 228]Ra, [sup 210]Pb and [sup 210]Pb and [sup 210]Po contents in various foods of Chinese total diet. Based on obtained dietary composition and the determined contents, the Annual Intakes (AI) and Committed Dose Equivalents (CDE) for the public by ingestion were estimated. It is shown that the total CDE for 6 radionuclides is about 0.24 mSv/a. The food categories and nuclides whose relative contributions to the total are dominant were vegetables, aquatic products and cereal, and [sup 210]Pb, [sup 210]Po, [sup 228]Ra, respectively. The results have updated the data from 1982 survey and have complemented important information for water consumption. The regional difference of dietary compositions and resultant internal doses are discussed as well.

  12. Analysis of radioactive fallout of the atomic bomb explosion on Bikini

    Energy Technology Data Exchange (ETDEWEB)

    Kimura, K

    1954-01-01

    The radioactive fallout was found to contain 55.2, 7.0, 11.8, and 26.0% of CaO, MgO, CO/sub 2/, and H/sub 2/O, respectively, the chief constituent being Ca(OH)/sub 2/. The electric-spark method of analysis showed the presence of Al, Fe, and Si in addition to Ca and Mg. Its decay curve followed I = ct/sup -1/ /sup 37/, where I represents radioactivity, t, time since the explosion took place, March 1, 1954, and c, const. Its specific activity measured on April 23, 1954, was 0.37 mc./g. Radioactive nuclei identified by March 26 were /sup 89/Sr, /sup 90/Sr, /sup 91/Y, /sup 95/Sr, /sup 95m/Nb, /sup 95/Nb, /sup 103/Ru, /sup 106/Rh, /sup 129m/Te, /sup 129/Te, /sup 132/Te, /sup 131/I, /sup 132/I, /sup 140/Ba, /sup 141/Ce, /sup 144/Ce, /sup 143/Pr, /sup 144/Pr, /sup 147/Nd, /sup 147/Pm, /sup 35/S, /sup 45/Ca, /sup 237/U, and /sup 239/Pu.

  13. {sup 119}Sn-NMR investigations on superconducting Ca{sub 3}Ir{sub 4}Sn{sub 13}: Evidence for multigap superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Sarkar, R., E-mail: rajibsarkarsinp@gmail.com [Institute for Solid State Physics, TU Dresden, D-01069 Dresden (Germany); Brückner, F.; Günther, M. [Institute for Solid State Physics, TU Dresden, D-01069 Dresden (Germany); Wang, Kefeng; Petrovic, C. [Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973 (United States); Biswas, P.K.; Luetkens, H.; Morenzoni, E.; Amato, A. [Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland); Klauss, H-H. [Institute for Solid State Physics, TU Dresden, D-01069 Dresden (Germany)

    2015-12-15

    We report bulk superconductivity (SC) in Ca{sub 3}Ir{sub 4}Sn{sub 13} by means of {sup 119}Sn nuclear magnetic resonance (NMR) experiments. Two classical signatures of BCS superconductivity in spin-lattice relaxation rate (1/T{sub 1}), namely the Hebel–Slichter coherence peak just below the T{sub c}, and the exponential decay in the superconducting phase, are evident. The noticeable decrease of {sup 119}Sn Knight shift below T{sub c} indicates spin-singlet superconductivity. The temperature dependence of the spin-lattice relaxation rate {sup 119}(1/T{sub 1}) is convincingly described by the multigap isotropic superconducting gap. NMR experiments do not witness any sign of enhanced spin fluctuations.

  14. Precision measurement of the ratio of the Λ{sub b}{sup 0} to B{sup ¯0} lifetimes

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andreotti, M. [Sezione INFN di Ferrara, Ferrara (Italy); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2014-06-27

    The LHCb measurement of the lifetime ratio of the Λ{sub b}{sup 0} baryon to the B{sup ¯0} meson is updated using data corresponding to an integrated luminosity of 3.0 fb{sup −1} collected using 7 and 8 TeV centre-of-mass energy pp collisions at the LHC. The decay modes used are Λ{sub b}{sup 0}→J/ψpK{sup −} and B{sup ¯0}→J/ψπ{sup +}K{sup −}, where the π{sup +}K{sup −} mass is consistent with that of the K{sup ¯⁎0}(892) meson. The lifetime ratio is determined with unprecedented precision to be 0.974±0.006±0.004, where the first uncertainty is statistical and the second systematic. This result is in agreement with original theoretical predictions based on the heavy quark expansion. Using the current world average of the B{sup ¯0} lifetime, the Λ{sub b}{sup 0} lifetime is found to be 1.479±0.009±0.010 ps.

  15. Non-standard γγ →l sup(+)l sup(-) processes in relativistic heavy ion collisions

    International Nuclear Information System (INIS)

    Almeida, L.D.; Natale, A.A.; Novaes, S.F.; Eboli, O.J.P.

    1991-02-01

    We study lepton pair production in heavy ion collisions with emphasis in nonstandard contributions of the QRD subprocess γ γ → l sup(+)l sup(-). The existence of compositeness of fermions and/or bosons can be tested in this reaction up to the TeV mass scale. We show that for some processes the capabilities of relativistic heavy ion colliders to disclose new physics supplant the possibilities of e sup(+)e sup(-) or pp-bar machines. In particular, the spin zero composite particles which couples predominantly to two-photons, predicted in composite models, can be studied in a broad range of masses. (author)

  16. Search for CP violation in B<sup>0sup>s to JΨΦ

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Chunlei [Univ. of Pittsburgh, PA (United States)

    2008-01-01

    The CDF experiment, which uses p$\\bar{p}$ collisions at √s = 1.9 TeV produced at the Fermilab Tevatron, is unique in its ability to observe all flavors of B hadrons and measure their properties. Among them, CP violation is of fundamental interest. In the B<sup>+> and B<sup>0sup> systems, measurements of CP violation parameters performed essentially at B factories have borne out the predictions of CKM model. Little is known, experimentally, about CP violation in the Bs<sup>0sup> system. The standard model predicts very little CP violation there, thus any nonzero measurement could be an indication of new physics. In this thesis, we will report on the very first flavor-tagged analysis of approximately 2000 Bs<sup>0sup> → J/ΨΦ decays reconstructed in a 1.35 fb<sup>-1sup> data sample collected at CDF. This channel is sensitive not only to the width difference ΔΓ in the B{sub s}{sup 0} system but also to the CP violation parameter βs. The final result we obtain is a confidence region in the two dimensional space of βs and ΔΓ. Assuming the standard model predictions of βs and ΔΓ, the probability is 15%, corresponding to 1.5 Gaussian standard deviations.

  17. High dose He/sup +/ bombardment of niobium at 800/sup 0/ to 1400/sup 0/C

    Energy Technology Data Exchange (ETDEWEB)

    Biersack, J P [Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F.R.)

    1976-12-01

    In proposed fusion reactors, the first wall will be bombarded by low energy D/sup +/, T/sup +/ and He/sup +/ ions to very high doses. Room temperature irradiations with 9 keV He/sup +/ (Roth et al. 1975) showed an initial phase of blistering between 0.05 and 0.25 C/cm/sup 2/, and a final state of considerable surface roughness at 8 to 112 C/cm/sup 2/(7 x 10/sup 20/He/sup +//cm/sup 2/). The present irradiation experiments with 6 keV He/sup +/ are carried out with polycrystalline Nb foils at temperatures between 800 and 1400/sup 0/C in order to study the influence of He mobility and of Nb surface diffusion during irradiation. The applied doses range from 2.5 x 10/sup 17/He/sup +//cm/sup 2/ (blistering) to 5 x 10/sup 20/He/sup +//cm/sup 2/ which corresponds to at least several weeks of reactor operation. The resulting changes of the niobium surface structures are observed by scanning electron microscopy and are pictorially presented in this paper. Mainly, sponge-like open structures are seen to develop at high doses, with increasing physical dimensions at higher temperatures.

  18. Gamma-ray spectroscopy of nuclei near {sup 100}Sn

    Energy Technology Data Exchange (ETDEWEB)

    Seweryniak, D; Nyberg, J; Fahlander, C [Uppsala Univ. (Sweden). Dept. of Radiation Sciences; Cederwall, B; Norline, L; Johnson, A; Kerek, A [Manne Siegbahn Inst. of Physics, Stockholm (Sweden); [Royal Inst. of Tech., Stockholm (Sweden); Adamides, E [National Centre for Scientific Research, Ag. Paraskevi, Attiki (Greece); Atac, A; Piiparinen, M; Sletten, G [Niels Bohr Inst., Copenhagen (Denmark); Angelis, G de [Laboratori Nazionali di legnaro (Italy); Grawe, H; Schubart, R [Hahn-Meitner-Institut Berlin GmbH (Germany); Ideguchi, E; Mitarai, S [Kyushu Univ., Fukuoka (Japan). Dept. of Physics; Julin, R; Juutinen, S; Tormanen, S; Virtanen, A [Jyvaeskylae Univ. (Finland). Dept. of Physics; Karczmarczyk, W; Kownacki, J [Warsaw Univ. (Poland)

    1992-08-01

    Proton rich nuclei close to {sup 100}Sn have been investigated in an in-beam {gamma}-ray spectroscopic study using the NORDBALL detector array, including arrays of charged particle and neutron detectors. Excited states were identified for the first time in {sup 102}In, {sup 106,107,108}Sb and tentatively in {sup 108,109}Te. The nucleus {sup 110}Te was also populated and studied for the first time in an in-beam experiment. (author). 4 figs.

  19. Development of {sup 90}Sr-{sup 90}Y generators; Desenvolvimento de geradores de {sup 90}Sr-{sup 90}Y

    Energy Technology Data Exchange (ETDEWEB)

    Barrio, Graciela, E-mail: gracielabarrio@gmail.co [Pontificia Univ. Catolica de Sao Paulo (PUC-SP), SP (Brazil). Dept. de Fisica; Osso Junior, Joao Alberto, E-mail: jaossoj@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2007-07-01

    Yttrium-90 is a radioisotope of great interest in the field of Nuclear Medicine. It is considered one of the most important and most used radionuclides for radioimmunotherapeutical applications, especially promising for the treatment of certain types of cancer. Another important application of {sup 90}Y is radio synovectomy. This radionuclide has a half-life of 64 hours, emits long range beta particles (maximum energy of 2.3 MeV) and decays, without intermediate nuclides, to a stable daughter. {sup 90}Y may be obtained carrier-free, generated by the decay of its parent {sup 90}Sr (half-life=28 years). {sup 90}Sr is a product from uranium fission, and due to its long half-life, can be indefinitely used, which is certainly advantageous. It is present in great amounts, and needs to be processed and purified in order to be used as raw material for the generators. Generators of {sup 90}Sr-{sup 90}Y may thus be used during various months, due to {sup 90}Sr long half-life. Several methods for the separation of {sup 90}Y from {sup 90}Sr by solvent extraction and ion exchange have been reported in literature. Thanks to its simplicity, ion exchange techniques have been more commonly used for this generator system. The main objective of this work was to develop a methodology for the preparation of {sup 90}Sr-{sup 90}Y generators, using cationic exchange resins. In such method, {sup 90}Sr is strongly adsorbed in the resin and {sup 90}Y is eluted by a 0.003 M EDTA solution. According to the quality control carried out, results showed that elution yields are greater than 65%, thus confirming the efficiency of the separation method used.

  20. The reaction {sup 48}Ca+{sup 248}Cm{yields}{sup 296}116{sup *} studied at the GSI-SHIP

    Energy Technology Data Exchange (ETDEWEB)

    Hofmann, S. [GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt (Germany); Goethe-Universitaet Frankfurt, Institut fuer Physik, Frankfurt (Germany); Heinz, S.; Mann, R.; Khuyagbaatar, J.; Ackermann, D.; Barth, W.; Block, M.; Burkhard, H.G.; Comas, V.F.; Dahl, L.; Heredia, J.A.; Kindler, B.; Kojouharov, I.; Lang, R.; Lommel, B.; Muenzenberg, G.; Tinschert, K. [GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt (Germany); Maurer, J.; Hessberger, F.P. [GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt (Germany); Johannes Gutenberg-Universitaet, Helmholtz-Institut Mainz, Mainz (Germany); Antalic, S.; Saro, S. [Comenius University, Department of Nuclear Physics and Biophysics, Bratislava (Slovakia); Eberhardt, K.; Kratz, J.V.; Runke, J.; Thoerle-Pospiech, P.; Trautmann, N. [Johannes Gutenberg-Universitaet Mainz, Mainz (Germany); Gostic, J.; Henderson, R.A.; Kenneally, J.M.; Moody, K.J.; Nelson, S.L.; Shaughnessy, D.A.; Stoyer, M.A.; Wilk, P.A. [Lawrence Livermore National Laboratory, Livermore, CA (United States); Leino, M.; Uusitalo, J. [University of Jyvaeskylae, Department of Physics, Jyvaeskylae (Finland); Nishio, K. [Japan Atomic Energy Agency, Tokai, Ibaraki (Japan); Popeko, A.G.; Yeremin, A.V. [Joint Institute for Nuclear Research, Dubna (Russian Federation)

    2012-05-15

    The synthesis of element 116 in fusion-evaporation reactions of a {sup 48}Ca beam with radioactive {sup 248}Cm targets was studied at the velocity filter SHIP of GSI in Darmstadt. At excitation energies of the compound nuclei of 40.9MeV, four decay chains were measured, which were assigned to the isotope {sup 292}116, and one chain, which was assigned to {sup 293}116. Measured cross-sections of (3.4{sub -1.6}{sup +2.7})pb and (0.9{sub -0.7}{sup +2.1}), respectively, and decay data of the chains agree with data measured previously at the Flerov Laboratory of Nuclear Reactions in Dubna. As a new result, one {alpha}-decay chain was measured, which terminates after four {alpha} decays by spontaneous fission. The {alpha} energies of the second-to-fourth decay are considerably higher than those measured for the {alpha} decays of {sup 289}114, {sup 285}Cn, and {sup 281}Ds and the spontaneous fission half-life is significantly longer than that of {sup 277}Hs measured in previous experiments. A possible assignment is discussed in the frame of excited quasiparticle states of nuclei populated in the decay chain from {sup 293}116. Also other possible assignments were considered and are discussed. At an excitation energy of 45.0MeV no events were observed resulting in a one-event cross-section limit of 1.6 pb. The technical aspects related with the use of radioactive target material at SHIP are described in detail. The experience gained in this experiment will serve as a basis for future experiments aiming to study still heavier elements at the velocity filter SHIP. (orig.)

  1. Analysis of K/sup -/K/sup +/ and. pi. /sup -/. pi. /sup +/ final states in 13 GeV K/sup -/p interactions. [Differential cross sections, density matrix elements, branching ratio

    Energy Technology Data Exchange (ETDEWEB)

    Brandenburg, G W; Carnegie, R K; Cashmore, R J; Davier, M; Lasinski, T A; Leith, D W.G.S.; Mathews, J A.J.; Walden, P; Williams, S H [Stanford Linear Accelerator Center, Calif. (USA)

    1976-03-01

    The differential cross sections and density matrix elements for the phi and rho/sup 0/ mesons have been measured in the reactions K/sup -/p..-->..K/sup -/K/sup +/(..lambda..,..sigma../sup 0/) and K/sup -/p..--> pi../sup -/..pi../sup +/(..lambda..,..sigma../sup 0/) at 13 GeV using a wire chamber spectrometer. The analysis shows that while the vector meson production is dominated by the natural parity exchange amplitude, some unnatural parity exchange is also required. Furthermore the phi and rho natural exchange cross sections are identical in shape and have the 2:1 relative strength expected in the quark model with K* and K** exchange degeneracy. The analysis of the clear peak-dip rho/sup 0/-..omega.. interference pattern observed in the ..pi../sup -/..pi../sup +/ data indicates that the ..omega.. production is in phase with the rho and of similar magnitude. Both the S* and f' meson are clearly observed in this experiment. The S* data are found to be consistent with S* parameters deduced from ..pi pi.. scattering analyses. The f' density matrix elements and a new limit on the f'..--> pi../sup -/..pi../sup +/ branching ratio are presented.

  2. Measurement of {sigma}(e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}) from threshold to 0.85 GeV{sup 2} using initial state radiation with the KLOE detector

    Energy Technology Data Exchange (ETDEWEB)

    Ambrosino, F. [Dipartimento di Scienze Fisiche dell' Universita ' Federico II' , Napoli (Italy); INFN Sezione di Napoli, Napoli (Italy); Archilli, F. [Dipartimento di Fisica dell' Universita ' Tor Vergata, Roma (Italy); INFN Sezione di Roma Tor Vergata, Roma (Italy); Beltrame, P., E-mail: beltrame@kph.uni-mainz.de [Institut fuer Kernphysik, Johannes Gutenberg-Universitaet Mainz (Germany); Bencivenni, G. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Bini, C. [Dipartimento di Fisica dell' Universita ' La Sapienza' , Roma (Italy); INFN Sezione di Roma, Roma (Italy); Bloise, C. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Bocchetta, S. [Dipartimento di Fisica dell' Universita ' Roma Tre' , Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Bossi, F. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Branchini, P. [INFN Sezione di Roma Tre, Roma (Italy); Capon, G.; Capussela, T. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Ceradini, F. [Dipartimento di Fisica dell' Universita ' Roma Tre' , Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Ciambrone, P.; De Lucia, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Santis, A. [Dipartimento di Fisica dell' Universita ' La Sapienza' , Roma (Italy); INFN Sezione di Roma, Roma (Italy); De Simone, P. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Zorzi, G. [Dipartimento di Fisica dell' Universita ' La Sapienza' , Roma (Italy); INFN Sezione di Roma, Roma (Italy); Denig, A., E-mail: denig@kph.uni-mainz.de [Institut fuer Kernphysik, Johannes Gutenberg-Universitaet Mainz (Germany); Di Domenico, A. [Dipartimento di Fisica dell' Universita ' La Sapienza' , Roma (Italy); INFN Sezione di Roma, Roma (Italy); Di Donato, C. [INFN Sezione di Napoli, Napoli (Italy)

    2011-06-06

    We have measured the cross section of the radiative process e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{gamma} with the KLOE detector at the Frascati {phi}-factory DA{Phi}NE, from events taken at a CM energy W=1 GeV. Initial state radiation allows us to obtain the cross section for e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}, the pion form factor {sup 2}|F{sub {pi}}| and the dipion contribution to the muon magnetic moment anomaly, {Delta}a{sub {mu}}{sup {pi}{pi}}=(478.5{+-}2.0{sub stat}{+-}5.0{sub syst}{+-}4.5{sub th})x10{sup -10} in the range 0.1sup 2}<0.85 GeV{sup 2}, where the theoretical error includes a SU(3) {chi}PT estimate of the uncertainty on photon radiation from the final pions. The discrepancy between the Standard Model evaluation of a{sub {mu}} and the value measured by the Muon g-2 collaboration at BNL is confirmed.

  3. Determination of {sup 10}Be, {sup 26}Al, and {sup 36}Cl in meteorites

    Energy Technology Data Exchange (ETDEWEB)

    Merchel, S.; Herpers [Koeln Univ. (Germany); Neumann, S.; Michel, R. [Hannover Univ. (Germany); Kubik, P.W.; Synal, H.A. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Suter, M. [Eidgenoessische Technische Hochschule, Zurich (Switzerland)

    1997-09-01

    Long-lived cosmogenic radionuclides were determined in stony ({sup 10}Be, {sup 26}Al) and iron ({sup 10}Be, {sup 26}Al, {sup 36}Cl) meteorites using AMS after radiochemical separation. A selection of these data is briefly discussed with respect to exposure histories of the meteorites and is compared to model calculations. (author) 2 figs., 5 refs.

  4. Multiple Tracer ({sup 4}He, {sup 14}C, {sup 39}Ar, {sup 3}H/{sup 3}He, {sup 85}Kr) Depth Profile in an Extensively Exploited Multilevel Aquifer System in the Venetian Plain, Italy

    Energy Technology Data Exchange (ETDEWEB)

    Mayer, A.; Claude, C [Centre Europeen de Recherche et d' Enseignement des Geosciences de l' Environnement, Aix-en-Provence (France); Purtschert, R. [Climate and Environmental Physics, University of Bern (Switzerland); Sueltenfuss, J. [Institute of Environmental Physics, University of Bremen (Germany); Travi, Y. [UMR-EMMAH, Universite d' Avignon et des Pays de Vaucluse, Avignon (France)

    2013-07-15

    Individual dating tracers have their specific inherent properties, advantages and limitations. Apparent {sup 4}He accumulation ages are biased as a function of a prior unknown external helium influx; {sup 14}C (T{sub 1/2}: 5730 a) dating in groundwater requires suitable geochemical correction schemes and {sup 39}Ar (T{sub 1/2}: 269 a) may be affected by underground production. In a multiple tracer study in the Venetian Plain, Italy, using {sup 4}He, {sup 14}C. {sup 39}Ar {sup 3}H/{sup 3}He and {sup 85}Kr data, the groundwater residence times in a depth profile consisting of different separated aquifers between 50-350 m depth are estimated. Moreover, limitations and uncertainties of the applied tracer methods are identified, assessed and quantified. (author)

  5. Measurement of the D{sup *{+-}} meson production cross section and F{sub 2}{sup c} {sup anti} {sup c} at high Q{sup 2} in ep scattering at HERA

    Energy Technology Data Exchange (ETDEWEB)

    Brinkmann, Martin

    2010-04-15

    The inclusive production cross section of D{sup *{+-}}(2010) mesons in deep-inelastic e{sup {+-}}p scattering is measured in the kinematic region of photon virtuality 100sup 2}<1000 GeV{sup 2} and inelasticity 0.02sup *} meson production are measured in the visible range defined by vertical stroke {eta}(D{sup *}) vertical stroke <1.5 and p{sub T}(D{sup *})>1.5 GeV. The data were collected by the H1 experiment during the period from 2004 to 2007 and correspond to an integrated luminosity of 351 pb{sup -1}. The charm contribution, F{sub 2}{sup c} {sup anti} {sup c}, to the proton structure function F{sub 2} is determined. The measurements are compared with QCD predictions. (orig.)

  6. Measurement of the Target-Normal Single-Spin Asymmetry Ay<sup>n> in the Deep Inelastic Region from the Reaction <sup>3sup>He↑>(e,e')

    Energy Technology Data Exchange (ETDEWEB)

    Katich, Joseph [Coll. of William and Mary, Williamsburg, VA (United States)

    2011-01-01

    A first measurement of the inclusive target single-spin asymmetry, A<sup>n>y, has been performed in deep-inelastic scattering of electrons from a <sup>3sup>He target polarized normal to the electron scattering plane. This asymmetry is void of contributions at the Born level, and thus is a direct observable for two-photon physics. The experiment was performed in Hall A at Thomas Jefferson National Accelerator Facility from October 2008 through early February 2009. The measurement is the first from a polarized neutron target. The final overall precision is several times better than previously existing SLAC proton data, and significantly extends the kinematic range over which the asymmetry has been measured. The asymmetry was measured at five kinematic points in the deep inelastic scattering region covering Q<sup>2sup> = 1 - 3 GeV<sup>2sup> and xB = 0.16 to 0.41. The asymmetry varied from 0.006 to 0.071 with astatistical precision at the 10<sup>-2sup> level.

  7. Measurement of the Neutron (<sup>3sup>He) Spin Structure at Low Q<sup>2sup> and the Extended Gerasimov-Drell-Hearn Sum Rule

    Energy Technology Data Exchange (ETDEWEB)

    Kominis, Ioannis [Princeton Univ., NJ (United States)

    2001-01-01

    This thesis presents the results of E-94010, an experiment at Thomas Jefferson National Accelerator Facility (TJNAF) designed to study the spin structure of the neutron at low momentum transfer, and to test the “extended” Gerasimov-Drell-Hearn (GDH) sum rule. The first experiment of its kind, it was performed in experimental Hall-A of TJNAF using a new polarized <sup>3sup>He facility. It has recently been shown that the GDH sum rule and the Bjorken sum rule are both special examples of a more general sum rule that applies to polarized electron scattering off nucleons. This generalized sum rule, due to Ji and Osborne, reduces to the GDH sum rule at Q<sup>2sup> = 0 and to the Bjorken sum rule at Q<sup>2sup> >> 1 GeV<sup>2sup>. By studying the Q<sup>2sup> evolution of the extended GDH sum, one learns about the transition from quark-like behavior to hadronic-like behavior. We measured inclusive polarized cross sections by scattering high energy polarized electrons off the new TJNAF polarized <sup>3sup>He target with both longitudinal and transverse target orientations. The high density <sup>3sup>He target, based on optical pumping and spin exchange, was used as an effective neutron target. The target maintained a polarization of about 35% at beam currents as high as 151tA. We describe the precision <sup>3sup>He polarimetry leading to a systematic uncertainty of the target polarization of 4% (relative). A strained GaAs photocathode was utilized in the polarized electron gun, which provided an electron beam with a polarization of about 70%, known to 3% (relative). By using six different beam energies (between 0.86 and 5.06 GeV) and a fixed scattering angle of 15.5°, a wide kinematic coverage was achieved, with 0.02 GeV<sup>2sup>< Q<sup>2sup> <1 GcV<sup>2sup> and 0.5 GeV< W < 2.5 GeV for the squared momentum transfer and invariant mass, respectively. From the measured cross sections we extract the <sup>3sup>He spin structure functions g$3 He

  8. On Nuclear Molecules Built up from sup 1 sup 3 sup 2 Sn Components

    CERN Document Server

    Swiatecki, W J

    2003-01-01

    The possible existence of nuclear quasi-molecules built up from sup 1 sup 3 sup 2 Sn components is investigated. The crucial question is whether the extra stability of the doubly magic sup 1 sup 3 sup 2 Sn nuclei makes them sufficiently rigid to be able to withstand the strains imposed by their mutual interactions. It is argued that if the simplest quasi-molecular dumbbell configuration were found to be (meta-)stable, then triangular and even tetrahedral structures might have comparable barriers against disintegration and comparable spontaneous fission lifetimes. These are estimated using simplifying assumptions. As regards the dumbbell's stability, one may relate this to the existence of a potential energy pocket in the deformation energy landscape of a fissioning sup 2 sup 6 sup 4 Fm nucleus, and to the presence of ''bimodal'' fission in heavy Fm isotopes. Further experimental and theoretical studies of such systems may be relevant for answering the question concerning nuclear quasi-molecules.

  9. Synergies of the decays B{sub s} → K{sup *-} l{sup +}ν and B → K* l{sup +}l{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Feldmann, Thorsten; Mueller, Bastian; Dyk, Danny van [Universitaet Siegen (Germany)

    2015-07-01

    In light of the tension between inclusive and exclusive determinations of the CKM matrix element vertical stroke V{sub ub} vertical stroke, we investigate with the decay B{sub s} → K{sup *-} l{sup +}ν an interesting, independent probe of vertical stroke V{sub ub} vertical stroke in exclusive decays. We present analytic expressions for the full angular distribution of the subsequent K{sup *-} → K{sup -}π decay. Numerical estimates are given for a subset of observables. In addition, we combine the angular observables of the decays B{sub s} → K{sup *-} l{sup +}ν and B → K* l{sup +}l{sup -} into new optimized observables, which offer the opportunity to reduce theoretical uncertainties.

  10. In pursuit of new physics with B{sub s,d}{sup 0}→ℓ{sup +}ℓ{sup −}

    Energy Technology Data Exchange (ETDEWEB)

    Fleischer, Robert [Nikhef,Science Park 105, NL-1098 XG Amsterdam (Netherlands); Department of Physics and Astronomy, Vrije Universiteit Amsterdam,NL-1081 HV Amsterdam (Netherlands); Jaarsma, Ruben; Tetlalmatzi-Xolocotzi, Gilberto [Nikhef,Science Park 105, NL-1098 XG Amsterdam (Netherlands)

    2017-05-30

    Leptonic rare decays of B{sub s,d}{sup 0} mesons offer a powerful tool to search for physics beyond the Standard Model. The B{sub s}{sup 0}→μ{sup +}μ{sup −} decay has been observed at the Large Hadron Collider and the first measurement of the effective lifetime of this channel was presented, in accordance with the Standard Model. On the other hand, B{sub s}{sup 0}→τ{sup +}τ{sup −} and B{sub s}{sup 0}→e{sup +}e{sup −} have received considerably less attention: while LHCb has recently reported a first upper limit of 6.8×10{sup −3} (95% C.L.) for the B{sub s}{sup 0}→τ{sup +}τ{sup −} branching ratio, the upper bound 2.8×10{sup −7} (90% C.L.) for the branching ratio of B{sub s}{sup 0}→e{sup +}e{sup −} was reported by CDF back in 2009. We discuss the current status of the interpretation of the measurement of B{sub s}{sup 0}→μ{sup +}μ{sup −}, and explore the space for New-Physics effects in the other B{sub s,d}{sup 0}→ℓ{sup +}ℓ{sup −} decays in a scenario assuming flavour-universal Wilson coefficients of the relevant four-fermion operators. While the New-Physics effects are then strongly suppressed by the ratio m{sub μ}/m{sub τ} of the lepton masses in B{sub s}{sup 0}→τ{sup +}τ{sup −}, they are hugely enhanced by m{sub μ}/m{sub e} in B{sub s}{sup 0}→e{sup +}e{sup −} and may result in a B{sub s}{sup 0}→e{sup +}e{sup −} branching ratio as large as about 5 times the one of B{sub s}{sup 0}→μ{sup +}μ{sup −}, which is about a factor of 20 below the CDF bound; a similar feature arises in B{sub d}{sup 0}→e{sup +}e{sup −}. Consequently, it would be most interesting to search for the B{sub s,d}{sup 0}→e{sup +}e{sup −} channels at the LHC and Belle II, which may result in an unambiguous signal for physics beyond the Standard Model.

  11. Evaporation residue cross sections and average neutron multiplicities in the /sup 64/Ni+/sup 92/Zr and /sup 12/C+/sup 144/Sm reactions leading to /sup 156/Er

    Energy Technology Data Exchange (ETDEWEB)

    Janssens, R.V.F.; Holzmann, R.; Henning, W.; Khoo, T.L.; Lesko, K.T.; Stephans, G.S.F.; Radford, D.C.; Van den Berg, A.M.; Kuehn, W.; Ronningen, R.M.

    1986-11-27

    Evaporation residue cross sections and neutron multiplicity distributions have been measured for the /sup 12/C+/sup 144/Sm and /sup 64/Ni+/sup 92/Zr reactions leading to the same compound nucleous /sup 156/Er. Statistical model calculations can account for the data in the /sup 12/C-induced reaction. In contrast, the inhibition of neutron emission with respect to statistical model predictions seen in /sup 64/Ni+/sup 92/Zr cannot be explained even with the inclusion of the broad angular momentum distributions required to describe the fusion cross section data.

  12. Measurement of the flavour-specific CP-violating asymmetry a{sub sl}{sup s} in B{sub s}{sup 0} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); Andrews, J.E. [University of Maryland, College Park, MD (United States); and others

    2014-01-20

    The CP-violating asymmetry a{sub sl}{sup s} is studied using semileptonic decays of B{sub s}{sup 0} and B{sup ¯}{sub s}{sup 0} mesons produced in pp collisions at a centre-of-mass energy of 7 TeV at the LHC, exploiting a data sample corresponding to an integrated luminosity of 1.0 fb{sup −1}. The reconstructed final states are D{sub s}{sup ±}μ{sup ∓}, with the D{sub s}{sup ±} particle decaying in the ϕπ{sup ±} mode. The D{sub s}{sup ±}μ{sup ∓} yields are summed over B{sup ¯}{sub s}{sup 0} and B{sub s}{sup 0} initial states, and integrated with respect to decay time. Data-driven methods are used to measure efficiency ratios. We obtain a{sub sl}{sup s}=(−0.06±0.50±0.36)%, where the first uncertainty is statistical and the second systematic.

  13. gamma-decay of resonance-like structure observed in sup 3 sup 0 Si(p,gamma) sup 3 sup 1 P reaction

    CERN Document Server

    Kachan, A S; Korda, L P; Mishchenko, V M; Korda, V Y

    2002-01-01

    gamma-Decay of a resonance-like structure observed in the reaction sup 3 sup 0 Si (p, gamma) sup 3 sup 1 P in the energy region E sub p = 1.4 - 2.7 MeV of accelerated protons is studied. The M1 resonance built on the ground state of sup 3 sup 1 P is identified. The position of the M1 resonance is explained taking into account pairing forces.

  14. Signatures of non-adiabatic dynamics in the fine-structure state distributions of the OH(X{sup ~}/A{sup ~}) products in the B-band photodissociation of H{sub 2}O

    Energy Technology Data Exchange (ETDEWEB)

    Zhou, Linsen [Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093 (China); Xie, Daiqian, E-mail: dqxie@nju.edu.cn, E-mail: hguo@unm.edu [Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093 (China); Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); Guo, Hua, E-mail: dqxie@nju.edu.cn, E-mail: hguo@unm.edu [Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131 (United States)

    2015-03-28

    A detailed quantum mechanical characterization of the photodissociation dynamics of H{sub 2}O at 121.6 nm is presented. The calculations were performed using a full-dimensional wave packet method on coupled potential energy surfaces of all relevant electronic states. Our state-to-state model permits a detailed analysis of the OH(X{sup ~}/A{sup ~}) product fine-structure populations as a probe of the non-adiabatic dissociation dynamics. The calculated rotational state distributions of the two Λ-doublet levels of OH(X{sup ~}, v = 0) exhibit very different characteristics. The A′ states, produced mostly via the B{sup ~}→X{sup ~} conical intersection pathway, have significantly higher populations than the A″ counterparts, which are primarily from the B{sup ~}→A{sup ~} Renner-Teller pathway. The former features a highly inverted and oscillatory rotational state distribution, while the latter has a smooth distribution with much less rotational excitation. In good agreement with experiment, the calculated total OH(X{sup ~}) rotational state distribution and anisotropy parameters show clear even-odd oscillations, which can be attributed to a quantum mechanical interference between waves emanating from the HOH and HHO conical intersections in the B{sup ~}→X{sup ~} non-adiabatic pathway. On the other hand, the experiment-theory agreement for the OH(A{sup ~}) fragment is also satisfactory, although some small quantitative differences suggest remaining imperfections of the ab initio based potential energy surfaces.

  15. Theoretical Interpretation of Pass 8 Fermi -LAT e {sup +} + e {sup −} Data

    Energy Technology Data Exchange (ETDEWEB)

    Di Mauro, M. [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States); Manconi, S.; Donato, F.; Fornengo, N.; Bonino, R.; Negro, M. [Department of Physics, University of Torino, via P. Giuria 1, I-10125 Torino (Italy); Vittino, A. [Physik-Department T30D, Technische Universität München, James-Franck Straße 1, D-85748 Garching (Germany); Baldini, L.; Di Lalla, N.; Manfreda, A. [Università di Pisa and Istituto Nazionale di Fisica Nucleare, Sezione di Pisa I-56127 Pisa (Italy); Latronico, L.; Maldera, S. [Istituto Nazionale di Fisica Nucleare, via P. Giuria 1, I-10125 Torino (Italy); Pesce-Rollins, M.; Sgrò, C.; Spada, F. [Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)

    2017-08-20

    The flux of positrons and electrons ( e {sup +} + e {sup −}) has been measured by the Fermi Large Area Telescope (LAT) in the energy range between 7 GeV and 2 TeV. We discuss a number of interpretations of Pass 8 Fermi -LAT e {sup +} + e {sup −} spectrum, combining electron and positron emission from supernova remnants (SNRs) and pulsar wind nebulae (PWNe), or produced by the collision of cosmic rays (CRs) with the interstellar medium. We find that the Fermi -LAT spectrum is compatible with the sum of electrons from a smooth SNR population, positrons from cataloged PWNe, and a secondary component. If we include in our analysis constraints from the AMS-02 positron spectrum, we obtain a slightly worse fit to the e {sup +} + e {sup −} Fermi -LAT spectrum, depending on the propagation model. As an additional scenario, we replace the smooth SNR component within 0.7 kpc with the individual sources found in Green’s catalog of Galactic SNRs. We find that separate consideration of far and near sources helps to reproduce the e {sup +} + e {sup −} Fermi -LAT spectrum. However, we show that the fit degrades when the radio constraints on the positron emission from Vela SNR (which is the main contributor at high energies) are taken into account. We find that a break in the power-law injection spectrum at about 100 GeV can also reproduce the measured e {sup +} + e {sup −} spectrum and, among the CR propagation models that we consider, no reasonable break of the power-law dependence of the diffusion coefficient can modify the electron flux enough to reproduce the observed shape.

