{beta}-Delayed proton-decay study of {sup 20}Mg and its implications for the {sup 19}Ne(p,{gamma}){sup 20}Na breakout reaction in X-ray bursts

Energy Technology Data Exchange (ETDEWEB)

Wallace, J.P., E-mail: J.P.Wallace@sms.ed.ac.uk [University of Edinburgh, Edinburgh, EH9 3JZ (United Kingdom); Woods, P.J.; Lotay, G. [University of Edinburgh, Edinburgh, EH9 3JZ (United Kingdom); Alharbi, A.; Banu, A. [Cyclotron Institute, Texas A and M University, College Station, TX (United States); David, H.M.; Davinson, T. [University of Edinburgh, Edinburgh, EH9 3JZ (United Kingdom); McCleskey, M.; Roeder, B.T.; Simmons, E.; Spiridon, A.; Trache, L.; Tribble, R.E. [Cyclotron Institute, Texas A and M University, College Station, TX (United States)

2012-05-30

Under astrophysical conditions of high temperature and density, such as for example found in X-ray bursts, breakout can occur from the hot CNO cycles into the rapid proton capture process. A key breakout route is via the sequence {sup 15}O({alpha},{gamma}){sup 19}Ne(p,{gamma}){sup 20}Na. The {sup 19}Ne(p,{gamma}){sup 20}Na reaction rate is expected to be dominated by a single resonance at 457(3) keV. The identity of the resonance has been under discussion for a long time, with J{sup {pi}}=1{sup +} and 3{sup +} assignments suggested. In this study of the {beta}-delayed proton decay of {sup 20}Mg we report a new, significantly more stringent, upper limit on the {beta}-decay branch to this state of 0.02% with a confidence level of 90%. This makes a 1{sup +} assignment highly unlikely and favours a 3{sup +} assignment for which no branch is expected to be observed. The 3{sup +} state is predicted to have a significantly higher resonance strength, and to produce a proportionately higher {sup 19}Ne(p,{gamma}){sup 20}Na reaction rate in X-ray burst conditions.

High-precision measurement of the 19Ne half-life and implications for right-handed weak currents.

Science.gov (United States)

Triambak, S; Finlay, P; Sumithrarachchi, C S; Hackman, G; Ball, G C; Garrett, P E; Svensson, C E; Cross, D S; Garnsworthy, A B; Kshetri, R; Orce, J N; Pearson, M R; Tardiff, E R; Al-Falou, H; Austin, R A E; Churchman, R; Djongolov, M K; D'Entremont, R; Kierans, C; Milovanovic, L; O'Hagan, S; Reeve, S; Sjue, S K L; Williams, S J

2012-07-27

We report a precise determination of the (19)Ne half-life to be T(1/2)=17.262±0.007 s. This result disagrees with the most recent precision measurements and is important for placing bounds on predicted right-handed interactions that are absent in the current standard model. We are able to identify and disentangle two competing systematic effects that influence the accuracy of such measurements. Our findings prompt a reassessment of results from previous high-precision lifetime measurements that used similar equipment and methods.

High-Precision Measurement of the Ne19 Half-Life and Implications for Right-Handed Weak Currents

Science.gov (United States)

Triambak, S.; Finlay, P.; Sumithrarachchi, C. S.; Hackman, G.; Ball, G. C.; Garrett, P. E.; Svensson, C. E.; Cross, D. S.; Garnsworthy, A. B.; Kshetri, R.; Orce, J. N.; Pearson, M. R.; Tardiff, E. R.; Al-Falou, H.; Austin, R. A. E.; Churchman, R.; Djongolov, M. K.; D'Entremont, R.; Kierans, C.; Milovanovic, L.; O'Hagan, S.; Reeve, S.; Sjue, S. K. L.; Williams, S. J.

2012-07-01

We report a precise determination of the Ne19 half-life to be T1/2=17.262±0.007s. This result disagrees with the most recent precision measurements and is important for placing bounds on predicted right-handed interactions that are absent in the current standard model. We are able to identify and disentangle two competing systematic effects that influence the accuracy of such measurements. Our findings prompt a reassessment of results from previous high-precision lifetime measurements that used similar equipment and methods.

Beam experiments with state selected Ne (3P0, 3P2) metastable atoms

International Nuclear Information System (INIS)

Verheijen, M.J.

1984-01-01

Metastable rare gas atoms play an important role in all types of plasmas and gas discharges, e.g. in fluorescent lamps and in laser discharges (helium-neon laser or excimer lasers). In this thesis, the metastable states of NeI are studied. First, the theory of excited neon atoms and diatomic molecules is introduced, as well as Penning ionisation. Next, some experimental facilities are described (e.g. the dye laser system). With these instruments, natural lifetime measurements of the 2p fine structure states of NeI are carried out. Results are reported. Finally, total Penning ionisation cross sections are calculated using the optical potential model. (Auth.)

Scattering study of the Ne + NeH{sup +}(v{sub 0} = 0, j{sub 0} = 0) → NeH{sup +} + Ne reaction on an ab initio based analytical potential energy surface

Energy Technology Data Exchange (ETDEWEB)

Koner, Debasish; Panda, Aditya N., E-mail: adi07@iitg.ernet.in [Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039 (India); Barrios, Lizandra; González-Lezana, Tomás, E-mail: t.gonzalez.lezana@csic.es [IFF-CSIC, Instituto de Física Fundamental, CSIC, Serrano 123, Madrid 28006 (Spain)

2016-01-21

Initial state selected dynamics of the Ne + NeH{sup +}(v{sub 0} = 0, j{sub 0} = 0) → NeH{sup +} + Ne reaction is investigated by quantum and statistical quantum mechanical (SQM) methods on the ground electronic state. The three-body ab initio energies on a set of suitably chosen grid points have been computed at CCSD(T)/aug-cc-PVQZ level and analytically fitted. The fitting of the diatomic potentials, computed at the same level of theory, is performed by spline interpolation. A collinear [NeHNe]{sup +} structure lying 0.72 eV below the Ne + NeH{sup +} asymptote is found to be the most stable geometry for this system. Energies of low lying vibrational states have been computed for this stable complex. Reaction probabilities obtained from quantum calculations exhibit dense oscillatory structures, particularly in the low energy region and these get partially washed out in the integral cross section results. SQM predictions are devoid of oscillatory structures and remain close to 0.5 after the rise at the threshold thus giving a crude average description of the quantum probabilities. Statistical cross sections and rate constants are nevertheless in sufficiently good agreement with the quantum results to suggest an important role of a complex-forming dynamics for the title reaction.