  16. /sup 58/Ni(/sup 16/O, /sup 12/C)/sup 62/Zn reaction at an incident energy 80 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Okuma, Yasuhiko [Osaka Univ., Suita (Japan). Research Center for Nuclear Physics; Motobayashi, Tooru; Takimoto, Kiyohiko; Shimoura, Susumu; Ogino, Kouya; Fukada, Mamoru; Suehiro, Teruo; Matsuki, Seishi; Yanabu, Takuji

    1983-03-01

    Cross section angular distributions for the /sup 16/O + /sup 58/Ni elastic scattering and the /sup 58/Ni(/sup 16/O, /sup 12/C)/sup 62/Zn- 3.8416 MeV reaction leading to the discrete and continuum states at an incident energy Esub(lab)(/sup 16/O) = 80 MeV have been measured. The eight low-lying single and double energy levels were observed in the energy spectra of the /sup 58/Ni(/sup 16/O, /sup 12/C)/sup 62/Zn reaction. Populations of these levels have the cross sections of 1-200 ..mu..b/sr. The ground state cross section was proved to change with the incident energy by comparing the present data with the other 46 and 60 MeV data. The cross section angular distribution for the ground state transition changes also with the incident energy. The data points for the 46 MeV show a typical bell shape angular distribution. The angular distribution for the 60 MeV reveals a forward peaked and pronounced oscillation pattern, while that for the 80 MeV shows an oscillation damping with the angle and then a monotonous fall on the angle. Optical model parameters were deduced from the best fit to the measurements of the /sup 16/O + /sup 58/Ni elastic scattering. The EFR-DWBA calculations of the (/sup 16/O, /sup 12/C) results were performed with reasonable fits for the cross section angular distributions of observed energy levels. The optical model parameters giving good representations of the ..cap alpha..-transfer data have the property that the real diffuseness parameter has a large value almost equal to the radius parameter. The inclusion of Coulomb correction in the transfer interaction causes a reduction of 0.9 times in cross section, but no change in angular distribution. The dependence of the angular distribution shape on the incident energy can be reproduced by the EFR-DWBA calculation even if only one parameter set is used in the calculation over the wide incident energy range.

  17. Ab initio study of {sup 2}H(d,{gamma}){sup 4}He, {sup 2}H(d,p){sup 3}H, and {sup 2}H(d,n){sup 4}He reactions and the tensor force

    Energy Technology Data Exchange (ETDEWEB)

    Arai, K.; Aoyama, S.; Suzuki, Y.; Descouvemont, P.; Baye, D. [Division of General Education, Nagaoka National College of Technology, 888 Nishikatakai, Nagaoka, Niigata, 940-8532 (Japan); Center for Academic Information Service, Niigata University, Niigata 950-2181 (Japan); Department of Physics, Niigata University, Niigata 950-2181, Japan and RIKEN Nishina Center, Wako 351-0198 (Japan); Physique Nucleaire Theorique et Physique Mathematique, C.P.229, Universite Libre de Bruxelles, B 1050 Brussels (Belgium); Physique Quantique, CP165/82, Universite Libre de Bruxelles, B-1050 Brussels (Belgium)

    2012-11-12

    The {sup 2}H(d,p){sup 3}H, {sup 2}H(d,n){sup 3}He, and {sup 2}H(d,{gamma}){sup 4}He reactions at low energies are studied with realistic nucleon-nucleon interactions in an ab initio approach. The obtained astrophysical S-factors are all in very good agreement with experiment. The most important channels for both transfer and radiative capture are all found to dominate thanks to the tensor force.

  18. Application of {sup 14}N({sup 3}He,{sup 4}He){sup 13}N nuclear reaction to nitrogen profiling

    Energy Technology Data Exchange (ETDEWEB)

    Wielunski, L.S. [Commonwealth Scientific and Industrial Research Organisation (CSIRO), Lindfield, NSW (Australia). Div. of Applied Physics

    1996-12-31

    In this paper the {sup 14}N({sup 3}He,{sup 4}He){sup 1`}3N reaction is proposed for nitrogen profiling in metals and other materials. The beam energy is chosen to be 4.65 MeV in order to use the high cross section. Two types of particle filtering are used: a 25 {mu}m thick mylar in front of the detector to avoid backscattered particle pileup and reduced detector bias voltage to avoid full energy detection of high energy protons produced by competing reactions. The depth resolution is about 150-200 nm and the sensitivity is better than for the {sup 14}N(d,{sup 4}He){sup 12}C reaction. The low level of neutron radiation background allows use of this reaction in accelerator laboratories without radiation shielding. 11 refs., 5 figs.

  19. Application of {sup 14}N({sup 3}He,{sup 4}He){sup 13}N nuclear reaction to nitrogen profiling

    Energy Technology Data Exchange (ETDEWEB)

    Wielunski, L S [Commonwealth Scientific and Industrial Research Organisation (CSIRO), Lindfield, NSW (Australia). Div. of Applied Physics

    1997-12-31

    In this paper the {sup 14}N({sup 3}He,{sup 4}He){sup 1`}3N reaction is proposed for nitrogen profiling in metals and other materials. The beam energy is chosen to be 4.65 MeV in order to use the high cross section. Two types of particle filtering are used: a 25 {mu}m thick mylar in front of the detector to avoid backscattered particle pileup and reduced detector bias voltage to avoid full energy detection of high energy protons produced by competing reactions. The depth resolution is about 150-200 nm and the sensitivity is better than for the {sup 14}N(d,{sup 4}He){sup 12}C reaction. The low level of neutron radiation background allows use of this reaction in accelerator laboratories without radiation shielding. 11 refs., 5 figs.

  20. Lifetime measurements in self-conjugate nuclei {sup 44}Ti, {sup 48}Cr and {sup 52}Fe

    Energy Technology Data Exchange (ETDEWEB)

    Arnswald, K.; Reiter, P.; Birkenbach, B.; Blazhev, A.; Braunroth, T.; Dewald, A.; Fransen, C.; Fu, B.; Hennig, A.; Hirsch, R.; Lewandowski, L.; Litzinger, J.; Mueller-Gatermann, C.; Rosiak, D.; Saed-Samii, N.; Schneiders, D.; Seidlitz, M.; Siebeck, B.; Steinbach, T.; Vogt, A.; Wolf, K.; Zell, K.O. [Institut fuer Kernphysik, Universitaet zu Koeln (Germany)

    2016-07-01

    Reduced transition strengths expressed with B(E2) values are sensitive signatures to describe collective excitations of atomic nuclei and are indispensable to understand nuclear shell structures. Along the N=Z line in the 1f{sub 7/2} shell they provide stringent tests of recent shell-model interactions. So far, B(E2, 2{sub 1}{sup +} → 0{sub g.s.}{sup +}) values for the self-conjugate {sup 44}{sub 22}Ti,{sup 48}{sub 24}Cr,{sup 52}{sub 26}Fe isotopes are known only with considerable errors. Recoil Distance Doppler-Shift (RDDS) experiments were performed employing the Cologne coincidence plunger device to measure lifetimes with high precision in order to deduce model-independent B(E2) values. Excited states in the nuclei of interest were populated with fusion-evaporation reactions. γ rays were detected by an array of 12 HPGe detectors. Precise B(E2, 2{sub 1}{sup +} → 0{sub g.s.}{sup +}) values are measured to be 204{sup +16}{sub -14} e{sup 2}fm{sup 4}, 262 ± 3 e{sup 2}fm{sup 4}, and 269 ± 8 e{sup 2}fm{sup 4} for {sup 44}Ti, {sup 48}Cr, and {sup 52}Fe, respectively. The results are compared to recent shell-model calculations on the basis of GX1A interaction. While the excitation energies are reproduced quite well, the B(E2) values show considerable differences.

  1. Indications for the decays D/sub s//sup +-/ → eta π/sup +-/ and D/sub s//sup +-/ → eta' π/sup +-/

    International Nuclear Information System (INIS)

    Wormser, G.

    1987-11-01

    A search for D/sub s//sup +-/ decays into eta π/sup +-/ and eta' π/sup +-/ has been performed by the MarkII collaboration at the PEP e + e - storage ring. Eta particles are reconstructed by their γγ decay mode. The eta fragmentation has been measured and found to be in good agreement with the Lund model prediction. Eta' production has been measured for the first time in e + e - high energy annihilation. Good indications are found for both decay modes D/sub s//sup +-/ → eta π/sup +-/ and D/sub s//sup +-/ → eta' π/sup +-/

  2. An accurate redetermination of the sup 1 sup 1 sup 8 Sn binding energy

    CERN Document Server

    Borzakov, S B; Faikow-Stanczyk, H; Grigoriev, Y V; Panteleev, T; Pospísil, S; Smotritsky, L M; Telezhnikov, S A

    2002-01-01

    The energy of well-known strong gamma line from sup 1 sup 9 sup 8 Au, the 'gold standard', has been modified in the light of new adjustments in the fundamental constants and the value of 411.80176(12) keV was determined, which is 0.29 eV lower than the latest 1999 value. An energy calibration procedure for determining the neutron binding energy, B sub n , from complicated (n, gamma) spectra has been developed. A mathematically simple minimization function consisting only of terms having as parameters the coefficients of the energy calibration curve (polynomial) is used. A priori information about the relationships among the energies of different peaks on the spectrum is taken into account by a Monte-Carlo simulation. The procedure was used in obtaining B sub n for sup 1 sup 1 sup 8 Sn. The gamma-ray spectrum from thermal neutron radiative capture by sup 1 sup 1 sup 7 Sn has been measured on the IBR-2 pulsed reactor. gamma-rays were detected by a 72 cm sup 3 HPGe detector. For a better determination of B sub n...

  3. Herschel/HIFI line surveys: Discovery of interstellar chloronium (H{sub 2}Cl{sup +})

    Energy Technology Data Exchange (ETDEWEB)

    Lis, Dariusz C., E-mail: dcl@caltech.edu [California Institute of Technology, Cahill Center for Astronomy and Astrophysics MC 301-17, Pasadena, CA 91125 (United States)

    2015-01-22

    Prior to the launch of Herschel, HCl was the only chlorine-containing molecule detected in the interstellar medium (ISM). However, chemical models have identified chloronium, H{sub 2}Cl{sup +}, as a relatively abundant species that is potentially detectable. H{sub 2}Cl{sup +} was predicted to be most abundant in the environments where the ultraviolet radiation is strong: in diffuse clouds, or near the surfaces of dense clouds illuminated by nearby O and B stars. The HIFI instrument on Herschel provided the first detection of H{sub 2}Cl{sup +} in the ISM. The 2{sub 12}-1{sub 01} lines of ortho-H{sub 2}{sup 35}Cl{sup +} and ortho-H{sub 2}{sup 37}Cl{sup +} were detected in absorption toward NGC 6334I, and the 1{sub 11}-0{sub 00} transition of para-H{sub 2}{sup 35}Cl{sup +} was detected in absorption toward NGC 6334I and Sgr B2(S). The derived HCl/H{sub 2}Cl{sup +} column density ratios, ∼1-10, are within the range predicted by models of diffuse and dense Photon Dominated Regions (PDRs). However, the observed H{sub 2}Cl{sup +} column densities, in excess of 10{sup 13} cm{sup −2}, are significantly higher than the model predictions. These observations demonstrate the outstanding spectroscopic capabilities of HIFI for detecting new interstellar molecules and providing key constraints for astrochemical models.

  4. Kinetics of the electrolytic Fe<sup>+2sup>/Fe>+3sup> oxidation on various anode materials

    Directory of Open Access Journals (Sweden)

    Cifuentes, L.

    2003-08-01

    Full Text Available The kinetics of the electrolytic Fe<sup>+2sup>/Fe>+3sup> oxidation, relevant to hydro-electrometallurgical processing, have been studied on lead, platinum, ruthenium oxide, iridium oxide and graphite anodes in ferrous sulfate-sulfuric acid solutions. The oxidation rate depends on ferrous sulfate concentration, solution temperature and degree of agitation. Potentiodynamic studies show that: a the highest oxidation rate is obtained on platinum; b lead is unsuitable as anodic material for the said reaction; c the remaining anode materials show a similar and satisfactory performance.

    Se ha estudiado la cinética de la oxidación electrolítica Fe<sup>+2sup>/Fe>+3sup> -relevante para el procesamiento hidroelectrometalúrgico- sobre plomo, platino, óxido de rutenio, óxido de iridio y grafito en soluciones de sulfato ferroso en ácido sulfúrico. La velocidad de oxidación depende de la concentración de sulfato ferroso, la temperatura de la solución y el grado de agitación. Estudios potenciodinámicos demuestran que: a las mayores velocidades de oxidación se obtienen sobre platino; b el plomo es inadecuado como material anódico para la reacción mencionada; c los materiales anódicos restantes exhiben un desempeño similar y satisfactorio.

  5. NEW ACCURATE MEASUREMENT OF {sup 36}ArH{sup +} AND {sup 38}ArH{sup +} RO-VIBRATIONAL TRANSITIONS BY HIGH RESOLUTION IR ABSORPTION SPECTROSCOPY

    Energy Technology Data Exchange (ETDEWEB)

    Cueto, M.; Herrero, V. J.; Tanarro, I.; Doménech, J. L. [Molecular Physics Department, Instituto de Estructura de la Materia (IEM-CSIC), Serrano 123, E-28006 Madrid (Spain); Cernicharo, J. [Department of Astrophysics, CAB. INTA-CSIC. Crta Torrejón-Ajalvir Km 4, E-28850 Torrejón de Ardoz, Madrid (Spain); Barlow, M. J.; Swinyard, B. M., E-mail: jl.domenech@csic.es [Department of Physics and Astronomy, University College London. Gower Street, London WC1E 6BT (United Kingdom)

    2014-03-01

    The protonated argon ion, {sup 36}ArH{sup +}, was recently identified in the Crab Nebula from Herschel spectra. Given the atmospheric opacity at the frequency of its J = 1-0 and J = 2-1 rotational transitions (617.5 and 1234.6 GHz, respectively), and the current lack of appropriate space observatories after the recent end of the Herschel mission, future studies on this molecule will rely on mid-infrared observations. We report on accurate wavenumber measurements of {sup 36}ArH{sup +} and {sup 38}ArH{sup +} rotation-vibration transitions in the v = 1-0 band in the range 4.1-3.7 μm (2450-2715 cm{sup –1}). The wavenumbers of the R(0) transitions of the v = 1-0 band are 2612.50135 ± 0.00033 and 2610.70177 ± 0.00042 cm{sup –1} (±3σ) for {sup 36}ArH{sup +} and {sup 38}ArH{sup +}, respectively. The calculated opacity for a gas thermalized at a temperature of 100 K and with a linewidth of 1 km s{sup –1} of the R(0) line is 1.6 × 10{sup –15} × N({sup 36}ArH{sup +}). For column densities of {sup 36}ArH{sup +} larger than 1 × 10{sup 13} cm{sup –2}, significant absorption by the R(0) line can be expected against bright mid-IR sources.

  6. {sup 5}He ternary fission yields of {sup 252}Cf and {sup 235}U(n,f)

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, J. K. [Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 (United States); Ramayya, A. V. [Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 (United States); Hamilton, J. H. [Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 (United States); Beyer, C. J. [Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 (United States); Kormicki, J. [Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 (United States); Zhang, X. Q. [Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 (United States); Rodin, A. [Flerov Laboratory for Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russia (Russian Federation); Formichev, A. [Flerov Laboratory for Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russia (Russian Federation); Kliman, J. [Flerov Laboratory for Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russia (Russian Federation); Krupa, L. [Flerov Laboratory for Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russia (Russian Federation)] (and others)

    2000-04-01

    The relative {sup 4}He and {sup 5}He ternary fission yields were determined from a careful analysis of the energy distribution of {alpha} spectra from a new measurement with a {sup 252}Cf source and from published data on {sup 252}Cf and {sup 235}U(n,f). The kinetic energies of the {sup 5}He and {sup 4}He ternary particles were found to be approximately 11 and 16 MeV, respectively. {sup 5}He particles contribute 10-20 % to the total alpha yield with the remainder originating from {sup 4}He accompanied fission. (c) 2000 The American Physical Society.

  7. <sup>87sup>Sr/>86sup>Sr Concentrations in the Appalachian Basin: A Review

    Energy Technology Data Exchange (ETDEWEB)

    Mordensky, Stanley P. [Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States); National Energy Technology Lab. (NETL), Albany, OR (United States); Lieuallen, A. Erin [Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States); National Energy Technology Lab. (NETL), Albany, OR (United States); Verba, Circe [National Energy Technology Lab. (NETL), Albany, OR (United States); Hakala, Alexandra [National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)

    2016-06-16

    This document reviews <sup>87sup>Sr/>86sup>Sr isotope data across the Appalachian Basin from existing literature to show spatial and temporal variation. Isotope geochemistry presents a means of understanding the geochemical effects hydraulic fracturing may have on shallow ground substrates. Isotope fractionation is a naturally occurring phenomenon brought about by physical, chemical, and biological processes that partition isotopes between substances; therefore, stable isotope geochemistry allows geoscientists to understand several processes that shape the natural world. Strontium isotopes can be used as a tool to answer an array of geological and environmental inquiries. In some cases, strontium isotopes are sensitive to the introduction of a non-native fluid into a system. This ability allows strontium isotopes to serve as tracers in certain systems. Recently, it has been demonstrated that strontium isotopes can serve as a monitoring tool for groundwater and surface water systems that may be affected by hydraulic fracturing fluids (Chapman et al., 2013; Kolesar Kohl et al., 2014). These studies demonstrated that <sup>87sup>Sr/>86sup>Sr values have the potential to monitor subsurface fluid migration in regions where extraction of Marcellus Shale gas is occurring. This document reviews publicly available strontium isotope data from 39 sample locations in the Appalachian Basin (Hamel et al., 2010; Chapman et al., 2012; Osborn et al., 2012; Chapman et al., 2013; Capo et al., 2014; Kolesar Kohl et al., 2014). The data is divided into two sets: stratigraphic (Upper Devonian/Lower Mississippi, Middle Devonian, and Silurian) and groundwater. ArcMap™ (ESRI, Inc.) was used to complete inverse distance weighting (IDW) analyses for each dataset to create interpolated surfaces in an attempt to find regional trends or variations in strontium isotopic values across the Appalachian Basin. <sup>87sup>Sr/>86sup>Sr varies up to ~ 0.011 across the

  8. Pseudo-spin band in the odd-odd nucleus sup 1 sup 7 sup 2 Lu

    CERN Document Server

    Venkova, T; Gast, W; Podsvirova, E O; Jäger, H M; Mihailescu, L; Bazzacco, D; Menegazzo, R; Lunardi, S; Alvarez, C R; Ur, C; Martínez, T; Angelis, G D; Axiotis, M; Napoli, D; Urban, W; Rzaca-Urban, T; Frauendorf, S

    2003-01-01

    High-spin states in the odd-odd nucleus sup 1 sup 7 sup 2 Lu have been populated in a sup 1 sup 7 sup 0 Er( sup 7 Li,5n) reaction and the emitted gamma-radiation was detected with the GASP array. Two sequences of a new identical band have been observed with the transition energies in the favoured and unfavoured sequences being identical within approx 3 keV at low spins and approx 1 keV at high spins over the whole observed spin range. An interpretation as a pseudo-spin singlet band of pi 1/2 sup - [541] x nu 1/2 sup - [420] configuration is proposed. It represents the best example of a pseudo-spin singlet band in normal deformed nuclei known until now.

  9. Luminescence properties of Nd{sup 3+}-doped Y{sub 2}Te{sub 4}O{sub 11} microcrystalline powder

    Energy Technology Data Exchange (ETDEWEB)

    Sobczyk, Marcin, E-mail: marcin.sobczyk@chem.uni.wroc.pl; Szymański, Damian

    2017-03-15

    In this paper, some spectroscopic properties of Y{sub 2}Te{sub 4}O{sub 11} microcrystalline powders, doped with Nd{sup 3+} ions are presented. The samples were successfully synthesized by the solid state reaction method. Absorption (300 K) and fluorescence (at 77 and 300 K) spectra as well as the fluorescence decay curves (300 K) of the {sup 4}F{sub 3/2} state are presented and analyzed. The phenomenological Ω{sub λ} (λ=2, 4, 6) Judd-Ofelt parameters were evaluated in order to determine radiative probabilities (A), branching ratios (β), the radiative lifetime (τ{sub R}) of the {sup 4}F{sub 3/2} level and the stimulated emission cross-section (σ{sub em}) for the {sup 4}F{sub 3/2} → {sup 4}I{sub J/2} (J=9 and 11) transitions of the Nd{sup 3+} ion. The fluorescence decay curves were single exponential for 0.01–5.0 at% of Nd{sup 3+} and became evidently non-exponential for higher Nd{sup 3+} ion concentration. With increasing activator concentration from 0.01 to 10.0 at%, the experimental lifetime of the emitting level decreases from 95 to 33 μs. The non-exponential fluorescence decay curve has been fitted by the Yokota-Tanimoto model, indicating that the energy migration process via a diffusion limited relaxation, plays a important role in the depopulation of the {sup 4}F{sub 3/2} level of Nd{sup 3+} ions doped in the Y{sub 2}Te{sub 4}O{sub 11} microcrystalline powder. The calculated absorption value (1.135×10{sup –19} cm{sup 2} at 807.5 nm) of the {sup 4}I{sub 9/2} → {sup 4}F{sub 5/2} transition as well as the value of the stimulated emission cross-section (1.196×10{sup –19} cm{sup 2} at 1063.5 nm) for that of {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} were compared with the corresponding values of other laser hosts. For the first time a very high σ{sub em} value of the {sup 4}F{sub 3/2} → {sup 4}I{sub 11/2} transition for TeO{sub 2}-based compounds, has been observed. From the presented spectroscopic properties follows that the Nd{sup 3+}:Y{sub 2

  10. Magnetization distribution of single-particle states and 2/sup +/ rotational states from muonic atoms

    CERN Document Server

    Backe, H; Engfer, R; Kankeleit, E; Link, R; Michaelsen, R; Petitjean, C; Schellenberg, L; Schneuwly, H; Schröder, W U; Vuilleumier, J L; Walter, H K; Zehnder, A

    1973-01-01

    The lowest states in muonic atoms are rather sensitive to the spatial distribution of the nuclear magnetization density, and several results were deduced from the broadening of the muonic 2p/sub 1/2/-1s/sub 1/2/ and 3d/sub 3/2/-2p/sub 1/2/ transitions. By measuring low energetic transitions such as the 2s/sub 1/2/-2p/sub 1/2/ transition or nuclear gamma -transitions, it is possible to resolve the magnetic hyperfine splittings. The magnetic hf splitting of the 2s/sub 1/2/-2p/sub 1/2/ transition in mu /sup 115/In and of the 3/2/sup +/-1/2/sup +/ nuclear gamma -transitions in mu /sup 203/Tl at 279 keV, and in mu /sup 205/Tl at 204 keV, have been resolved. For the 2/sup +/-0/sup +/ nuclear gamma -transition in mu /sup 190,192/Os at 187 keV and 206 keV, respectively, the magnetic hf splitting of the 2/sup +/ rotational levels and the intensities of the hf components were determined from a nearly resolved doublet splitting. (7 refs).

  11. Determination of radionuclides {sup 90}Sr, {sup 239,240} Pu, {sup 238}Pu and {sup 241}Am in soil using methods of extraction chromatography and coprecipitation; Stanovenie radionuklidov {sup 90}Sr, {sup 239,240}Pu, : 2{sup 38}Pu a {sup 241}Am v pode vyuzivajuce metody extrakcnej chromatografie a spoluzrazania

    Energy Technology Data Exchange (ETDEWEB)

    Gardonova, V.; Dulanska, S.; Bilohuscin, J. [Univerzita Komenskeho, Prirodovedecka fakulta, Katedra jadrovej chemie, 84215 Bratislava (Slovakia)

    2013-04-16

    Ecosystems, which include soil and sediments, contain not only natural radionuclides but also radionuclides from deposits, mainly {sup 137}Cs, {sup 90}Sr and {alpha}-emitting radionuclides such as {sup 239,240}Pu, {sup 238}Pu and {sup 241}Am, that originate from global fallout and nuclear facilities leaks worldwide. The goal of the work was optimization of separation and determination of {sup 90}Sr, {sup 238}Pu, {sup 239,240}Pu and {sup 241}Am in soil from Slovak Republic. The newest methods were applied for separation of selected radionuclides based on coprecipitation with oxalic salts and extraction chromatography using selective commercial sorbents. (authors)

  12. Effect of Tm{sup 3+} codoping on the near-infrared and upconversion emissions of Er{sup 3+} in TeO{sub 2}–ZnO–ZnF{sub 2} glasses

    Energy Technology Data Exchange (ETDEWEB)

    Miguel, A. [Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU,Alda. Urquijo s/n, 48013 Bilbao (Spain); Arriandiaga, M.A. [Departamento de Física Aplicada II, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, Apartado 644, Bilbao (Spain); Morea, R. [Instituto de Optica, Consejo Superior de Investigaciones Científicas CSIC, Serrano 121, 28006 Madrid (Spain); Fernandez, J. [Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU,Alda. Urquijo s/n, 48013 Bilbao (Spain); Materials Physics Center CSIC-UPV/EHU and Donostia International Physics Center, 20018 San Sebastian (Spain); Gonzalo, J. [Instituto de Optica, Consejo Superior de Investigaciones Científicas CSIC, Serrano 121, 28006 Madrid (Spain); Balda, R., E-mail: wupbacrr@bi.ehu.es [Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU,Alda. Urquijo s/n, 48013 Bilbao (Spain); Materials Physics Center CSIC-UPV/EHU and Donostia International Physics Center, 20018 San Sebastian (Spain)

    2014-10-15

    In this work, we report the near-infrared emission and upconversion of Er{sup 3+}–Tm{sup 3+} codoped fluorotellurite TeO{sub 2}–ZnO–ZnF{sub 2} glasses for different Tm{sup 3+} concentrations by using steady-state and time-resolved spectroscopy. A broad emission from 1350 to 1700 nm corresponding to the {sup 3}H{sub 4}→{sup 3}F{sub 4} (Tm{sup 3+}) and {sup 4}I{sub 13/2}→{sup 4}I{sub 15/2} (Er{sup 3+}) emissions which cover the complete telecommunication window of the wavelength-division-multiplexing transmission systems is observed. The full width at half-maximum of this broadband increases with increasing Tm{sup 3+}/Er{sup 3+} concentration ratio up to a value of∼150 nm. Energy transfer between Er{sup 3+} and Tm{sup 3+} ions is also observed and analyzed by both the temporal behavior of the near-infrared luminescence and the effect of Tm{sup 3+} codoping on the visible upconversion of Er{sup 3+} ions. The addition of Tm{sup 3+} reduces the upconverted green emission due to Er{sup 3+}→Tm{sup 3+} energy transfer whereas the red emission is enhanced due to the cross-relaxation {sup 3}F{sub 4}→{sup 3}H{sub 6}(Tm{sup 3+}):{sup 4}I{sub 11/2}→{sup 4}F{sub 9/2}(Er{sup 3+}) process. - Highlights: • Broadband emission covering the bands S, C+L and U of the optical telecommunications. • The effect of Tm{sup 3+} concentration were investigated in Er{sup 3+}–Tm{sup 3+} codoped fluorotellurite glasses. • Efficient Er{sup 3+}↔Tm{sup 3+} energy transfer in fluorotellurite glasses. • Increase of the red upconversion emission with Tm{sup 3+} concentration due to cross-relaxation processes.

  13. Electric giant resonances in sup 4 sup 0 Ca and sup 4 sup 8 Ca probed with electron and proton scattering coincidence experiments

    CERN Document Server

    Strauch, S

    1999-01-01

    Excitation and particle decay of electric giant resonances in sup 4 sup 0 Ca and sup 4 sup 8 Ca are studied with electron and proton beams. Recent results of a sup 4 sup 8 Ca(e,e'n) measurement performed at the S-DALINAC in Darmstadt with kinematics that selectively populate electric monopole, dipole and quadrupole excitations are presented. The extracted B(E1) strength distribution is in good agreement with photo nuclear data and the predictions of microscopic calculations. The summed B(E2+E0) strength distribution, however disagrees with the result of these calculations. The neutron emission of the giant dipole resonance in sup 4 sup 8 Ca shows a large fraction of direct decay to sup 4 sup 7 Ca hole states. In addition, isoscalar giant monopole resonance strength in sup 4 sup 0 Ca was extracted from (e,e'alpha sub 0) and (e,e'alpha sub 1) angular correlations. A study of the quadrupole strength in the alpha sub 0 decay channel of sup 4 sup 0 Ca with a (p,p'alpha) coincidence measurement reiterates the unsol...

  14. Proton form factor ratio, μpGE<sup>P/GMP> from double spin asymmetry

    Energy Technology Data Exchange (ETDEWEB)

    Habarakada Liyanage, Anusha Pushpakumari [Hampton Univ., Hampton, VA (United States)

    2013-08-01

    The form factors are fundamental properties of the nucleon representing the effect of its structure on its response to electromagnetic probes such as electrons. They are functions of the four-momentum transfer squared Q<sup>2sup> between the electron and the proton. This thesis reports the results of a new measurement of the ratio of the electric and magnetic form factors of the proton up to Q<sup>2sup> = 5.66 (GeV/c)<sup>2sup> using the double spin asymmetry with a polarized beam and target. Experiment E07-003 (SANE, Spin Asymmetries of the Nucleon Experiment) was carried out in Hall C at Jefferson Lab in 2009 to study the proton spin structure functions with a dynamically polarized ammonia target and longitudinally polarized electron beam. By detecting elastically scattered protons in the High-Momentum Spectrometer (HMS) in coincidence with the electrons in the Big Electron Telescope Array (BETA), elastic measurements were carried out in parallel. The elastic double spin asymmetry allows one to extract the proton electric to magnetic form factor ratio G<sup>pE/Gp>M at high-momentum transfer, Q<sup>2sup>= 5.66 (GeV/c)<sup>2sup>. In addition to the coincidence data, inclusively scattered electrons from the polarized ammonia target were detected by HMS, which allows to measure the beam-target asymmetry in the elastic region with the target spin nearly perpendicular to the momentum transfer, and to extract G<sup>pE/Gp>M at low Q<sup>2sup>= 2.06 (GeV/c)<sup>2sup>. This alternative measurement of G<sup>pE/Gp>M has verified and confirmed the dramatic discrepancy at high Q<sup>2sup> between the Rosenbluth and the recoil-polarization-transfer iv method with a different measurement technique and systematic uncertainties uncorrelated to those of the recoil-polarization measurements. The measurement of the form factor ratio at Q<sup>2sup> = 2

  15. Decay of sup 7 sup 6 As

    CERN Document Server

    Camargo, S P D; Medeiros, J A G; Kenchian, G; Cruz, M T F

    1998-01-01

    The level structure of sup 7 sup 6 Se has been investigated by studying the gamma-rays emitted following the beta sup - decay of sup 7 sup 6 As. The energies and relative intensities of 45 gamma-rays have been determined with a better overall precision than previously. Two new transitions with 528.2 and 1232.4 keV have been found and placed in the level scheme. A new level, at 1791.5 keV excitation energy, is proposed. Seven transitions and three levels previously attributed to this decay scheme were not confirmed.

  16. Study of the D{sup 0}p amplitude in Λ{sub b}{sup 0}→D{sup 0}pπ{sup −} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Collaboration: The LHCb collaboration; and others

    2017-05-05

    An amplitude analysis of the decay Λ{sub b}{sup 0}→D{sup 0}pπ{sup −} is performed in the part of the phase space containing resonances in the D{sup 0}p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb{sup −1} of pp collisions recorded by the LHCb experiment. The spectrum of excited Λ{sub c}{sup +} states that decay into D{sup 0}p is studied. The masses, widths and quantum numbers of the Λ{sub c}(2880){sup +} and Λ{sub c}(2940){sup +} resonances are measured. The constraints on the spin and parity for the Λ{sub c}(2940){sup +} state are obtained for the first time. A near-threshold enhancement in the D{sup 0}p amplitude is investigated and found to be consistent with a new resonance, denoted the Λ{sub c}(2860){sup +}, of spin 3/2 and positive parity.

  17. CORRELATION OF {sup 48}Ca, {sup 50}Ti, AND {sup 138}La HETEROGENEITY IN THE ALLENDE REFRACTORY INCLUSIONS

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Hsin-Wei; Lee, Typhoon; Lee, Der-Chuen; Chen, Jiang-Chang, E-mail: hart.chen@bristol.ac.uk [Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, ROC (China)

    2015-06-10

    Precise determinations of {sup 48}Ca anomalies in Allende calcium–aluminum-rich inclusions (CAIs) are reported in this work. There are endemic positive {sup 48}Ca/{sup 44}Ca anomalies in all analyzed CAIs after normalization to {sup 42}Ca/{sup 44}Ca, and it is clearly shown that there is no simple correlation between {sup 48}Ca/{sup 44}Ca and {sup 50}Ti/{sup 48}Ti anomalies, in agreement with Jungck et al. Compared to the {sup 48}Ca/{sup 44}Ca versus {sup 50}Ti/{sup 48}Ti correlation line defined by differentiated meteorites, reported by Chen et al., the CAIs plot to elevated {sup 50}Ti/{sup 48}Ti. Assuming the {sup 48}Ca/{sup 44}Ca anomalies of both CAIs and differentiated meteorites came from the same source, excess {sup 50}Ti anomalies in CAIs can be calculated by subtracting the part associated with {sup 48}Ca/{sup 44}Ca. These excesses show a linear correlation with {sup 138}La anomalies, a neutrino-process nuclide. According to current stellar nucleosynthetic models, we therefore suggest that the solar system {sup 48}Ca, {sup 50}Ti, and {sup 138}La isotopic variations are made of mixtures between grains condensed from ejecta of neutron-rich accretion-induced SNe Ia and the O/Ne–O/C zone of core-collapse SNe II.

  18. Precise calculation of the dilepton invariant-mass spectrum and the decay rate in B{sup {+-}}{yields}{pi}{sup {+-}}{mu}{sup +}{mu}{sup -} in the SM

    Energy Technology Data Exchange (ETDEWEB)

    Ali, Ahmed [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Theory Group; Parkhomenko, Alexander Ya.; Rusov, Aleksey V. [P.G. Demidov Yaroslavl State Univ. (Russian Federation). Dept. of Theoretical Physics

    2013-12-15

    We present a precise calculation of the dilepton invariant-mass spectrum and the decay rate for B{sup {+-}}{yields}{pi}{sup {+-}}l{sup +}l{sup -} (l{sup {+-}}=e{sup {+-}},{mu}{sup {+-}}) in the Standard Model (SM) based on the effective Hamiltonian approach for the b{yields}dl{sup +}l{sup -} transitions. With the Wilson coefficients already known in the next-to-next-to-leading logarithmic (NNLL) accuracy, the remaining theoretical uncertainty in the short-distance contribution resides in the form factors f{sub +}(q{sup 2}), f{sub 0}(q{sup 2}) and f{sub T}(q{sup 2}). Of these, f{sub +}(q{sup 2}) is well measured in the charged-current semileptonic decays B{yields}{pi}l{nu}{sub l} and we use the B-factory data to parametrize it. The corresponding form factors for the B{yields}K transitions have been calculated in the Lattice-QCD approach for large-q{sup 2} and extrapolated to the entire q{sup 2}-region using the so-called z-expansion. Using an SU(3){sub F}-breaking Ansatz, we calculate the B{yields}{pi} tensor form factor, which is consistent with the recently reported lattice B{yields}{pi} analysis obtained at large q{sup 2}. The prediction for the total branching fraction B(B{sup {+-}}{yields}{pi}{sup {+-}}{mu}{sup +}{mu}{sup -})=(1.88{sub +0.32}{sup -0.21}) x 10{sup -8} is in good agreement with the experimental value obtained by the LHCb collaboration. In the low q{sup 2}-region, the Heavy-Quark Symmetry (HQS) relates the three form factors with each other. Accounting for the leading-order symmetry-breaking effects, and using data from the charged-current process B{yields}{pi}l{nu}{sub l} to determine f{sub +}(q{sup 2}), we calculate the dilepton invariant-mass distribution in the low q{sup 2}-region in the B{sup {+-}}{yields}{pi}{sup {+-}}l{sup +}l{sup -} decay. This provides a model-independent and precise calculation of the partial branching ratio for this decay.

  19. {sup 2}H(d,p){sup 3}H and {sup 2}H(d,n){sup 3}He reactions at sub-coulomb energies

    Energy Technology Data Exchange (ETDEWEB)

    Tumino, A.; Spitaleri, C.; Mukhamedzhanov, A. M.; Typel, S.; Sparta, R.; Aliotta, M.; Kroha, V.; Hons, Z.; La Cognata, M.; Lamia, L.; Pizzone, R. G.; Mrazek, J.; Pizzone, R. G.; Rapisarda, G. G.; Romano, S.; Sergi, M. L. [Universita degli Studi di Enna Kore, and Laboratori Nazionali del Sud - INFN, via S. Sofia 62, 95123 Catania (Italy); Dipartimento di Fisica e Astronomia, Universita di Catania, and Laboratori Nazionali del Sud - INFN, via S. Sofia 62, 95123 Catania (Italy); Cyclotron Institute Texas A and M University - College Station, Texas (United States); Excellence Cluster Universe - Technische Universitaet Muenchen, Garching, Germany and GSI Helmholtzzentrum fuer Schwerionenforschung GmbH - Theorie Darmstadt (Germany); Dipartimento di Fisica e Astronomia, Universita di Catania, and Laboratori Nazionali del Sud - INFN, via S. Sofia 62, 95123 Catania (Italy); School of Physics and Astronomy - University of Edinburgh, SUPA (United Kingdom); Nuclear Physics Institute of ASCR - Rez near Prague (Czech Republic); Dipartimento di Fisica e Astronomia, Universita di Catania, and Laboratori Nazionali del Sud - INFN, via S. Sofia 62, 95123 Catania (Italy); Nuclear Physics Institute of ASCR - Rez near Prague (Czech Republic); Dipartimento di Fisica e Astronomia, Universita di Catania, and Laboratori Nazionali del Sud - INFN, via S. Sofia 62, 95123 Catania (Italy)

    2012-11-20

    The {sup 2}H({sup 3}He,p{sup 3}H){sup 1}H and {sup 2}H({sup 3}He,n{sup 3}He){sup 1}H processes have been measured in quasi free kinematics to investigate for the first time the {sup 2}H(d,p){sup 3}H and {sup 2}H(d,n){sup 3}He reactions by means of the Trojan Horse Method. The {sup 3}He+d experiment was performed at 18 MeV, corresponding the a d-d energy range from 1.5 MeV down to 2 keV. This range overlaps with the relevant region for Standard Big Bang Nucleosynthesis as well as with the thermal energies of future fusion reactors and deuterium burning in the Pre Main Sequence phase of stellar evolution. This is the first pioneering experiment in quasi free regime where the charged spectator is detected. Both the energy dependence and the absolute value of the bare nucleus S(E) factors have been extracted for the first time. They deviate by more than 15% from available direct data with new S(0) values of 57.4{+-}1.8 MeVb for {sup 3}H+p and 60.1{+-}1.9 MeVb for {sup 3}He+n. None of the existing fitting curves is able to provide the correct slope of the new data in the full range, thus calling for a revision of the theoretical description. This has consequences in the calculation of the reaction rates with more than a 25% increase at the temperatures of future fusion reactors.