Breakout from the hot CNO cycle: the {sup 15}O({alpha},{gamma}) and {sup 18}Ne({alpha},p) reactions

Energy Technology Data Exchange (ETDEWEB)

Bradfield-Smith, W; Laird, A M; Davinson, T; Pietro, A di; Ostrowski, A N; Shotter, A C; Woods, P J [Dept. of Physics and Astronomy, Univ. of Edinburgh (United Kingdom); Cherubini, S; Galster, W; Graulich, J S; Leleux, P; Michel, L; Ninane, A; Vervier, J [Inst. de Physique Nucleaire, UCL, Louvain-la-Neuve (Belgium); Aliotta, M; Cali, D; Cappussello, F; Cunsolo, A; Spitaleri, C [INFN, Catania (Italy); Gorres, J; Wiescher, M [Notre Dame Univ. (United States); Rahighi, J [Van de Graaf Lab., Tehran (Iran, Islamic Republic of); Hinnefeld, J [Indiana Univ., South Bend (United States)

1998-06-01

One of the most important reactions which determines the rate of breakout from the hot CNO cycle is the {sup 15}O({alpha},{gamma}){sup 19}Ne. The reaction {sup 18}Ne({alpha},p){sup 21}Na may also provide an alternative breakout route. Experiments are being undertaken at Louvain-La-Neuve using the radioactive {sup 18}Ne beam to study these reactions by measurement of {alpha}({sup 18}Ne,p){sup 21}Na and d({sup 18}Ne,p){sup 19}Ne{sup *} {yields} {sup 15}O + {alpha} (orig.)

Two-protons' entanglement of the diproton emission from 17Ne halo resonant states

International Nuclear Information System (INIS)

Carballo Perez, Brenda; Guzman Martinez, Fernando

2006-01-01

Fingerprints of entangled states of the two protons, from the decay of halo resonant states of 17 Ne has been studied. This study makes possible a way to discern the diproton emission from the others two proton emission mechanisms. Specially we calculate the energy (E 1 =10.87 MeV) and the width (Γ 1 =3.82 MeV) of the first halo resonant state, which can also emits diproton. For this purpose, the diproton was considered as a resonant state and its width (Γ s =4.049 MeV) was estimated. An analytic expression for the angular proton-proton distribution was found in agreement with experimental results. We conclude that the first 17 Ne excited state can not emit diproton. We also arrive at the conclusion that there are few 17 Ne excited states, having halo properties which can emit diproton. (Full Text)

Measurements of recoil and projectile momentum distributions for 19-MeV F9+ + Ne collisions

International Nuclear Information System (INIS)

Frohne, V.; Cheng, S.; Ali, R.M.; Raphaelian, M.L.; Cocke, C.L.; Olson, R.

1996-01-01

The collision system of 19-MeV F 9+ on Ne has been studied using recoil and projectile momentum spectroscopy. For each event, identified by final recoil and projectile charge state, the three-dimensional momentum vector of the recoil ion and the transverse momentum vector of the projectile ion were measured. The transverse momenta of the recoil and projectile ions were found to be equal in magnitude and opposite in direction, indicating that the transverse momentum exchange is dominated by interactions between the two ion cores. The transverse momentum distributions are well described by nCTMC calculations. The longitudinal momentum distributions of the recoil ions show that a large fraction of the momentum transferred to the projectile is carried off by continuum electrons. The recoil ions are scattered slightly backward, in partial agreement with predictions of nCTMC calculations. copyright 1996 The American Physical Society

Nuclear magnetic and electric dipole moments of neon-19

International Nuclear Information System (INIS)

MacArthur, D.W.

1983-01-01

This thesis presents a detailed discussion of a series of experiments designed to measure the magnetic and electric dipole moments of the β-emitting nucleus 19 Ne. The 19 Ne is generated in the reaction 19 F(p,n) 19 Ne and is polarized by a ''stern-Gerlach'' magnet in a rare gas atomic beams machine. The atoms are stored in a cell for many seconds without depolarizing. The parity violating asymmetry in the β angular distribution is used to monitor the nuclear polarization. The polarized atoms are stored in a cell in a uniform magnetic field. The β-asymmetry is monitored by a pair of β-detectors located on either side of the cell. Transitions between the M/sub J/ = +1/2 and M/sub J/ = -1/2 spin states are induced by an rf field generated by a small Helmholtz coil pair surrounding the cell. Nuclear magnetic resonance lines are observed and the magnetic moment of 19 Ne measured to be μ( 19 Ne) = -1.88542(8)μ/sub N/. A new magnet, cell and detectors were designed to give narrow resonance lines. The equipment is described in detail and several resonance line shapes are discussed. The narrowest resonance line achieved with this system was 0.043 Hz FWHM. This width is primarily due to the 19 Ne lifetime. Pulsed NMR lineshapes were also observed. The narrow NMR lines observed in the previous experiment were then used as a probe to look for an electric dipole moment (EDM) in 19 Ne. Any shift in the resonance frequency correlated with changes in an externally applied electric field would be evidence for an EDM. The EDM of the 19 Ne atom was measured to (7.2 +/- 6.2 X 10 -22 e-cm. This experiment and possible improvements are discussed in detail

The g-factor of the first excited 4+ state in 20Ne from transient field precession measurement in gadolinium

International Nuclear Information System (INIS)

Tandon, P.N.; Speidel, K.H.; Mertens, V.; Trolenberg, W.; Kumbartzki, G.S.; Ayres de Campos, N.; Goldberg, M.B.; Gerber, J.; Toulemonde, M.

1981-01-01

The g-factor of the 4 + state in 20 Ne at 4.25 MeV has been obtained to be g = +0.08(20) from transient field precession measurements in Gd in agreement with the present authors' earlier reported value of g =- 0.10(19) (1980). The significant reduction in the value of the g- factor, g = -0.01(14), relative to that of the 2 + state (g = + 0.54(4))(1975) is in complete disagreement with theory. In addition the life time of the 4 + state has been measured to be tau = 95(13) fs. (author)

Studies of continuum states in${16}$ Ne using three-body correlation techniques

CERN Document Server

Marganiec, J; Aksouh, F; Aksyutina, Yu; Alvarez-Pol, H; Aumann, T; Beceiro-Novo, S; Boretzky, K; Borge, M J G; Chartier, M; Chatillon, A; Chulkov, L V; Cortina-Gil, D; Emling, H; Ershova, O; Fraile, L M; Fynbo, H O U; Galaviz, D; Geissel, H; Heil, M; Hoffmann, D H H; Hoffmann, J; Johansson, H T; Jonson, B; Karagiannis, C; Kiselev, O A; Kratz, J V; Kulessa, R; Kurz, N; Langer, C; Lantz, M; Le Bleis, T; Lemmon, R; Litvinov, Yu A; Mahata, K; Müntz, C; Nilsson, T; Nociforo, C; Nyman, G; Ott, W; Panin, V; Paschalis, S; Perea, A; Plag, R; Reifarth, R; Richter, A; Rodriguez-Tajes, C; Rossi, D; Riisager, K; Savran, D; Schrieder, G; Simon, H; Stroth, J; Sümmerer, K; Tengblad, O; Weick, H; Wiescher, M; Wimmer, C; Zhukov, M V

2015-01-01

Two-proton decay of the unbound $ T_{z} =-2$ nucleus$^{16}$Ne , produced in one-neutron knockout from a 500 MeV/u$^{17}$Ne beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, ( $ \\Gamma =0.082(15)$ MeV) above the$^{14}$O +p+p threshold, and two narrow resonances at $ E_{r} =3.220(46)$ MeV and 7.57(6) MeV have been investigated. A comparison of the energy difference between the first excited 2$^{+}$ state and the 0$^{+}$ ground state in$^{16}$Ne with its mirror nucleus$^{16}$C reveals a small Thomas-Ehrman shift (TES) of $ +70(46)$ keV. A trend of the TES for the T = 2 quintet is obtained by completing the known data with a prediction for$^{16}$F obtained from an IMME analysis. The decay mechanisms of the observed three resonances were revealed from an analysis of the energy and angular correlations of the$^{14}$O +p+p decay products. The ground state decay can be considered as a genuine three-body (democratic) mode and the excited states decay sequentially via states in the i...

Studies of continuum states in {sup 16}Ne using three-body correlation techniques

Energy Technology Data Exchange (ETDEWEB)

Marganiec, J. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Research Division GSI, ExtreMe Matter Institute EMMI, Darmstadt (Germany); Wamers, F. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Research Division GSI, ExtreMe Matter Institute EMMI, Darmstadt (Germany); Frankfurt Institute for Advanced Studies FIAS, Frankfurt am Main (Germany); Aksouh, F.; Aksyutina, Yu.; Boretzky, K.; Chatillon, A.; Emling, H.; Geissel, H.; Heil, M.; Hoffmann, J.; Karagiannis, C.; Kiselev, O.A.; Kurz, N.; Litvinov, Yu.A.; Muentz, C.; Nociforo, C.; Ott, W.; Rossi, D.; Simon, H.; Suemmerer, K.; Weick, H. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Alvarez-Pol, H.; Beceiro-Novo, S.; Cortina-Gil, D.; Rodriguez-Tajes, C. [Universidade de Santiago de Compostela, Grupo de Fisica Nuclear, Santiago de Compostela (Spain); Aumann, T.; Panin, V. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Borge, M.J.G. [CERN, ISOLDE-EP, Geneva (Switzerland); CSIC, Instituto de Estructura de la Materia, Madrid (Spain); Chartier, M. [University of Liverpool, Department of Physics, Liverpool (United Kingdom); Chulkov, L.V. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Kurchatov Institute, Moscow (Russian Federation); Ershova, O.; Langer, C.; Plag, R.; Reifarth, R.; Wimmer, C. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Goethe Universitaet, Institut fuer Angewandte Physik, Frankfurt am Main (Germany); Fraile, L.M. [Universidad Complutense de Madrid, CEI Moncloa, Grupo de Fisica Nuclear, FAMN, Madrid (Spain); Fynbo, H.O.U.; Riisager, K. [University of Aarhus, Department of Physics and Astronomy, Aarhus (Denmark); Galaviz, D.; Perea, A.; Tengblad, O. [CSIC, Instituto de Estructura de la Materia, Madrid (Spain); Hoffmann, D.H.H.; Richter, A.; Schrieder, G. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); Johansson, H.T.; Jonson, B.; Nilsson, T.; Nyman, G.; Zhukov, M.V. [Chalmers Tekniska Hoegskola, Fundamental Fysik, Goeteborg (Sweden); Kratz, J.V. [Johannes Gutenberg-Universitaet Mainz, Institut fuer Kernchemie, Mainz (Germany); Kulessa, R. [Uniwersytet Jagellonski, Instytut Fizyki, Krakov (Poland); Lantz, M. [Uppsala Universitet, Institutionen foer fysik och astronomi, Uppsala (Sweden); Le Bleis, T. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Technische Universitaet Muenchen, Physik-Department E12, Garching (Germany); Lemmon, R. [STFC Daresbury Lab, Warrington, Nuclear Physics Group, Cheshire (United Kingdom); Mahata, K. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Bhabha Atomic Research Centre, Nuclear Physics Division, Trombay (India); Paschalis, S. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); University of Liverpool, Department of Physics, Liverpool (United Kingdom); Savran, D. [Research Division GSI, ExtreMe Matter Institute EMMI, Darmstadt (Germany); Frankfurt Institute for Advanced Studies FIAS, Frankfurt am Main (Germany); Stroth, J. [Goethe Universitaet, Institut fuer Angewandte Physik, Frankfurt am Main (Germany); Wiescher, M. [University of Notre Dame, JINA, Notre Dame, IN (United States)

2015-01-01

Two-proton decay of the unbound T{sub z} =-2 nucleus {sup 16}Ne, produced in one-neutron knockout from a 500 MeV/u {sup 17}Ne beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, (Γ = 0.082(15) MeV) above the {sup 14}O+p+p threshold, and two narrow resonances at E{sub r} = 3.220(46) MeV and 7.57(6) MeV have been investigated. A comparison of the energy difference between the first excited 2{sup +} state and the 0{sup +} ground state in {sup 16}Ne with its mirror nucleus {sup 16}C reveals a small Thomas-Ehrman shift (TES) of +70(46) keV. A trend of the TES for the T = 2 quintet is obtained by completing the known data with a prediction for {sup 16}F obtained from an IMME analysis. The decay mechanisms of the observed three resonances were revealed from an analysis of the energy and angular correlations of the {sup 14}O+p+p decay products. The ground state decay can be considered as a genuine three-body (democratic) mode and the excited states decay sequentially via states in the intermediate nucleus {sup 15}F, the 3.22 MeV state predominantly via the {sup 15}F ground-state resonance, while the 7.57 MeV state decays via the 5/2{sup +} resonance in {sup 15}F at 2.8 MeV above the {sup 14}O+p+p threshold. Further, from an analysis of angular correlations, the spin-parity of the 7.57 MeV state has been determined as I{sup π} = 2{sup +} and assigned as the third 2{sup +} state in {sup 16}Ne based on a comparison with {sup 16}C. (orig.)

19 CFR Appendix C to Part 113 - Bond for Deferral of Duty on Large Yachts Imported for Sale at United States Boat Shows

Science.gov (United States)

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Bond for Deferral of Duty on Large Yachts Imported... Appendix C to Part 113—Bond for Deferral of Duty on Large Yachts Imported for Sale at United States Boat Shows Bond for Deferral of Duty on Large Yachts Imported for Sale at United States Boat Shows ____, as...