  20. sup 1 sup 2 sup 9 I targets for studies of nuclear waste transmutation

    CERN Document Server

    Ingelbrecht, C; Raptis, K; Altzitzoglou, T; Noguere, G

    2002-01-01

    Nuclear incineration of long-lived fission products and minor actinides is being investigated as an alternative means of reactor waste disposal. sup 1 sup 2 sup 9 I is of particular interest because of its long half-life and high mobility in the environment. Lead iodide targets of sup 1 sup 2 sup 9 I for neutron capture cross-section measurements were prepared from 210 l fuel reprocessing waste solution containing 1.3 g l sup - sup 1 iodine and other fission products. The iodine was separated by oxidation to I sub 2 and extraction into chloroform, reduction to iodide by sodium sulphite and re-extraction into an aqueous phase. Iodide was precipitated using lead nitrate and dried. The chemistry was carried out batch-wise using 400 ml starting solution each time and recycling the chloroform. An extraction efficiency of about 90%, determined by gamma-ray spectrometry, was achieved.

  1. Search for spinless bosons in e/sup +/e/sup -/ annihilation

    Energy Technology Data Exchange (ETDEWEB)

    Althoff, M; Braunschweig, W; Kirschfink, F J; Martyn, H U; Rosskamp, R; Schmitz, D; Siebke, H; Wallraff, W; Eisenmann, J; Fischer, H M

    1985-04-25

    We have measured the cross sections for e/sup +/e/sup -/ -> e/sup +/e/sup -/, e/sup +/e/sup -/ ->..mu../sup +/..mu../sup -/, e/sup +/e/sup -/ -> ..gamma gamma.. and e/sup +/e/sup -/ -> hadrons in an energy scan at center of mass energies between 39.79 and 46.72 GeV in 30 MeV steps. New spinless bosons, whose existence has been postulated as a possible means to explain the anomalously large radiative width of the Z/sup 0/ found at the CERN SPS p anti p collider, are rouled out in the scan region. The data are used to set limits on the couplings to lepton, photon and quark pairs of bosons with masses above 46.72 GeV.

  2. A Search for Higher Twist Effects in the Neutron Spin Structure Function g<sup>n>2(x,Q<sup>2sup>)

    Energy Technology Data Exchange (ETDEWEB)

    Kramer, Kevin [College of William and Mary, Williamsburg, VA (United States)

    2003-08-01

    Jefferson Lab experiment E97-103 measured the spin structure function g<sup>n>2(x,Q<sup>2sup>) from a Q<sup>2sup> of 0.58 to 1.36 with a nearly constant x of 0.2. Combining this data with a fit to the world g<sup>n>1 data, the size of higher twist contributions to the spin structure functions can be extracted using the Wandzura-Wilczek relation. These higher twist contributions result from quark-gluon correlations and are expected to be larger as Q<sup>2sup> decreases. This experiment was performed in Hall A with a longitudinally polarized electron beam and a high density polarized <sup>3sup>He target. The physics motivation and an overview of the experiment will be presented.

  3. Search for light vector boson production in e{sup +}e{sup −}→μ{sup +}μ{sup −}γ interactions with the KLOE experiment

    Energy Technology Data Exchange (ETDEWEB)

    Babusci, D. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Balwierz-Pytko, I. [Institute of Physics, Jagiellonian University, Cracow (Poland); Bencivenni, G.; Bloise, C.; Bossi, F. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Branchini, P. [INFN Sezione di Roma Tre, Roma (Italy); Budano, A. [Dipartimento di Matematica e Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Caldeira Balkeståhl, L. [Department of Physics and Astronomy, Uppsala University, Uppsala (Sweden); Ceradini, F. [Dipartimento di Matematica e Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Ciambrone, P. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Curciarello, F., E-mail: fcurciarello@unime.it [Dipartimento di Fisica e Scienze della Terra dell' Università di Messina, Messina (Italy); INFN Sezione di Catania, Catania (Italy); Czerwiński, E. [Institute of Physics, Jagiellonian University, Cracow (Poland); Danè, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Leo, V. [Dipartimento di Fisica e Scienze della Terra dell' Università di Messina, Messina (Italy); INFN Sezione di Catania, Catania (Italy); De Lucia, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Robertis, G. [INFN Sezione di Bari, Bari (Italy); De Santis, A.; De Simone, P. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Di Cicco, A. [Dipartimento di Matematica e Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); and others

    2014-09-07

    We have searched for a light vector boson U, the possible carrier of a “dark force”, with the KLOE detector at the DAΦNE e{sup +}e{sup −} collider, motivated by astrophysical evidence for the presence of dark matter in the Universe. Using e{sup +}e{sup −} collisions collected with an integrated luminosity of 239.3 pb{sup −1}, we look for a dimuon mass peak in the reaction e{sup +}e{sup −}→μ{sup +}μ{sup −}γ, corresponding to the decay U→μ{sup +}μ{sup −}. We find no evidence for a U vector boson signal. We set a 90% CL upper limit for the mixing parameter squared between the photon and the U boson of 1.6×10{sup −5} to 8.6×10{sup −7} for the mass region 520

  4. About the reactions sup 3 H(alpha,gamma) sup 7 Li and sup 3 He(alpha,gamma) sup 7 Be

    CERN Document Server

    Loeffler, W

    1993-01-01

    In this article the current experimental and theoretical status of the radiative alpha capture reactions sup 3 H(alpha,gamma) sup 7 Li and sup 3 He(alpha,gamma) sup 7 Be and their relations to primordial nucleosynthesis and the solar neutrino problem are reviewed. (author)

  5. NMR shielding and spin–rotation constants of {sup 175}LuX (X = {sup 19}F, {sup 35}Cl, {sup 79}Br, {sup 127}I) molecules

    Energy Technology Data Exchange (ETDEWEB)

    Demissie, Taye B. [Centre for Theoretical and Computational Chemistry Department of Chemistry, UiT – The Arctic University of Norway, N-9037 Tromsø (Norway)

    2015-12-31

    This presentation demonstrates the relativistic effects on the spin-rotation constants, absolute nuclear magnetic resonance (NMR) shielding constants and shielding spans of {sup 175}LuX (X = {sup 19}F, {sup 35}Cl, {sup 79}Br, {sup 127}I) molecules. The results are obtained from calculations performed using density functional theory (non-relativistic and four-component relativistic) and coupled-cluster calculations. The spin-rotation constants are compared with available experimental values. In most of the molecules studied, relativistic effects make an order of magnitude difference on the NMR absolute shielding constants.

  6. Double diffractive {rho} -production in {gamma}{sup *}{gamma}{sup *} collisions

    Energy Technology Data Exchange (ETDEWEB)

    Pire, B. [Ecole Polytechnique, CPHT, Palaiseau (France); Szymanowski, L. [Soltan Institute for Nuclear Studies, Warsaw (Poland); Universite de Liege, Liege (Belgium); Wallon, S. [Universite Paris-Sud, LPT, Orsay (France)

    2005-12-01

    We present a first estimate of the cross-section for the exclusive process {gamma}{sup *}{sub L}(Q{sub 1}{sup 2}){gamma}{sup *}{sub L}(Q{sub 2}{sup 2}){yields}{rho}{sub L}{sup 0}{rho}{sub L}{sup 0}, which will be studied in the future high energy e{sup +} e{sup -}-linear collider. As a first step, we calculate the Born order approximation of the amplitude for longitudinally polarized virtual photons and mesons, in the kinematical region s >>-t, Q{sub 1}{sup 2}, Q{sub 2}{sup 2}. This process is completely calculable in the hard region Q{sub 1}{sup 2}, Q{sub 2}{sup 2}>>{lambda}{sup 2}{sub QCD}. We perform most of the steps in an analytical way. The resulting cross-section turns out to be large enough for this process to be measurable with foreseen luminosity and energy, for Q{sub 1}{sup 2} and Q{sub 2}{sup 2} in the range of a few GeV{sup 2}. (orig.)

  7. Distribution of radioactive pollution of {sup 238}U, {sup 232}Th, {sup 40}K and {sup 137}Cs in northwestern coasts of Persian Gulf, Iran

    Energy Technology Data Exchange (ETDEWEB)

    Reza Abdi, Mohammad [Department of Physics, University of Isfahan, Isfahan 81747-73441 (Iran, Islamic Republic of)], E-mail: r.abdi@phys.ui.ac.ir; Kamali, Mehdi [Central Laboratory, University of Isfahan, Isfahan 81747-73441 (Iran, Islamic Republic of); Vaezifar, Sedigheh [Department of Chemistry, University of Isfahan, Isfahan 81747-73441 (Iran, Islamic Republic of)

    2008-04-15

    A reconnaissance study has been made of the distribution of {sup 238}U, {sup 232}Th, {sup 40}K and {sup 137}Cs and geochemical features in soils and sediments samples at various locations in the northwestern coast of Persian Gulf. Activity concentration levels due to radionuclides were measured in 30 soil and sediment samples collected from this region. From the measured spectra, activity concentrations were determined for {sup 40}K (range from 146 to 500 Bq kg{sup -1}), {sup 137}Cs (from 5 to 20 Bq kg{sup -1}), {sup 238}U (from 21 to 65 Bq kg{sup -1}) and {sup 232}Th (from 15 to 45 Bq kg{sup -1}) with lowest limit detection (LLD) of 68, 3.2, 4.3 and 4.3 Bq kg{sup -1}, respectively. The dose rate from ambient air at the soil ranges was between 19 and 58 nGy h{sup -1} with an average of 37.41 {+-} 9.66 nGy h{sup -1}.

  8. Measuring the radium quartet ({sup 228}Ra, {sup 226}Ra, {sup 224}Ra, {sup 223}Ra) in seawater samples using gamma spectrometry

    Energy Technology Data Exchange (ETDEWEB)

    Beek, P. van, E-mail: vanbeek@legos.obs-mip.f [LEGOS, Laboratoire d' Etudes en Geophysique et Oceanographie Spatiales (CNRS/CNES/IRD/UPS), Observatoire Midi Pyrenees, 14 Avenue Edouard Belin, 31400 Toulouse (France); Souhaut, M. [LEGOS, Laboratoire d' Etudes en Geophysique et Oceanographie Spatiales (CNRS/CNES/IRD/UPS), Observatoire Midi Pyrenees, 14 Avenue Edouard Belin, 31400 Toulouse (France); Reyss, J.-L. [LSCE, Laboratoire des Sciences du Climat et de l' Environnement (CNRS/CEA/UVSQ), Avenue de la Terrasse, 91198 Gif-sur-Yvette (France)

    2010-07-15

    Radium isotopes are widely used in marine studies (eg. to trace water masses, to quantify mixing processes or to study submarine groundwater discharge). While {sup 228}Ra and {sup 226}Ra are usually measured using gamma spectrometry, short-lived Ra isotopes ({sup 224}Ra and {sup 223}Ra) are usually measured using a Radium Delayed Coincidence Counter (RaDeCC). Here we show that the four radium isotopes can be analyzed using gamma spectrometry. We report {sup 226}Ra, {sup 228}Ra, {sup 224}Ra, {sup 223}Ra activities measured using low-background gamma spectrometry in standard samples, in water samples collected in the vicinity of our laboratory (La Palme and Vaccares lagoons, France) but also in seawater samples collected in the plume of the Amazon river, off French Guyana (AMANDES project). The {sup 223}Ra and {sup 224}Ra activities determined in these samples using gamma spectrometry were compared to the activities determined using RaDeCC. Activities determined using the two techniques are in good agreement. Uncertainties associated with the {sup 224}Ra activities are similar for the two techniques. RaDeCC is more sensitive for the detection of low {sup 223}Ra activities. Gamma spectrometry thus constitutes an alternate method for the determination of short-lived Ra isotopes.

  9. Study of B{sup {+-}} {yields} K{sup {+-}}{pi}{sup 0} and B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup 0} decay modes with the BABAR detector and constraints from B {yields} {pi}{pi}, K{pi}, KK modes on the CKM matrix; Etude des desintegrations B{sup {+-}} {yields} K{sup {+-}}{pi}{sup 0} et B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup 0} avec le detecteur BABAR et contraintes des modes B {yields} {pi}{pi}, K{pi}, KK sur la matrice CKM

    Energy Technology Data Exchange (ETDEWEB)

    Malcles, J

    2006-04-15

    The analysis of B{sup {+-}} {yields} pi{sup {+-}}{pi}{sup 0} and B{sup {+-}} {yields} K{sup {+-}}{pi}{sup 0} modes has been done with a sample of 227 millions of B pairs corresponding to 205 fb{sup -1} of data collected between october 1999 and july 2004 with the BABAR detector. The branching ratios and CP asymmetries obtained are: Br({pi}{pi}{sup 0}) = (5.57 {+-} 0.60 {+-} 0.33)*10{sup -6}; Br(K{pi}{sup 0}) (11.50 {+-} 0.65 {+-} 0.57)*10{sup -6}; A({pi}{pi}{sup 0}) = (-0.007 {+-} 0.104 {+-} 0.023); and A(K{pi}{sup 0}) = (0.066 {+-} 0.055 {+-} 0.010). The constraints on the angle alpha of the unitarity triangle have been derived from the isospin analysis of B {yields} {pi}{pi} modes. The isospin symmetry has also been used to relate B {yields} K{pi} modes in order to constraint the CKM matrix. More significant constraints have been obtained with the SU(3) symmetry for B, Bs {yields} {pi}{pi}/ K{pi}/ KK modes. They are in good agreement with the Standard CKM fit. It has been shown that such an analysis will be competitive with the Standard CKM fit in the future and will allow to determine SU(3) breaking or New Physics parameters from data. (author)

  10. Autoionization spectra of He excited by fast (MeV) H/sup +/, He/sup +/, and Li/sup n//sup +/ (N = 1,2,3) ions

    Energy Technology Data Exchange (ETDEWEB)

    Schneider, D.; Arcuni, P.; Bruch, P.; Stoeffler, W.

    1983-01-01

    Autoionization spectra of He following excitation by 1 to 3 MeV H/sup +/, He/sup +/, and Li/sup n//sup +/ (n = 1,2,3) have been measured as a function of observation angle. The (2p/sup 2/)/sup 1/D and (2s2p)/sup 1/P resonances have been examined and a strong dependence on projectile velocities, charge state and observation angle was found. The measurements were performed in a crossed-beam scattering chamber. The target-gas pressure was in the order of 10/sup -4/ Torr. The secondary electrons have been energy analyzed by a 45/sup 0/ parallel-plate analyzer. Results are presented and discussed. (WHK)

  11. Measurement of Neutral B Decay Branching Fractions to K{sub s}{sup 0}{pi}{sup +}{pi}{sup -} Final States

    Energy Technology Data Exchange (ETDEWEB)

    Olaiya, E

    2004-08-13

    The branching fractions for B{sup 0} --> K{sup 0}{pi}{sup +}{pi}{sup -}, B{sup 0} --> K*{sup +}{pi}{sup -} and B{sup 0} --> D{sup -}(--> K{sub s}{sup 0}{pi}{sup -}){pi}{sup +} decaying to a K{sub s}{sup 0}{pi}{sup +}{pi}{sup -} state have been measured and agree with previous measurements. The direct CP violating parameter A{sub K*{pi}} was measured for the decay B{sup 0} --> K*{sup +}{pi}{sup -} and is in agreement with the CLEO measurement, with no evidence of CP violation with the statistics used. Using larger datasets, one can extract amplitudes and relative phases of the resonant contributions to the Dalitz plot, with the possibility to observe new B-meson decays.

  12. Measurement of D{sup *{+-}} meson production and determination of F{sup c} {sup anti} {sup c}{sub 2} at low Q{sup 2} in deep-inelastic scattering at HERA

    Energy Technology Data Exchange (ETDEWEB)

    Aaron, F.D. [National Institute for Physics and Nuclear Engineering (NIPNE), Bucharest (Romania); Bucharest Univ. (Romania). Faculty of Physics; Alexa, C. [National Institute for Physics and Nuclear Engineering (NIPNE), Bucharest (Romania); Andreev, V. [Lebedev Physical Institute, Moscow (RU)] (and others)

    2011-04-15

    Inclusive production of D{sup *} mesons in deep-inelastic ep scattering at HERA is studied in the range 5 sup 2}<100 GeV{sup 2} of the photon virtuality and 0.02sup *} meson is p{sub T}(D{sup *}) >1.25 GeV and vertical stroke {eta}(D{sup *}) vertical stroke <1.8. The data sample corresponds to an integrated luminosity of 348 pb{sup -1} collected with the H1 detector. Single and double differential cross sections are measured and the charm contribution F{sup c} {sup anti} {sup c}{sub 2} to the proton structure function F{sub 2} is determined. The results are compared to perturbative QCD predictions at next-to-leading order implementing different schemes for the charm mass treatment and with Monte Carlo models based on leading order matrix elements with parton showers. (orig.)

  13. Measurement of D{sup *{+-}} meson production and determination of F{sub 2}{sup c} {sup anti} {sup c} at low Q{sup 2} in deep-inelastic scattering at HERA

    Energy Technology Data Exchange (ETDEWEB)

    Aaron, F.D.; Alexa, C.; Rotaru, M.; Stoicea, G. [National Inst. for Physics and Nuclear Engineering, Bucharest (Romania); Andreev, V.; Belousov, A.; Eliseev, A.; Fomenko, A.; Gogitidze, N.; Lebedev, A.; Malinovski, E.; Rusakov, S.; Shtarkov, L.N.; Soloviev, Y.; Vazdik, Y. [Lebedev Physical Inst., Moscow (Russian Federation); Backovic, S.; Dubak, A.; Lastovicka-Medin, G.; Picuric, I.; Raicevic, N. [Univ. of Montenegro, Podgorica (ME); Baghdasaryan, A.; Baghdasaryan, S.; Zohrabyan, H. [Yerevan Physics Inst. (Armenia); Barrelet, E. [Univ. Pierre et Marie Curie Paris 6, Univ. Denis Diderot Paris 7, CNRS/IN2P3, LPNHE, Paris (France); Bartel, W.; Belov, P.; Brandt, G.; Brinkmann, M.; Britzger, D.; Campbell, A.J.; Eckerlin, G.; Elsen, E.; Felst, R.; Fischer, D.J.; Fleischer, M.; Gayler, J.; Ghazaryan, S.; Glazov, A.; Gouzevitch, M.; Grebenyuk, A.; Grell, B.R.; Habib, S.; Haidt, D.; Helebrant, C.; Kleinwort, C.; Kogler, R.; Kraemer, M.; Levonian, S.; Lipka, K.; List, J.; Meyer, A.B.; Meyer, J.; Niebuhr, C.; Nowak, K.; Olsson, J.E.; Pahl, P.; Panagoulias, I.; Papadopoulou, T.; Petrukhin, A.; Piec, S.; Pitzl, D.; Schmitt, S.; Sefkow, F.; South, D.; Staykova, Z.; Steder, M.; Toll, T.; Wuensch, E. [DESY, Hamburg (Germany); Begzsuren, K.; Ravdandorj, T.; Tseepeldorj, B. [Inst. of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar (Mongolia); Bizot, J.C.; Brisson, V.; Delcourt, B.; Jacquet, M.; Pascaud, C.; Tran, T.H.; Zhang, Z.; Zomer, F. [Univ. Paris-Sud, CNRS/IN2P3,LAL, Orsay (France); Boenig, M.O.; Wegener, D. [TU Dortmund, Inst. fuer Physik, Dortmund (Germany); Boudry, V.; Moreau, F.; Specka, A. [Ecole Polytechnique, CNRS/IN2P3, LLR, Palaiseau (France); Bozovic-Jelisavcic, I.; Mudrinic, M.; Pandurovic, M.; Smiljanic, I. [Univ. of Belgrade (RS); Bracinik, J.; Kenyon, I.R.; Newman, P.R.; Thompson, P.D. [Univ. of Birmingham (United Kingdom); Bruncko, D.; Cerny, V.; Ferencei, J. [Slovak Academy of Sciences, Kosice (Slovakia)] [and others

    2011-10-15

    Inclusive production of D{sup *} mesons in deep-inelastic ep scattering at HERA is studied in the range 5sup 2}<100 GeV{sup 2} of the photon virtuality and 0.02sup *} meson is p{sub T}(D{sup *}) >1.25 GeV and vertical stroke {eta}(D{sup *}) vertical stroke <1.8. The data sample corresponds to an integrated luminosity of 348 pb {sup -1} collected with the H1 detector. Single and double differential cross sections are measured and the charm contribution F{sub 2}{sup c} {sup anti} {sup c} to the proton structure function F{sub 2} is determined. The results are compared to perturbative QCD predictions at next-to-leading order implementing different schemes for the charm mass treatment and with Monte Carlo models based on leading order matrix elements with parton showers. (orig.)

  14. Lifetime of the first excited 2{sup +} state in {sup 172}Hf and {sup 174}Hf

    Energy Technology Data Exchange (ETDEWEB)

    Gerst, Rosa-Belle; Stegemann, Simon; Jolie, Jan; Regis, Jean-Marc; Rudigier, Matthias; Saed-Samii, Nima; Zell, Karl Oskar [Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Str. 77, 50937 Koeln (Germany)

    2014-07-01

    Using the {sup 170}Yb(α,2n) and {sup 172}Yb(α,2n) reactions the lifetimes of the first excited 2{sup +} state in {sup 172}Hf and {sup 174}Hf have been measured in fast-timing experiments using the Cologne Orange-Spectrometer and 6 LaBr{sub 3}(Ce)-Detectors. The lifetimes were obtained analyzing e{sup -}-γ-coincidence time-spectra with the slope method. The new and more precise lifetimes correct existing, outdated lifetimes in nuclear databases. Additionally, the systematics of the B(E2,2{sub 1}{sup +}→0{sub 1}{sup +}) is studied.

  15. Single photon emission in electron-positron colliding beam reaction e/sup +/e/sup -/. -->. u/sup +/u/sup -/. [Total cross section, current conservation, hard-proton correction

    Energy Technology Data Exchange (ETDEWEB)

    Hayashi, M [Saitama Medical College (Japan)

    1974-01-01

    We evaluate the energy spectrum of the photons emitted in the reaction e/sup +/e/sup -/ ..-->.. ..mu../sup +/..mu../sup -/..gamma.., and the hard photon correction to the total cross-section of the reaction e/sup +/e/sup -/ ..-->.. ..mu../sup +/..mu../sup -/. We develop a simple technique based on the analytical QED formulae, in particular, on the current conservation.

  16. The evaluation and calculation of production cross sections of {sup 18}F, {sup 77}Br and {sup 186}Re medical radioisotopes from {sup 18}O, {sup 77}Se and {sup 186}W(p,n) reactions up to 80 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Youxiang, Zhuang [Chinese Nuclear Data Center, Beijing, BJ (China)

    1996-06-01

    The medical radioisotopes are used for diagnostic and therapeutic purposes, as well as metabolism and physiological function researches in modern medicine. The major applications are of functional imaging using PET agents for {sup 18}F, various therapeutic pharmaceuticals via auger electrons for {sup 77}Br, cancers diagnosis and therapy for {sup 186}Re. The evaluations of experimental data and theoretical calculations for {sup 18}O, {sup 77}Se, {sup 187}W(p,n) reactions up to 80 MeV are presented and analysed. The recommended values for {sup 18}O(p,n){sup 18}F, {sup 77}Se(p,n){sup 77}Br and {sup 186}W(p,n){sup 186}Re reaction cross sections are given. (6 figs.).

  17. Applications of /sup 43/Ca, /sup 25/Mg, and /sup 67/Zn NMR spectroscopies to biological systems

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, Tohru; Hatano, Masahiro [Tohoku Univ., Sendai (Japan). Chemical Research Inst. of Non-Aqueous Solutions

    1983-12-01

    /sup 43/Ca, /sup 25/Mg and /sup 67/Zn NMR spectroscopies applied to biologically important systems are summarized mainly on the basis of our findings. It was found from our studies that (1) /sup 25/Mg NMR can be utilized for studying the dynamic and/or static behavior of Mg/sup 2 +/ in the Mg/sup 2 +/ -ATP (ADP)-kinase ternary complexes and (2) /sup 67/Zn NMR bands of diluted Zn/sup 2 +/ are much narrower than predicted and thus can be applicable for studying the dynamic and/or static behavior of Zn/sup 2 +/ in Zn/sup 2 +/ -enzyme solutions. In addition, /sup 43/Ca NMR spectra were successfully applied to some Ca/sup 2 +/ -binding proteins. In concluding remarks, we discussed possibilities of applications of those metal NMR spectroscopies to medical purposes.

  18. Study of the Higgs boson discovery potential in the process pp{yields}H/A{yields}{mu}{sup +}{mu}{sup -}/{tau}{sup +}{tau}{sup -} with the ATLAS detector

    Energy Technology Data Exchange (ETDEWEB)

    Dedes, Georgios

    2008-04-22

    In this thesis, the discovery potential of the ATLAS experiment at the Large Hadron Collider (LHC) at CERN for the heavy neutral Higgs bosons H/A of theMinimal Supersymmetric extension of the Standard Model of particle physics (MSSM) in the decay channels H/A{yields}{tau}{sup +}{tau}{sup -}{yields}e/{mu}+X and H/A{yields}{mu}{sup +}{mu}{sup -} has been studied. The ATLAS detector is designed to study the full spectrum of the physics phenomena occuring in the proton-proton collisions at 14 TeV center-of-mass energy and to provide answers to the question of the origin of particle masses and of electroweak symmetry breaking. For the studies, the ATLAS muon spectrometer plays an important role. The spectrometer allows for a precise muon momentum measurement independently of other ATLAS subdetectors. The performance of the muon spectrometer depends strongly on the performance of the muon tracking detectors, the Monitored Drift Tube Chambers (MDT). Computer programs have been developed in order to test and verify the ATLAS muon spectrometer simulation, an essential ingredient for data analysis. In addition, dedicated programs for the monitoring of the quality of the data collected by the muon spectrometer have been developed and tested with data from cosmic ray muons. High-quality cosmic ray muon data have been used for the calibration of the MDT-chambers. A new calibration method, called analytical autocalibration, has been tested. The proposed method achieved the required accuracy of 20 {mu}m in the determination of the space-to-drift-time relationship of the drift tubes of the MDT chambers with only 2000 muon tracks per chamber. Reliable muon detector simulation and calibration are essential for the study of the MSSM Higgs boson decays H/A{yields}{tau}{sup +}{tau}{sup -}{yields}e/{mu}+X and H/A{yields}{mu}{sup +}{mu}{sup -} and of the corresponding background processes. The signal selection and background rejection requirements have been optimized for maximum signal

  19. Neutron energy spectra of sup 2 sup 5 sup 2 Cf, Am-Be source and of the D(d,n) sup 3 He reaction

    CERN Document Server

    Sang Tae Park

    2003-01-01

    The neutron energy spectrum of the following sources were measured using a fast neutron spectrometer with the NE-213 liquid scintillator: sup 2 sup 5 sup 2 Cf, Am-Be and D(d,n) sup 3 He reaction from a 3 MeV Pelletron accelerator in Tokyo Institute of Technology. The measured proton recoil pulse height data of sup 2 sup 5 sup 2 Cf, Am-Be and D(d,n) sup 3 He were unfolded using the mathematical program to obtain the neutron energy spectrum. The sup 2 sup 5 sup 2 Cf and Am-Be neutron energy spectra were measured and the results obtained showed a good agreement with the spectra usually published in the literature. The neutron energy spectrum from D(d,n) sup 3 He was measured and the results obtained also showed a good agreement with the calculation by time of flight (TOF) methods. (author)

  20. Measurement of {sup 1}H-{sup 15}N and {sup 1}H-{sup 13}C residual dipolar couplings in nucleic acids from TROSY intensities

    Energy Technology Data Exchange (ETDEWEB)

    Ying Jinfa [National Institutes of Health, Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases (United States); Wang Jinbu [National Cancer Institute, National Institutes of Health, Structural Biophysics Laboratory (United States); Grishaev, Alex [National Institutes of Health, Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases (United States); Yu Ping; Wang Yunxing [National Cancer Institute, National Institutes of Health, Structural Biophysics Laboratory (United States); Bax, Ad, E-mail: bax@nih.gov [National Institutes of Health, Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases (United States)

    2011-09-15

    Analogous to the recently introduced ARTSY method for measurement of one-bond {sup 1}H-{sup 15}N residual dipolar couplings (RDCs) in large perdeuterated proteins, we introduce methods for measurement of base {sup 13}C-{sup 1}H and {sup 15}N-{sup 1}H RDCs in protonated nucleic acids. Measurements are based on quantitative analysis of intensities in {sup 1}H-{sup 15}N and {sup 13}C-{sup 1}H TROSY-HSQC spectra, and are illustrated for a 71-nucleotide adenine riboswitch. Results compare favorably with those of conventional frequency-based measurements in terms of completeness and convenience of use. The ARTSY method derives the size of the coupling from the ratio of intensities observed in two TROSY-HSQC spectra recorded with different dephasing delays, thereby minimizing potential resonance overlap problems. Precision of the RDC measurements is limited by the signal-to-noise ratio, S/N, achievable in the 2D TROSY-HSQC reference spectrum, and is approximately given by 30/(S/N) Hz for {sup 15}N-{sup 1}H and 65/(S/N) Hz for {sup 13}C-{sup 1}H. The signal-to-noise ratio of both {sup 1}H-{sup 15}N and {sup 1}H-{sup 13}C spectra greatly benefits when water magnetization during the experiments is not perturbed, such that rapid magnetization transfer from bulk water to the nucleic acid, mediated by rapid amino and hydroxyl hydrogen exchange coupled with {sup 1}H-{sup 1}H NOE transfer, allows for fast repetition of the experiment. RDCs in the mutated helix 1 of the riboswitch are compatible with nucleotide-specifically modeled, idealized A-form geometry and a static orientation relative to the helix 2/3 pair, which differs by ca 6 Degree-Sign relative to the X-ray structure of the native riboswitch.

  1. {sup 17}O({alpha},{gamma}){sup 21}Ne and {sup 17}O({alpha},n){sup 20}Ne for the weak s process

    Energy Technology Data Exchange (ETDEWEB)

    Best, A.; Goerres, J.; Beard, M.; Couder, M.; Boer, R. de; Falahat, S.; Gueray, R. T.; Kontos, A.; Kratz, K.-L.; LeBlanc, P. J.; Li, Q.; O' Brien, S.; Oezkan, N.; Pignatari, M.; Sonnabend, K.; Talwar, R.; Tan, W.; Uberseder, E.; Wiescher, M. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States) and Department for Biogeochemistry, Max-Planck-Institute for Chemistry, 55020 Mainz (Germany); Department of Physics, Kacaeli University, Umuttepe 41380, Kocaeli (Turkey); Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Department for Biogeochemistry, Max-Planck-Institute for Chemistry, 55020 Mainz (Germany); Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Department of Physics, Kacaeli University, Umuttepe 41380, Kocaeli (Turkey); Department of Physics, University of Basel, Basel 4056 (Switzerland); Institute for Applied Physics, Goethe-University Frankfurt, 60325 Frankfurt (Germany); Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)

    2012-11-20

    The ratio of the reaction rates of the competing channels {sup 17}O({alpha}{gamma}){sup 21}Ne and {sup 17}O({alpha},n){sup 20}Ne determines the efficiency of {sup 16}O as a neutron poison in the s process in low metallicity rotating stars. It has a large impact on the element production, either producing elements to the mass range of A=90 in case of a significant poisoning effect or extending the mass range up to the region of A=150 if the {gamma} channel is of negligible strength. We present an improved study of the reaction {sup 17}O({alpha},n){sup 20}Ne, including an independent measurement of the {sup 17}O({alpha},n{sub 1}){sup 20}Ne channel. A simultaneous R-Matrix fit to both the n{sub 0} and the n{sub 1} channels has been performed. New reaction rates, including recent data on the {sup 17}O({alpha},{gamma}){sup 21}Ne reaction, have been calculated and used as input for stellar network calculations and their impact on the s process in rotating massive stars is discussed.

  2. Optical emissions from the dissociative recombination of N{sub 2}H{sup +}, HCO{sup +}, HOC{sup +}, and HNC{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Johnsen, R [Department of Physics and Astronomy University of Pittsburgh, Pittsburgh, PA 15260 (United States); Golde, M F [Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260 (United States); Rosati, R E [Smithsonian Astrophysical Observatory, 60 Garden St. MS-50 Cambridge, MA, 02138 (United States); Pappas, D [Army Research Laboratory, 4600 Deer Creek Loop, Aberdeen Proving Ground, MD (United States); Skrzypkowski, M P, E-mail: rj@pitt.ed [Prometheus Energy Company, 3311 S. 120th Place Suite 100, Seattle, WA 98168 (United States)

    2009-11-15

    We present recent flowing-afterglow measurements of branching fractions for electronically and vibrationally excited products arising from the dissociative recombination of N{sub 2}H{sup +}, HCO{sup +}, HOC{sup +}, and HNC{sup +} ions with thermal electrons. State-specific yields were derived by fitting the observed, spatially resolved emission band intensities to models that simulate all ion-chemical processes, recombination, diffusion, and gas mixing.

  3. Measurement of the effective B{sub s}{sup 0}→J/ψK{sub S}{sup 0} lifetime

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J. [Fakultät Physik, Technische Universität Dortmund, Dortmund (Germany); Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amerio, S. [Sezione INFN di Padova, Padova (Italy); Amhis, Y. [LAL, Université Paris-Sud, CNRS/IN2P3, Orsay (France); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Andreassen, R. [University of Cincinnati, Cincinnati, OH (United States); and others

    2013-08-11

    This paper reports the first measurement of the effective B{sub s}{sup 0}→J/ψK{sub S}{sup 0} lifetime and an updated measurement of its time-integrated branching fraction. Both measurements are performed with a data sample, corresponding to an integrated luminosity of 1.0 fb{sup −1} of pp collisions, recorded by the LHCb experiment in 2011 at a centre-of-mass energy of 7 TeV. The results are: τ{sub J/ψK{sub S{sup 0eff}}}=1.75±0.12(stat)±0.07(syst) ps and B(B{sub s}{sup 0}→J/ψK{sub S}{sup 0})=(1.97±0.23)×10{sup −5}. For the latter measurement, the uncertainty includes both statistical and systematic sources.

  4. Scraping beam halo in {mu} {sup +} {mu} {sup minus} colliders

    Energy Technology Data Exchange (ETDEWEB)

    Drozhdin, A.; Mokhov, N.; Johnstone, C.; Wan, W.; Garren, A.

    1998-01-01

    Beam halo scraping schemes have been explored in the 50 x 50 GeV and 2 x 2 TeV {mu}{sup +}{mu}{sup -} colliders using both absorbers and electrostatic deflectors. Utility sections have been specially designed into the rings for scraping. Results of realistic STRUCT- MARS Monte-Carlo simulations show that for the low-energy machine a scheme with a 5 m long steel absorber suppresses losses in the interaction region by three orders of magnitude. The same scraping efficiency at 2 TeV is achieved only by complete extraction of beam halo from the machine. The effect of beam-induced power dissipation in the collider superconducting magnets and detector backgrounds is shown both for the first few turns after injection and for the rest of the cycle.