31 CFR 19.1005 - State.

Science.gov (United States)

2010-07-01

... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false State. 19.1005 Section 19.1005 Money... (NONPROCUREMENT) Definitions § 19.1005 State. (a) State means— (1) Any of the states of the United States; (2) The... States; or (5) Any agency or instrumentality of a state. (b) For purposes of this part, State does not...

Observation of Two-Proton Radioactivity of 19Mg by Tracking the Decay Products

International Nuclear Information System (INIS)

Mukha, I.; Alvarez, M. A. G.; Espino, J.; Gomez-Camacho, J.; Suemmerer, K.; Chatillon, A.; Geissel, H.; Hoffmann, J.; Kurz, N.; Litvinov, Yu.; Nociforo, C.; Ott, W.; Roeckl, E.; Weick, H.; Acosta, L.; Garcia-Ramos, J. E.; Martel, I.; Casarejos, E.; Cortina-Gil, D.; Rodriguez-Tajes, C.

2007-01-01

We have observed the two-proton radioactivity of the previously unknown 19 Mg ground state by tracking the decay products in-flight. For the first time, the trajectories of the 2p-decay products, 17 Ne+p+p, have been measured by using tracking microstrip detectors which allowed us to reconstruct the 2p-decay vertices and fragment correlations. The half-life of 19 Mg deduced from the measured vertex distribution is 4.0(15) ps in the system of 19 Mg. The Q value of the 2p decay of the 19 Mg ground state inferred from the measured p-p- 17 Ne correlations is 0.75(5) MeV

Collision-induced intramultiplet mixing for the Ne**[(2p)5(3p)] + He or Ne system

International Nuclear Information System (INIS)

Manders, M.P.I.

1988-01-01

For the Ne**-He case, experimental data are confronted with quantum mechanical calculations. Quantum mechanical coupled-channel calculations using model potentials as input are presented, followed by a semiclassical approach which provides more physical insight. Experimental results are presented for the Ne**-Ne system with a discussion of the general principles involved in symmetrization. 184 refs.; 93 figs.; 19 tabs

Production of the Ne Auger electrons by Ne/sup +/ bombardment of Mg and Al surfaces

Energy Technology Data Exchange (ETDEWEB)

Ferrante, J; Pepper, S V [National Aeronautics and Space Administration, Cleveland, Ohio (USA). Lewis Research Center

1976-07-01

The authors have bombarded Mg and Al surfaces with Ne/sup +/ ions and in this letter present evidence for the production of an inner shell vacancy in the Ne by the asymmetric Ne-Mg and Ne-Al collision. In addition, autoionization states of neutral Ne have been observed. These states are to be distinguished from the more usual case in Auger electron spectroscopy of de-excitation of an ion with a core vacancy.

THE INFLUENCE OF UNCERTAINTIES IN THE 15O(α, γ)19Ne REACTION RATE ON MODELS OF TYPE I X-RAY BURSTS

International Nuclear Information System (INIS)

Davids, Barry; Cyburt, Richard H.; Jose, Jordi; Mythili, Subramanian

2011-01-01

We present a Monte Carlo calculation of the astrophysical rate of the 15 O(α, γ) 19 Ne reaction based on an evaluation of published experimental data. By considering the likelihood distributions of individual resonance parameters derived from measurements, estimates of upper and lower limits on the reaction rate at the 99.73% confidence level are derived in addition to the recommended, median value. These three reaction rates are used as input for three separate calculations of Type I X-ray bursts (XRBs) using spherically symmetric, hydrodynamic simulations of an accreting neutron star. In this way the influence of the 15 O(α, γ) 19 Ne reaction rate on the peak luminosity, recurrence time, and associated nucleosynthesis in models of Type I XRBs is studied. Contrary to previous findings, no substantial effect on any of these quantities is observed in a sequence of four bursts when varying the reaction rate between its lower and upper limits. Rather, the differences in these quantities are comparable to the burst-to-burst variations with a fixed reaction rate, indicating that uncertainties in the 15 O(α, γ) 19 Ne reaction rate do not strongly affect the predictions of this Type I XRB model.

Comparison of electromagnetic and nuclear dissociation of 17Ne

Science.gov (United States)

Wamers, F.; Marganiec, J.; Aksouh, F.; Aksyutina, Yu.; Alvarez-Pol, H.; Aumann, T.; Beceiro-Novo, S.; Bertulani, C. A.; Boretzky, K.; Borge, M. J. G.; Chartier, M.; Chatillon, A.; Chulkov, L. V.; Cortina-Gil, D.; Emling, H.; Ershova, O.; Fraile, L. M.; Fynbo, H. O. U.; Galaviz, D.; Geissel, H.; Heil, M.; Hoffmann, D. H. H.; Hoffman, J.; Johansson, H. T.; Jonson, B.; Karagiannis, C.; Kiselev, O. A.; Kratz, J. V.; Kulessa, R.; Kurz, N.; Langer, C.; Lantz, M.; Le Bleis, T.; Lehr, C.; Lemmon, R.; Litvinov, Yu. A.; Mahata, K.; Müntz, C.; Nilsson, T.; Nociforo, C.; Ott, W.; Panin, V.; Paschalis, S.; Perea, A.; Plag, R.; Reifarth, R.; Richter, A.; Riisager, K.; Rodriguez-Tajes, C.; Rossi, D.; Savran, D.; Schrieder, G.; Simon, H.; Stroth, J.; Sümmerer, K.; Tengblad, O.; Typel, S.; Weick, H.; Wiescher, M.; Wimmer, C.

2018-03-01

The Borromean drip-line nucleus 17Ne has been suggested to possess a two-proton halo structure in its ground state. In the astrophysical r p -process, where the two-proton capture reaction 15O(2 p ,γ )17Ne plays an important role, the calculated reaction rate differs by several orders of magnitude between different theoretical approaches. To add to the understanding of the 17Ne structure we have studied nuclear and electromagnetic dissociation. A 500 MeV/u 17Ne beam was directed toward lead, carbon, and polyethylene targets. Oxygen isotopes in the final state were measured in coincidence with one or two protons. Different reaction branches in the dissociation of 17Ne were disentangled. The relative populations of s and d states in 16F were determined for light and heavy targets. The differential cross section for electromagnetic dissociation (EMD) shows a continuous internal energy spectrum in the three-body system 15O+2 p . The 17Ne EMD data were compared to current theoretical models. None of them, however, yields satisfactory agreement with the experimental data presented here. These new data may facilitate future development of adequate models for description of the fragmentation process.