  5. Measurement of the absolute branching ratio of the K{sup +}→π{sup +}π{sup −}π{sup +}(γ) decay with the KLOE detector

    Energy Technology Data Exchange (ETDEWEB)

    Babusci, D. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Balwierz-Pytko, I. [Institute of Physics, Jagiellonian University, Cracow (Poland); Bencivenni, G.; Bloise, C.; Bossi, F. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Branchini, P. [INFN Sezione di Roma Tre, Roma (Italy); Budano, A. [Dipartimento di Matematica e Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Caldeira Balkeståhl, L. [Department of Physics and Astronomy, Uppsala University, Uppsala (Sweden); Ceradini, F. [Dipartimento di Matematica e Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); Ciambrone, P. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Curciarello, F. [Dipartimento di Fisica e Scienze della Terra dell' Università di Messina, Messina (Italy); INFN Sezione di Catania, Catania (Italy); Czerwiński, E. [Institute of Physics, Jagiellonian University, Cracow (Poland); Danè, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Leo, V. [Dipartimento di Fisica e Scienze della Terra dell' Università di Messina, Messina (Italy); INFN Sezione di Catania, Catania (Italy); De Lucia, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Robertis, G. [INFN Sezione di Bari, Bari (Italy); De Santis, A. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Simone, P., E-mail: patrizia.desimone@lnf.infn.it [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Di Cicco, A. [Dipartimento di Matematica e Fisica dell' Università “Roma Tre”, Roma (Italy); INFN Sezione di Roma Tre, Roma (Italy); and others

    2014-11-10

    The absolute branching ratio of the K{sup +}→π{sup +}π{sup −}π{sup +}(γ) decay, inclusive of final-state radiation, has been measured using ∼17 million tagged K{sup +} mesons collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory. The result is: BR(K{sup +}→π{sup +}π{sup −}π{sup +}(γ))=0.05565±0.00031{sub stat}±0.00025{sub syst} a factor ≃ 5 more precise with respect to the previous result. This work completes the program of precision measurements of the dominant kaon branching ratios at KLOE.

  6. Affinity of /sup 169/Yb, /sup 67/Ga and /sup 111/In for malignant tumor. II. Comparison of tumor affinity among /sup 169/Yb, /sup 67/Ga, and /sup 111/In

    Energy Technology Data Exchange (ETDEWEB)

    Ando, I [Kanazawa Univ. (Japan). School of Medicine

    1975-10-01

    Comparisons of biological behavior of /sup 169/Yb-citrate and /sup 111/In-citrate and /sup 67/Ga-citrate in tumor tissue were performed by macro-autoradiography as well as by subcellular fractionation according to the method of Hogeboom and Schneider, using Yoshida sarcoma-bearing rats and Ehrlich tumor-bearing mice. The uptake of /sup 169/Yb, /sup 67/Ga and /sup 111/In into the tumor and various organs was assayed at 10, 30, 60 and 120 minutes after intravenous injection, using the rats subcutaneously transplanted with Yoshida sarcoma. Autoradiographical findings showed that the uptake of these nuclides was predominant in viable tumor tissue rather than in necrotic tumor tissue. Among subcellular fractions of Ehrlich tumor, most of the radioactivity was localized in the supernatant fraction and a small amount of radioactivity was found in the nuclear, mitochondria and microsome fractions. In Yoshida sarcoma, the results were almost similar in the three nuclides. And the specific activities of protein (cpm/mg) of these four fractions were not greatly different in the three nuclides. After intravenous injection of these nuclides, they were rapidly taken up into the tumor, and not excreted out of the tumor. It is a well-known fact that /sup 169/Yb, /sup 67/Ga and /sup 111/In are not sulfur coordinators, but weak nitrogen coordinators. Considering the above-described facts, it is presumed that the chemical bond of these elements is not a chelate ring, but anionic bond. From an in vitro adsorption test of these nuclides with the hydroxy-apatite crystal and cation exchange resin, it is presumed that the reason for the strong affinity of /sup 169/Yb to the bone is attributed to the fact that /sup 169/Yb stays mostly in cation form in the blood.

  7. Measurement of the d({sup 26}Al{sup m},p){sup 27}Al reaction for nuclear astrophysics

    Energy Technology Data Exchange (ETDEWEB)

    Roeder, B.T.; Trache, L.; Iacob, V.E.; McCleskey, M.; Simmons, E.; Spiridon, A.; Tribble, R.E. [Texas A and M Univ., TX (United States); Davinson, T.; Lotay, G.; Woods, P.J. [University of Edinburgh (United Kingdom); La Cognata, M.; Pizzone, R.G.; Rapisarda, G.G.; Sparta, R.; Spitaleri, C. [Istituto Nazionale di Fisica Nucleare (LNS/INFN), Catania (Italy). Lab. Nazionali del Sud

    2012-07-01

    Full text: The detection of gamma rays from the decay of the {sup 26}Al ground state in the galaxy gives evidence that nucleosynthesis is occurring in present-day stars, but its origin is not yet clear. This implies that reactions involving {sup 26}Al are important for astrophysical processes. In a recent experiment at the Cyclotron Institute at Texas A and M University, reactions with the ground state and isomeric state of {sup 26}Al were investigated with the Texas A and M-Edinburgh-Catania Silicon detector Array (TECSA). TECSA is a collaborative effort to build a high-efficiency detector Si array useful for measuring reactions of interest for nuclear astrophysics and nuclear structure. The array consists of up to 16 Micron Semiconductor YY1 detectors that are each 300 μm thick. Each detector has 16 annular ring sectors to measure the energy and the scattering angle of the detected particles. Using TECSA, we measured d({sup 26}Al{sup g},p){sup 27}Al and d({sup 26}Al{sup m},p){sup 27}Al with a {sup 26}Al secondary beam prepared in-flight with the MARS spectrometer. First, the composition of the {sup 26}Al beam was determined by measuring the ratio of beta-decays to {sup 26}Al ions produced. It was found that at different spectrometer rigidities, beams of 2/3 isomer to ground state ratio or vice-versa could be obtained. Then, in the second part of the experiment, angular distributions were measured for both reactions at backward angles with TECSA. The protons were measured in TECSA in coincidence with timing signals from the beam detected by a scintillator and with the cyclotron radio-frequency. Details of the experiment and preliminary results from the analysis of the d({sup 26}Al{sup m},p){sup 27}Al and d({sup 26}Al{sup g},p){sup 27}Al data will be presented. They will give information about the proton capture reactions {sup 26}Al{sup m}(p,γ){sup 27}Si and {sup 26}Al{sup g}(p,γ){sup 27}Si taking place in stars. (author)

  8. Development of positron emitting radionuclides for imaging with improved positron detectors. [/sup 82/Rb, /sup 62/Zn, /sup 64/Cu, /sup 67/Ga

    Energy Technology Data Exchange (ETDEWEB)

    Yano, Y.

    1976-10-01

    Recent advances in positron cameras and positron ring detectors for transverse section reconstruction have created renewed interest in positron emitting radionuclides. This paper reports on: generator-produced /sup 82/Rb; cyclotron-produced /sup 62/Zn; and reactor-produced /sup 64/Cu. Investigation of the /sup 82/Sr (25 d)--/sup 82/Rb (75 s) generator determined the elution characteristics for Bio-Rex 70, a weakly acidic carboxylic cation exchanger, using 2% NaCl as the eluent. The yield of /sup 82/Rb and the breakthrough of /sup 82/Sr were determined for newly prepared columns and for long term elution conditions. Spallation-produced /sup 82/Sr was used to charge a compact /sup 82/Rb generator to obtain multi-millicurie amounts of /sup 82/Rb for myocardial imaging. Zinc accumulates in the islet cells of the pancreas and in the prostate. Zinc-62 was produced by protons on Cu foil and separated by column chromatography. Zinc-62 was administered as the amino acid chelates and as the ZnCl/sub 2/ to tumor and normal animals. Tissue distribution was determined for various times after intravenous injection. Pancreas-liver images of /sup 62/Zn-histidine uptake were obtained in animals with the gamma camera and the liver uptake of /sup 99m/Tc sulfur colloid was computer subtracted to image the pancreas alone. The positron camera imaged uptake of /sup 62/Zn-histidine in the prostate of a dog at 20 h. /sup 64/Cu was chelated to asparagine, a requirement of leukemic cells, and administered to lymphoma mice. Uptake in tumor and various tissues was determined and compared with the uptake of /sup 67/Ga citrate under the same conditions. /sup 64/Cu-asparagine had better tumor-to-soft tissue ratios than /sup 67/Ga-citrate.

  9. Country report: Syria. Development of {sup 90}Y/{sup 90}Sr Generator and {sup 90}Y Radiopharmaceuticals

    Energy Technology Data Exchange (ETDEWEB)

    Yassine, Taufik; Mukhallalati, Ch. Heyam, E-mail: atomic@aec.org.sy [Atomic Energy Commission of Syria, Damascus (Syrian Arab Republic)

    2010-07-01

    The aim of this project is to develop a technique for preparation of {sup 90}Sr-{sup 90}Y generator, we have developed a separation technique for isolation of {sup 90}Y from {sup 90}Sr based on using Sr – Spec resin packed in three columns for separation and purification of {sup 90}Sr-{sup 90}Y .The resulting Y90 is used for therapeutic applications. The first part of this project describe a prototype design for the {sup 90}Sr- {sup 90}Y generator in order to get a very accurate method to obtain the minimum possible {sup 90}Sr Breakthrough. 25 mci of {sup 90}Sr was used in the generator {sup 90}Sr-{sup 90}Y and we obtained the elution yield of {sup 90}Y higher than 88%, Also the eluate was used for preparation of several {sup 90}Y radiopharmaceuticals such as {sup 90}YEDTMP and {sup 90}Y-DOTA-HR{sub 3}. And the work is continues to investigate more radiopharmaceuticals applications in the second part of this project such as {sup 90}Y– FHMA. In this part of the co-coordination research programmer, A protocol based on results of this studies was developed to prepare and operate a higher activity generator (50-100mci), the resulting elution yield was approximately 94% of {sup 90}Y . The elute was used in preparation of new {sup 90}Y radiopharmaceuticals. The monoclonal antibodies is still evolving by conjugate Rituximab to The macrocyclic bifunctional chelating agent,(p-SCN-Bn-DOTA)S-2-(4-Isothiocyanatobenzyle)-1,4,7,10- tetraazacyclododecane-tetraaceticacid to obtain the inmunoconjugate DOTA-Rituximub in simple way and then investigating the radio labeling conditions with {sup 90}Y. (author)

  10. Muon capture on deuteron and <sup>3sup>He

    Energy Technology Data Exchange (ETDEWEB)

    Marcucci, L. E.; Piarulli, M.; Viviani, M.; Girlanda, L.; Kievsky, A.; Rosati, S.; Schiavilla, R.

    2011-01-01

    The muon capture reactions <sup>2sup>H(μ->, vμ)nn and <sup>3sup>He(μ->, vμ)<sup>3sup>H are studied with realistic or chiral potentials and consistent weak currents. The initial and final A = 2 and 3 nuclear wave functions are obtained from the Argonne v18 (AV18) or chiral N3LO (N3LO) two-nucleon potential, in combination with, respectively, the Urbana IX (UIX) or chiral N2LO (N2LO) three-nucleon potential in the case of A = 3. The weak current consists of polar- and axial-vector components. The former are related to the isovector piece of the electromagnetic current via the conserved-vector-current hypothesis. These and the axial currents are derived either in a meson-exchange or in a chiral effective field theory ( EFT) framework. There is one parameter (either the N-to-Delta axial coupling constant in the meson-exchange model, or the strength of a contact term in the EFT model) which is fixed by reproducing the Gamow-Teller matrix element in tritium-decay. The model dependence relative to the adopted interactions and currents (and cutoff sensitivity in the EFT currents) is weak, resulting in total rates of 392.0 ± 2.3 s<sup>-1sup> for A = 2, and 1484 ± 13 s<sup>-1sup> for A = 3, where the spread accounts for this model dependence.

  11. Preparation of the beam for PS-MTE at the PSB

    CERN Document Server

    Chanel, M; CERN. Geneva. BE Department

    2009-01-01

    The Multi-Turn Extraction(MTE)1 at the PS requires, from the PSB, a beam(up to 6.5 1012 protons/ring) with a large horizontal emittance to better produce the five beamlets and a vertical emittance as small as possible. The ways to produce this beam and adjust the parameters are described in this note.

  12. Determination of the isotopic ratio {sup 234} U/{sup 238} U and {sup 235} U/{sup 238} U in uranium commercial reagents by alpha spectroscopy; Determinacion de la relacion isotopica {sup 234} U/{sup 238} U y {sup 235} U/{sup 238} U en reactivos comerciales de uranio por espectrometria alfa

    Energy Technology Data Exchange (ETDEWEB)

    Iturbe G, J L

    1990-02-15

    In this work the determination of the isotope ratio {sup 234} U/{sup 238} U and {sup 235} U/{sup 238} U obtained by means of the alpha spectroscopy technique in uranium reagents of commercial marks is presented. The analyzed uranium reagents were: UO{sub 2} (*) nuclear purity, UO{sub 3} (*) poly-science, metallic uranium, uranyl nitrate and uranyl acetate Merck, uranyl acetate and uranyl nitrate Baker, uranyl nitrate (*) of the Refinement and Conversion Department of the ININ, uranyl acetate (*) Medi-Lab Sigma of Mexico and uranyl nitrate Em Science. The obtained results show that the reagents that are suitable with asterisk (*) are in radioactive balance among the one {sup 234} U/{sup 238} U, since the obtained value went near to the unit. In the case of the isotope ratio {sup 235} U/{sup 238} U the near value was also obtained the one that marks the literature that is to say 0.04347, what indicates that these reagents contain the isotope of {sup 235} U in the percentage found in the nature of 0.71%. The other reagents are in radioactive imbalance among the {sup 234} U/{sup 238} U, the found values fluctuated between 0.4187 and 0.1677, and for the quotient of activities {sup 235} U/{sup 238} U its were of 0.0226, and the lowest of 0.01084. Also in these reagents it was at the {sup 236} U as impurity. The isotope of {sup 236} U is an isotope produced artificially, for what is supposed that the reagents that are in radioactive imbalance were synthesized starting from irradiated fuel. (Author)

  13. Measurement of the effective B{sub s}{sup 0}{yields}K{sup +}K{sup -} lifetime

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adametz, A. [Physikalisches Institut, Ruprecht-Karls-Universitaet Heidelberg, Heidelberg (Germany); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); and others

    2012-10-02

    A precise determination of the effective B{sub s}{sup 0}{yields}K{sup +}K{sup -} lifetime can be used to constrain contributions from physics beyond the Standard Model in the B{sub s}{sup 0} meson system. Conventional approaches select B meson decay products that are significantly displaced from the B meson production vertex. As a consequence, B mesons with low decay times are suppressed, introducing a bias to the decay time spectrum which must be corrected. This analysis uses a technique that explicitly avoids a lifetime bias by using a neural network based trigger and event selection. Using 1.0 fb{sup -1} of data recorded by the LHCb experiment, the effective B{sub s}{sup 0}{yields}K{sup +}K{sup -} lifetime is measured as 1.455{+-}0.046(stat.){+-}0.006(syst.)ps.

  14. Dispersion-theoretical analysis of the D{sup +}→K{sup −}π{sup +}π{sup +} Dalitz plot

    Energy Technology Data Exchange (ETDEWEB)

    Niecknig, Franz; Kubis, Bastian [Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) andBethe Center for Theoretical Physics, Universität Bonn,53115 Bonn (Germany)

    2015-10-22

    We study the Dalitz plot of the Cabibbo-favored charmed-meson decay D{sup +}→K{sup −}π{sup +}π{sup +} using dispersion theory. The formalism respects all constraints from analyticity and unitarity, and consistently describes final-state interactions between all three decay products. We employ pion-pion and pion-kaon phase shifts as input, and fit the pertinent subtraction constants to Dalitz plot data by the CLEO and FOCUS collaborations. Phase motions of resonant as well as nonresonant amplitudes are discussed, which should provide crucial input for future studies of CP violation in similar three-body charm decays.

  15. [sup 60]Co, [sup 63]Ni and [sup 94]Nb soil-to-plant transfer in pot experiments

    Energy Technology Data Exchange (ETDEWEB)

    Gerzabek, M.H.; Mohamad, S.A.; Mueck, K.; Horak, O. (Austrian Research Centre Seibersdorf (Austria). Div. of Life Sciences)

    1994-01-01

    Soil-to-plant transfer factors for [sup 60]Co, [sup 63]Ni and [sup 94]Nb were obtained via pot experiments with a Dystric Cambisol and a Calcic Chernozem, both from Lower Austria. Investigated plants were greenrape (Brassica napus oleifera L.), bean (Phaseolus vulgaris L.) and winter wheat (Triticum aestivum L.). The soil-to-plant transfer factors decreased from [sup 63]Ni to [sup 60]Co and [sup 94]Nb. Mean values from all experiments ranged from 1.12 ([sup 63]Ni) to 0.0045 ([sup 94]Nb). The transfer values obtained for [sup 60]Co and [sup 63]Ni are comparable to literature values, but [sup 94]Nb-transfer seems to be lower than previous estimates. All radionuclides showed differences between plant species and plant organs. Transfer values were also dependent on the soil type. (author).

  16. Searches for massive neutrino emission in <sup>14sup>C beta and <sup>55sup>Fe electron-capture decays

    Energy Technology Data Exchange (ETDEWEB)

    Wietfeldt, Fred Eberhardt [Univ. of California, Berkeley, CA (United States)

    1994-05-01

    In 1985 Simpson reported evidence for the emission of a 17 keV mass neutrino in a small fraction of tritium beta decays. An experimental controversy ensued in which a number of both positive and negative results were reported. The beta spectrum of <sup>14sup>C was collected in a unique <sup>14sup>C-doped planar germanium detector and a distortion was observed that initially confirmed Simpson`s result. Further tests linked this distortion to a splitting of the collected charge between the central detector and the surrounding guard ring in a fraction of the events. A second <sup>14sup>C measurement showed no evidence for emission of a 17 keV mass neutrino. In a related experiment, a high statistics electron-capture internal-bremsstrahlung photon spectrum of <sup>55sup>Fe was collected with a coaxial germanium detector. A local search for departures from a smooth shape near the endpoint was performed, using a second-derivative technique. An upper limit of 0.65% (95% C.L.) for the mixing Of a neutrino in the mass range 5--25 keV was established. The upper limit on the mixing of a 17 keV mass neutrino was 0.14% (95% C.L.).

  17. Elastic {pi}{sup +}p and {pi}{sup +}{pi}{sup +} scattering at LHC

    Energy Technology Data Exchange (ETDEWEB)

    Sobol, A.E.; Ryutin, R.A.; Petrov, V.A. [Institute for High Energy Physics, Protvino (Russian Federation); Murray, M.J. [University of Kansas, Lawrence (United States)

    2010-10-15

    We discuss the possibility of measuring leading neutron production at the LHC. These data could be used to extract from it {pi}{sup +}p and {pi}{sup +}{pi}{sup +} cross sections. In this note we give some estimates for the case of elastic cross sections and discuss related problems and prospects. (orig.)

  18. Geometrical aspects of reaction cross sections for {sup 3}He, {sup 4}He and {sup 12}C projectiles

    Energy Technology Data Exchange (ETDEWEB)

    Ingemarsson, A. [Uppsala Univ. (Sweden). Dept. of Radiation Sciences; Lantz, M. [Uppsala Univ. (Sweden). The Svedberg Laboratory

    2003-04-01

    A black-disc model combined with accurate matter densities has been used for an investigation of reaction cross sections for {sup 3}He, {sup 4}He and {sup 12}C projectiles. A simple relation is derived between the energy dependence of the reaction cross sections and the strength of the nucleon-nucleon interaction. A comparison is also made of the reaction cross sections for {sup 3}He and {sup 4}He for six different nuclei {sup 12}C, {sup 16}O, {sup 40}Ca, {sup 58,60}Ni and {sup 208}Pb.

  19. Cosmic-ray-induced sup 6 sup 3 Ni -A potential confounder of fast-neutron-induced sup 6 sup 3 Ni in copper samples from Hiroshima

    CERN Document Server

    Rühm, W; Wallner, A; Fästermann, T; Knie, K; Heisinger, B; Nolte, E; Korschinek, G; Marchetti, A A; Martinelli, R E; Carroll, K L

    2003-01-01

    Recently, the determination of sup 6 sup 3 Ni in copper samples has been suggested as a means to assess fast-neutron fluences in Hiroshima and Nagasaki. In those samples, sup 6 sup 3 Ni (half-life: 100.07 years) was produced by MeV neutrons from the A-bomb explosions via the reaction sup 6 sup 3 Cu(n,p) sup 6 sup 3 Ni. For large distances from the hypocenters, cosmic-ray-induced production of sup 6 sup 3 Ni might also be important and, therefore, it is calculated here. The effective probability f sup * which is required to quantify the cosmic-ray-induced production by stopped muons, was measured, and a value of (12.6 +-1.6)% obtained. The cross-section for the cosmic-ray-induced production by fast muons was measured to be (0.64 +-0.33) mb, at a muon energy of 100 GeV. To validate the proposed method, cosmic-ray-induced production of sup 3 sup 2 P in sulfur and of sup 3 sup 9 Ar in granite was also calculated, and reasonable agreement with literature values was found. Our estimates indicate that as many as (4 ...

  20. Investigation of two-phonon 1{sup -} states in {sup 40}Ca and {sup 140}Ce with the γ{sup 3} setup at HIγS

    Energy Technology Data Exchange (ETDEWEB)

    Wilhelmy, Julius; Derya, Vera; Endres, Janis; Hennig, Andreas; Zilges, Andreas [Institute for Nuclear Physics, University of Cologne (Germany); Loeher, Bastian; Savran, Deniz [ExtreMe Matter Institute EMMI and Research Division, GSI, Darmstadt (Germany); Frankfurt Institute for Advanced Studies FIAS, Frankfurt (Germany); Tornow, Werner [Department of Physics, Duke University (United States)

    2015-07-01

    The harmonic coupling of a quadrupole and an octupole vibrational excitation results in a quintuplet of J{sup π}=1{sup -} to 5{sup -} vibrational states at the sum of the constituent excitation energies. Their detailed γ-decay behavior can provide information about their structure. For {sup 40}Ca and {sup 140}Ce, possible two-phonon E1 excitations were studied with the high-efficiency γ{sup 3} setup at the High Intensity γ-ray Source facility at TUNL in Durham, USA. The γ{sup 3} setup consists of an array of HPGe and LaBr{sub 3} detectors with high efficiency and enables the measurement of γ-γ coincidences. The determination of the B(E2; 1{sub 1}{sup -} → 3{sub 1}{sup -}) value was possible showing a dominant two-phonon character of the 1{sup -}{sub 1} state in {sup 40}Ca. For the same decay in {sup 140}Ce, an upper limit for the reduced transition probability can be given and an unexpected E1 decay to the 0{sub 2}{sup +} state was observed. The experimental results are presented and discussed with regard to systematics and theoretical predictions.

  1. Zn and Ni substitutional effects on spin fluctuations in YBa sub 2 Cu sub 3 O sub 7 by sup 6 sup 3 sup , sup 6 sup 5 Cu NQR

    CERN Document Server

    Han, K S; Mean, B J; Lee, K H; Seo, S W; Lee, M H; Lee, W C

    2000-01-01

    We have prepared Zn- and Ni-substituted YBa sub 2 Cu sub 3 O sub 7 (YBa sub 2 Cu sub 3 sub - sub x M sub x O sub 7 , M=Zn or Ni, x=0.00 approx 0.09) and performed sup 6 sup 3 sup , sup 6 sup 5 Cu nuclear quadrupole resonance (NQR) measurements for the plane site at 300 and 100 K. Substitutional effects on the relaxation rates are markedly different. Both the spin-lattice and the spin-spin relaxation rates decrease for Zn-doped YBCO. However, those increase for Ni-doped YBCO. This contrast in local electronic dynamics provides clear microscopic evidence that Zn forms no local moment while Ni develops a local moment. Consequently, the antiferromagnetic spin fluctuation is suppressed by Zn doping whereas it is preserved by Ni doping. This is also confirmed by the ratio of the sup 6 sup 3 sup , sup 6 sup 5 Cu spin-lattice relaxation rates for the plane coppers.

  2. Excitation functions of the {sup nat}Cr(p,x){sup 44}Ti, {sup 56}Fe(p,x){sup 44}Ti, {sup nat}Ni(p,x){sup 44}Ti and {sup 93}Nb(p,x){sup 44}Ti reactions at energies up to 2.6 GeV

    Energy Technology Data Exchange (ETDEWEB)

    Titarenko, Yu. E.; Batyaev, V.F.; Pavlov, K.V.; Titarenko, A. Yu. [National Research Center Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); Zhivun, V.M. [National Research Center Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow 115409 (Russian Federation); Chauzova, M.V.; Balyuk, S.A.; Bebenin, P.V. [National Research Center Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); Ignatyuk, A.V. [National Research Center Kurchatov Institute, Institute for Theoretical and Experimental Physics, Moscow 117218 (Russian Federation); Institute of Physics and Power Engineering, Obninsk 249033 (Russian Federation); Mashnik, S.G. [Los Alamos National Laboratory (United States); Leray, S.; Boudard, A.; David, J.C.; Mancusi, D. [CEA/Saclay, Irfu/SPhN, 91191 Gif-sur-Yvette, Cedex (France); Cugnon, J. [University of Liege (Belgium); Yariv, Y. [SoreqNRC, Yavne (Israel); Nishihara, K.; Matsuda, N. [JAEA, Tokai (Japan); Kumawat, H. [BARC, Mumbai (India); Stankovskiy, A. Yu. [SCK-CEN (Belgium)

    2016-06-11

    The paper presents the measured cumulative yields of {sup 44}Ti for {sup nat}Cr, {sup 56}Fe, {sup nat}Ni and {sup 93}Nb samples irradiated by protons at the energy range 0.04–2.6 GeV. The obtained excitation functions are compared with calculations of the well-known codes: ISABEL, Bertini, INCL4.2+ABLA, INCL4.5+ABLA07, PHITS, CASCADE07 and CEM03.02. The predictive power of these codes regarding the studied nuclides is analyzed.

  3. Electromagnetic dissociation of relativistic <sup>28sup>Si by nucleon emission

    Energy Technology Data Exchange (ETDEWEB)

    Sonnadara, Upal Jayasiri [Univ. of Pittsburgh, PA (United States)

    1992-12-01

    A detailed study of the electromagnetic dissociation of <sup>28sup>Si by nucleon emission at Elab/A = 14.6 (GeV/nucleon was carried out with <sup>28sup>Si beams interacting on <sup>208sup>Pb). <sup>120sup>Sn. <sup>64sup>C targets. The measurements apparatus consists of detectors in the target area which measure the energy and charged multiplicity, and a forward spectrometer which measures the position, momentum and energy of the reaction fragments. The exclusive electromagnetic dissociation cross sections for decay channels having multiple nucleons in the final state have been measured which enables the selection of events produced in pure electromagnetic interactions. The measured cross sections agree well with previous measurements obtained for the removal of a few nucleons as well as with measurements on total charge removal cross sections from other experiments. The dependence of the integrated cross sections on the target charge ZT and the target mass AT confirms that for higher Z targets the excitation is largely electromagnetic. Direct measurements of the excitation energy for the electromagnetic dissociation of <sup>28sup>Si → p+<sup>27sup>Al and <sup>28sup>Si → n+<sup>27sup>Si have been obtained through a calculation of the invariant mass in kinematically, reconstructed events. The excitation energy spectrum for all targets peak near the isovector giant dipole resonance in <sup>28sup>Si. These distributions are well reproduced by combining the photon spectrum calculated using the Weizsaecker-Williams approximation with the experimental data on the photonuclear <sup>28sup>Si(γ,p)>27sup>Al and <sup>28sup>Si(γ,n)>27sup>Si. The possibilities of observing double giant dipole resonance excitations in <sup>28sup>Si have been investigated with cross section measurements as well as with excitation energy reconstruction.

  4. Weak contributions to angular asymmetries in e/sup +/e/sup -/ annihilation

    Energy Technology Data Exchange (ETDEWEB)

    Schiller, H D [Gesamthochschule Siegen (Germany, F.R.). Abt. fuer Physik

    1979-01-01

    We study the energy and polarization dependence of angular asymmetries in e/sup -/e/sup +/ ..-->.. ..gamma.., Z/sup 0/ ..-->.. f anti f (f = lepton or quark). Through the fragmentation of the quarks the corresponding asymmetries are obtained for the jet axis in e/sup -/e/sup +/ ..-->.. ..gamma.., Z/sup 0/ ..-->.. (..sigma..q anti q) ..-->.. 2 jets, and for inclusively produced hadrons h(h = ..pi../sup +/, K/sup +/ and ..pi../sup +/ + K/sup +/) in e/sup -/e/sup +/ ..-->.. ..gamma.., Z/sup 0/ ..-->.. (..sigma..q anti q) ..-->.. (h + X)/sub 2/ jet. In the Weinberg-Salam model these asymmetries come out big enough to show up already at upper PETRA and PEP energies.

  5. Measurement of the Branching Fraction and Polarization for the Decay B sup - -> D* sup 0 K* sup -

    CERN Document Server

    Verkerke, W

    2003-01-01

    The present a study of the decay B sup - -> D* sup 0 K* sup - based on a sample of 86 million UPSILON(4S) -> B(bar B) decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factor at SLAC. The measure the branching fraction BETA(B sup - -> D* sup 0 K* sup -) = (8.3 +- 1.1(stat) +- 1.0(syst)) x 10 sup - sup 4 , and the fraction of longitudinal polarization in this decay to be LAMBDA sub L /LAMBDA = 0.86 +- 0.06(stat) +- 0.03(syst).

  6. Charged Higgs contribution to B{sup ¯}{sub s}→ϕπ{sup 0} and B{sup ¯}{sub s}→ϕρ{sup 0}

    Energy Technology Data Exchange (ETDEWEB)

    Faisel, Gaber, E-mail: gfaisel@hep1.phys.ntu.edu.tw [Department of Physics, National Taiwan University, Taipei 10617, Taiwan (China); Department of Physics and Center for Mathematics and Theoretical Physics, National Central University, Chung-Li 32054, Taiwan (China); Egyptian Center for Theoretical Physics, Modern University for Information and Technology, Cairo (Egypt)

    2014-04-04

    We study the decay modes B{sup ¯}{sub s}→ϕπ{sup 0} and B{sup ¯}{sub s}→ϕρ{sup 0} within the frameworks of two-Higgs doublet models type-II and type-III. We adopt in our study Soft Collinear Effective Theory as a framework for the calculation of the amplitudes. We derive the contributions of the charged Higgs mediation to the weak effective Hamiltonian governing the decay processes in both models. Moreover, we analyze the effect of the charged Higgs mediation on the Wilson coefficients of the electroweak penguins and on the branching ratios of B{sup ¯}{sub s}→ϕπ{sup 0} and B{sup ¯}{sub s}→ϕρ{sup 0} decays. We show that within two-Higgs doublet models type-II and type-III the Wilson coefficients corresponding to the electroweak penguins can be enhanced due to the contributions from the charged Higgs mediation leading into enhancement in the branching ratios of B{sup ¯}{sub s}→ϕπ{sup 0} and B{sup ¯}{sub s}→ϕρ{sup 0} decays. We find that, within two-Higgs doublet models type-II, the enhancement in the branching ratio of B{sup ¯}{sub s}→ϕπ{sup 0} cannot exceed 18% with respect to the SM predictions. For the branching ratio of B{sup ¯}{sub s}→ϕρ{sup 0}, we find that the charged Higgs contribution in this case is small where the branching ratio of B{sup ¯}{sub s}→ϕρ{sup 0} can be enhanced or reduced by about 4% with respect to the SM predictions. For the case of the two-Higgs doublet models type-III we show that the branching ratio of B{sup ¯}{sub s}→ϕπ{sup 0} can be enhanced by about a factor 2 of its value within two-Higgs doublet models type-II. However, no sizeable enhancement with respect to the SM predictions can be obtained for both B{sup ¯}{sub s}→ϕπ{sup 0} and B{sup ¯}{sub s}→ϕρ{sup 0} decays.

  7. Mass spectrum analysis of K<sup>-> π<sup>+> from the semileptonic decay D<sup>+> → K<sup>- sup>π+μ+>v

    Energy Technology Data Exchange (ETDEWEB)

    Massafferri Rodrigues, Andre [Univ. of Washington, Seattle, WA (United States)

    2004-03-01

    The Higgs mechanism preserves the gauge symmetries of the Standard Model while giving masses to the W, Z bosons. Supersymmetry, which protects the Higgs boson mass scale from quantum corrections, predicts at least 5 Higgs bosons, none of which has been directly observed. This thesis presents a search for neutral Higgs bosons, produced in association with bottom quarks. The production rate is greatly enhanced at large values of the Supersymmetric parameter tan β. High-energy p$\\bar{p}$ collision data, collected from Run II of the Fermilab Tevatron using the D0 detector, are analyzed. In the absence of a signal, values of tan β > 80-120 are excluded at 95% Confidence Level (C.L.), depending on the (CP-odd) neutral Higgs boson mass (studied from 100 to 150 GeV/c<sup>2sup>).

  8. A T = 3/2 LEVEL IN Be<sup>9sup>

    Energy Technology Data Exchange (ETDEWEB)

    Lauritsen, T.; Lynch, B.; Griffiths, G.

    1963-12-15

    Targets of Li<sup>7sup> were bombarded with a He<sup>3sup> beam from a tandem accelerator, and the resulting proton spectrum was studied to determined a T = 3/ 2 level in Be<sup>9sup> at about 14.5 Mev. (R.E.U.)

  9. Physiological studies of environmental pollutants. Progress report, September 1, 1975--May 31, 1976. [/sup 210/Po, /sup 203/Pb, /sup 201/Tl, /sup 207/Bi, /sup 65/Zn

    Energy Technology Data Exchange (ETDEWEB)

    Lengemann, F W; Wentworth, R A

    1976-01-01

    In the past year we have looked at the transfer of some members of the actinide decay series into milk of goats. These were /sup 210/Po, /sup 203/Pb, /sup 201/Tl and /sup 207/Bi. All of these appeared in milk after oral ingestion but at levels less than 1 percent per liter. In addition we have looked at the transfer of /sup 65/Zn into milk of goats after oral and I.V. doses; the experiments are incomplete at this time. In controlled temperature studies it was found that 6.6 times as much radioiodine was secreted into milk when goats were at 33/sup 0/ as opposed to 5/sup 0/C. When radioiodine is put into the mammary gland the transfer from milk to body is rapid; more rapid than is the case for /sup 65/Zn. The analysis of these data indicate the need for a model capable of handling expansion of a compartment.

  10. Estimation of uncertainties in resonance parameters of {sup 56}Fe, {sup 239}Pu, {sup 240}Pu and {sup 238}U

    Energy Technology Data Exchange (ETDEWEB)

    Nakagawa, Tsuneo; Shibata, Keiichi [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1997-05-01

    Uncertainties have been estimated for the resonance parameters of {sup 56}Fe, {sup 239}Pu, {sup 240}Pu and {sup 238}U contained in JENDL-3.2. Errors of the parameters were determined from the measurements which the evaluation was based on. The estimated errors have been compiled in the MF32 of the ENDF format. The numerical results are given in tables. (author)

  11. High spin states and isomeric decays in doubly-odd {sup 208}Fr

    Energy Technology Data Exchange (ETDEWEB)

    Kanjilal, D.; Bhattacharya, S.; Goswami, A.; Kshetri, R.; Raut, R. [Nuclear and Atomic Physics Division, Saha Institute of Nuclear Physics, Kolkata 700064 (India); Saha, S., E-mail: satyajit.saha@saha.ac.i [Nuclear and Atomic Physics Division, Saha Institute of Nuclear Physics, Kolkata 700064 (India); Bhowmik, R.K.; Gehlot, J.; Muralithar, S.; Singh, R.P. [Inter University Accelerator Centre, New Delhi 110067 (India); Jnaneswari, G. [Department of Physics, Andhra University, Vishakhapatnam 530003 (India); Mukherjee, G. [Variable Energy Cyclotron Centre, Kolkata 700064 (India); Mukherjee, B. [Department of Physics, Visva Bharati, Santiniketan 731235 (India)

    2010-10-15

    Neutron deficient isotopes of francium (Z=87, N{approx}121-123) as excited nuclei were produced in the fusion-evaporation reaction: {sup 197}Au({sup 16}O, xn) {sup 213-x}Fr at 100 MeV. The {gamma} rays from the residues were observed through the high sensitivity Germanium Clover detector array INGA. The decay of the high spin states and the isomeric states of the doubly-odd {sup 208}Fr nuclei, identified from the known sequence of ground state transitions, were observed. The half-lives of the E{sub {gamma}=}194(2) keV isomeric transition, known from earlier observations, was measured to be T{sub 1/2}=233(18) ns. A second isomeric transition at E{sub {gamma}=}383(2) keV and T{sub 1/2}=33(7) ns was also found. The measured half-lives were compared with the corresponding single particle estimates, based on the level scheme obtained from the experiment.

  12. Measurement of the two-neutrino double-beta decay half-life of {sup 130}Te with the CUORE-0 experiment

    Energy Technology Data Exchange (ETDEWEB)

    Alduino, C.; Avignone, F.T.; Chott, N.; Creswick, R.J.; Rosenfeld, C.; Wilson, J. [University of South Carolina, Department of Physics and Astronomy, Columbia, SC (United States); Alfonso, K.; Hickerson, K.P.; Huang, H.Z.; Liu, X.; Trentalange, S.; Zhu, B.X. [University of California, Department of Physics and Astronomy, Los Angeles, CA (United States); Artusa, D.R. [University of South Carolina, Department of Physics and Astronomy, Columbia, SC (United States); INFN-Laboratori Nazionali del Gran Sasso, Assergi, L' Aquila (Italy); Azzolini, O.; Camacho, A.; Keppel, G.; Palmieri, V.; Pira, C. [INFN-Laboratori Nazionali di Legnaro, Legnaro, Padova (Italy); Banks, T.I.; Drobizhev, A.; Freedman, S.J.; Hennings-Yeomans, R.; O' Donnell, T.; Wagaarachchi, S.L. [University of California, Department of Physics, Berkeley, CA (United States); Lawrence Berkeley National Laboratory, Nuclear Science Division, Berkeley, CA (United States); Bari, G.; Deninno, M.M. [INFN-Sezione di Bologna, Bologna (Italy); Beeman, J.W. [Lawrence Berkeley National Laboratory, Materials Science Division, Berkeley, CA (United States); Bellini, F.; Cardani, L.; Casali, N.; Cosmelli, C.; Ferroni, F. [Sapienza Universita di Roma, Dipartimento di Fisica, Rome (Italy); INFN-Sezione di Roma, Rome (Italy); Bersani, A.; Caminata, A. [INFN-Sezione di Genova, Genova (Italy); Biassoni, M.; Carbone, L.; Cremonesi, O.; Ferri, E.; Giachero, A.; Pessina, G.; Previtali, E.; Rusconi, C. [INFN-Sezione di Milano Bicocca, Milan (Italy); Brofferio, C.; Capelli, S.; Carniti, P.; Cassina, L.; Chiesa, D.; Clemenza, M.; Faverzani, M.; Fiorini, E.; Gironi, L.; Gotti, C.; Maino, M.; Nucciotti, A.; Pavan, M.; Pozzi, S.; Sisti, M.; Terranova, F.; Zanotti, L. [Universita di Milano-Bicocca, Dipartimento di Fisica, Milan (Italy); INFN-Sezione di Milano Bicocca, Milan (Italy); Bucci, C.; Cappelli, L.; D' Addabbo, A.; Di Vacri, M.L.; Gorla, P.; Pattavina, L.; Pirro, S. [INFN-Laboratori Nazionali del Gran Sasso, Assergi, L' Aquila (Italy); Canonica, L. [INFN-Laboratori Nazionali del Gran Sasso, Assergi, L' Aquila (Italy); Massachusetts Institute of Technology, Cambridge, MA (United States); Cao, X.G.; Fang, D.Q.; Ma, Y.G.; Wang, H.W.; Zhang, G.Q. [Chinese Academy of Sciences, Shanghai Institute of Applied Physics, Shanghai (China); Copello, S.; Di Domizio, S.; Fernandes, G.; Marini, L.; Pallavicini, M. [INFN-Sezione di Genova, Genova (Italy); Universita di Genova, Dipartimento di Fisica, Genova (Italy); Cushman, J.S.; Davis, C.J.; Heeger, K.M.; Lim, K.E.; Maruyama, R.H. [Yale University, Department of Physics, New Haven, CT (United States); Dafinei, I.; Morganti, S.; Mosteiro, P.J.; Orio, F.; Pettinacci, V.; Tomei, C.; Vignati, M. [INFN-Sezione di Roma, Rome (Italy); Dell' Oro, S. [INFN-Laboratori Nazionali del Gran Sasso, Assergi, L' Aquila (Italy); INFN-Gran Sasso Science Institute, L' Aquila (Italy); Feintzeig, J.; Fujikawa, B.K.; Mei, Y.; Smith, A.R. [Lawrence Berkeley National Laboratory, Nuclear Science Division, Berkeley, CA (United States); Franceschi, M.A.; Ligi, C.; Napolitano, T.; Piperno, G. [INFN-Laboratori Nazionali di Frascati, Frascati, Rome (Italy); Giuliani, A.; Tenconi, M. [Universite Paris-Saclay, CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Orsay (France); Gladstone, L.; Leder, A.; Winslow, L.A. [Massachusetts Institute of Technology, Cambridge, MA (United States); Gutierrez, T.D. [California Polytechnic State University, Physics Department, San Luis Obispo, CA (United States); Haller, E.E. [Lawrence Berkeley National Laboratory, Materials Science Division, Berkeley, CA (United States); University of California, Department of Materials Science and Engineering, Berkeley, CA (United States); Han, K. [Yale University, Department of Physics, New Haven, CT (United States); Shanghai Jiao Tong University, Department of Physics and Astronomy, Shanghai (China); Hansen, E. [University of California, Department of Physics and Astronomy, Los Angeles, CA (United States); Massachusetts Institute of Technology, Cambridge, MA (United States); Kadel, R. [Lawrence Berkeley National Laboratory, Physics Division, Berkeley, CA (United States); Kolomensky, Yu.G. [University of California, Department of Physics, Berkeley, CA (United States); Lawrence Berkeley National Laboratory, Nuclear Science Division, Berkeley, CA (United States); Lawrence Berkeley National Laboratory, Physics Division, Berkeley, CA (United States); Martinez, M. [Sapienza Universita di Roma, Dipartimento di Fisica, Rome (Italy); INFN-Sezione di Roma, Rome (Italy); Universidad de Zaragoza, Laboratorio de Fisica Nuclear y Astroparticulas, Zaragoza (Spain); Moggi, N. [INFN-Sezione di Bologna, Bologna (Italy); Alma Mater Studiorum-Universita di Bologna, Dipartimento di Scienze per la Qualita della Vita, Bologna (Italy); Nones, C. [Service de Physique des Particules, CEA/Saclay, Gif-sur-Yvette (France); Norman, E.B.; Wang, B.S. [Lawrence Livermore National Laboratory, Livermore, CA (United States); University of California, Department of Nuclear Engineering, Berkeley, CA (United States); Ouellet, J.L. [University of California, Department of Physics, Berkeley, CA (United States); Lawrence Berkeley National Laboratory, Nuclear Science Division, Berkeley, CA (United States); Massachusetts Institute of Technology, Cambridge, MA (United States); Pagliarone, C.E. [INFN-Laboratori Nazionali del Gran Sasso, Assergi, L' Aquila (Italy); Universita degli Studi di Cassino e del Lazio Meridionale, Dipartimento di Ingegneria Civile e Meccanica, Cassino (Italy); Sangiorgio, S.; Scielzo, N.D. [Lawrence Livermore National Laboratory, Livermore, CA (United States); Santone, D. [INFN-Laboratori Nazionali del Gran Sasso, Assergi, L' Aquila (Italy); Universita dell' Aquila, Dipartimento di Scienze Fisiche e Chimiche, L' Aquila (Italy); Singh, V. [University of California, Department of Physics, Berkeley, CA (US); Taffarello, L. [INFN-Sezione di Padova, Padova (IT); Wise, T. [Yale University, Department of Physics, New Haven, CT (US); University of Wisconsin, Department of Physics, Madison, WI (US); Woodcraft, A. [University of Edinburgh, SUPA, Institute for Astronomy, Edinburgh (GB); Zimmermann, S. [Lawrence Berkeley National Laboratory, Engineering Division, Berkeley, CA (US); Zucchelli, S. [INFN-Sezione di Bologna, Bologna (IT); Alma Mater Studiorum-Universita di Bologna, Dipartimento di Fisica e Astronomia, Bologna (IT)

    2017-01-15

    We report on the measurement of the two-neutrino double-beta decay half-life of {sup 130}Te with the CUORE-0 detector. From an exposure of 33.4 kg year of TeO{sub 2}, the half-life is determined to be T{sub 1/2}{sup 2ν} = [8.2 ± 0.2 (stat.) ± 0.6 (syst.)] x 10{sup 20} year. This result is obtained after a detailed reconstruction of the sources responsible for the CUORE-0 counting rate, with a specific study of those contributing to the {sup 130}Te neutrinoless double-beta decay region of interest. (orig.)

  13. $sup 155$Eu, $sup 144$Ce, $sup 125$Sb, $sup 106$Ru, $sup 95$Zr, $sup 54$Mn, and $sup 7$Be in the reindeer lichen Cladonia alpestris: deposition, retention and internal distribution, 1961--1970

    Energy Technology Data Exchange (ETDEWEB)

    Mattsson, L J.S.

    1972-09-01

    The retention and distribution of the fallout radionuclides , /sup 106/ Ru, /sup 95/Zr, and /sup 54/Mn and the naturally occurring radionuclide /sup 7/Be were studied in undisturbed natural carpets of the lichen Cladonia alpesiris, a major component of the diet of reindeer in the Lake Rogen district in central Sweden during the period 1961 to 1970. The contents of the artificially produced radionuclides in the lichen-carpet reached their maxima in 1963 to 1966 and all showed high retention values. During the seven-year period of 1962 to 1968 the average absorbed dose in the gut of a reindeer was calculated to be about 3 rad due to the passage of the food alone. The dominating contributions (about 40%) came from /sup 144/Ce. (CH)

  14. Study of the sup 3 H( sup 3 H, 2n) sup 4 He and sup 3 He( sup 3 He, 2p) sup 4 He reactions in the framework of three-cluster microscopic model

    CERN Document Server

    Vasilevsky, V S; Arickx, F; Broeckhove, J

    2002-01-01

    The reactions sup 3 H( sup 3 H, 2n) sup 4 He and sup 3 He( sup 3 He, 2p) sup 4 He are investigated within a fully microscopic cluster model featuring a three-cluster exit channel. A Hyperspherical Harmonics basis is used to describe the three-cluster continuum. The resulting astrophysical s-factor of both reactions is in good agreement with experimental data. Analysis of the low-energy scattering parameters reveals no evidence for a hidden resonance state would increase the cross-section of the reactions, and would help to resolve the solar neutrino problem.

  15. Lifetime measurements of N=Z nuclei {sup 44}Ti, {sup 48}Cr and {sup 52}Fe

    Energy Technology Data Exchange (ETDEWEB)

    Arnswald, Konrad; Seidlitz, Michael; Vogt, Andreas; Reiter, Peter; Birkenbach, Benedikt; Blazhev, Andrey; Braunroth, Thomas; Dewald, Alfred; Fransen, Christoph; Fu, Bo; Hennig, Andreas; Hirsch, Rouven; Lewandowski, Lars; Litzinger, Julia; Mueller-Gatermann, Claus; Rosiak, Dawid; Saed-Samii, Nima; Schneiders, David; Siebeck, Burkhard; Steinbach, Tim; Wolf, Kai; Zell, Karl-Oskar [Institut fuer Kernphysik, Universitaet zu Koeln (Germany)

    2015-07-01

    Reduced transition strengths expressed with B(E2) values are good signatures to describe collective excitations of atomic nuclei and are indispensable to understand nuclear shell structures. Along the N=Z line in the pf shell they provide stringent tests of recent shell model interactions. So far, B(E2, 2{sub 1}{sup +} → 0{sub 1}{sup +}) values for the self-conjugate {sub 22}{sup 44}Ti, {sub 24}{sup 48}Cr, {sub 26}{sup 52}Fe isotopes are known only with considerable errors. Recoil Distance Doppler Shift (RDDS) experiments were performed employing the Cologne coincidence plunger device to measure lifetimes with high precision in order to deduce model-independent B(E2) values for the 2{sub 1}{sup +} → 0{sub 1}{sup +} transition. Excited states in the nuclei of interest were populated with fusion-evaporation reactions. γ rays were detected by an array of 12 HPGe detectors, positioned at favourable forward and backward angles with respect to the beam axis. First results on {sup 44}Ti, {sup 48}Cr and {sup 52}Fe are presented.

  16. Evidence of two different Na/sup +/-dependent (/sup 3/H)-ouabain binding sites of a Na/sup +/-K/sup +/-ATPase of guinea-pig hearts

    Energy Technology Data Exchange (ETDEWEB)

    Fricke, U; Klaus, W [Koeln Univ. (Germany, F.R.)

    1977-11-01

    The influence of various Na/sup +/ concentrations on (/sup 3/H)-ouabain binding was studied in experiments on a microsomal Na/sup +/-K/sup +/-adenosine triphosphatase (ATPase) from guinea-pig hearts. The ATP-independent cardiac glycoside binding was not influenced by increasing Na/sup +/ concentrations. However, a good correlation was found between the ATP-dependent (/sup 3/H)-ouabain binding and Na/sup +/ concentration. A more detailed analysis of these results revealed two distinct processes involved in this interaction: one ouabain binding process was activated at rather low Na/sup +/ concentrations, (Ksub(0.5) = 4.5 mM); this type of (/sup 3/H)-ouabain binding was strongly correlated to the Na/sup +/ concentration necessary for half maximum phosphorylation (Ksub(0.5) = 1 mM). The other ouabain binding process was predominant at high Na/sup +/ concentrations (Ksub(0.5 = 69 mM). On the basis of the commonly accepted ATPase reaction cycle a model for the interaction of cardiac glycosides with the Na/sup +/-K/sup +/-ATPase is proposed, assuming two different binding sites for cardiac glycosides (E/sub 2/ -P and Esub(l) -P) and involving a translocation of these drugs from an outer to an inner compartment of the cell membrane.

  17. Energy dependence of the reactions K/sup 0/sub(L)p. -->. K/sup 0/sub(S)p,. pi. /sup +/. lambda. ,. pi. /sup +/. sigma. /sup 0/ from 1540 to 1610 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Engler, A; Keyes, G; Kraemer, R W; Schlereth, J; Tanaka, M [Carnegie-Mellon Univ., Pittsburgh, Pa. (USA); Cho, Y; Derrick, M; Lissauer, D; Miller, R J; Smith, R P [Argonne National Lab., Ill. (USA)

    1976-07-19

    The reactions K/sup 0/sup(L)p..-->..K/sup 0/sub(S)p, ..pi../sup +/..lambda.., ..pi../sup +/..sigma../sup 0/ have been measured for center-of-mass energies from 1540 to 1610 MeV. Channel cross sections and coefficients of the Legendre polynomial expansion of the differential cross sections and hyperon polarizations are presented. No evidence is seen in the ..pi lambda.. channel for the suggested 3/2/sup -/ resonance at 1580 MeV. The cross section for the K/sup 0/sub(S)p channel shows an energy dependence which is not predicted by the existing phase shift solutions based on charged kaon data.

  18. Energy transfer of the quantum-cutter couple Pr{sup 3+}–Mn{sup 2+} in CaF{sub 2}:Pr{sup 3+}, Mn{sup 2+} nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Kuzmanoski, Ana [Karlsruhe Institute of Technology (KIT), Institute of Inorganic Chemistry, Engesserstraße 15, D-76131 Karlsruhe (Germany); Pankratov, Vladimir, E-mail: vpank@latnet.lv [Research Center of Molecular Materials, University of Oulu, PO Box 3000, 90014 Oulu (Finland); Feldmann, Claus, E-mail: claus.feldmann@kit.edu [Karlsruhe Institute of Technology (KIT), Institute of Inorganic Chemistry, Engesserstraße 15, D-76131 Karlsruhe (Germany)

    2016-11-15

    CaF{sub 2}:Pr (1 mol%), CaF{sub 2}:Mn (5 mol%) and CaF{sub 2}:Pr,Mn (1 mol%, 5 mol%) nanoparticles are prepared via a microwave-mediated synthesis in ionic liquids. The nanoparticles are highly crystalline and exhibit particle diameters <50 nm.In contrast to bulk-CaF{sub 2}:Pr,Mn,energy transfer between Pr{sup 3+}and Mn{sup 2+}under {sup 1}S{sub 0}→{sup 1}I{sub 6} relaxation on Pr{sup 3+} and {sup 4}G({sup 4}T{sub 1g})→{sup 6}S(A{sub 1g}) emission of Mn{sup 2+} is observed for the first time. Such energy transfer represents the essential first step of the quantum-cutting cascade via the Pr{sup 3+}–Mn{sup 2+} couple, which is most interesting as both expected photons – {sup 3}P{sub 0}→{sup 3}H{sub 4} emission of Pr{sup 3+}and {sup 4}G({sup 4}T{sub 1g})→{sup 6}S(A{sub 1g}) emission of Mn{sup 2+} – are emitted in the green spectral range. While bulk crystals were said not to show energy transfer due to prohibiting selection rules, vacuum ultraviolet (VUV) spectroscopy of CaF{sub 2}:Pr, Mn nanoparticles firstly proves efficient Pr{sup 3+}→Mn{sup 2+} energy transfer, which can be ascribed to the reduced site symmetry and considerable spin–orbit interaction in the nanocrystals.

  19. Tentative of observation of the {rho}{sup +} {yields} {pi}{sup +} + {gamma} decay mode; Tentative de mise en evidence du mode de desintegration {rho}{sup +} {yields} {pi}{sup +} + {gamma}

    Energy Technology Data Exchange (ETDEWEB)

    Daudin, A.; Jabiol, M.A.; Kochowski, C.; Lewin, C.; Rogozinski, A. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires; Mongelli, S.; Romano, A.; Waloschek, P. [Istituto di Fisica dell' Universita, Bari (Italy)

    1964-07-01

    One of the purposes of the 1.6 GeV/c {pi}{sup +} p experiment, carried out in the 50 cm Saclay hydrogen bubble chamber, was to observe the {rho}{sup +} {yields} {pi}{sup +} {gamma} radiative decay mode in {pi}{sup +} p {yields} {pi}{sup +} p {gamma} interactions. A 6 mm thick lead plate, set at the outgoing part of the chamber, was used to convert {gamma} into e{sup +} e{sup -}. Among the {gamma} observed arising directly from the investigated interactions, no event originates from a {pi}{sup +} {gamma} compound in the region of {rho}{sup +}. This gives an upper limit of 2 per cent for the branching ratio ({rho}{sup +} {yields} {pi}{sup +} {gamma}) / ({rho}{sup +} {yields} {pi}{sup +} {gamma} + {rho}{sup +} {yields} {pi}{sup +} {pi}{sup 0}). (authors) [French] Une experience, dont l'un des buts etait de mettre en evidence le mode de desintegration radiatif du {rho}{sup +} en {pi}{sup +} {gamma} dans les interactions {pi}{sup +} p {yields} p {pi}{sup +} {gamma} a 1,6 GeV/c, a ete effectuee a l'aide de la chambre a bulles a hydrogene liquide de 50 cm de diametre de Saclay. Une plaque de plomb de 6 mm d'epaisseur, servant de convertisseur {gamma} {yields} e{sup +} e{sup -} a ete placee au sein du liquide a la sortie de la chambre. Parmi les y observes issus directement de l'interaction etudiee, aucun ne provient d'un complexe {pi}{sup +} {gamma} ayant la masse du {rho}{sup +}, ce qui fixe la limite superieure du rapport de branchement ({rho}{sup +} {yields} {pi}{sup +} {gamma}) / ({rho}{sup +} {yields} {pi}{sup +} {gamma} + {rho}{sup +} {yields} {pi}{sup +} {pi}{sup 0}) a 2 pour cent. (auteurs)

  20. Extraction of GEN at Q<sup>2sup> = 1 (GeV/c)<sup>2sup> from Measurements of polarized He(pol. e, e')

    Energy Technology Data Exchange (ETDEWEB)

    Jin, Ge [Univ. of Virginia, Charlottesville, VA (United States)

    2011-05-01

    The neutron electric form factor, GEN , is extracted for the first time at Q<sup>2sup> = 1 (GeV/c)<sup>2sup> from polarized <sup>3sup>$\\vec{He}$ ($\\vec{e}$ ,e ') measurements in Hall A at Jefferson Lab. By getting the ratio of asymmetries in longitudinal and transverse quasi-elastic <sup>3sup>$\\vec{He}$($\\vec{e}$,e ' ), the electric and magnetic contributions can be separated. The proton and neutron contributions to the <sup>3sup> He quasi-elastic response functions are calculated in PWIA by Salme? et al., and the neutron electric form factor can be extracted. This method of inclusive scattering becomes feasible for the first time due to the falloff of the other form factors at high Q<sup>2sup> while G$n\\atop{E}$ keeps increasing in units of the dipole form factor. Approximately, 20% uncertainty is achieved in the extraction largely contributed by the statistical uncertainties from 3 days of data-taking. All aspects of the measurement will be discussed in this thesis including theoretical model, experiment setup and the details in the analysis.

  1. Synthesis of (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)olivetolic acid, methyl (1'-/sup 13/C)olivetolate and (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)cannabigerolic acid

    Energy Technology Data Exchange (ETDEWEB)

    Porwoll, J P; Leete, E [Minnesota Univ., Minneapolis (USA). Dept. of Chemistry

    1985-03-01

    Potential advanced intermediates in the biosynthesis of delta/sup 9/-tetrahydrocannabinol, the major psychoactive principle of marijuana, have been synthesized labeled with two contiguous /sup 13/C atoms and /sup 14/C. Methyl (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)olivetolate was prepared from lithium (/sup 13/C/sub 2/)acetylide and dimethyl (2-/sup 14/C)malonate. Reaction with geranyl bromide afforded methyl (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)cannabigerolate, and hydrolysis of these methyl esters with lithium propyl mercaptide yielded the corresponding labeled acids. The /sup 13/C-/sup 13/C couplings observable in the /sup 13/C NMR spectra of these /sup 13/C-enriched compounds and their synthetic precursors are recorded. Methyl (1'-/sup 14/C)olivetolate was prepared from /sup 13/CO/sub 2/ to confirm assignments of the /sup 13/C chemical shifts in the pentyl side chain of these compounds.

  2. Design of a multimodal ({sup 1}H/{sup 23}Na MR/CT) anthropomorphic thorax phantom

    Energy Technology Data Exchange (ETDEWEB)

    Neumann, Wiebke; Lietzmann, Florian; Schad, Lothar R.; Zoellner, Frank G. [Heidelberg Univ., Mannheim (Germany). Computer Assisted Clinical Medicine

    2017-08-01

    This work proposes a modular, anthropomorphic MR and CT thorax phantom that enables the comparison of experimental studies for quantitative evaluation of deformable, multimodal image registration algorithms and realistic multi-nuclear MR imaging techniques. A human thorax phantom was developed with insertable modules representing lung, liver, ribs and additional tracking spheres. The quality of human tissue mimicking characteristics was evaluated for {sup 1}H and {sup 23}Na MR as well as CT imaging. The position of landmarks in the lung lobes was tracked during CT image acquisition at several positions during breathing cycles. {sup 1}H MR measurements of the liver were repeated after seven months to determine long term stability. The modules possess HU, T{sub 1} and T{sub 2} values comparable to human tissues (lung module: -756 ± 148 HU, artificial ribs: 218 ± 56 HU (low CaCO{sub 3} concentration) and 339 ± 121 (high CaCO{sub 3} concentration), liver module: T{sub 1} = 790 ± 28 ms, T{sub 2} = 65 ± 1 ms). Motion analysis showed that the landmarks in the lung lobes follow a 3D trajectory similar to human breathing motion. The tracking spheres are well detectable in both CT and MRI. The parameters of the tracking spheres can be adjusted in the following ranges to result in a distinct signal: HU values from 150 to 900 HU, T{sub 1} relaxation time from 550 ms to 2000 ms, T{sub 2} relaxation time from 40 ms to 200 ms. The presented anthropomorphic multimodal thorax phantom fulfills the demands of a simple, inexpensive system with interchangeable components. In future, the modular design allows for complementing the present set up with additional modules focusing on specific research targets such as perfusion studies, {sup 23}Na MR quantification experiments and an increasing level of complexity for motion studies.

  3. Spin-parity structure of the (K pi pi )/sup 0/ system produced in the charge-exchange reaction K/sup -/p to (K/sup 0/ pi /sup +/ pi /sup -/) n at 42 GeV/c

    CERN Document Server

    Vergeest, J S M; Chaloupka, V; Engelen, J J; Gavillet, P; Gay, J B; Hemingway, R J; Jongejans, B; Kittel, E W; Losty, Michael J; Metzger, W J; Tiecke, H G; Voorthuis, H; Wolters, G F

    1976-01-01

    A partial wave analysis of the K/sup 0/ pi /sup +/ pi /sup -/ system produced in the charge exchange reaction K/sup -/p to (K/sup 0/ pi /sup +/ pi /sup -/)n at 4.2 GeV/c has been performed both as a function of K pi pi mass and of t'. The 1/sup +/S wave forms the largest contribution to the K pi pi system and peaks at roughly the same mass as the Q in diffractive K pi pi production. The polarization properties of the 1/sup +/S(K* pi ) and 1/sup +/S(K rho ) waves differ from those of the diffractive 1/sup +/ wave. There is some evidence for a resonance contribution to 1/sup +/S(K* pi ). The strong 2/sup +/ wave is identified with K*(1420) and the K rho /K* pi decay branching ratio determined to be 0.36+or-0.10. An enhancement with spin-parity 1 /sup -/ is observed under the K*(1420). (14 refs).

  4. Measurement of the W{sup +}W{sup -} diboson production cross-section with the ATLAS experiment at the large hadron collider

    Energy Technology Data Exchange (ETDEWEB)

    Ebke, Johannes

    2012-08-02

    This thesis presents the first measurement of the W{sup +}W{sup -} production cross section in proton-proton collisions at {radical}(s)=7 TeV using the complete data set of 4.7 fb{sup -1} collected by the ATLAS detector at the LHC in the year 2011. Three di-leptonic decay channels of the W{sup +}W{sup -} pairs are used for this analysis: decays into two electrons, two muons, and decays into one electron and one muon. For each channel, a region with a high fraction of W{sup +}W{sup -} events is selected and contributions from background processes are estimated using Monte Carlo simulations and data-driven techniques. In total, 1524 W{sup +}W{sup -} candidate events are selected, with an estimated background of 545 {+-} 52 events. The result of the measurement is: {sigma}(pp {yields} W{sup +}W{sup -})=52.6{+-}2.1(stat){+-}4.5(syst){+-}2.1(lumi) pb This is compatible with the Standard Model cross-section prediction at next-to-leading order of {sigma}(pp {yields} W{sup +}W{sup -})=47.0{sup +2.0}{sub -1.5} pb.

  5. Measurement of the effective B{sub s}{sup 0}{yields}K{sup +}K{sup -} lifetime

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Universite, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Universite, Universite Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Anderson, J. [Physik-Institut, Universitaet Zuerich, Zuerich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Aquines Gutierrez, O. [Max-Planck-Institut fuer Kernphysik (MPIK), Heidelberg (Germany); Archilli, F. [Laboratori Nazionali dell' INFN di Frascati, Frascati (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Arrabito, L. [CC-IN2P3, CNRS/IN2P3, Lyon-Villeurbanne (France); and others

    2012-02-01

    A measurement of the effective B{sub s}{sup 0}{yields}K{sup +}K{sup -} lifetime is presented using approximately 37 pb{sup -1} of data collected by LHCb during 2010. This quantity can be used to put constraints on contributions from processes beyond the Standard Model in the B{sub s}{sup 0} meson system and is determined by two complementary approaches as {tau}{sub KK}=1.440{+-}0.096 (stat){+-}0.008 (syst){+-}0.003 (model) ps.

  6. Research for the deep inelastic collision induced by 93 MeV /sup 14/N on /sup n//sup a//sup t/Ca

    Energy Technology Data Exchange (ETDEWEB)

    Shu-Zhi, Yin; Yong-Tai, Zhu; Wen-Qing, Shen; Zhong-Yan, Guo; Wen-Long, Zhan; Wei-Min, Qiao; En-Chiu, Wu; Zhi-hao, Zheng

    1987-03-01

    The projectile-like fragments produced by 93 MeV /sup 14/N on /sup n//sup a//sup t/Ca have been measured with a large area position sensitive ionization chamber. Energy spectra, angular distributions and contour plots of d/sup 3/sigma/d..cap omega..dEdZ and TKE-theta plane for various elements from Li to Mg have been obtained. The variances of the charge distributions sigma/sub z//sup 2/ as a function of the dissipated energy have been deduced too. In the framework of a simple diffusion model the experimental results have been anlaysed and discussed.

  7. Tellurium-123m-labeled isosteres of palmitoleic and oleic acids show high myocardial uptake

    International Nuclear Information System (INIS)

    Knapp, F.F. Jr.; Ambrose, K.R.; Callahan, A.P.; Grigsby, R.A.; Irgolic, K.J.

    1979-01-01

    These studies were directed at determining if the telluro fatty acids prepared by the isosteric replacement of the Δ 9 -double bonds of oleic and palmitoleic acids with /sup 123m/Te would show heart uptake in rats. The isostere of palmitoleic acid, 9-tellurapentadecanoic acid(II), was prepared by basic hydrolysis of the product formed by the coupling of /sup 123m/Te-sodium hexyl tellurol with methyl-8-bromooctadecanoate. Similarly, the isostere of oleic acid, 9-telluraheptadecanoic acid(IV), was prepared by the same route beginning with the reaction of /sup 123m/Te-sodium octyl tellurol with methyl-8-bromooctadecanoate. Both /sup 123m/Te-(II) and /sup 123m/Te-(IV) showed remarkably high heart uptake in rats (2 to 3% dose/gm) ten minutes after intravenous administration, and the heart/blood ratios were high (20-30/1). Finally, the hearts of rats injected with /sup 123m/Te-(IV) have been clearly imaged with a rectilinear scanner

  8. Amplitude analysis for the process K/sup -/p to ( pi /sup +/ pi /sup - /)/sub s-wave/ Sigma /sup 0/(1385)

    CERN Document Server

    Barreiro, F; Hemingway, R J; Holmgren, S O; Kluyver, J G; Losty, Michael J; Massaro, G G G; Timmermans, J; Van de Walle, R T; Zalewski, K

    1977-01-01

    Transversity amplitudes and spin density matrix elements are determined for the process K/sup -/p to ( pi /sup +/ pi /sup -/) Sigma /sup 0/(1385)/sub s-wave/. Predictions of the additive quark model and of duality diagrams are tested and found consistent with the data; this is the first information about the applicability of these models to processes where a scalar object is produced at the mesonic vertex. (5 refs).

  9. Study of the V{sup 51} (p,n)Cr{sup 51} reaction and the energy levels in Cr{sup 51}; Etude de la reaction {sup 51}V (p,n){sup 51}Cr et contribution a la spectroscopie de {sup 51}Cr

    Energy Technology Data Exchange (ETDEWEB)

    Cassacnou, Y [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1966-07-01

    Neutrons and gamma rays from the reaction {sup 51}V(p,n){sup 51}Cr have been studied between 2.3 and 5.1 MeV Energy levels of {sup 51}Cr at 0.75, 1.15, 1.35, 1.47 and 1.56 MeV and unresolved levels at 1.94, 2.4, 2.75 and 2.9 MeV are observed. The gamma ray cascades of the low-lying states of {sup 51}Cr up to 2.5 MeV excitation energy have been completely determined through coincidence measurements. From the cascade ratios and gamma ray yields, excitation functions for the {sup 51}V(p,n){sup 51}Cr reactions, leading to the five lowest levels of {sup 51}Cr have been obtained from reaction threshold to 4.6 MeV. The analysis of cross section fluctuations with good resolution shows they are due to the excitation of unresolved compound nucleus isolated resonances. From the decay scheme and an Hauser-Feshbach calculation of the {sup 51}V(p,n) excitation functions, spin assignments of 3/2{sup -}, or 5/2{sup -} (0.75 MeV), 7/2{sup -} (1.15 MeV), 3/2{sup -} (1.35 MeV), 5/2{sup -} (1.47 MeV) are proposed. (author) [French] La reaction {sup 51}V(p,n){sup 51}Cr a ete etudiee entre 2,3 et 5,1 MeV en detectant les neutrons et le rayonnement gamma de desexcitation des niveaux de {sup 51}Cr a 0,75, 1,15, 1,35, 1,47 et 1,56 MeV et de groupes non resolus de niveaux a 1,94, 2,4, 2,75 et 2,9 MeV. Des mesures de coincidence ont permis de determiner completement les desexcitations en cascade dans {sup 51}Cr jusqu'a 2,5 MeV et d'etablir, a partir des mesures de rayonnement gamma, les fonctions d'excitation des reactions {sup 51}V(p,n){sup 51}Cr formant les cinq premiers niveaux de {sup 51}Cr depuis le seuil jusqu'a 4,6 MeV. L'analyse en bonne resolution des fluctuations observees sur les sections efficaces montrent qu'elles sont dues a des resonances isolees du noyau compose non resolubles dans cette experience. Le schema de desexcitation de {sup 51}Cr et un calcul Hauser-Feshbach des fonctions d'excitation conduisent a proposer les spins suivants: 3/2{sup -} ou 5/2{sup -} pour le niveau

  10. Determination of proton-induced production cross sections and production rates of {sup 129}I from Te

    Energy Technology Data Exchange (ETDEWEB)

    Schnabel, C.; Lopez-Guitierrez, J.M.; Suter, M. [Eidgenoessische Technische Hochschule, Zurich (Switzerland); Synal, H.A. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Gloris, M.; Leya, I.; Michel, R. [Hannover Univ. (Germany); Herpers, U. [Koeln Univ. (Germany)

    1997-09-01

    In order to model the production of {sup 129}I in meteoroids, proton-induced production cross sections in the medium range of {sup 129}I from Te as well as production from meteoroid simulation experiments have been determined. {sup 129}I is a very important cosmogenic nuclide to study the constancy of cosmic radiation on long time scales. (author) 2 figs., 2 refs.

  11. Proton scattering from unstable nuclei {sup 20}O, {sup 30}S, {sup 34}Ar: experimental study and models; Diffusion de protons sur les noyaux instables {sup 20}O, {sup 30}S, {sup 34}Ar: etude experimentale et developpement de modeles

    Energy Technology Data Exchange (ETDEWEB)

    Khan, Elias [Institut de Physique Nucleaire, CNRS - IN2P3, Universite Paris - Sud, 91406 Orsay Cedex (France)

    2000-01-28

    Elastic and inelastic proton scattering from the unstable nuclei {sup 20}O, {sup 30}S and {sup 34}Ar were measured in inverse kinematics at the Grand Accelerateur National d'Ions Lourds. Secondary beams of {sup 20}O at 43 MeV/A, {sup 30}S at 53 MeV/A and {sup 34}Ar at 47 MeV/A impinged on a (CH{sub 2}){sub n} target. Recoiling protons were detected in the silicon strip array MUST. Energies and angular distributions of the first 2{sup +} and 3{sup -} states were measured. A phenomenological analysis yields values of the deformation parameters {beta}{sub 2} and {beta}{sub 3} of 0.55 (6) and 0.35 (5) for {sup 20}O, 0.32 (3) and 0.22 (4) for {sup 30}S, 0.27 (2) and 0.39 (3) for {sup 34}Ar, respectively, and allows the extraction of the ratio of neutron to proton transition matrix elements (M{sub n}/M{sub p})/(N/Z) for 2{sup +} states: 2.35 (37) for {sup 20}O, 0.93 (20) for {sup 30}S and 1.35 (28) for {sup 34}Ar. Therefore the proton rich nuclei {sup 30}S and {sup 34}Ar show a 2{sup +} excitation of isoscalar character whereas the excitation of {sup 20}O is of isovector character. In order to perform a microscopic analysis of the data, we have developed a QRPA model, using three Skyrme interaction: SIII, SG2, SLy4. This model reproduces measured B(EL) values for the oxygen, sulfur and argon isotopic chains, whereas RPA calculations, which do not take pairing into account, underestimate these values. In the case of the QRPA model the energies of the first 2{sup +} state are overestimated by about 1 MeV, but the evolution along the isotopic chains is well reproduced. (M{sub n}/M{sub p})/(N/Z) ratios for the first 2{sup +} state deduced from the microscopic analysis using QRPA are 1.98 for {sup 20}O, 1.05 for {sup 30}S and 1.00 for {sup 34}Ar, in agreement with the conclusions of the phenomenological analysis. However important discrepancies are observed between the two types of analysis for other isotopes, in particular neutron rich argon and sulfur nuclei. (author)

  12. Re-measurement of the half-life of sup 7 sup 9 Se

    CERN Document Server

    Jiang Song Sheng; Diao Li Jun; Li Chun Shen; GouJingRu; Wu Shao Yon

    2002-01-01

    A new attempt has been made for the re-measurement of the half-life of sup 7 sup 9 Se. We made two major improvements over our earlier sup 7 sup 9 Se half-life determination (Nucl. Instr. and Meth. B 123 (1997) 403). Firstly, the half-life of sup 7 sup 9 Se was measured relative to the precisely known half-life of sup 7 sup 5 Se, rather than an absolute measurement of sup 7 sup 9 Se/Se. Secondly, the Projectile X-ray Detection technique was used for the separation of sup 7 sup 9 Se from its isobar, sup 7 sup 9 Br, rather than measuring sup 8 sup 1 Br for the deduction of sup 7 sup 9 Br interference, and this technique was also used for separation of sup 7 sup 5 Se and its isobar, sup 7 sup 5 As. A detailed description of the sample preparations, experimental setup and measurements are given. The re-measured half-life of sup 7 sup 9 Se was (2.95+-0.38)x10 sup 5 a, about a factor of 3 lower than the previous value, 1.1x10 sup 6 a. The problems in the previous measurement are discussed.