The state of the NeXus data format

International Nuclear Information System (INIS)

Koennecke, Mark

2006-01-01

NeXus is an effort by an international group of scientists to define a common data exchange format for neutron, muon and X-ray scattering. NeXus has six levels: a physical file format, a file structure, rules for storing individual data items in a file, a dictionary of names, instrument definitions and an application programming interface (API) to NeXus files. The authors will present the large steps forward which have been made both with instrument definitions and the NeXus-API

Many-particle and many-hole states in neutron-rich Ne isotopes related to broken N=20 shell closure

International Nuclear Information System (INIS)

Kimura, Masaaki; Horiuchi, Hisashi

2004-01-01

The low-lying level structures of 26 Ne, 28 Ne and 30 Ne which are related to the breaking of the N=20 shell closure have been studied in the framework of the deformed-basis anti-symmetrized molecular dynamics plus generator coordinate method using the Gogny D1S force. The properties of the many-particle and many-hole states are studied as well as that of the ground band. We predict that the negative-parity states, in which neutrons are promoted into the pf-orbit from the sd orbit, have a small excitation energy in the cases of 28 Ne and 30 Ne. We regard this to be a typical phenomena accompanying the breaking of the N=20 shell closure. It is also found that the neutron 4p4h structure of 30 Ne appears at low excitation energy, which contains α + 16 O correlations. (author)

Investigation of the parity forbidden alpha decay of 20Ne

International Nuclear Information System (INIS)

Disque, M.

1978-01-01

In this thesis the alpha decay of excited states in 20 Ne is investigated. The excited neon states are formed by proton bombardment of 19 F at proton energie of 340 and 670 kev. The ratio E of the parity forbidden alpha decays leading to the ground state of 160 to the allowed decays is determined. The results are E = 7.4 x 10 -5 resonance at 340 kev, E = 4.2 x 10 -3 resonance at 670 kev. (FKS)

Single-particle and collective states in transfer reactions

International Nuclear Information System (INIS)

Lhenry, I.; Suomijaervi, T.; Giai, N. van

1993-01-01

The possibility to excite collective states in transfer reactions induced by heavy ions is studied. Collective states are described within the Random Phase Approximation (RPA) and the collectivity is defined according to the number of configurations contributing to a given state. The particle transfer is described within the Distorted Wave Born Approximation (DWBA). Calculations are performed for two different stripping reactions: 207 Pb( 20 Ne, 19 Ne) 208 Pb and 59 Co( 20 Ne, 19 F) 60 Ni at 48 MeV/nucleon for which experimental data are available. The calculation shows that a sizeable fraction of collective strength can be excited in these reactions. The comparison with experiment shows that this parameter-free calculation qualitatively explains the data. (author) 19 refs.; 10 figs

Nuclear transfer reaction measurements at the ESR-for the investigation of the astrophysical O-15(alpha,gamma)Ne-19 reaction

NARCIS (Netherlands)

Doherty, D. T.; Woods, P. J.; Litvinov, Yu A.; Najafi, M. Ali; Bagchi, S.; Bishop, S.; Bo, M.; Brandau, C.; Davinson, T.; Dillmann, I.; Estrade, A.; Egelhof, P.; Evdokimov, A.; Gumberidze, A.; Heil, M.; Lederer, C.; Litvinov, S. A.; Lotay, G.; Kalantar-Nayestanaki, N.; Kiselev, O.; Kozhuharov, C.; Kroell, T.; Mahjour-Shafei, M.; Mutterer, M.; Nolden, F.; Petridis, N.; Popp, U.; Reifarth, R.; Rigollet, C.; Roy, S.; Steck, M.; Stoehlker, Th; Streicher, B.; Trotsenko, S.; von Schmid, M.; Yan, X. L.; Zamora, J. C.

2015-01-01

Astrophysical x-ray bursts are thought to be a result of thermonuclear explosions on the atmosphere of an accreting neutron star. Between these bursts, energy is thought to be generated by the hot CNO cycles. The O-15(alpha,gamma)Ne-19 reaction is one reaction that allows breakout from these CNO

Nuclear transfer reaction measurements at the ESR-for the investigation of the astrophysical O-15(alpha,gamma)Ne-19 reaction

NARCIS (Netherlands)

Doherty, D. T.; Woods, P. J.; Litvinov, Yu A.; Najafi, M. Ali; Bagchi, S.; Bishop, S.; Bo, M.; Brandau, C.; Davinson, T.; Dillmann, I.; Estrade, A.; Egelhof, P.; Evdokimov, A.; Gumberidze, A.; Heil, M.; Lederer, C.; Litvinov, S. A.; Lotay, G.; Kalantar-Nayestanaki, N.; Kiselev, O.; Kozhuharov, C.; Kroell, T.; Mahjour-Shafei, M.; Mutterer, M.; Nolden, F.; Petridis, N.; Popp, U.; Reifarth, R.; Rigollet, C.; Roy, S.; Steck, M.; Stoehlker, Th; Streicher, B.; Trotsenko, S.; von Schmid, M.; Yan, X. L.; Zamora, J. C.

Astrophysical x-ray bursts are thought to be a result of thermonuclear explosions on the atmosphere of an accreting neutron star. Between these bursts, energy is thought to be generated by the hot CNO cycles. The O-15(alpha,gamma)Ne-19 reaction is one reaction that allows breakout from these CNO

The breakout of the Hot CNO cycle via ^18Ne resonant states

Science.gov (United States)

Almaraz-Calderon, S.; Tan, W.; Aprahamian, A.; Bucher, B.; Gorres, J.; Roberts, A.; Villano, A.; Wiescher, M.; Brune, C.; Heinen, Z.; Massey, T.; Ozkan, N.; Guray, R. T.; Mach, H.

2010-11-01

The energy generation rate in the HCNO cycle is limited by the β decay of the waiting point nuclei ^14O and ^15O. However, when the temperatures and densities are high enough (e.g. Novae and X-ray Bursts) it is possible to bypass them by p/α captures resulting in a thermonuclear runaway towards the rp-process. One of the two paths for breakouts from the HCNO cycle is the reaction chain ^14O(α,p)^17F(p,γ)^18Ne(α,p), which proceeds through resonant states on ^18Ne, making their reactions rates very sensitive on the partial and total widths, excitation energies and spins of such resonances. We studied the resonant states in ^18Ne via ^16O(^3He,n) reaction. The neutrons were measured with an array of liquid scintillators using Time-of-Flight and pulse-shape discrimination techniques. The charged particles were detected in coincidence with neutrons by an array of silicon detectors, allowing us to measure α, p, p' and 2p decay branching ratios. Tentative spin assignments were made in comparison with zero range DWBA calculations. This new information will be included in reaction network calculations to evaluate its impact on the nuclear energy generation that occurs in these stellar explosive environments.