  13. Physics with e sup + e sup - Linear Colliders

    CERN Document Server

    Barklow, T

    2003-01-01

    We describe the physics potential of e sup + e sup - linear colliders in this report. These machines are planned to operate in the first phase at a center-of-mass energy of 500 GeV, before being scaled up to about 1 TeV. In the second phase of the operation, a final energy of about 2 TeV is expected. The machines will allow us to perform precision tests of the heavy particles in the Standard Model, the top quark and the electroweak bosons. They are ideal facilities for exploring the properties of Higgs particles, in particular in the intermediate mass range. New vector bosons and novel matter particles in extended gauge theories can be searched for and studied thoroughly. The machines provide unique opportunities for the discovery of particles in supersymmetric extensions of the Standard Model, the spectrum of Higgs particles, the supersymmetric partners of the electroweak gauge and Higgs bosons, and of the matter particles. High precision analyses of their properties and interactions will allow for extrapola...

  14. Study of the production of {sup 177}Lu through {sup 176}Yb (n, {gamma}) {sup 177}Yb {yields} {sup 177}Lu nuclear reaction

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Giovana Pasqualini da; Osso Junior, Joao Alberto [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)]. E-mail: gpsilva@ipen.br; jaosso@ipen.br

    2007-07-01

    The beta minus emitter {sup 177}Lu is a promising therapeutic radioisotope for the curative treatment of cancer using labelled proteins. It has a half - life of T{sub 1/2} = 6.71 day and maximum and average {beta}{sup -} energies of 421 and 133 keV, resulting in a short range of radiation in tissue. The decay is accompanied by the emission of low energy {gamma}-radiation with 208.3 keV (11%) and 113 keV (6.4%) suitable for simultaneous imaging, {sup 177}Lu can be produced by two different routes, namely, by irradiation of natural Lu{sub 2}O{sub 3} target ({sup 176}Lu, 2.6%) or enriched (in {sup 176}Lu) Lu{sub 2}O{sub 3} target, as also by irradiation of Yb target (Yb{sub 2}O{sub 3}) followed by radiochemical separation of {sup 177}Lu from Yb isotopes. The objective of this work is to study the production of {sup 177}Lu through the indirect {sup 176}Yb(n,{gamma}){sup 177}Yb {yields} {sup 177}Lu nuclear reaction. The results of the production yield of {sup 177}Lu will be shown and compared with the direct reaction. The method of choice for the chemical separation between Lu and Yb was the ion exchange, using an cation exchange resin in Cl{sup -} form and {alpha}-HIBA as eluent. Preliminary results showed a good separation of {sup 177}Lu from Yb{sub 2}O{sub 3} indirect targets. (author)

  15. Applicability of a portable CdTe and NaI (Tl) spectrometer for activity measure; Aplicabilidade de um espectrometro portatil de CdTe e NaI (Tl) para a medida da atividade de Cesio-137 ({sup 137}Cs) e Berilio-7 ({sup 7}Be)

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Jaquiel Salvi

    2005-02-15

    In this work it was studied the application of an in situ gamma spectrometer (ROVER) of Amptek Inc., composed by a Cadmium Telluride detector (CdTe) of 3 mm x 3 mm x 1 mm and a 30 mm x 30 mm Sodium Iodide detector doped with Thallium [NaI (Tl)). The radioactive sources used were type pastille, sealed in aluminum and polyethylene, of {sup 241}Am, {sup 133}Ba, {sup 152}Eu, 3 sources of {sup 137}Cs and soil samples contaminated with {sup 137}Cs. It was performed a factorial planning 2{sup 3} to optimize the in situ spectrometry system. This way it was determined that the best temperature for CdTe crystal operation is -22, deg C, with Shaping Time of 3 {mu}S and Rise Time Discrimination (RTD) with value 3. With the help of the certified radioactive sources, we determined the efficiency curve of the two detectors. The CdTe detector was positioned at the standard distance of 1 meter of the sources and also at 4.15 cm. The NaI (Tl) detector was also positioned at the standard distance of 1 meter of the sources and at 2.8 cm. Measures were performed to determine the Minimum Detectable Activity (MDA) for both detectors. For the pastille type sources, the {sup 137}Cs MDA for the CdTe detector at 4.15 cm, analyzing the energy line of 32 keV, was 6 kBq and at 1 meter of the {sup 137}Cs source, analyzing the line of 661.65 keV, the MDA was 67 kBq. For soil samples, CdTe detector at 4.15 cm presented a MDA of 693 kBq.kg-l for the line of 32 keV, and for the soil sample {sup 7}Be content the MDA found was 2867 Bq.kg{sup -1} at 4.15 cm. For the NaI (Tl) detector, analyzing the line of 661.65 keV, the {sup 137}Cs MDA for pastille type source at 1 meter of distance was 7 kBq, and for soil sample at 2.8 cm the measured {sup 137}Cs MDA was 71 Bq.kg{sup -1}. For the soil sample {sup 7}Be content, at 2.8 cm of the Nal (Tl) detector, the obtained MDA was 91 Bq.kg{sup -1}. Due to the minimum detectable activities found for the two detectors, we concluded that the employed in situ gamma

  16. Multi-year Surface Deposition of {sup 210}Pb and {sup 210}Po at Lisbon - Atmospheric Depositions of {sup 210}Pb and {sup 210}Po in Lisbon, Portugal

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Fernando P.; Oliveira, Joao M.; Alberto, G. [Instituto Superior Tecnico/ Campus Tecnologico e Nuclear, Universidade Tecnica de Lisboa, E.N. 10, 2686-953 Sacavem (Portugal)

    2014-07-01

    The long lived radon daughters {sup 210}Pb and {sup 210}Po were determined in samples of total atmospheric depositions obtained with surface collectors continuously operated during 5 years, near Lisbon. The average annual {sup 210}Pb flux was 66±12 Bq m{sup -2}, and the average annual {sup 210}Po flux was 8±3 Bq m{sup -2}, with an overall {sup 210}Po/{sup 210}Pb activity ratio of 0.15±0.06. Direct determination of the {sup 210}Pb atmospheric flux was compared with the {sup 210}Pb excess determined in soil surface layers along with atmospheric depositions of {sup 137}Cs. The deposition of atmospheric {sup 210}Pb was positively correlated with seasonal rainfall, while {sup 210}Po was mainly originated in soil particles re-suspension throughout the year and also in seasonal forest fires. Unusually high {sup 210}Po/{sup 210}Pb activity ratios, higher than unity, were occasionally recorded in atmospheric depositions and the sources and causes are discussed. Long time-series of {sup 210}Pb and {sup 210}Po deposition fluxes, as presented herein are useful to test and constrain parameters of the atmospheric Global Circulation Models. (authors)

  17. The nuclear structure of [sup 229]Pa from the [sup 231]Pa(p,t)[sup 229]Pa and [sup 230]Th(p,2n[gamma])[sup 229]Pa reactions

    Energy Technology Data Exchange (ETDEWEB)

    Levon, A.I. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); De Boer, J. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Graw, G. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Hertenberger, R. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Hofer, D. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Kvasil, J. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Loesch, A. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Mueller-Zanotti, E. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Wuerkner, M. (Sektion Physik, University of Munich, D-85748 Garching (Germany)); Baltzer, H. (Institut fuer Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn (Germany)); Grafen, V. (Institut fuer Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn (Germany)); Guenther, C. (Institut fuer Strahlen- und Kernphysik, University of

    1994-08-29

    The level structure of the [sup 229]Pa nucleus has been investigated by means of the [sup 231]Pa(p,t)[sup 229]Pa and [sup 230]Th(p,2n[gamma])[sup 229]Pa reactions. Triton angular-distribution measurements were subjected to a CCBA analysis and combined with the results of in-beam conversion electron and [gamma]-ray spectroscopy to establish a level scheme. Two low-lying bands of opposite parity were observed up to spins (23/2)[sup -] and (17/2)[sup +], respectively. Rotational bands built on some 0[sup +] excitations of the even-even core can be assigned. The lowest states of three further low-lying bands are observed. The level scheme is interpreted in terms of an octupole-deformed core with an unpaired proton. From the E1/E2 branching ratio the electric dipole moment can be deduced vertical stroke D[sub 0]vertical stroke =(0.09 [+-]0.04) e .fm. ((orig.))

  18. Analyses of {ital D}{sup +}{r_arrow}{ital K}{sup 0}{sub {ital S}}{ital K}{sup +} and {ital D}{sup +}{r_arrow}{ital K}{sup 0}{sub {ital S}}{pi}{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Bishai, M.; Fast, J.; Gerndt, E.; Hinson, J.; Menon, N.; Miller, D.; Shibata, E.; Shipsey, I.; Yurko, M.; Kwak, N. [Purdue University, West Lafayette, Indiana 47907 (United States); Gibbons, L.; Johnson, S.; Kwon, Y.; Roberts, S.; Thorndike, E. [University of Rochester, Rochester, New York 14627 (United States); Jessop, C.; Lingel, K.; Marsiske, H.; Perl, M.; Schaffner, S.; Ugolini, D.; Wang, R.; Zhou, X.; Severini, H.; Wappler, F. [Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States); Coan, T.; Fadeyev, V.; Korolkov, I.; Maravin, Y.; Narsky, I.; Shelkov, V.; Staeck, J.; Stroynowski, R.; Volobouev, I.; Ye, J. [Southern Methodist University, Dallas, Texas 75275 (United States); Artuso, M.; Efimov, A.; Frasconi, F.; Gao, M.; Goldberg, M.; He, D.; Kopp, S.; Moneti, G.; Mountain, R.; Mukhin, Y.; Schuh, S.; Skwarnicki, T.; Stone, S.; Viehhauser, G.; Xing, X. [Syracuse University, Syracuse, New York 13244 (United States); Bartelt, J.; Csorna, S.; Jain, V.; Marka, S. [Vanderbilt University, Nashville, Tennessee 37235 (United States); Freyberger, A.; Gibaut, D.; Godang, R.; Kinoshita, K.; Lai, I.; Pomianowski, P.; Schrenk, S. [Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States); Bonvicini, G.; Cinabro, D.; Greene, R.; Perera, L. [Wayne State University, Detroit, Michigan 48202 (United States); Barish, B.; Chadha, M.; Chan, S.; Eigen, G.; Miller, J.; OGrady, C.; Schmidtler, M.; Urheim, J.; Weinstein, A.; Wuerthwein, F. [California Institute of Technology, Pasadena, California 91125 (United States); Asner, D.; Bliss, D.; Brower, W.; Masek, G.; Paar, H.; Sharma, V. [University of California, San Diego, La Jolla, California 92093 (United States); Gronberg, J.; Kutschke, R.; Lange, D.; Menary, S.; Morrison, R.; Nelson, H.; Nelson, T.; Qiao, C.; Richman, J.; Roberts, D.; Ryd, A.; Witherell, M. [University of California, Santa Barbara, California 93106 (United States)

    1997-04-01

    Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we present new measurements of the branching fractions for D{sup +}{r_arrow}K{sub S}K{sup +} and D{sup +}{r_arrow}K{sub S}{pi}{sup +}. These results are combined with other CLEO measurements to extract the ratios of isospin amplitudes and phase shifts for D{r_arrow}KK and D{r_arrow}K{pi}. {copyright} {ital 1997} {ital The American Physical Society}

  19. Transuranic and tracer simulant resuspension. [/sup 238/Pu, /sup 239/Pu, /sup 240/Pu

    Energy Technology Data Exchange (ETDEWEB)

    Sehmel, G. A.

    1977-07-01

    Plutonium resuspension results are summarized for experiments conducted at Rocky Flats, onsite on the Hanford reservation, and for winds blowing from offsite onto the Hanford reservation near the Prosser barricade boundary. In each case, plutonium resuspension was shown by increased airborne plutonium concentrations as a function of either wind speed or as compared to fallout levels. All measured airborne concentrations were below maximum permissible concentrations (MPC). Both plutonium and cesium concentrations on airborne soil were normalized by the quantity of airborne soil sampled. Airborne radionuclide concentrations in ..mu..Ci/g were related to published values for radionuclide concentrations on surface soils. For this ratio of radionuclide concentration per gram on airborne soil divided by that for ground surface soil, there are eight orders of magnitude uncertainty from 10/sup -4/ to 10/sup 4/. Horizontal plutonium fluxes on airborne nonrespirable soils at all three sites were bracketed within the same three to four orders of magnitude from 10/sup -7/ to 10/sup -3/ ..mu..Ci/(m/sup 2/ day) for plutonium-239 and 10/sup -8/ to 10/sup -5/ ..mu..Ci/(m/sup 2/ day) for plutonium-238. These are the entire experimental base for nonrespirable airborne plutonium transport. Airborne respirable plutonium-239 concentrations increased with wind speed for a southeast wind direction coming from offsite near the Hanford reservation Prosser barricade. Airborne plutonium fluxes on nonrespirable particles had isotopic ratios, /sup 240/Pu//sup 239 +240/Pu, similar to weapons grade plutonium rather than fallout plutonium. Resuspension rates were summarized for controlled inert particle tracer simulant experiments. Wind resuspension rates for tracers increased with wind speed to about the fifth power.

  20. Study of coherent diffractive production reactions of p+C{yields}[Y{sup 0}{Kappa}{sup +}]+C type and observation of narrow structures in {Sigma}(1385){sup 0}{Kappa}{sup +} and {Sigma}{sup 0}{Kappa}{sup +} effective mass spectra

    Energy Technology Data Exchange (ETDEWEB)

    Golovkin, S.V.; Kozhevnikov, A.P.; Kubarovsky, V.P. [Institute for High Energy Physics, Protvino (Russian Federation)] [and others; SPHINX Collaboration (IHEP-ITEP)

    1995-11-01

    In the experiments at the SPHINX facility in 70 GeV proton beam of the IHEP accelerator the coherent diffractive production reactions on carbon nuclei p + C {yields} [{Sigma}(1385){sup 0}K{sup +}] + C and p + C {yields} [{Sigma}{sup 0}K{sup +}] + C were investigated. The evidences for new baryon states were obtained in the study of hyperon-kaon effective mass spectra in these two reactions: X(2050) with mass M = (2052 {+-} 6) MeV and width {Gamma} = (35{sup +22}{sub -35}) MeV in M[{Sigma}(1385){sup 0}K{sup +}] and X(2000) with M = 1999 {+-} 6 MeV and {Gamma} = 91 {+-} 17 MeV in M[{Sigma}{sup 0}K{sup +}]. The unusual features of these massive states (small enough decay widths, anomalously large branching ratios for decays with strange particles emission) make them very serious candidates for cryptoexotic pentaquark baryons with hidden strangeness. (orig.)

  1. Measurement of the time-dependent CP asymmetry in B{sup 0}→J/ψK{sub S}{sup 0} decays

    Energy Technology Data Exchange (ETDEWEB)

    Aaij, R. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Abellan Beteta, C. [Universitat de Barcelona, Barcelona (Spain); Adametz, A. [Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg (Germany); Adeva, B. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Adinolfi, M. [H.H. Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom); Adrover, C. [CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France); Affolder, A. [Oliver Lodge Laboratory, University of Liverpool, Liverpool (United Kingdom); Ajaltouni, Z. [Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand (France); Albrecht, J.; Alessio, F. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Alexander, M. [School of Physics and Astronomy, University of Glasgow, Glasgow (United Kingdom); Ali, S. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); Alkhazov, G. [Petersburg Nuclear Physics Institute (PNPI), Gatchina (Russian Federation); Alvarez Cartelle, P. [Universidad de Santiago de Compostela, Santiago de Compostela (Spain); Alves, A.A. [Sezione INFN di Roma La Sapienza, Roma (Italy); Amato, S. [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro (Brazil); Amhis, Y. [Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne (Switzerland); Anderlini, L. [Sezione INFN di Firenze, Firenze (Italy); Anderson, J. [Physik-Institut, Universität Zürich, Zürich (Switzerland); Appleby, R.B. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); and others

    2013-04-10

    This Letter reports a measurement of the CP violation observables S{sub J/ψK{sub S{sup 0}}} and C{sub J/ψK{sub S{sup 0}}} in the decay channel B{sup 0}→J/ψK{sub S}{sup 0} performed with 1.0 fb{sup −1} of pp collisions at √(s)=7 TeV collected by the LHCb experiment. The fit to the data yields S{sub J/ψK{sub S{sup 0}}}=0.73±0.07(stat)±0.04(syst) and C{sub J/ψK{sub S{sup 0}}}=0.03±0.09(stat)±0.01(syst). Both values are consistent with the current world averages and within expectations from the Standard Model.

  2. Study of CP violation in B<sup>0sup>s → J/ΨΦ decays at D0

    Energy Technology Data Exchange (ETDEWEB)

    Strom, Derek A. [Northwestern Univ., Evanston, IL (United States)

    2008-12-01

    In a universe dominated by matter, the source of CP violation may explain one of the greatest mysteries in particle physics: what happened to the antimatter? The Standard Model successfully describes CP violation in the B<sup>+> and Bd<sup>0sup> systems, yet insufficiently accounts for the observed matter-antimatter asymmetry. The Standard Model predicts a small value of CP violation in the Bs<sup>0sup> meson system, which has only recently been experimentally tested. A measurement of large, anomalous CP violation in the Bs<sup>0sup> system would be a clear indication of new physics sources beyond the Standard Model. This dissertation describes a study of CP violation in approximately 2000 Bs<sup>0sup> → J/ΨΦ decays reconstructed in a 2.8 fb<sup>-1sup> data sample collected by the D0 Run II detector at Fermi National Accelerator Laboratory in Batavia, Illinois. This data was provided by p$\\bar{p}$ collisions at √s = 1.96 TeV delivered by the Tevatron accelerator between April 2002 and August 2007. Flavor-tagged Bs<sup>0sup> → J/Ψ(μ<sup>+μ-)Φ(K+K->) decays and an angular analysis are used to study the time evolution of the final state angular distributions. From this analysis, we measure the width difference between the heavy and light mass eigenstates, Bs<sup>L> and Bs<sup>H> , to be ΔΓs = 0.19 ± 0.07 and the CP-violating phase Φs = -0.57-0.30<sup>+0.24sup>.

  3. Radiative corrections to the charged pion-pair production process {pi}{sup -}{gamma} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup -} at low energies

    Energy Technology Data Exchange (ETDEWEB)

    Kaiser, N.; Petschauer, S. [Technische Universitaet Muenchen, Physik-Department T39, Garching (Germany)

    2013-12-15

    We calculate the one-photon loop radiative corrections to the charged pion-pair production process {pi}{sup -}{gamma} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup -}. In the low-energy region this reaction is governed by the chiral pion-pion interaction. The pertinent set of 42 irreducible photon-loop diagrams is calculated by using the package FeynCalc. Electromagnetic counterterms with two independent low-energy constants k{sub 1} and k{sub 2} are included in order to remove the ultraviolet divergences generated by the photon loops. Infrared finiteness of the virtual radiative corrections is achieved by including soft photon radiation below an energy cut-off {Lambda}. The purely electromagnetic interaction of the charged pions mediated by one-photon exchange is also taken into account. The radiative corrections to the total cross section (in the isospin limit) vary between +10% close to threshold and about -1% at a center-of-mass energy of 7m{sub {pi}}. The largest contribution comes from the simple one-photon exchange. Radiative corrections to the {pi}{sup +}{pi}{sup -} and {pi}{sup -}{pi}{sup -} mass spectra are studied as well. The Coulomb singularity of the final-state interaction produces a kink in the dipion mass spectra. The virtual radiative corrections to elastic {pi}{sup -}{pi}{sup -} scattering are derived additionally. (orig.)

  4. D{sup 6}R{sup 4} amplitudes in various dimensions

    Energy Technology Data Exchange (ETDEWEB)

    Pioline, Boris [CERN PH-TH,Case C01600, CERN, CH-1211 Geneva 23 (Switzerland); Sorbonne Universités, UPMC Université Paris 6,UMR 7589, F-75005 Paris (France); Laboratoire de Physique Théorique et Hautes Energies, CNRS UMR 7589,Université Pierre et Marie Curie, 4 place Jussieu, 75252 Paris cedex 05 (France)

    2015-04-13

    Four-graviton couplings in the low energy effective action of type II string vacua compactified on tori are strongly constrained by supersymmetry and U-duality. While the R{sup 4} and D{sup 4}R{sup 4} couplings are known exactly in terms of Langlands-Eisenstein series of the U-duality group, the D{sup 6}R{sup 4} couplings are not nearly as well understood. Exploiting the coincidence of the U-duality group in D=6 with the T-duality group in D=5, we propose an exact formula for the D{sup 6}R{sup 4} couplings in type II string theory compactified on T{sup 4}, in terms of a genus-two modular integral plus a suitable Eisenstein series. The same modular integral computes the two-loop correction to D{sup 6}R{sup 4} in 5 dimensions, but here provides the non-perturbative completion of the known perturbative terms in D=6. This proposal hinges on a systematic re-analysis of the weak coupling and large radius of the D{sup 6}R{sup 4} in all dimensions D≥3, which fills in some gaps and resolves some inconsistencies in earlier studies.

  5. Study of short-range correlation in nuclei via measurement of the <sup>4sup>He(,ee'pp) and <sup>4sup>He(e,e'pn) reaction

    Energy Technology Data Exchange (ETDEWEB)

    Korover, Igor [Tel Aviv Univ., Ramat Aviv (Israel)

    2015-04-01

    This thesis reports on a simultaneous measurement of the <sup>4sup>He(e,e'p), <sup>4sup>He(e,e'pp), and <sup>4sup>He(e,e'pn) reactions at Q<sup>2sup> = 2 (GeV/c)<sup>2sup> and xB > 1 for an (e,e'p) missing momentum range of 400 to 830 MeV/c.

  6. Evaluation of DELTA(1232) components in sup 1 sup 2 C

    CERN Document Server

    Bystritsky, V M; Krechetov, Yu F; Saigushkin, O K; Tabachenko, A N; Schuvalov, E N; Grabmayr, R; Fiks, A I

    2001-01-01

    One measured cross section of sup 1 sup 2 C(gamma, pi sup + p) reaction within DELTA(1232)-isobar range. Data analysis was carried out using model taking account of both nucleon and isobar degrees of freedom of sup 1 sup 2 C nucleus. One makes a conclusion that within high transmitted pulses pi sup + p-pairs are formed during DELTA sup + sup + -isobar direct knocking-out of a nucleus. One estimated the probability to determine DELTA-isobar in sup 1 sup 2 C nucleus ground state equal to 0.018 +- 0.005 DELTA-isobar per nucleon

  7. Transfer of {sup 40}K, {sup 238}U, {sup 210}Pb, and {sup 210}Po from soil to plant in various locations in south of Syria

    Energy Technology Data Exchange (ETDEWEB)

    Al-Masri, M.S. [Atomic Energy Commission of Syria, Damascus, P.O. Box 6091 (Syrian Arab Republic)], E-mail: scientific1@aec.org.sy; Al-Akel, B.; Nashawani, A.; Amin, Y.; Khalifa, K.H.; Al-Ain, F. [Atomic Energy Commission of Syria, Damascus, P.O. Box 6091 (Syrian Arab Republic)

    2008-02-15

    Transfer factors of {sup 40}K, {sup 238}U, {sup 210}Pb, and {sup 210}Po from soil to some agriculture crops in various locations in south of Syria (Dara'a and Assuwaydaa districts) have been determined. Soil and vegetable crops (green pepper, cucumber, tomato, and eggplant), legumes crops (lentil, chickpea, and broad bean), fruit trees (apple, grape, and olives) and cereals (barley and wheat) were collected and analyzed for {sup 238}U, {sup 210}Pb, and {sup 210}Po. The results have shown that higher transfer factors (calculated as Bq kg{sup -1} dry wt. plant material per Bq kg{sup -1} dry wt. soil) for {sup 210}Po, {sup 210}Pb and {sup 238}U were observed in vegetable leaves than fruits and cereals leaves; the highest values of transfer factor (TF) for {sup 238}U were found to be 0.1 for straw of chickpea. Transfer factors for {sup 210}Po varied between 2.8 x 10{sup -2} and 2 in fruits of eggplant and grain of barley, respectively. In addition, several parameters affecting transfer factors of the radionuclides were evaluated. The results can be considered as base values for TF of natural radionuclides in the region.

  8. A simple thick target for production of <sup>89sup>Zr using an <sup>11sup>MeV cyclotron

    Energy Technology Data Exchange (ETDEWEB)

    Link, Jeanne M.; Krohn, Kenneth A.; O' Hara, Matthew J.

    2017-04-01

    The growing interest but limited availability of <sup>89sup>Zr for PET led us to test targets for the <sup>89sup>(p,n) reaction. The goal was an easily constructed target for an 11 MeV Siements cyclotron. Yttrium foils were tested at different thicknesses, angles and currents. A 90 degree foil tolerated 41 microAmp without damage and produced ~800 MBq/hr, >20 mCi, an amount adequate for radiochemistry research and human doses in a widely available accelerator. This method should translate to higher energy cyclotrons.

  9. Synthesis of (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)olivetolic acid, methyl (1'-/sup 13/C)olivetolate and (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)cannabigerolic acid

    Energy Technology Data Exchange (ETDEWEB)

    Porwoll, J.P.; Leete, E. (Minnesota Univ., Minneapolis (USA). Dept. of Chemistry)

    1985-03-01

    Potential advanced intermediates in the biosynthesis of delta/sup 9/-tetrahydrocannabinol, the major psychoactive principle of marijuana, have been synthesized labeled with two contiguous /sup 13/C atoms and /sup 14/C. Methyl (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)olivetolate was prepared from lithium (/sup 13/C/sub 2/)acetylide and dimethyl (2-/sup 14/C)malonate. Reaction with geranyl bromide afforded methyl (5,6-/sup 13/C/sub 2/, 1-/sup 14/C)cannabigerolate, and hydrolysis of these methyl esters with lithium propyl mercaptide yielded the corresponding labeled acids. The /sup 13/C-/sup 13/C couplings observable in the /sup 13/C NMR spectra of these /sup 13/C-enriched compounds and their synthetic precursors are recorded. Methyl (1'-/sup 14/C)olivetolate was prepared from /sup 13/CO/sub 2/ to confirm assignments of the /sup 13/C chemical shifts in the pentyl side chain of these compounds.

  10. Some redox chemistry of HPO sub 2 sup -. and sup. PO sub 3 sup 2- radicals. A pulse radiolysis study

    Energy Technology Data Exchange (ETDEWEB)

    Packer, J.E. (Brunel Univ., Uxbridge (UK). Dept. of Biochemistry); Anderson, R.F. (Mount Vernon Hospital, Northwood (UK). Gray Lab.)

    1990-01-01

    The HO{sup .} radical oxidises hypophosphite and phosphite anions to HPO{sub 2}{sup -.} and {sup .}PO{sub 3}{sup 2-} respectively, but Br{sub 2}{sup -.} and N{sub 3}{sup .} do not. The rates of oxidation of HPO{sub 2}{sup -.} by a series of oxidising agents of known one electron redox potentials decrease with decreasing potential while the corresponding rates for oxidation of {sup .}PO{sub 3}{sup 2-} remain close to the diffusion controlled limit. {sup .}PO{sub 3}{sup 2-} will oxidise cysteine but HPO{sub 2}{sup -.} does not. {sup .}PO{sub 3}{sup 2-} did not oxidise ABTS, ascorbate, or the anion of the vitamin E analogue, trolox. It reduced traces of TMPD{sup +.} in TMPD rather than oxidising the substrate. The one electron redox potentials for oxidation and reduction of {sup .}PO{sub 3}{sup 2-} are calculated in light of recently published redox data on penicillamine. (author).

  11. Alpha decay of neutron-deficient isotopes with 52sup 106/Te (T/sub 1/2/=60 mu s) and /sup 110/Xe

    CERN Document Server

    Schardt, D; Kirchner, R; Klepper, O; Kurcewicz, W; Roeckl, E; Tidemand-Petersson, P

    1981-01-01

    Using /sup 58/Ni(/sup 58/Ni, xpyn) reactions and on-line mass separation, the alpha -decays of very neutron-deficient isotopes of tellurium, iodine, xenon and cesium were studied. The new isotopes /sup 106/Te (T/sub 1/2/=60/sub -10//sup +30/ mu s) and /sup 110/Xe were identified by their alpha -lines of 4160+or-30 keV and 3737+or-30 keV energy, respectively, with the genetic relationship between the two successive alpha -decays being verified experimentally, while for several other alpha -decaying isotopes more precise data were obtained. The observed alpha -decay properties are discussed within the systematics of energy and reduced width. (19 refs).

  12. Precision measurements of the e{sup +}e{sup −}→π{sup +}π{sup −}(γ) cross section with the KLOE detector

    Energy Technology Data Exchange (ETDEWEB)

    Mandaglio, G., E-mail: gmandaglio@unime.it [Centro Siciliano di Fisica Nucleare e Struttura della Materia, 95123-Catania (Italy); Dipartimento di Fisica e di Scienze della Terra, Università di Messina, 98166 Messina (Italy); INFN Sezione di Catania, 95125 Catania (Italy); Babusci, D.; Badoni, D.; Balwierz-Pytko, I.; Bencivenni, G.; Bini, C.; Bloise, C.; Bossi, F.; Branchini, P.; Budano, A.; Caldeira Balkeståhl, L.; Capon, G.; Ceradini, F.; Ciambrone, P.; Czerwiński, E.; Danè, E.; De Lucia, E.; De Robertis, G.; De Santis, A.; Di Domenico, A.; and others

    2014-08-15

    The muon anomalous magnetic moment is one of the most precisely measured quantities in particle physics and a persistent discrepancy of about 3 σ between standard model (SM) prediction and the experimental measurement has been observed. The leading order contribution a{sub μ}{sup hlo} is actually the main source of uncertainty in the theoretical evaluation of the muon anomaly. It is obtained by a dispersion integral using the precision measurement of hadronic cross section. The KLOE experiment at the DAΦNE ϕ−factory in Frascati was the first to exploit Initial State Radiation (ISR) processes to obtain the e{sup +}e{sup −}→π{sup +}π{sup −}(γ) cross section below 1 GeV, that accounts for most (70%) of the leading order contribution to the muon anomaly. In year 2005 and 2008 the KLOE-collaboration has published two measurements of the π{sup +}π{sup −} cross section with the photon in the initial state emitted at small angle, and an independent measurement with the photon emitted at large angle was finalized in year 2011. These measurements were normalized using luminosity from Bhabha. In the last years, a new analysis of KLOE data has been performed for obtaining the pion form factor directly from the bin-by-bin π{sup +}π{sup −}γ to μ{sup +}μ{sup −}γ ratio. We present the results of this new measurement, showing the comparison with our previous measurements, and its impact on the hadronic contribution to the muon anomaly.

  13. Search for Λ{sub b} → K{sup -}μ{sup +} at LHCb

    Energy Technology Data Exchange (ETDEWEB)

    Gruenberg, Oliver

    2017-04-07

    In this thesis the search for the decays Λ{sub b}→K{sup -}μ{sup +} and Ξ{sub b}{sup 0}→K{sup -}μ{sup +} is presented using the Run I data of the LHCb experiment. The decay offers an approach to the description of the matter-antimatter asymmetry in our universe and is based on the Sakharov conditions that predict the existence of processes violating the baryon and lepton number conservation. Especially the measured baryon-to-photo ratio η∼6.10{sup -10} allows to estimate the probability of such processes in this order of magnitude. In the underlying data set including about 50 billion recorded Λ{sub b} decays no signal events are observed and an upper limit on the combined branching fraction is determined at a confidence level of 90%: [B(Λ{sub b}→K{sup -}μ{sup +})+B(Λ{sub b}→K{sup +}μ{sup -})] x (3.1.10{sup -6})/(B(Λ{sub b}→pK{sup -}))<1.95.10{sup -9}. The result is equivalent to the value of [B(Λ{sub b}→K{sup -}μ{sup +})+B(Λ{sub b}→K{sup +}μ{sup -})] but excludes the large uncertainty of B(Λ{sub b}→pK{sup -})∼3.1.10{sup -6} that origins from another measurement. In the Ξ{sup 0}{sub b}→K{sup -}μ{sup +} case the determined upper limit at a confidence level of 90% is (fΞ{sup 0}{sub b})/(fΛ{sub b}) x [B(Ξ{sup 0}{sub b}→K{sup -}μ{sup +})+B(Ξ{sup 0}{sub b}→K{sup +}μ{sup -})] x (3.1.10{sup -6})/(B(Λ{sub b}→pK{sup -}))<1.25.10{sup -9}, and includes the unknown production ratio of Ξ{sup 0}{sub b} to Λ{sub b}. In addition an indication (χ=2.7) for the yet unobserved decay Ξ{sup 0}{sub b}→pK{sup -} is found with 25±10 signal events.

  14. Temporal evolution of {sup 137}Cs{sup +}, K{sup +} and Na{sup +} in fruits of South American tropical species

    Energy Technology Data Exchange (ETDEWEB)

    Cid, A.S. [LARA — Laboratório de Radioecologia, Instituto de Física, Universidade Federal Fluminense, Av. Gal Milton Tavares de Souza, s/no, Gragoatá, 24210-340, Niterói, RJ (Brazil); Anjos, R.M., E-mail: meigikos@if.uff.br [LARA — Laboratório de Radioecologia, Instituto de Física, Universidade Federal Fluminense, Av. Gal Milton Tavares de Souza, s/no, Gragoatá, 24210-340, Niterói, RJ (Brazil); Zamboni, C.B. [Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN), Av. Lineu Prestes 2242, Cidade Universitária, 05508-000, Paulo, SP (Brazil); Velasco, H. [GEA, Instituto de Matemática Aplicada San Luis (IMASL), Universidad Nacional de San Luis, Consejo Nacional de Investigaciones Científicas y Técnicas. Ej. de los Andes 950, D5700HHW San Luis (Argentina); Macario, K. [LARA — Laboratório de Radioecologia, Instituto de Física, Universidade Federal Fluminense, Av. Gal Milton Tavares de Souza, s/no, Gragoatá, 24210-340, Niterói, RJ (Brazil); Rizzotto, M. [GEA, Instituto de Matemática Aplicada San Luis (IMASL), Universidad Nacional de San Luis, Consejo Nacional de Investigaciones Científicas y Técnicas. Ej. de los Andes 950, D5700HHW San Luis (Argentina); and others

    2013-02-01

    Concentrations of {sup 137}Cs, K and Na in fruits of lemon (Citrus limon B.) and of K and Na in fruits of coconut (Cocos nucifera L.) trees were measured by both gamma spectrometry and neutron activation analysis, with the aim to understand the behaviour of monovalent inorganic cations in tropical plants as well as the plant ability to store these elements. Similar amounts of K{sup +} were incorporated by lemon and coconut trees during the growth and ripening processes of its fruits. The K concentration decreased exponentially during the growth of lemons and coconuts, ranging from 13 to 25 g kg{sup −1} dry weight. The incorporation of Na{sup +} differed considerably between the plant species studied. The Na concentration increased linearly during the lemon growth period (0.04 to 0.70 g kg{sup −1} d.w.) and decreased exponentially during the coconut growth period (1.4 to 0.5 g kg{sup −1} d.w.). Even though radiocaesium is not an essential element to plants, our results have shown that {sup 137}Cs incorporation to vegetable tissues is positively correlated to K distribution within the studied tropical plant species, suggesting that the two elements might be assimilated in a similar way, going through the biological cycle together. A mathematical model was developed from the experimental data allowing simulating the incorporation process of monovalent inorganic cations by the fruits of such tropical species. The agreement between the theoretical approach and the experimental values is satisfactory along fruit development. - Highlights: ► Concentrations of {sup 137}Cs, K and Na in fruits of lemon (Citrus limon B.) are presented. ► Concentrations of K and Na in fruits of coconut (Cocos nucifera L.) are also showed. ► We investigated the use of {sup 137}Cs as a tracer for the plant absorption of macronutrients. ► A model was developed to simulate the temporal evolution of {sup 137}Cs, K and Na by fruits. ► This model exhibited close agreement with our

  15. {sup 239}Pu and {sup 240}Pu inventories and {sup 240}Pu/{sup 239}Pu atom ratios in the equatorial Pacific Ocean water column

    Energy Technology Data Exchange (ETDEWEB)

    Yamada, Masatoshi, E-mail: myamada@cc.hirosaki-u.ac.jp [Department of Radiation Chemistry, Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori 036-8564 (Japan); Zheng, Jian [Research Center for Radiation Protection, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555 (Japan)

    2012-07-15

    The {sup 239+240}Pu concentrations and {sup 240}Pu/{sup 239}Pu atom ratios were determined by alpha spectrometry and inductively coupled plasma mass spectrometry for seawater samples from two stations, one at the equator and the other in the equatorial South Pacific. To better understand the fate of Pu isotopes, this study dealt with the contribution of the close-in fallout Pu from the Pacific Proving Grounds (PPG) in water columns of the Pacific Ocean. The {sup 239}Pu, {sup 240}Pu and {sup 239+240}Pu inventories over the depth interval 0-3000 m at the equator station were 10.4, 8.9 and 19.3 Bq m{sup -2}, respectively. Further, no noticeable difference was observed in {sup 239}Pu, {sup 240}Pu and {sup 239+240}Pu inventories over the depth interval 0-3000 m between the two stations. The total {sup 239+240}Pu inventories were significantly higher than the expected cumulative deposition density of global fallout. Water column {sup 239+240}Pu inventories measured in this study were lower than those reported for comparable stations in the Geochemical Ocean Sections Study, indicating that these inventories have been decreasing at average rates of 0.89 {+-} 0.07 and 0.16 {+-} 0.07 Bq m{sup -2} yr{sup -1} at the equator and equatorial South Pacific stations, respectively, from 1973 to 1990. The obtained {sup 240}Pu/{sup 239}Pu atom ratios were higher than the mean global fallout ratio of 0.18. These high atom ratios proved the existence of close-in tropospheric fallout Pu from the PPG in the Marshall Islands. The {sup 239+240}Pu inventories originating from the close-in fallout in the entire water column were estimated to be 11.1 Bq m{sup -2} at the equator station and 7.1 Bq m{sup -2} at the equatorial South Pacific Ocean station, and the relative percentages of close-in fallout Pu were 40% at the former and 34% at the latter. A significant amount of close-in fallout Pu originating from the PPG has been transported to deep layers below the 1000 m depth in the equatorial

  16. Synthesis of three-dimensional flower-like BiOCl:RE{sup 3+} (RE{sup 3+} = Eu{sup 3+}, Sm{sup 3+}) globular microarchitectures and their luminescence properties

    Energy Technology Data Exchange (ETDEWEB)

    Guo, Yang-Yang; Zhang, Zhi-Jun [Department of Physics, Dongguk University, Seoul, 100715 (Korea, Republic of); Zhu, Gang-Qiang [Department of Physics, Shanxi Normal University, Xi’an, 710062 (China); Yang, Woochul, E-mail: wyang@dongguk.edu [Department of Physics, Dongguk University, Seoul, 100715 (Korea, Republic of)

    2016-12-01

    Graphical abstract: - Highlights: • Three-dimensional flower-like Eu{sup 3+} and Sm{sup 3+}-activated BiOCl globular microarchitectures have been synthesized. • Ostwald ripening and recrystallization are responsible for the growth mechanism of BiOCl microarchitectures. • Efficient red-emission from Eu{sup 3+}:BiOCl is observed due to the well-crystallized structures of the microarchitectures. - Abstract: Three-dimensional flower-like Eu{sup 3+} and Sm{sup 3+}-activated BiOCl globular microarchitectures were synthesized by the solvothermal method employing urea as a dispersing agent for the first time. The crystal structure, morphologies and luminescence properties of Eu{sup 3+} and Sm{sup 3+} doped BiOCl have been systematically investigated by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) and spectroscopy, respectively. The unit cell volumes show a nearly linear decrease by about 0.18 and 0.15% with increasing Eu{sup 3+} and Sm{sup 3+} concentration up to 9 mol%, respectively. All of the prepared samples show flower-like globular microarchitectures with an average diameter about 3–5 μm with different Eu{sup 3+} and Sm{sup 3+} concentrations. Possible formation mechanism for the flower-like microarchitectures is proposed on the basis of time-dependent experiment. Both BiOCl:Eu{sup 3+} and BiOCl:Sm{sup 3+} samples show a strong red emission corresponding to the {sup 5}D{sub 0} → {sup 7}F{sub 4} transition (700 nm) of Eu{sup 3+} and {sup 4}G{sub 5/2} → {sup 6}H{sub 7/2} transition (600 nm) of Sm{sup 3+}, respectively. This work sheds some light on the design and preparation of red-emitting phosphors with novel microstructures.

  17. Distribution of {sup 226} Ra, {sup 232} Th, {sup 40} K and {sup 137} Cs in soils of Province of Camaguey, Cuba

    Energy Technology Data Exchange (ETDEWEB)

    Flores, Osvaldo Brigido; Barreras Caballero, Aldo A.; Montalvan Estrada, Adelmo; Queipo Garcia, Maite [Ministerio da Ciencia, Tecnologia y Medio Ambiente, Camaguey (Cuba). Centro de Atencion a la Actividad Nuclear. Lab. de Vigilancia Radiologica Ambiental]. E-mail: sean@caonao.cmw.inf.cu; Zerquera, Juan Tomas [Centro de Proteccion y Higiene de las Radiaciones, La Habana (Cuba)

    2001-07-01

    A survey programme aimed at studying the environmental radioactivity in the Province of Camaguey in the eastern region of Cuba was undertaken. The average concentrations of {sup 226} Ra, {sup 232} Th, and {sup 40} K in the surveyed soils were 26.4, 11.5 and 210 Bq.kg{sup -1}, respectively. The man-made radionuclide found was {sup 137} Cs and its concentration was similar to those reported in regions affected only by global radioactive fallout, (7.9 Bq.kg{sup -1}). Radiological measurements carried out with a portable ionization chamber RSS-112 at the sampled sites revealed an average outdoor absorbed dose rate of 59.0 nGy.h{sup -1} due to cosmic rays and terrestrial gamma radiation. Computed dose rates obtained through the UNSCEAR(1993) dose coefficients range from 4-182 nGy.h{sup -1}, with a mean value of 27.8 nGy.h{sup -1}, due to natural terrestrial gamma radiation. Ratio of Indoor to Outdoor absorbed dose rates in air was 1.75. The average value of absorbed dose rate in air for the ionizing component of cosmic rays was 31.8 nGy.h{sup -1} at sea level. Because of the 95% of the Camaguey population lives at altitudes close to sea level (10-100 m), the absorbed dose rate in outdoor air from ionizing component of cosmic rays was estimated to be 32.3 nGy.h{sup -1}. An annual average effective dose equivalent of 510 {mu}Sv was estimated for Camaguey population due to the ionizing component of cosmic and gamma terrestrial radiation. This value is lower than the 760 {mu}Sv.year{sup -1} estimated as a world average by UNSCEAR (1993). (author)

  18. Dynamics of complete and incomplete fusion of {sup 6,7}Li, {sup 15}N and {sup 16}O with a {sup 209}Bi target

    Energy Technology Data Exchange (ETDEWEB)

    Gautam, Manjeet Singh; Vinod, K. [Indus Degree College, Department of Physics, Kinana, Jind, Haryana (India); Khatri, Hitender [Dr. B.R. Ambedekar Institute of Technology, Department of Physics, Port Blair, Andaman and Nicobar (India)

    2017-10-15

    The dynamics of complete and incomplete fusion of {sup 6,7}Li, {sup 15}N and {sup 16}O with a common target ({sup 209}Bi) around the Coulomb barrier are analyzed within the context of the coupled channel formulation and the energy dependent Woods-Saxon potential (EDWSP) model. The calculated results are compared with experimental fusion cross-sections and it has been shown that complete fusion (CF) data of weakly bound projectile with a heavy target ({sup 209}Bi) gets suppressed at above barrier energies. In the case of the {sup 6}Li + {sup 209}Bi ({sup 7}Li + {sup 209}Bi) reaction, the CF data at above barrier energies is reduced by 34% (26%) with reference to the expectations of the coupled channel approach. However, the theoretical estimations due to the EDWSP model can minimize the suppression factor by 9% with respect to the reported value and consequently the portion of above barrier CF cross-section data of {sup 6}Li + {sup 209}Bi ({sup 7}Li + {sup 209}Bi) reaction is suppressed by 25% (17%) when compared with the present model calculations. This fusion inhibition can be correlated with the low breakup threshold of projectile which in turn breaks up into two fragments in the entrance channel prior to fusion barrier. The total fusion (TF) data, which is sum of complete fusion (CF) data and incomplete fusion (ICF) data, is not suppressed when compared with the predictions of the theoretical approaches and thus breakup channel has very little influence on the total fusion cross-sections. Although the breakup fragments appeared in both reactions, the enhanced suppression effects observed for the lighter projectile can be correlated with its low binding energy associated with the α-breakup channel. Further the outcomes of the EDWSP model reasonably explained the ICF contribution appeared in the fusion of {sup 6,7}Li + {sup 209}Bi reactions. In contrast to this, the observed fusion dynamics of {sup 15}N + {sup 209}Bi and {sup 16}O + {sup 209}Bi reactions, wherein

  19. Study of the {sup 6}Li + p → {sup 3}He + {sup 4}He reaction in inverse kinematics

    Energy Technology Data Exchange (ETDEWEB)

    Betsou, C.; Pakou, A.; Aslanoglou, X.; Nicolis, N.G.; Sgouros, O.; Soukeras, V. [The University of Ioannina, Department of Physics and HINP, Ioannina (Greece); Cappuzzello, F. [Laboratori Nazionali del Sud, INFN, Catania (Italy); Universita di Catania, Dipartimento di Fisica e Astronomia, Catania (Italy); Acosta, L. [Universidad Nacional Autonoma de Mexico, Instituto de Fisica, Mexico Distrito Federal (Mexico); INFN, Catania (Italy); Agodi, C.; Carbone, D.; Cavallaro, M.; Di Pietro, A.; Fernandez-Garcia, J.P.; Figuera, P.; Fisichella, M. [Laboratori Nazionali del Sud, INFN, Catania (Italy); Foti, A. [Universita di Catania, Dipartimento di Fisica e Astronomia, Catania (Italy); INFN, Catania (Italy); Keeley, N. [National Centre for Nuclear Research, Otwock (Poland); Marquinez-Duran, G.; Martel, I. [Universidad de Huelva, Departamento de Fisica Aplicada, Huelva (Spain); Mazzocco, M.; Strano, E.; Torresi, D. [Universita di Padova, Departimento di Fisica e Astronomia, Padova (Italy); INFN, Padova (Italy); Pierroutsakou, D. [INFN, Napoli (Italy); Rusek, K. [University of Warsaw, Heavy Ion Laboratory, Warsaw (Poland); Stiliaris, E. [University of Athens, Institute of Accelerating Systems and Applications and Department of Physics, Athens (Greece)

    2015-07-15

    Angular distribution measurements were performed for the {sup 6}Li + p → {sup 3}He + {sup 4}He reaction in inverse kinematics at incident energies of 2.7, 3.3, 4.2 and 4.8 MeV/u. The detection of both recoils ({sup 3}He and {sup 4}He) over the laboratory angle range θ{sub lab} = 16 {sup circle} to 34 {sup circle} allowed the determination of the angular distribution over a wide angular range in the center-of-mass frame (θ{sub c.m.} ∝ 40 {sup circle} to 140 {sup circle}). The results clarify inconsistencies between existing data sets and are consistent with compound nucleus model calculations. (orig.)

  20. Radiochemical analysis of the body of the late Mr. Kuboyama

    Energy Technology Data Exchange (ETDEWEB)

    Kimura, K; Ikedo, N; Kimura, K; Kawanishi, H; Kimura, M

    1956-01-01

    Analyses were carried out of various organs of Mr. Kuboyama 200 days after he had exposed himself to radiation of the atomic bomb explosion on Bikini Atoll, March, 1954. By ion-exchange chromatography, the presence of the following nuclides was indicated: /sup 144/Ce, and /sup 144/Pr in the bone (I) (20 x 10/sup -12/ counts/g. fresh wt.). Liver (II), and Kidneys (III); /sup 95/Zr and /sup 95/Nb in II and III; /sup 106/Rh, /sup 129m/Te, and /sup 129/Te in I, III, and muscles; and /sup 89/Sr, /sup 90/Sr, and /sup 90/Y in I, II, and III. Activities found in these organs were decidedly higher than those found in the control samples obtained from individuals who died of other than the so-called radiation sickness. Radiation dose received by the bones of Mr. Kuboyama was calculated to be approximately 8 r.e.p.

  1. A search for W<sup>±> H → μvb$\\bar{b}$ production at the Tevatron

    Energy Technology Data Exchange (ETDEWEB)

    Anastasoaie, Carmen Miruna [Radboud Univ. Nijmegen (Netherlands)

    2008-02-06

    All known experimental results on fundamental particles and their interactions can be described to great accuracy by a theory called the Standard Model. In the Standard Model of particle physics, the masses of particles are explained through the Higgs mechanism. The Higgs boson is the only Standard Model particle not discovered yet, and its observation or exclusion is an important test of the Standard Model. While the Standard Model predicts that a Higgs boson should exist, it does not exactly predict its mass. Direct searches have excluded a Higgs with mH < 114.4 GeV at 95% confidence level, while indirect measurements indicate that the mass should be less than 144 GeV. This analysis looks for W<sup>±>H → μvμb$\\bar{b}$ in 1 fb<sup>-1sup> of data collected with the D0 detector in p$\\bar{p}$ collisions with √s = 1.96 TeV. The analysis strategy relies on the tracking, calorimetry and muon reconstruction of the D0 experiment. The signature is a muon, missing transverse energy (ET) to account for the neutrino and two b-jets. The Higgs mass is reconstructed using the invariant mass of the two jets. Backgrounds are W<sup>±>b$\\bar{b}$, W<sup>±> c$\\bar{c}$, W<sup>±> + light jets (W<sup>±>jj) (and the corresponding backgrounds with a Z boson), t$\\bar{t}$, single top production, and QCD multijet background.

  2. Measuring techniques for environmental sup 3 H, sup 14 C and sup 222 Rn by liquid scintillation counter

    Energy Technology Data Exchange (ETDEWEB)

    Takata, Shigeru; Saito, Masaaki (Tokyo Metropolitan Isotope Research Center (Japan))

    1991-02-01

    Measuring techniques for environmental {sup 3}H, {sup 14}C and {sup 222}Rn with a liquid scintillation counter have been studied. {sup 3}H in environmental water was enriched by electrolysis and measured with a low background liquid scintillation counter. By this technique, {sup 3}H concentration of ground water, river water, sea water and rain water at Tokyo was founded to be 0.1 {approx} 2.5 Bq/1. {sup 14}C in taurine and ethyl-alcohol was measured directly liquid scintillation counter. By this {sup 14}C measuring, natural products, contain low level {sup 14}C, were distinguished from synthesised products contain no {sup 14}C. {sup 222}Rn in toluene extracted from environmental water or air was measured by scintillation pulse interval analysis method. By this technique, {sup 222}Rn was able to be measured under very low background counting rate, 0.03cpm, and high efficiency. (author).

  3. Dalitz plot analysis of D{sub (s)}{sup ±} → K{sup +}K{sup -}π{sup ±}

    Energy Technology Data Exchange (ETDEWEB)

    Hoenle, Andreas; Greenwald, Daniel; Rauch, Johannes; Levit, Dmytro [TU Muenchen (Germany)

    2016-07-01

    Singly Cabibbo suppressed (SCS) and doubly Cabibbo suppressed (DCS) decays of charm mesons play an important role in studies of charmed hadron dynamics. The naive expectations for the rates of SCS and DCS decays are of the order of tan2θ{sub C} and tan4θ{sub C}, respectively, where θ{sub C} is the Cabibbo mixing angle. Recent studies of such decays suffered from limited statistics and can be updated in the current era of large data sets provided e.g. by the Belle experiment. We present the current status of D{sub (s)}{sup ±} → K{sup +}K{sup -}π{sup ±}. Preliminary results of a boosted decision tree-based event selection and a Dalitz plot analysis will be shown.

  4. Collective effects in {sup 17}F and {sup 19}Ne; Effets collectifs dans {sup 17}F et {sup 19}Ne

    Energy Technology Data Exchange (ETDEWEB)

    Lehmann, P; Leveque, A; Grjebine, T; Barloutaud, R [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1959-07-01

    The quadrupolar transition periods {sup 17}F1/2+ {yields} 5/2+ and {sup 19}Ne5/2+ {yields} 1/2+ have been measured, and are compatible with the model of a weak coupling between core and external nucleons. (author) [French] Les periodes des transitions quadrupolaires {sup 17}F1/2+ {yields} 5/2+ et {sup 19}Ne5/2+ {yields} 1/2+ ont ete mesurees et sont compatibles avec le modele d'un couplage faible entre coeur et nucleons exterieures. (auteur)

  5. The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c

    CERN Document Server

    Holmgren, S O; Barreiro, F; Hemingway, R J; Kittel, E W; Kluyver, J C; Losty, Michael J; Massaro, G G G; Van de Walle, R T; Worden, R P; Zatz, J

    1977-01-01

    The total and differential cross sections are presented. Amplitude analyses are performed and the complete sigma /sup +or-/(1385) helicity spin density matrices are extracted. The results are compared with the predictions of the additive quark model and exchange degeneracy. A substantial cross section is observed for the reaction K /sup -/p to pi /sup +/ Sigma /sup -/(1385) in the forward direction, which implies exotic meson quantum numbers in the t-channel. One possible interpretation of this process provides an explanation for the small but significant violations of the additive quark model predictions observed in the reaction K/sup -/p to pi /sup -/ Sigma /sup +/(1385) at low four-momentum transfer. In the backward direction unnatural parity exchange is shown to give a larger contribution to K /sup -/p to Sigma /sup -/(1385) pi /sup +/ than natural parity exchange. (25 refs).

  6. Near infrared and upconversion luminescence behaviour of Er{sup 3+}/Yb{sup 3+} codoped boro-tellurite glasses

    Energy Technology Data Exchange (ETDEWEB)

    Maheshvaran, K. [Department of Physics, Gandhigram Rural Institute - Deemed University, Gandhigram - 624302, India and Department of Physics, K.S. Rangasamy College of Technology, Trichengode - 637215 (India); Arunkumar, S., E-mail: mari-ram2000@yahoo.com; Vijayakumar, R., E-mail: mari-ram2000@yahoo.com; Marimuthu, K., E-mail: mari-ram2000@yahoo.com [Department of Physics, Gandhigram Rural Institute − Deemed University, Gandhigram - 624302 (India)

    2014-04-24

    The broadband NIR and upconversion luminescence behavior in a new series of Er{sup 3+}/Yb{sup 3+} codoped TeO{sub 2}-B{sub 2}O{sub 3}-SrO-BaO-Li{sub 2}O-LiF glasses have been studied exciting at a wavelength of 980 nm using semiconductor laser. A broadband emission is observed from 1450 to 1650 nm with a full width at half maximum (FWHM) around 165 nm in 0.5wt% Yb{sup 3+} ion content E0.5YLTB glass. The radiative parameters such as transition probability (A), stimulated emission cross-section (σ{sup E}), experimental and calculated branching ratios (β{sub R}), optical gain width (σ{sub p}×FWHM) and radiative lifetime (τ{sub cal}) have been calculated for the {sup 4}I{sub 13/2}→{sup 4}I{sub 15/2} NIR emission. Upconversion luminescence spectra of the prepared glasses have been studied and the ESA and ET processes have also been discussed and reported.

  7. ε{sup ′}/ε in 331 models

    Energy Technology Data Exchange (ETDEWEB)

    Buras, Andrzej J. [TUM Institute for Advanced Study, Lichtenbergstr. 2a, D-85747 Garching (Germany); Physik Department, Technische Universität München,James-Franck-Straße, D-85747 Garching (Germany); Fazio, Fulvia De [Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Via Orabona 4, I-70126 Bari (Italy)

    2016-03-02

    Motivated by the recent findings that the ratio ε{sup ′}/ε in the Standard Model (SM) appears to be significantly below the data we investigate whether the necessary enhancement of ε{sup ′}/ε can be obtained in 331 models, based on the gauge group SU(3){sub C}×SU(3){sub L}×U(1){sub X}. In these models new physics (NP) contributions to ε{sup ′}/ε and other flavour observables are dominated by tree-level exchanges of a Z{sup ′} with non-negligible contributions from tree-level Z exchanges generated through the Z−Z{sup ′} mixing. NP contributions to ε{sup ′}/ε in these models are governed by the electroweak penguin operator Q{sub 8} for which the hadronic matrix element is already rather well known so that our analysis of NP contributions is subject to much smaller theoretical uncertainties than within the SM. In particular strong cancelations between different contributions do not take place. The size of NP effects depends not only on M{sub Z{sup ′}} but in particular on a parameter β, which distinguishes between various 331 models. Also a parameter tan β̄ present in the Z−Z{sup ′} mixing plays a role. We perform the analysis in seven 331 models characterized by different β, tan β̄ and fermion representations under the gauge group that have been selected in our earlier analysis on the basis of electroweak precision data. Imposing the constraints from ΔF=2 transitions we find that only three of these models can provide a significant positive shift in ε{sup ′}/ε up to 6×10{sup −4} for M{sub Z{sup ′}}=3 TeV. Two of them allow simultaneously a supression of the rate for B{sub s}→μ{sup +}μ{sup −} by 20% thereby bringing the theory closer to the data without any significant impact on the Wilson coefficient C{sub 9}. The third model provides simultaneous shift ΔC{sub 9}=−0.6, softening the anomalies in B→K{sup ∗}μ{sup +}μ{sup −}, without any significant impact on B{sub s}→μ{sup +}μ{sup −}. NP effects

  8. Observation and empirical shell-model study of new yrast excited states in the nucleus sup 1 sup 4 sup 2 Ce

    CERN Document Server

    Liu Zhong; Guo Ying Xiang; Zhou Xiao Hong; Lei Xiang Guo; LiuMinLiang; Luo Wan Ju; He Jian Jun; Zheng Yong; Pan Qiang Yan; Gan Zai Guo; Luo Yi Xiao; Hayakawa, T; Oshima, M; Toh, Y; Shizima, T; Hatsukawa, Y; Osa, A; Ishii, T; Sugawara, M

    2002-01-01

    Excited states of sup 1 sup 4 sup 2 Ce, populated in deep inelastic reactions of sup 8 sup 2 Se projectiles bombarding sup 1 sup 3 sup 9 La target, have been studied to medium spins using in-beam gamma spectroscopy techniques. Three new levels have been identified at 2625, 2995 and 3834 keV, and assigned as 8 sup + , 9 sup ( sup - sup ) and 11 sup ( sup - sup ) , respectively, based on the analysis of the properties of gamma transitions. These new yrast states follow well the level systematics of N 84 isotones. Their structures have been discussed with the help of empirical shell-model calculations

  9. Inventory of {sup 226}Ra, {sup 228}Ra and {sup 210}Pb in marine sediments cores of Southwest Atlantic Ocean

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Alice M.R.; Oliveira, Joselene de, E-mail: alice.costa@usp.br, E-mail: jolivei@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Gerencia de Metrologia das Radiacoes. Lab. de Radiometria Ambiental; Figueira, Rubens C.L.; Mahiques, Michel M.; Sousa, Silvia H.M., E-mail: rfigueira@usp.br, E-mail: mahiques@usp.br, E-mail: smsousa@usp.br [Universidade de Sao Paulo (USP), Sao Paulo, SP (Brazil). Instituto Oceanografico

    2015-07-01

    {sup 210}Pb (22.3 y) is a radioactive isotope successfully applied as tracer of sediment dating of the last 100-150 years. The application of {sup 226}Ra and {sup 228}Ra as paleoceanographic tracers (half-lives of 1,600 y and 5.7 y, respectively) also gives some information of ocean's role in past climate change. In this work, it was analyzed 2 sediment cores collect at Southwest Atlantic Ocean. The sediments samples were freeze-dried and acid digested in microwave. It was carried out a radiochemical separation of {sup 226}Ra, {sup 228}Ra and {sup 210}Pb and performed a gross alpha and gross beta measurement of both precipitates Ba(Ra)SO{sub 4} and PbCrO{sub 4} in a low background gas-flow proportional counter. Activity concentrations of {sup 226}Ra ranged from 45 Bq kg{sup -1} to 70 Bq kg{sup -1} in NAP-62 and from 57 Bq kg{sup -1} to 82 Bq kg{sup -1} in NAP-63 samples. The concentration of {sup 228}Ra varied between 37 Bq kg{sup -1} and 150 Bq kg{sup -1} in NAP-62 and between 23 Bq kg{sup -1} and 111 Bq kg{sup -1} in NAP-63 samples. The concentration of total {sup 210}Pb ranged from 126 Bq kg{sup -1} to 256 Bq kg{sup -1} in NAP-62 and from 63 Bq kg{sup -1} to 945 Bq kg{sup -1} in NAP-63 samples. Results of {sup 210}Pb{sub uns} varied from 68 Bq kg{sup -1} to 192 Bq kg{sup -1} for NAP-62, while varied from <4.9 Bq kg{sup -1} to 870 Bq kg{sup -1} in NAP-63 profile. Increased values of {sup 210}Pb{sub uns} were found on the top of both NAP-62 and NAP- 63 sediment profile. (author)

  10. Determination of molecular stopping cross section of {sup 12}C, {sup 16}O, {sup 28}Si, {sup 35}Cl, {sup 58}Ni, {sup 79}Br, and {sup 127}I in silicon nitride

    Energy Technology Data Exchange (ETDEWEB)

    Barradas, N.P., E-mail: nunoni@ctn.ist.utl.pt [Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Unversidade de Lisboa, Estrada Nacional 10 ao km 139.7, 2695-066 Bobadela LRS (Portugal); Bergmaier, A. [Institut für Angewandte Physik und Messtechnik, Fakultät für Luft und Raumfahrttechnik, Werner-Heisenberg-Weg 39, D-85577 Neubiberg (Germany); Mizohata, K. [Department of Physics, University of Helsinki, P.O. Box 43, FI-00014 University of Helsinki (Finland); Msimanga, M. [iThemba LABS Gauteng, National Research Foundation, Private Bag 11, WITS 2050, Johannesburg (South Africa); Department of Physics, Tshwane University of Technology, Private Bag X680, Pretoria 0001 (South Africa); Räisänen, J. [Department of Physics, University of Helsinki, P.O. Box 43, FI-00014 University of Helsinki (Finland); Sajavaara, T. [Department of Physics, University of Jyväskylä, Survontie 9, 40014 Jyväskylä (Finland); Simon, A. [International Atomic Energy Agency, Division of Physical and Chemical Sciences, Vienna International Centre, P.O. Box 100, A-1400 Vienna (Austria); Institute of Nuclear Research of the Hungarian Academy of Sciences, (ATOMKI), P.O. Box 51, H-4001 Debrecen (Hungary)

    2015-10-01

    Silicon nitride is a technologically important material in a range of applications due to a combination of important properties. Ion beam analysis techniques, and in particular, heavy ion elastic recoil detection analysis can be used to determine the stoichiometry of silicon nitride films, which often deviates from the ideal Si{sub 3}N{sub 4}, as well as the content of impurities such as hydrogen, even in the presence of other materials or in a matrix containing heavier elements. Accurate quantification of IBA results depends on the basic data used in the data analysis. Quantitative depth profiling relies on the knowledge of the stopping power cross sections of the materials studied for the ions involved, which in the case of HI-ERDA is both the primary beam, and the recoiled species. We measured the stopping cross section of {sup 12}C, {sup 16}O, {sup 28}Si, {sup 35}Cl, {sup 58}Ni, {sup 79}Br, and {sup 127}I in a well-characterised silicon nitride membrane. The measurements were made by independent groups utilising different experimental setups and methods. In some cases there is extensive overlap of the energy range in different experiments, allowing a comparison of the different results. The four independent data sets reported in this work are in excellent agreement with each other, in the cases where similar energy ranges were measured. On the other hand, the data are in most cases higher than calculations made with the interpolative schemes SRIM and MSTAR together with the Bragg rule. Better agreement is found with MSTAR in some of the cases studied. This work is a significant extension of the heavy ion stopping power data base for silicon nitride.

  11. Complexation of Bi{sup 3+}, Ac{sup 3+}, Y{sup 3+}, Lu{sup 3+}, La{sup 3+} and Eu{sup 3+} with benzo-diaza-crown ether with carboxylic pendant arms

    Energy Technology Data Exchange (ETDEWEB)

    Egorova, Bayirta V. [Lomonosov Moscow State Univ., Moscow (Russian Federation). Chemistry Dept.; Oshchepkov, Maxim S.; Fedorova, Olga A. [Mendeleev University of Chemistry and Technology of Russia, Moscow (Russian Federation); Russian Academy of Sciences, Moscow (Russian Federation). A.N. Nesmeyanov Institute of Organoelement Compounds; Fedorov, Yury V. [Lomonosov Moscow State Univ., Moscow (Russian Federation). Chemistry Dept.; Russian Academy of Sciences, Moscow (Russian Federation). A.N. Nesmeyanov Institute of Organoelement Compounds; Budylin, Gleb S.; Shirshin, Evgeny A. [Lomonosov Moscow State Univ., Moscow (Russian Federation). Dept. of Physics; Kalmykov, Stepan N. [Lomonosov Moscow State Univ., Moscow (Russian Federation). Chemistry Dept.; National Research Center ' Kurchatov Institute' , Moscow (Russian Federation)

    2016-11-01

    Polyaminopolycarboxylates are attractive ligands for binding cationic radionuclides for synthesis of radiopharmaceuticals with target delivery to tumor cells. Nowadays beta emitting Y-90 and Lu-177 are used as therapeutic agents, while Ac-225 and Bi-213 are considered as perspective for alpha therapy. In the present study new data on complexation of Y{sup 3+}, Lu{sup 3+}, Ac{sup 3+} and Bi{sup 3+} with 2,2'-(15-formyl-2,3,5,6,8,9,11,12-octahydrobenzo [b][1,4,10,7,13]trioxadiazacyclopentadecine-4,10- diyl)diacetic acid are presented. For ligand and complexes characterization potentiometric titration, solvent extraction, chromatography and solubility techniques were applied. The highest values of stability constants within the range of log K = 5.8 - 7.5 were found for Ac{sup 3+} and REE. Fast complex formation is established which is beneficial for practical applications in radiopharmaceutical synthesis.

  12. A mixed-valent uranium phosphonate framework containing U{sup IV}, U{sup V}, and U{sup VI}

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Lanhua; Zheng, Tao; Wang, Yaxing; Diwu, Juan; Chai, Zhifang; Wang, Shuao [School for Radiological and interdisciplinary Sciences (RAD-X), Soochow University, Suzhou (China); Collaborative Innovation Center of Radiation Medicine, Jiangsu Higher Education Institutions, Suzhou (China); Bao, Songsong; Zheng, Limin [State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University (China); Zhang, Linjuan; Wang, Jianqiang [Shanghai Institute of Applied Physics and, Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Chinese Academy of Sciences, Shanghai (China); Liu, Hsin-Kuan [Department of Chemistry, National Central University, Jhongli (China); Albrecht-Schmitt, Thomas E. [Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL (United States)

    2016-08-16

    It is shown that U{sup V}O{sub 2}{sup +} ions can reside at U{sup VI}O{sub 2}{sup 2+} lattice sites during mild reduction and crystallization process under solvothermal conditions, yielding a complicated and rare mixed-valent uranium phosphonate compound that simultaneously contains U{sup IV}, U{sup V}, and U{sup VI}. The presence of uranium with three oxidation states was confirmed by various characterization techniques, including X-ray crystallography, X-ray photoelectron, electron paramagnetic resonance, FTIR, UV/Vis-NIR absorption, and synchrotron radiation X-ray absorption spectroscopy, and magnetism measurements. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  13. Polarized and unpolarized lepton pair forward-backward asymmetries in B → K{sub 0}{sup *}(1430)l{sup +}l{sup -} and B → Kl{sup +}l{sup -} decays in two-Higgs-doublet model

    Energy Technology Data Exchange (ETDEWEB)

    Falahati, F.; Abbasi, H. [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of)

    2016-08-15

    In this paper we shall focus on the effects of concrete models such as the SM and 2HDM of type III on the polarized and unpolarized forward.backward asymmetries of B → K{sub 0}{sup *}(1430)l{sup +}l{sup -} and B → Kl{sup +}l{sup -} decays. The obtained results of these decay modes are compared to each other. Also, we obtain the minimum required number of events for detecting each asymmetry and compare it with the number of produced B anti B pairs at the LHC or supposed to be produced at the Super-LHC. At the end, we conclude that the study of these asymmetries for B → K{sub 0}{sup *}(1430)l{sup +}l{sup -} and B → Kl{sup +}l{sup -} processes are very effective tools for establishing new physics in the future B-physics experiments. (orig.)

  14. Lethal Effect on Bacterium of Decay of Incorporated Radioactive Atoms ({sup 3}H, {sup 14}C, {sup 32}P); Effet Letal de la Desintegration d'Atomes Radioactifs ({sup 3}H, {sup 14}C, {sup 32}P) Incorpores dans une Bacterie

    Energy Technology Data Exchange (ETDEWEB)

    Apelgot, Sonia [Laboratoire Curie, Institut du Radium, Paris (France)

    1968-06-15

    The biological effect of decay of {sup 3}H, {sup 14}C and {sup 32}P incorporated into a bacterium depends on the nature of the organic molecule labelled, on the position of the isotope within it and on the isotope itself. In sum, results obtained to date show that: The decay of {sup 3}H atoms incorporated into certain macromolecules of a bacterium causes sterilization through ionization by the ss{sup -} particle emitted; transmutation is of negligible importance. This self-irradiation is comparable in effect with X-rays and is affected in a similar manner by the same factors: temperature, presence of a radioprotector, radiosensitivity of the strain. Decay of {sup 14}C or {sup 32}P atoms incorporated into bacterial DNA is lethal because of the transmutation effect; ionizations produced by emitted ss{sup -} particles may be disregarded. Survival curves for {sup 32}P transmutations depend on the experimental conditions. Some of the results obtained with {sup 32}P are similar to those obtained with X-rays, e.g. effects of temperature, radical capture and oxygen, while others are similar to those of u.v. light, e.g., effect of growth conditions. Comparative tests made with {sup 32}P indicate that the recoil energy of transmutation is not the phenomenon responsible for the lethal effect observed. Comparison of the results obtained after X-irradiation or decay of {sup 3}H or {sup 32}P incorporated into the DNA of bacteria of the same strain of E. coli shows that the efficiency of a {sup 32}P transmutation is about four times greater than that of an ionization produced at random within the same DNA. (author) [French] L'effet biologique de la desintegration de {sup 3}H, {sup 14}C et {sup 32}P incorpores dans une bacterie depend de la nature de la molecule organique marquee, de l'emplacement de l'isotope sur celle-ci et de la nature de l'isotope lui-meme. L'ensemble des resultats obtenus a ce jour montre que la desintegration des atomes de {sup 3}H incorpores dans certaines

  15. Stimulation of ( sup 3 H)ouabain binding to rat synaptosomal (Na sup + + K sup + )-ATPase by aluminum

    Energy Technology Data Exchange (ETDEWEB)

    Caspers, M.L.; Dow, M.J.; Kwaiser, T.M. (Univ. of Detroit, MI (United States))

    1991-03-11

    The objective of this study was to investigate the effect of aluminum on the (Na{sup +} + K{sup +})-ATPase. Synaptosomes were prepared from the cerebral cortices of adult, male Sprague-Dawley rats. The stimulation of ({sup 3}H)ouabain binding to the high affinity isoform of the (Na{sup +} + K{sup +})-ATPase produced by AlCl{sub 3} developed slowly, with a maximum effect observed after a 40 min preincubation. AlCl{sub 3} produced a 26.5% stimulation in ({sup 3}H)ouabain binding to the synaptosomal (Na{sup +} + K{sup +})-ATPase and this stimulation increased to 33.3% at 100 {mu}M. Scatchard analysis of ({sup 3}H)ouabain binding data in the presence of 100 {mu}M AlCl{sub 3} yielded a B{sub max} of 79.4 {plus minus} 3.5 pmol/mg protein, significantly elevated from the B{sub max} value obtained in the absence of aluminum. The K{sub D}values were similar in the presence or absence of aluminum. In summary, aluminum affects the functioning of the synaptosomal (Na{sup +} + K{sup +})-ATPase. This may contribute, at least in part, to the disruption of neuronal function associated with disorders where elevated aluminum content in the CNS is noted.

  16. Measurement of Single Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering Reaction n<sup>↑>(e, e'π<sup>+>) X at Jefferson Lab

    Energy Technology Data Exchange (ETDEWEB)

    Allada, Kalyan [Univ. of Kentucky, Lexington, KY (United States)

    2010-06-01

    What constitutes the spin of the nucleon? The answer to this question is still not completely understood. Although we know the longitudinal quark spin content very well, the data on the transverse quark spin content of the nucleon is still very sparse. Semi-inclusive Deep Inelastic Scattering (SIDIS) using transversely polarized targets provide crucial information on this aspect. The data that is currently available was taken with proton and deuteron targets. The E06-010 experiment was performed at Jefferson Lab in Hall-A to measure the single spin asymmetries in the SIDIS reaction n<sup>↑>(e, e'π<sup>±/K±>)X using transversely polarized <sup>3sup>He target. The experiment used the continuous electron beam provided by the CEBAF accelerator with a beam energy of 5.9 GeV. Hadrons were detected in a high-resolution spectrometer in coincidence with the scattered electrons detected by the BigBite spectrometer. The kinematic coverage focuses on the valence quark region, x = 0.19 to 0.34, at Q<sup>2sup> = 1.77 to 2.73 (GeV/c)<sup>2sup>. This is the first measurement on a neutron target. The data from this experiment, when combined with the world data on the proton and the deuteron, will provide constraints on the transversity and Sivers distribution functions on both the u and d-quarks in the valence region. In this work we report on the single spin asymmetries in the SIDIS n<sup>↑>(e, e'π<sup>+>)X reaction.