2He decay from excited states: the 18Ne case

International Nuclear Information System (INIS)

Raciti, G.; Sfienti, C.; De Napoli, M.; Rapisarda, E.; Cardella, G.; Giacoppo, F.

2011-01-01

Two-proton radioactivity studies have been performed on excited states of 18 Ne produced by 20 Ne fragmentation at the FRIBs facility of the Laboratori Nazionali del Sud. The study of the relative-momentum correlations of the two protons allowed to disentangle the diproton, democratic and sequential decay contributions to the 2p emission. In order to extend the study on two-proton decay to other light-masses nuclei, an upgrade of the FRIBs facility is planned. A new configuration of the Fragment Separator would be able to increase the acceptance of the beam line and therefore the yield of the produced radioactive beams. Also the present tagging setup will be modified in view of the gain intensity, in order to sustain the higher foreseen incoming rate. Status and perspectives of the facility will be presented. (author)

NE2561 and NE2611A - are they different?

International Nuclear Information System (INIS)

Huntley, R.; Boas, J.; Kotler, L.; Webb, D.; Stucki, G.

2000-01-01

Full text: Evidence is mounting that the nominally identical ionization chamber types NE2561 and NE2611A have significantly different energy dependences. This is revealed by comparing the radiation quality correction factors k q . The factor k q is the ratio of the absorbed dose to water calibration factors (for a particular type of ionization chamber) at radiation quality Q to that for 60 Co. k q values for NE2561 and NE2611A chambers have been compared for various kV and MV X-ray beams at several standards laboratories. Measurements at ARPANSA (Australia) on six NE2561 and five NE2611A show a consistent difference in k q of 1-2% for 16 and 19 MV X-rays. Work at OFMET (Switzerland) has shown similar differences at 6 and 18 MV. No such differences are seen at NPL (UK) - this inconsistency is currently ascribed to differences in the radiation beams. Consistent differences of up to 3% between these two chamber types have been observed at both ARPANSA and NRC (Canada) at the BIPM medium energy X-ray intercomparison qualities between 50 kV and 250 kV. We conclude that the two types of chamber should not be regarded as identical. ARPANSA and several other laboratories in Europe and North America will shortly participate in a Euromet project to be coordinated by OFMET, to investigate high energy X-ray beam quality specifiers. This project will provide additional data that may lead to a better understanding of this anomaly. Copyright (2000) Australasian College of Physical Scientists and Engineers in Medicine

Prospects for Antineutrino Running at MiniBooNE

OpenAIRE

Wascko, M. O.

2006-01-01

MiniBooNE began running in antineutrino mode on 19 January, 2006. We describe the sensitivity of MiniBooNE to LSND-like nuebar oscillations and outline a program of antineutrino cross-section measurements necessary for the next generation of neutrino oscillation experiments. We describe three independent methods of constraining wrong-sign (neutrino) backgrounds in an antineutrino beam, and their application to the MiniBooNE antineutrino analyses.

Quenching of 4He(21S,21P) and 3He(21S,21P) states by collisions with Ne(1S0) atoms

International Nuclear Information System (INIS)

Blagoev, K.B.; Dimova, E.; Petrov, G.M.

2004-01-01

The cross sections and rate constants for quenching 4 He(2 1 S), 4 He(2 1 P), 3 He(2 1 S) and 3 He(2 1 P) states by collisions with ground state Ne atoms are measured by a time-resolved method in a He-Ne electron beam excited plasma at low pressure. These rate constants at T g =600 K are: k 4 He(2 1 S) =(1.6±0.2)x10 -10 , k 4 He(2 1 P) =(3.4±2.5)x10 -10 , k 3 He(2 1 S) =(1.6±0.2)x10 -10 and k 3 He(2 1 P) =(5.7±1.2)x10 -10 cm 3 s -1 . The cross sections derived from the rate constant are σ 4 He(2 1 S) =(8.4±0.8)x10 -16 , σ 4 He(2 1 P) =(1.8±1.3)x10 -15 , σ 3 He(2 1 S) =(7.1±0.9)x10 -16 and σ 3 He(2 1 P) =(2.6±0.5)x10 -15 cm 2 , respectively. The diffusion coefficient of 3 He(2 1 S) in 3 He is estimated to be D 3 He(2 1 S)- 3 He =1.9D 4 He(2 1 S)- 4 He , based on comparison with 4 He. A time-dependent collisional radiative model for an e-beam sustained He-Ne plasma is developed and the predicted line intensity of NeI λ=6328 A line is compared with the experimental data. The influence of different processes involved in population and depopulation dynamics of He(2 1 S) state are evaluated

Investigation of valence inter-multiplet Auger transitions in Ne following 1s photoelectron recapture

International Nuclear Information System (INIS)

De Fanis, A; Pruemper, G; Hergenhahn, U; Kukk, E; Tanaka, T; Kitajima, M; Tanaka, H; Fritzsche, S; Kabachnik, N M; Ueda, K

2005-01-01

We employ a novel technique in which highly excited Rydberg states of Ne + 2p 4n p are populated via PCI-induced recapture of the near-threshold 1s photoelectron (De Fanis et al 2004 Phys. Rev. A 70 040702) to investigate valence inter-multiplet Auger transitions. The following series of the transitions have been observed: Ne + 2p 4 ( 1 D)np 2 L → Ne 2+ 2p 4 3 P J , Ne + 2p 4 ( 1 S)np 2 P →Ne 2+ 2p 4 3 P J and Ne + 2p 4 ( 1 S)np 2 P →Ne 2+ 2p 4 1 D. Their energy positions, quantum defects and the anisotropy parameters of the Auger electron emission have been determined. Experimental results are in good agreement with multi-configuration Dirac-Fock calculations carried out as a part of this study. The importance of interference effects for decays via naturally overlapping fine-structure components of the intermediate state is discussed

^2H(^18F,p)^19F Study at 6 MeV/u

Science.gov (United States)

Kozub, R. L.; Nesaraja, C. D.; Moazen, B. H.; Scott, J. P.; Bardayan, D. W.; Blackmon, J. C.; Gross, C. J.; Shapira, D.; Smith, M. S.; Batchelder, J. C.; Brune, C. R.; Champagne, A. E.; Sahin, L.; Cizewski, J. A.; Thomas, J. S.; Davinson, T.; Woods, P. J.; Greife, U.; Jewett, C.; Livesay, R. J.; Ma, Z.; Parker, P. D.