  17. Study of the unbound systems {sup 16}B and {sup 13}Be; Etude des systemes non lies {sup 16}B et {sup 13}Be

    Energy Technology Data Exchange (ETDEWEB)

    Lecouey, J.L

    2002-12-01

    A description of a study of the neutron-rich unbound systems {sup 16}B and {sup 13}Be is presented. The structure of these nuclei provides strong constraints on current models and vital information for a three-body description of the Borromean two-neutron halo nuclei {sup 17}B and {sup 14}Be. The experimental work was undertaken at GANIL. Single-proton removal reactions were employed to populate the nuclei of interest, starting with a secondary beam of {sup 17}C at 35 MeV/nucleon (for {sup 16}B) and {sup 14}B at 41 MeV/nucleon (for {sup 13}Be). The charged fragments were detected using a position-sensitive Si-Si-CsI telescope of the CHARISSA collaboration, and the neutron using the DEMON modular array. The decay energy spectra for {sup 16}B and {sup 13}Be were thus reconstructed from the measured {sup 15}B-n and {sup 12}Be-n coincidences. A theoretical description, based on the sudden approximation, of the population of unbound final states was developed. The predicted decay energy spectra were compared with the measurements after folding in the response of the experimental setup. This involved the use of simulations based on GEANT and a code, BELZEBUTH, developed specifically for the present work. In the case of {sup 15}B+n the data were best reproduced assuming the population of a narrow ({gamma} {<=} 100 keV), low-lying (E{sub r} = 85 keV) d-wave resonance(s). The {sup 12}Be+n data were consistent with the population of a very broad ({gamma} {approx_equal} 1-2 MeV) s-wave state at around 600-800 keV and a d-wave resonance at 2.5 MeV ({gamma} {approx} 400 keV). (author)

  18. Simultaneous measurement of angular distribution of elastic scattering for {sup 6}Li, {sup 7}Be, and {sup 8}B in {sup 58}Ni; Medida simultanea de Distribuciones Angulares de Dispersion Elastica para {sup 6}Li, {sup 7}Be, y {sup 8}B en {sup 58}Ni

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz S, A. [Facultad de Ciencias, UAEM, Toluca, Estado de Mexico (Mexico); Martinez Q, E.; Aguilera R, E.F.; Murillo O, G.; Lizcano C, D.; Gomez C, A. [Departamento de Aceleradores, ININ, 52750 La Marquesa, Estado de Mexico (Mexico)

    2007-07-01

    The experimental angular distributions of elastic scattering for the projectiles {sup 6}Li, {sup 7}Be, {sup 8}B in {sup 58}Ni were obtained. Using the Optical model with a Woods-Saxon potential form, as much for the real part as for the imaginary one, an adjustment to the experimental data varying only the depth of the imaginary part of the potential is made. A comparison of the results obtained for each projectile is made. (Author)

  19. Highly efficient red upconversion fluorescence emission in Yb{sup 3+}/Ho{sup 3+}/Ce{sup 3+} codoped LaF{sub 3} nanocrystals

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Wei, E-mail: gaowei@xupt.edu.cn; Dong, Jun; Liu, Jihong; Yan, Xuewen

    2016-11-15

    The Yb{sup 3+}/Ho{sup 3+}/Ce{sup 3+} codoped LaF{sub 3} nanocrystals have been successfully prepared via a facile hydrothermal method. The significant enhancement in the red upconversion emission of Ho{sup 3+} is successfully obtained in LaF{sub 3}:Yb{sup 3+}/Ho{sup 3+} nanocrystals through introducing of Ce{sup 3+} under NIR excitation at 980 nm. The red-to-green emission ratio of Ho{sup 3+} is enhanced 18.9-fold with Ce{sup 3+} concentration increasing to 12%, which is due to the two efficient cross relaxation processes of {sup 5}I{sub 6} (Ho{sup 3+})+{sup 2}F{sub 5/2} (Ce{sup 3+})→{sup 5}I{sub 7} (Ho{sup 3+})+{sup 2}F{sub 7/2} (Ce{sup 3+}) and {sup 5}S{sub 2}/{sup 5}F{sub 4} (Ho{sup 3+})+{sup 2}F{sub 5/2} (Ce{sup 3+})→{sup 5}F{sub 5} (Ho{sup 3+})+{sup 2}F{sub 7/2} (Ce{sup 3+}) between Ho{sup 3+} and Ce{sup 3+} ions. The enhancement mechanism of red emission and conversion efficiency between Ho{sup 3+} and Ce{sup 3+} are investigated in detail.

  20. Na sup + pump in renal tubular cells is regulated by endogenous Na sup + -K sup + -ATPase inhibitor from hypothalamus

    Energy Technology Data Exchange (ETDEWEB)

    Cantiello, H.F.; Chen, E.; Ray, S.; Haupert, G.T. Jr. (Harvard medical School, Boston, MA (USA))

    1988-10-01

    Bovine hypothalamus contains a high affinity, specific, reversible inhibitor of mammalian Na{sup +}-K{sup +}-ATPase. Kinetic analysis using isolated membrane fractions showed binding and dissociation rates of the hypothalamic factor (HF) to be (like ouabain) relatively long (off rate = 60 min). To determine whether the kinetics of inhibition in intact cells might be more consistent with regulation of physiological processes in vivo, binding and dissociation reactions of HF in intact renal epithelial cells (LLC-PK{sup 1}) were studied using {sup 86}Rb{sup +} uptake and ({sup 3}H)ouabain binding. As with membranes, a 60-min incubation with HF inhibited Na{sup +}-K{sup +}-ATPase in LLC-PK{sub 1} cells. In contrast to membrane studies, no prolonged incubation with LLC-PK{sub 1} was needed to observe inhibition of Na{sup +}-K{sup +}-ATPase. HF caused a 33% inhibition of ouabain-sensitive {sup 86}Rb{sup +} influx within 10 min. Incubation of cells with HF followed by washout showed rapid reversal of pump inhibition and a doubling of pump activity. The dose-response curve for HF inhibition of LLC-PK{sub 1} {sup 86}Rb{sup +} uptake showed a sigmoidal shape consistent with an allosteric binding reaction. Thus HF is a potent regulator of Na{sup +}-K{sup +}-ATPase activity in intact renal cells, with binding and dissociation reactions consistent with relevant physiological processes.

  1. Measurement of the Branching Fractions for B+ --> K*{sup 0}pi{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.

    2004-02-10

    We present a preliminary result of the branching fraction for the B meson decay to the final state K{sup +}{pi}{sup -}{pi}{sup +} via an intermediate K*{sup 0} resonance using the sample of approximately 23 million B{bar B} mesons produced at the {Upsilon}(4S) resonance with the BABAR detector at the PEP II e{sup +}e{sup -} collider. The K*{sup 0} was detected through the decay to the final state K{sup +}{pi}{sup -}. The result of this analysis is {Beta}(B{sup +} {yields} K*{sup 0}{pi}{sup +}) = (15.5 {+-} 3.4 {+-} 1.8) x 10{sup -6} where the first error is statistical and the second is systematic.

  2. Absolute E3 and M2 transition probabilities for the electromagnetic decay of the I{sup {pi}}=K{sup {pi}}=8{sup -} isomeric state in {sup 132}Ce

    Energy Technology Data Exchange (ETDEWEB)

    Perkowski, J.; Andrzejewski, J.; Krol, A. [University of Lodz, Faculty of Physics and Applied Informatics, Lodz (Poland); Srebrny, J.; Kownacki, J.; Zielinska, M. [University of Warsaw, Heavy Ion Laboratory, Warsaw (Poland); Bruce, A.M. [University of Brighton, School of Environment and Technology, Brighton (United Kingdom); Droste, C.; Grodner, E.; Morek, T. [University of Warsaw, Nuclear Physics Division, IEP, Warsaw (Poland); Kisielinski, M. [University of Warsaw, Heavy Ion Laboratory, Warsaw (Poland); The Andrzej Soltan Institute for Nuclear Studies, Warsaw (Poland); Korman, A. [The Andrzej Soltan Institute for Nuclear Studies, Warsaw (Poland); Kowalczyk, M.; Mierzejewski, J. [University of Warsaw, Heavy Ion Laboratory, Warsaw (Poland); University of Warsaw, Nuclear Physics Division, IEP, Warsaw (Poland); Marganiec, J. [University of Lodz, Faculty of Physics and Applied Informatics, Lodz (Poland); Gesellschaft fuer Schwerionenforschung (GSI), Reactions and Nuclear Astrophysics Division, Darmstadt (Germany); Sobczak, K. [University of Lodz, Faculty of Physics and Applied Informatics, Lodz (Poland); Institute of Physics Polish Academy of Sciences, Warsaw (Poland); Trzaska, W.H. [University of Jyvaeskylae, Department of Physics, Survontie 9, P.O. Box 35, Jyvaeskylae (Finland); Helsinki Institute of Physics, Survontie 9, P.O. Box 35, Helsinki (Finland)

    2009-12-15

    The decay of the I{sup {pi}}=K{sup {pi}}=8{sup -} isomeric state at 2340keV in {sup 132}Ce has been investigated in the {sup 120}Sn({sup 16}O,4n){sup 132}Ce reaction. The measurements were carried out in e-{gamma} and {gamma}-{gamma} coincidence modes using an electron spectrometer coupled to the OSIRIS II gamma-ray array at the Heavy Ion Laboratory of the University of Warsaw. Experimentally obtained internal conversion coefficients for the 8{sup -}{yields}6{sup +} and 8{sup -}{yields}5{sup +} transitions allowed the multipolarities, mixing ratios, reduced transition probabilities and hindrance factors to be determined. (orig.)

  3. Precise measurement of the sup 2 sup 7 Al(n,2n) sup 2 sup 6 sup g Al excitation function near threshold and its relevance for fusion-plasma technology

    CERN Document Server

    Wallner, A; Priller, A; Steier, P; Vonach, H; Chuvaev, S V; Filatenkov, A A; Ikeda, Y; Mertens, G; Rochow, W

    2003-01-01

    A new accurate measurement of the sup 2 sup 7 Al(n,2n) sup 2 sup 6 Al excitation function leading to the ground state of sup 2 sup 6 Al(t sub 1 sub / sub 2 =7.1 x 10 sup 5 years) in the near-threshold region (E sub t sub h =13.55 MeV) was performed, with the goal to achieve relative cross-sections with the highest accuracy possible using proven methods. In addition, the measurements were also designed to provide good absolute cross-section values, since absolute cross-sections are important for radioactive waste predictions in future fusion reactor materials. Samples of Al metal were irradiated with neutrons in the energy range near threshold (E sub n =13.5-14.8 MeV) in Vienna and St. Petersburg, and at 14.8 MeV in Tokai-mura. In addition, irradiations with neutrons of higher energies (17 and 19 MeV) were performed in Tuebingen, to obtain also cross-section values well above threshold. The amount of sup 2 sup 6 Al produced during the irradiations was measured via accelerator mass spectrometry (AMS). With this...

  4. Analysis of the differential cross sections for the reaction pp{yields}ppK{sup +}K{sup -} in view of the K{sup +}K{sup -} interaction

    Energy Technology Data Exchange (ETDEWEB)

    Silarski, M.

    2008-07-15

    Measurements of the pp{yields}ppK{sup +}K{sup -} reaction, performed with the experiment COSY-11 at the Cooler Synchrotron COSY, show a significant difference between the obtained excitation function and theoretical expectations including pp-FSI. The discrepancy may be assigned to the influence of K{sup +}K{sup -} or K{sup -}p interaction. This interaction should manifest itself in the distributions of the differential cross section. This thesis presents an analysis of event distributions as a function of the invariant masses of two particle subsystems. In particular in the analysis two generalizations of the Dalitz plot proposed by Goldhaber and Nyborg are used. The present Investigations are based on the experimental data determined by the COSY-11 collaboration from two measurements at excess energies of Q=10 MeV and 28 MeV. The experimental distributions are compared to results of Monte Carlo simulations generated with various parameters of the K{sup +}K{sup -} and K{sup -}p interaction. The values of the K{sup +}K{sup -} scattering length, extracted from two data sets for Q=10 MeV and 28 MeV amount to: a{sub K{sup +}}{sub K{sup -}}=(11{+-}8)+i(0{+-}6) fm for Q=10 MeV, and a{sub K{sup +}}{sub K{sup -}}=(0.2{+-}0.2)+i(0.0{+-}0.5) fm for Q=28 MeV. Due to the low statistics, the extracted values have large uncertainties and are consistent with very low values of the real and imaginary part of the scattering length. (orig.)

  5. Study of different absorbent materials for the preparation of generator systems of {sup 99}Mo - {sup 99m}Tc and {sup 188}W-{sup 188}Re

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Paula Regina Corain; Osso Junior, Joao Alberto, E-mail: paulinhacorain@usp.b, E-mail: jaosso@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2009-07-01

    Amongst some currently radioisotopes, {sup 99m}Tc and {sup 188}Re present adequate decay properties for use in Nuclear Medicine. In the current times the most diagnosis examinations are performed with {sup 99m}Tc and {sup 188}Re is one radioisotope of potential use in therapy techniques. The objective of this work consists of determining the capacity of some adsorbent materials for retention of molybdenum and tungsten, aiming the optimization of generator systems of {sup 99}Mo-{sup 99m}Tc and {sup 188}W-{sup 188}Re with suitable characteristics for application in Nuclear Medicine. Known amounts, in mass, of molybdenum and tungsten were percolated through different chromatographic columns containing different commercial adsorbent materials such as: PZC (poly-zirconium compound), acid alumina and calcinated alumina used in the routine preparation of {sup 99}Mo-{sup 99m}Tc generators at IPEN. The tungsten ({sup 188}W), as well the PZC used in this project, supplied by Russia and Japan, respectively, through the International Atomic Energy Agency (IAEA) and used without any previous preparation. Also trace amounts of {sup 99}Mo and {sup 188}W were added to the initial solutions and the generators were assembled. The {sup 99}Mo-{sup 99m}Tc generators were then eluted with known volumes of 0.9% NaCl solution every 24 hours whereas the {sup 188}W-{sup 188}Re generators were eluted every 48 hours. The eluted samples were analyzed by Gamma Spectroscopy and later submitted to quality control evaluation. The results showed that the PZC presents superior retention capacity for Mo of 97.50mg Mo/gPZC, higher than in acid and calcinated alumina, however the elution efficiency at lower pHs is not so high. With regards to the experiments carried out with {sup 188}W and alumina, it was verified that the elution efficiency of {sup 188}Re was not reproducible and the retention capacity of W was 90.23mgW/gAl{sub 2}O{sub 3} at pH 7. (author)

  6. Search for 1/sup +/ states in /sup 208/Pb by /sup 208/Pb(p, p') and the /sup 209/Bi(d, /sup 3/He) reactions

    Energy Technology Data Exchange (ETDEWEB)

    Ikegami, H.; Yamazaki, T.; Morinobu, S.; Katayama, I.; Fujiwara, M. [Osaka Univ., Suita (Japan). Research Center for Nuclear Physics; Ikegami, Hidetsugu; Muraoka, Mitsuo [eds.; Osaka Univ., Suita (Japan). Research Center for Nuclear Physics

    1980-01-01

    Proton inelastic scattering experiment on Pb-208 was carried out by using 65 MeV protons from a 230 cm AVF cyclotron, to study the 1/sup +/ states in Pb-208. The momentum of outgoing protons was analyzed by the magnetic spectrograph RAIDEN. The 7.06 MeV state was very weakly excited. In order to identify 1/sup +/ states from the angular distributions of the inelastic scattering, the proton spectra scattered from the well known 1/sup +/ state in Pb-206 were measured. because of masking by a strong neighbouring peak, the differential cross section of the 1/sup +/ state was measured only at two points. The comparison between the experiment and distorted wave calculation for the 1/sup +/ state (1.703 MeV) in Pb-206 was made, and the results implied that the 1/sup +/ states in Pb-208 would also be weakly excited even if these states are good particle-hole states, Next, Bi-209 (d, He-3) reaction experiment was performed. The comparison between the preliminary results and the calculated results based on the shell model is shown in a figure. The overall agreement between the experimental and theoretical results seems to be good. However, the existence of the 1/sup +/ state has not been confirmed, and will be confirmed in the next step to be done.

  7. Strangeness production in antiproton annihilation at rest on sup 3 He, sup 4 He and sup 20 Ne

    Energy Technology Data Exchange (ETDEWEB)

    Balestra, F. (Cagliari Univ. (Italy). Dipt. di Scienze Fisiche Istituto Nazionale di Fisica Nucleare, Cagliari (Italy)); Batusov, Yu.A.; Falomkin, I.V.; Pontecorvo, G.B.; Rozhdestvensky, A.M.; Sapozhnikov, M.G.; Tretyak, V.I. (Joint Inst. for Nuclear Research, Dubna (USSR)); Bendiscioli, G.; Filippini, V.; Rotondi, A.; Salvini, P.; Venaglioni, A. (Pavia Univ. (Italy). Dipt. di Fisica Nucleare e Teorica Istituto Nazionale di Fisica Nucleare, Pavia (Italy)); Bossolasco, S.; Bussa, M.P.; Busso, L.; Fava, L.; Ferrero, L.; Panzieri, D.; Piragino, G.; Tosello, F. (Turin Univ. (Italy). Ist. di Fisica Generale Istituto Nazionale di Fisica Nucleare, Turin (Italy)); Breivik, F.O.; Danielsen, K.M.; Jacobsen, T.; Soerensen, S.O. (Oslo Univ. (Norway). Physics Dept.); Guaraldo, C.; Maggiora, A. (Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati); Haatuft, A.; Halsteinslid, A.; Myklebost, K.; Olsen, J.M. (Bergen Univ. (Norway). Dept. of Physics); Lodi Rizzini,

    1991-05-13

    New data are reported on antiproton annihilations at rest with production of {Lambda} and K{sub S}{sup 0}, using a streamer chamber with {sup 3}He, {sup 4}He and {sup 20}Ne as gas targets. The data include {Lambda}, K{sub S}{sup 0}, {Lambda}K{sub S}{sup 0} and K{sub S}{sup 0}K{sub S}{sup 0} production rates and momentum distributions, {pi}{sup -} momentum spectra, mean numbers of charged particles generally and of negatively charged particles separately for different reaction channels. The yields are compared to simple combinatorial calculations based on the extreme assumptions of {Lambda} production via B=1 or via B=0 (anti K rescattering) annihilations. {Lambda} and K{sub S}{sup 0} momentum spectra are compared to simple model calculations where B=0 and B=1 annihilations with and without final-state interactions are considered. A review of existing data on {Lambda} and K{sub S}{sup 0} production is presented, showing the dependence on the anti p momentum and on the mass number of the target. (orig.).

  8. <sup>238sup>PuO2 Fuel and Dosimetry

    Energy Technology Data Exchange (ETDEWEB)

    Mayo, Douglas R. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Rawool-Sullivan, Mohini [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Garner, Scott Edward [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Wenz, Tracy R. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Karpius, Peter Joseph [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-06-01

    <sup>238sup>Pu is an ideal material for use as a heat source with its half-life of 87.7 years and copious particle emissions. <sup>238sup>Pu radioisotope thermoelectric generators (RTGs) have found use for pacemakers, Apollo Space missions, Mars rovers, and Voyager spacecraft. In evaluating the dose to personnel and components near a <sup>238sup>Pu-based RTG, a number of additional nuclides and their daughter products must be considered to get an accurate estimate for γ-dose, and the amount of <sup>17sup>O and <sup>18sup>O for the neutron-dose must be considered. This paper looks at the contributing nuclides and their daughter products that add the most to the dose rates.

  9. Construction the organizational structure of the MTE oriented on the business-processes management

    OpenAIRE

    Kohut, Y.

    2011-01-01

    The methodical recommendations for the construction the organizational structure of the MTE oriented on the business-processes management has been developed by substantiating of basic works, maintenance, sequence and orientation, and also methods and receptions of their realization.

  10. Comparison of {sup 111}In-DOTA-DPhe{sup 1}-Tyr{sup 3}-octreotide and {sup 111}In-DOTA-lanreotide scintigraphy and dosimetry in patients with neuroendocrine tumours

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Margarida; Virgolini, Irene [Lainz Hospital, Institute of Nuclear Medicine, Vienna (Austria); University Clinic for Nuclear Medicine, Innsbruck (Austria); Traub-Weidinger, Tatjana [University Clinic for Nuclear Medicine, Innsbruck (Austria); University Hospital, Department of Nuclear Medicine, Vienna (Austria); Li, Shuren [University Hospital, Department of Nuclear Medicine, Vienna (Austria); Ibi, Bettina [Lainz Hospital, Institute of Physics, Vienna (Austria)

    2006-05-15

    Somatostatin receptor scintigraphy with {sup 111}In-DOTA-DPhe{sup 1}-Tyr{sup 3}-octreotide ({sup 111}In-DOTA-TOC) and {sup 111}In-DOTA-lanreotide ({sup 111}In-DOTA-LAN) has been used for staging of neuroendocrine tumours (NETs). However, the comparative diagnostic value of these radioligands on a lesion basis has not yet been established. The aim of this study was to compare the diagnostic capacity of {sup 111}In-DOTA-TOC and {sup 111}In-DOTA-LAN scintigraphy in patients with NETs, evaluating whether significant differences exist in lesion imaging with these radioligands. Furthermore, dosimetric data were compared. Forty-five patients with NETs were investigated with {sup 111}In-DOTA-TOC and {sup 111}In-DOTA-LAN scintigraphy. Scintigraphic results were compared with those of conventional imaging and/or surgery in each patient, and also {sup 18}F-fluorodeoxyglucose positron emission tomography (FDG-PET) in 20 patients. {sup 111}In-DOTA-TOC and {sup 111}In-DOTA-LAN scintigraphy were true positive in 42/45 (93%) and 39/45 (87%) patients, and imaged 74/91 (81%) and 73/91 (80%) tumour lesions, respectively. {sup 111}In-DOTA-TOC and {sup 111}In-DOTA-LAN detected liver metastases in 21 and 14 patients, mediastinal metastases in seven and 11 patients, and bone metastases in two and seven patients, respectively. These radioligands revealed lesions not seen by conventional imaging in seven and eight patients, respectively, or by {sup 18}F-FDG-PET in eight and seven patients, respectively. The estimated tumour absorbed doses for {sup 90}Y-DOTA-TOC were higher than those for {sup 90}Y-DOTA-LAN in 14 patients, whereas the opposite was true in 12 patients. Both {sup 111}In-DOTA-TOC and {sup 111}In-DOTA-LAN are suitable for imaging tumour lesions in patients with NETs and can detect lesions that may not be seen by conventional imaging and {sup 18}F-FDG-PET. Compared with {sup 111}In-DOTA-LAN, {sup 111}In-DOTA-TOC has a superior diagnostic capacity for liver metastases, but a

  11. New limits on 2ε, εβ{sup +} and 2β{sup +} decay of {sup 136}Ce and {sup 138}Ce with deeply purified cerium sample

    Energy Technology Data Exchange (ETDEWEB)

    Belli, P.; Bernabei, R. [INFN Sezione Roma ' ' Tor Vergata' ' , Rome (Italy); Universita di Roma ' ' Tor Vergata' ' , Dipartimento di Fisica, Rome (Italy); Boiko, R.S. [Institute for Nuclear Research, Kyiv (Ukraine); National University of Life and Environmental Sciences of Ukraine, Kyiv (Ukraine); Cappella, F. [INFN Sezione Roma, Rome (Italy); Cerulli, R.; Laubenstein, M. [INFN, Laboratori Nazionali del Gran Sasso, Assergi (Italy); Danevich, F.A.; Kropivyansky, B.N.; Polischuk, O.G.; Tretyak, V.I. [Institute for Nuclear Research, Kyiv (Ukraine); Incicchitti, A. [INFN Sezione Roma, Rome (Italy); Universita di Roma ' ' La Sapienza' ' , Dipartimento di Fisica, Rome (Italy); Mokina, V.M. [Institute for Nuclear Research, Kyiv (Ukraine); INFN Sezione Roma, Rome (Italy)

    2017-08-15

    A search for double electron capture (2ε), electron capture with positron emission (εβ{sup +}), and double positron emission (2β{sup +}) in {sup 136}Ce and {sup 138}Ce was realized with a 465 cm{sup 3} ultra-low background HP Ge γ spectrometer over 2299 h at the Gran Sasso underground laboratory. A 627 g sample of cerium oxide deeply purified by liquid-liquid extraction method was used as a source of γ quanta expected in double β decay of the cerium isotopes. New improved half-life limits were set on different modes and channels of double β decay of {sup 136}Ce and {sup 138}Ce at the level of T{sub 1/2} > 10{sup 17}-10{sup 18} yr. (orig.)

  12. Transfer pathways of {sup 54}Mn, {sup 57}Co, {sup 85}Sr, {sup 103}Ru and {sup 134}Cs in rice and radish plants directly contaminated at different growth stages

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Y.H. E-mail: yhchoi1@kaeri.re.kr; Lim, K.M.; Yu, D.; Park, H.G.; Choi, Y.G.; Lee, C.M

    2002-03-01

    In order to study radionuclide transfer pathways related to direct contamination of plants, the above-ground parts of rice and radish plants were sprayed with a solution containing {sup 54}Mn, {sup 57}Co, {sup 85}Sr, {sup 103}Ru and {sup 134}Cs in a greenhouse at 5 or 6 different times. Showing little difference among radionuclides, the interception factor increased as plants grew to maturity. Its highest observed value was 0.94 in rice and 0.83 in radish. Weathering losses of the intercepted activity by harvest were 32-89% in rice and 32-85% in radish depending on application time and radionuclide. Half lives for weathering loss were estimated to be longer on the whole for earlier applications. The translocation factor varied with application time by factors of 6-110 for hulled rice seeds and 2-23 for radish roots depending on the radionuclide. It varied with radionuclides by factors of 6-800 depending on application time and plant species. It was highest in the plants sprayed during active seed growth for rice and during early plant growth for radish. In general, {sup 134}Cs and {sup 57}Co had the highest translocation factors followed by {sup 54}Mn, {sup 85}Sr and {sup 103}Ru. Based on the experimental results, radionuclide concentrations in the edible parts of mature plants were predicted for unit deposition.

  13. Production of A/sub 2//sup 0/ and omega * (1675) in the reaction pi /sup -/p to pi /sup +/ pi /sup -/ pi /sup 0/n at 12 and 15 GeV/c

    CERN Document Server

    Corden, M J; Bellamy, E H; Corbett, I F; Dagan, S; Dowell, John D; Esterling, R J; Garvey, J; Gnat, Y; Green, M G; Harnew, N; Jobes, M; Kenyon, I R; Lipman, Norman H; Lister, J B; Lister, J R; Litchfield, P J; March, P V; Mawson, J; McMahon, T; Robertson, A W; Stacey, B J; Strong, J A; Sumorok, K; Thomas, D H

    1978-01-01

    Data on the reaction pi /sup -/p to pi /sup +/ pi /sup -/ pi /sup 0/n have been taken at 12 and 15 GeV/c with the CERN Omega multiparticle spectrometer. In a 3-pion partial-wave analysis strong production of A /sub 2//sup 0/ (1310) and omega * (1675) is observed. Total and differential cross sections are determined and density matrix elements presented as a function of t in the t- and s-channel frames. The energy dependence of A/sub 2//sup 0/ production is studied, and a comparison of omega (780), A/sub 2//sup 0/ (1310) and omega * (1675) production is made. (15 refs).

  14. High-statistics investigation of K/sup 0/K/sup -/ decay of A/sub 2 //sup -/ produced by 23-GeV/c pi /sup -/ on hydrogen

    CERN Document Server

    Margulies, M; Kramer, M A; Lindenbaum, S J; Love, W A; Ozaki, S; Platner, E D; Saulys, A C; Willen, E H

    1976-01-01

    Reports results of an experiment studying the reaction pi /sup -/p to K/sub s//sup 0/K/sup -/p at incident pion momenta of 22.4 and 23.9 GeV /c performed using the Brookhaven Mark 1 Spectrometer. Determines the A/sub 2//sup -/ mass spectrum in the t' regions 00.29 (GeV/c)/sup 2/. Observes no two-peak structure and finds that an overall CERN MMS dipole-type fit is rejected by 8 standard deviations. Shows that the differential cross section data are well fitted by Ate/sup bt/ with b equivalent to 7.0 (GeV/c)/sup -2/ and that the total cross sections for pi /sup -/p to A/sub 2//sup -/p are sigma =2.6+or-0.4 mu b and 2.5+or-0.4 mu b at 22.4 and 23.9 GeV/c respectively. (19 refs).

  15. Measurement of sup 15 O(. alpha. ,. gamma. ) sup 19 Ne resonance strengths

    Energy Technology Data Exchange (ETDEWEB)

    Magnus, P V; Smith, M S; Howard, A J; Parker, P D [Yale Univ., New Haven, CT (USA). Nuclear Structure Lab.; Champagne, A E [Princeton Univ., NJ (USA). Dept. of Physics

    1990-01-08

    States in {sup 19}Ne above the {sup 15}O+{alpha} threshold were populated by means of the {sup 19}F({sup 3}He,t){sup 19}Ne* reaction, and their alpha-particle decays to the {sup 15}O ground state were measured. The branching ratios {Gamma}{sub {alpha}}/{Gamma}{sub total} for the E{sub c.m.}=850-, 1020-, 1971-, 1183- and 1563-keV resonances in {sup 15}O+{alpha} were determined. This information together with alpha-particle and/or gamma-ray partial widths (determined from knowledge of these quantities for the mirror states in {sup 19}F) determines the strengths of these {sup 15}O({alpha},{gamma}){sup 19}Ne resonances and the {sup 15}O({alpha},{gamma}){sup 19}Ne reaction rate for temperatures between 7x10{sup 8} and 3x10{sup 9} K. (orig.).

  16. Dipole strength distribution below the giant dipole resonance in {sup 92}Mo, {sup 98}Mo and {sup 100}Mo

    Energy Technology Data Exchange (ETDEWEB)

    Rusev, G.Y.

    2006-07-01

    Investigations of the dipole-strength distributions in {sup 92}Mo, {sup 98}Mo and {sup 100}Mo were carried out by means of the method of nuclear resonance fluorescence. The low-lying excitations in the nuclides {sup 92}Mo, {sup 98}Mo and {sup 100}Mo have been studied in photon-scattering experiments at an electron energy of 6 MeV at the ELBE accelerator and at electron energies from 3.2 to 3.8 MeV at the Dynamitron accelerator. Five levels were observed in {sup 92}Mo. Five levels in {sup 98}Mo and 14 in {sup 100}Mo were identified for the first time in the energy range from 2 to 4 MeV. Dipole-strength distributions up to the neutron-separation energies in the nuclides {sup 92}Mo, {sup 98}Mo and {sup 100}Mo have been investigated at the ELBE accelerator. Because of the possible observation of transitions in the neighboring nuclei produced via ({gamma},n) reaction, additional measurements at electron energies of 8.4 and 7.8 MeV, below the neutron-separation energy, were performed on {sup 98}Mo and {sup 100}Mo, respectively. The number of transitions assigned to {sup 92}Mo, {sup 98}Mo and {sup 100}Mo is 340, 485 and 499, respectively, the main part of them being dipole transitions. Statistical properties of the observed transitions are obtained. The continuum contains the ground-state transitions as well as the branching transitions to the low-lying levels and the subsequent deexcitations of these levels. (orig.)

  17. ({sup 1} H, {sup 13} C and {sup 31} P) NMR of phosphonic acid derivatives; Ressonancia magnetica nuclear ({sup 1} H, {sup 13} C, {sup 31} P) de derivados do acido fosfonico

    Energy Technology Data Exchange (ETDEWEB)

    Campos, Valdevino; Costa, Valentim E. Uberti [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Inst. de Quimica

    1992-12-31

    In the last years the development of phosphates analogues in the medical and agricultural pesticides has being very expressive. {sup 1} H, {sup 13} C and mainly {sup 31} P NMR are used for stereochemical and conformational analysis, and reactivity studies on the compounds resulting from those chemical processes 2 refs., 4 figs., 1 tab.

  18. Long-term toxicity of [{sup 177}Lu-DOTA{sup 0},Tyr{sup 3}]octreotate in rats

    Energy Technology Data Exchange (ETDEWEB)

    Rolleman, Edgar J.; Krenning, Eric P.; Bernard, Bert F.; Visser, Monique de; Bijster, Magda; Jong, Marion de [Erasmus MC Rotterdam, Department of Nuclear Medicine, Rotterdam (Netherlands); Visser, Theo J. [Erasmus MC Rotterdam, Department of Internal Medicine, Rotterdam (Netherlands); Vermeij, Marcel [Erasmus MC Rotterdam, Department of Pathology, Rotterdam (Netherlands); Lindemans, Jan [Erasmus MC Rotterdam, Department of Clinical Chemistry, Rotterdam (Netherlands)

    2007-02-15

    Studies on peptide receptor radionuclide therapy (PRRT) using radiolabelled somatostatin analogues have shown promising results with regard to tumour control. The efficacy of PRRT is limited by uptake and retention in the proximal tubules of the kidney, which might lead to radiation nephropathy. We investigated the long-term renal toxicity after different doses of [{sup 177}Lu-DOTA{sup 0},Tyr{sup 3}]octreotate and the effects of dose fractionation and lysine co-injection in two tumour-bearing rat models. Significant renal toxicity was detected beyond 100 days after start of treatment as shown by elevated serum creatinine and proteinuria. Microscopically, tubules were strongly dilated with flat epithelium, containing protein cylinders. Creatinine levels rose significantly after 555 MBq [{sup 177}Lu-DOTA{sup 0},Tyr{sup 3}]octreotate, but were significantly lower after 278 MBq (single injection) or two weekly doses of 278 MBq. Renal damage scores were maximal after 555 MBq and significantly lower in the 278 and 2 x 278 MBq groups. Three doses of 185 MBq [{sup 177}Lu-DOTA{sup 0},Tyr{sup 3}]octreotate with intervals of a day, a week or a month significantly influenced serum creatinine (469{+-}18, 134{+-}70 and 65{+-}15 {mu}mol/l, respectively; p<0.001). Renal histological damage scores were not significantly influenced by dose fractionation. Lysine co-administration with three weekly treatments of 185 MBq significantly lowered serum creatinine and proteinuria. Injection of high doses of [{sup 177}Lu-DOTA{sup 0},Tyr{sup 3}]octreotate resulted in severe renal damage in rats as indicated by proteinuria, elevated serum creatinine and histological damage. This damage was dose dependent and became overt between 100 and 200 days after treatment. Dose fractionation had significant beneficial effects on kidney function. Also, lysine co-injection successfully prevented functional damage. (orig.)

  19. The branching ratio ω → π{sup +}π{sup -} revisited

    Energy Technology Data Exchange (ETDEWEB)

    Hanhart, C.; Xiao, C.W. [Forschungszentrum Juelich, Institut fuer Kernphysik, Institute for Advanced Simulation and Juelich Center for Hadron Physics, Juelich (Germany); Holz, S. [Universitaet Bonn, Helmholtz-Institut fuer Strahlen- und Kernphysik, Bonn (Germany); Kubis, B. [Universitaet Bonn, Helmholtz-Institut fuer Strahlen- und Kernphysik, Bonn (Germany); Universitaet Bonn, Bethe Center for Theoretical Physics, Bonn (Germany); Kupsc, A. [Uppsala University, Division of Nuclear Physics, Department of Physics and Astronomy, Box 516, Uppsala (Sweden); National Centre for Nuclear Research, High Energy Physics Department, Warsaw (Poland); Wirzba, A. [Forschungszentrum Juelich, Institut fuer Kernphysik, Institute for Advanced Simulation and Juelich Center for Hadron Physics, Juelich (Germany); University of California, Kavli Institute for Theoretical Physics, Kohn Hall, Santa Barbara, CA (United States)

    2017-02-15

    We analyze the most recent data for the pion vector form factor in the timelike region, employing a model-independent approach based on dispersion theory. We confirm earlier observations about the inconsistency of different modern high-precision data sets. Excluding the BaBar data, we find an updated value for the isospin-violating branching ratio B(ω → π{sup +}π{sup -}) = (1.46±0.08) x 10{sup -2}. As a side result, we also extract an improved value for the pion vector or charge radius, √(left angle r{sub V}{sup 2} right angle) = 0.6603(5)(4) fm, where the first uncertainty is statistical as derived from the fit, while the second estimates the possible size of nonuniversal radiative corrections. In addition, we demonstrate that modern high-quality data for the decay η{sup '} → π{sup +}π{sup -}γ will allow for an even improved determination of the transition strength ω → π{sup +}π{sup -}. (orig.)

  20. Structure effects in the region of superheavy elements via the alpha-decay chain of sup 2 sup 9 sup 3 118

    CERN Document Server

    Gupta, R K; Kumar, R; Balasubramaniam, M; Scheid, W

    2002-01-01

    The alpha-decay chain of sup 2 sup 9 sup 3 118, first proposed in the Berkeley cold fusion experiment sup 2 sup 0 sup 8 Pb( sup 8 sup 6 Kr, 1n) and now retracted, is calculated by using the preformed cluster model (PCM) of one of the authors (RKG). Also, the possible branchings of alpha-decays to heavier cluster decays of all the parents in this chain are calculated for the first time. The calculated Q-values, penetrabilities and preformation factors for alpha-decays suggest that the sup 2 sup 8 sup 5 114 nucleus with Z=114, N=171 is a magic nucleus, either due to the magicity of Z=114, or N=172 or both. The N=172 is proposed to be a magic number in certain relativistic mean-field calculations, but with Z 120. The calculated cluster decays point to new interesting possibilities of sup 1 sup 4 C decay of the sup 2 sup 8 sup 1 112 parent, giving rise to a (reasonably) deformed Z=106, N=161, sup 2 sup 6 sup 7 106 daughter (N=162 being now established as the deformed magic shell) or to a doubly magic sup 4 sup 8 ...