2003-04-01

The degree to which the (p,α) and (p,γ) reactions destroy ^18F at temperatures ˜1-4 x 10^8 K is important for understanding the synthesis of nuclei in nova explosions and for using ^18F as a monitor of nova mechanisms in gamma ray astronomy. The reactions are dominated by low-lying proton resonances near the ^18F+p threshold (E_x=6.411 MeV excitation energy in ^19Ne). To gain further information about these resonances, we have used the inverse ^18F(d,p)^19F neutron transfer reaction at the Holifield Radioactive Ion Beam Facility to selectively populate corresponding mirror states in ^19F. Proton angular distributions were measured for states in ^19F in the excitation energy range 0-9 MeV. Results and implications for the ^18F+p reactions and nuclear structure will be presented. ^1Supported by DOE. ^2ORNL is managed by UT-Battelle, LLC, for the USDOE.

28 CFR 90.19 - State office.

Science.gov (United States)

2010-07-01

... 28 Judicial Administration 2 2010-07-01 2010-07-01 false State office. 90.19 Section 90.19...¢ Training ⢠Officers ⢠Prosecutors) Violence Against Women Formula Grant Program § 90.19 State office. (a... office for the purposes of: (1) Certifying qualifications for funding under this subpart B; (2...

7 CFR 1215.19 - State.

Science.gov (United States)

2010-01-01

... 7 Agriculture 10 2010-01-01 2010-01-01 false State. 1215.19 Section 1215.19 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... CONSUMER INFORMATION Popcorn Promotion, Research, and Consumer Information Order Definitions § 1215.19...

Main channels of the decay of the giant dipole resonance in the 20,22Ne nuclei and isospin splitting of the giant dipole resonance in the 22Ne nucleus

International Nuclear Information System (INIS)

Varlamov, V.V.; Stepanov, M.E.

2002-01-01

Data published in the literature on various photonuclear reactions for the 20,22 Ne isotopes and for their natural mixture are analyzed with the aim of exploring special features of the decay of giant-dipole-resonance states in these two isotopes. With the aid of data on the abundances of the isotopes and on the energy reaction thresholds, the cross sections for the reactions 20,22 Ne[(γ, n) + (γ, np)] and 20,22 Ne[(γ, p) + (γ, np)] are broken down into the contributions from the one-nucleon reactions (γ, n) and (γ, p) and the contributions from the reactions (γ, np). The cross sections evaporation model used here to treat the deexcitation of residual nucle(γ, p) 19,21 F in the energy range E γ = 16.0-28.0 MeV and the cross sections for the reactions 20,22 Ne(γ, np) 18,20 F in the energy range E γ = 23.3-28.0 MeV are estimated. The behavior of the cross-section ratio r = σ(γ, p)/σ(γ, n) for the 22 Ne nucleus as a function of energy is analyzed, and the isospin components of the giant dipole resonance in the 22 Ne nucleus are identified. The contributions of the isospin components of the giant dipole resonance in the 22 Ne nucleus to the cross sections for various photonuclear reactions are determined on the basis of an analysis of the diagram of the excitation and decay of pure isospin states in the 22 Ne nucleus and in nuclei neighboring it, which are members of the corresponding isospin multiplets. The isospin splitting of the giant dipole resonance and the ratio of the intensities of the isospin components are determined to be ΔE = 4.57 ± 0.69 MeV and R = 0.24 ± 0.04, respectively

Product state resolved excitation spectroscopy of He-, Ne-, and Ar-Br2 linear isomers: experiment and theory.

Science.gov (United States)

Pio, Jordan M; van der Veer, Wytze E; Bieler, Craig R; Janda, Kenneth C

2008-04-07

Valence excitation spectra for the linear isomers of He-, Ne-, and Ar-Br2 are reported and compared to a two-dimensional simulation using the currently available potential energy surfaces. Excitation spectra from the ground electronic state to the region of the inner turning point of the Rg-Br2 (B,nu') stretching coordinate are recorded while probing the asymptotic Br2 (B,nu') state. Each spectrum is a broad continuum extending over hundreds of wavenumbers, becoming broader and more blueshifted as the rare gas atom is changed from He to Ne to Ar. In the case of Ne-Br2, the threshold for producing the asymptotic product state reveals the X-state linear isomer bond energy to be 71+/-3 cm(-1). The qualitative agreement between experiment and theory shows that the spectra can be correctly regarded as revealing the one-atom solvent shifts and also provides new insight into the one-atom cage effect on the halogen vibrational relaxation. The measured spectra provide data to test future ab initio potential energy surfaces in the interaction of rare gas atoms with the halogen valence excited state.

Photoionization study of Ne-like K9+, Ca10+, Sc11+, Ti12+, V13+, Cr14+, Mn15+, and Fe16+ ions using the screening constant by unit nuclear charge method

International Nuclear Information System (INIS)

Goyal, Arun; Khatri, Indu; Sow, Malick; Sakho, Ibrahima; Aggarwal, Sunny; Singh, A.K.; Mohan, Man

2016-01-01

Photoionization of the 2s 2 2p 6 ( 1 S 0 ) ground state of the Ne-like (Z=19–29) ions is presented in this paper. Resonance energies and total natural width of the 2s2p 6 np 1 P series of the Ne-like K 9+ , Ca 10+ , Sc 11+ , Ti 12+ , V 13+ , Cr 14+ , Mn 15+ , and Fe 16+ are reported. All the calculations are made using the Screening constant by unit nuclear charge (SCUNC) formalism. New data for Ne-like K 9+ , Sc 11+ , Ti 12+ , V 13+ , Cr 14+ , and Mn 15+ ions are tabulated. Good agreements are found with available literature data. - Highlights: • Photoionization of ground state of the Ne-like (Z=19–29) presented. • good agreements with scarce literature data. • New data for Ne-like K 9+ , Sc 11+ , Ti 12+ , V 13+ , Cr 14+ , and Mn 15+ ions. • Useful guidelines for application in laboratory, astrophysics, and plasma physics.

Phase transition and angular momentum dependence of correlations in the rotational spectra of Ne20 and Ne22

International Nuclear Information System (INIS)

Satpathy, L.; Schmid, K.W.; Krewald, S.; Faessler, A.

1974-01-01

Multi-Configuration-Hartree-Fock (MCHF) calculations with angular momentum projection before the variation of the internal degree of freedom have been performed for the nuclei Ne 20 and Ne 22 . This procedure yields different correlated intrinsic states for the different members of a rotational band. Thus, the angular momentum dependence of correlations has been studied. Experimentally, the ground state spectra of Ne 20 and Ne 22 show properties similar to the phase transitions observed in some rare earth nuclei which have been well reproduced through the present calculations. The calculated spectra show a significant improvement compared to the ones obtained by variation before the angular momentum projection is effected. (author)

Multichannel analysis of He*(21S)+Ne elastic and inelastic scattering in crossed atomic beams

International Nuclear Information System (INIS)

Martin, D.W.; Fukuyama, T.; Siska, P.E.

1990-01-01

State-to-state elastic and inelastic angular distribution and time-of-flight measurements are reported for the scattering of He*(2 1 S) by Ne in crossed supersonic atom beams at four collision energies in the range 0.6--2.8 kcal/mol. The inelastic collision products He+Ne*(nl), where nl=3d', 4p, 4p', 5s, 5s', and 4d, are scattered predominantly forward with respect to the direction of incidence, except for endothermic states near threshold. The data are analyzed with a numerically exact multichannel curve-crossing model that yields good agreement with experimental cross section branching fractions and total quenching and state-to-state rate constants as well as the angular measurements. The model suggests the importance of intermediate ''chaperone'' states, in which the excited electron is temporarily trapped in a d or f Rydberg Ne orbital, in channeling flux into the 4s' and 5s' upper laser states of Ne by energy transfer from He*(2s 1,3 S)

Experimental measurements of the 15O(alpha,gamma)19Ne reaction rate and the stability of thermonuclear burning on accreting neutron stars

International Nuclear Information System (INIS)

Fisker, J; Tan, W; Goerres, J; Wiescher, M; Cooper, R

2007-01-01

Neutron stars in close binary star systems often accrete matter from their companion stars. Thermonuclear ignition of the accreted material in the atmosphere of the neutron star leads to a thermonuclear explosion which is observed as an X-ray burst occurring periodically between hours and days depending on the accretion rate. The ignition conditions are characterized by a sensitive interplay between the accretion rate of the fuel supply and its depletion rate by nuclear burning in the hot CNO cycle and the rp-process. For accretion rates close to stable burning the burst ignition therefore depends critically on the hot CNO breakout reaction 15 O(α, γ) 19 Ne that regulates the flow between the hot CNO cycle and the rapid proton capture process. Until recently, the 15 O(α, γ) 19 Ne reaction rate was not known experimentally and the theoretical estimates carried significant uncertainties. In this paper we perform a parameter study of the uncertainty of this reaction rate and determine the astrophysical consequences of the first measurement of this reaction rate. Our results corroborate earlier predictions and show that theoretically burning remains unstable up to accretion rates near the Eddington limit, in contrast to astronomical observations

One-neutron knockout from Ne24-28 isotopes

CERN Document Server

Rodriguez-Tajes, C; Caamano, M; Faestermann, T; Cortina-Gil, D; Zhukov, M; Simon, H; Nilsson, T; Borge, M J G; Alvarez-Pol, H; Winkler, M; Prochazka, A; Nociforo, C; Weick, H; Kanungo, R; Perez-Loureiro, D; Kurtukian, T; Suemmerer, K; Eppinger, K; Perea, A; Chatillon, A; Maierbeck, P; Benlliure, J; Pascual-Izarra, C; Gernhaeuser, R; Geissel, H; Aumann, T; Kruecken, R; Larsson, K; Tengblad, O; Benjamim, E; Jonson, B; Casarejos, E

2010-01-01

One-neutron knockout reactions of Ne24-28 in a beryllium target have been studied in the Fragment Separator (FRS), at GSI. The results include inclusive one-neutron knockout cross-sections as well as longitudinal-momentum distributions of the knockout fragments. The ground-state structure of the neutron-rich neon isotopes was obtained from an analysis of the measured momentum distributions. The results indicate that the two heaviest isotopes, Ne-27 and Ne-28, are dominated by a configuration in which a s(1/2) neutron is coupled to an excited state of the Ne-26 and Ne-27 core, respectively. (C) 2010 Elsevier B.V. All rights reserved.

Cu 4s → 4p atomic like excitations in the Ne matrix.

Science.gov (United States)

Hatano, Yasuyo; Tatewaki, Hiroshi; Yamamoto, Shigeyoshi

2013-06-07

The lowest three or four excited states (the triplet or quartet states) of the Cu atom in a neon (Ne) matrix have been studied experimentally, and have been presumed to have the electronic configuration of Cu 4p(1). The origins of the triplet and the quartet are not yet fully clear, although many models have been proposed. It has been argued, for example, that the existence of different trapping sites would give rise to two partly overlapping triplets, leading to spectra having three or four lines or more. Below, the electronic structures of the ground state and lowest excited states of the Cu atom in the neon matrix are clarified by means of ab initio molecular orbital calculations, using the cluster model. It was found that a rather large vacancy (hollow) with residual Ne atoms is vital for explaining the observed spectra having three or more lines; the Cu atom occupies the center of the substitutional site of a face-centered cubic (fcc)-like cluster comprising 66 Ne atoms, in which the first shell composed of 12 Ne atoms is empty. The presence of the residual Ne atoms in the first shell gives rise to more than three excited states, explaining the experimental spectra. Electron-electron interaction (including the crystal field) and spin-orbit interaction are both important in explaining the experimental spectra.

Spectroscopy of {sup 18}Na: Bridging the two-proton radioactivity of {sup 19}Mg

Energy Technology Data Exchange (ETDEWEB)

Assie, M. [GANIL, CEA/DSM-CNRS/IN2P3, Caen (France); Institut de Physique Nucleaire, Universite Paris-Sud-11-CNRS/IN2P3, 91406 Orsay (France); Oliveira Santos, F. de, E-mail: oliveira@ganil.fr [GANIL, CEA/DSM-CNRS/IN2P3, Caen (France); Davinson, T. [SUPA School of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom); Grancey, F. de [GANIL, CEA/DSM-CNRS/IN2P3, Caen (France); Achouri, L. [LPC/ENSICAEN, Blvd du Marechal Juin, 14050 Caen Cedex (France); Alcantara-Nunez, J. [Departamento de Fisica de Particulas, Universidade de Santiago de Compostela, E15782 (Spain); Al Kalanee, T.; Angelique, J.-C. [LPC/ENSICAEN, Blvd du Marechal Juin, 14050 Caen Cedex (France); Borcea, C.; Borcea, R. [Horia Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 76900 Bucharest (Romania); Caceres, L. [GANIL, CEA/DSM-CNRS/IN2P3, Caen (France); Celikovic, I. [VINCA Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade (Serbia); Chudoba, V. [Flerov Laboratory of Nuclear Reactions, JINR RU-141980 Dubna (Russian Federation); Institute of Physics, Silesian University in Opava, Bezrucovo nam. 13, 746 01 Opava (Czech Republic); Pang, D.Y. [GANIL, CEA/DSM-CNRS/IN2P3, Caen (France); Ducoin, C. [INFN - Sezione di Catania, Via S. Sofia 64, Catania 95123 (Italy); Fallot, M. [Subatech 4 rue Alfred Kastler, BP 20722, F-44307 Nantes Cedex 3 (France); Kamalou, O. [GANIL, CEA/DSM-CNRS/IN2P3, Caen (France); Kiener, J. [CSNSM, Universite Paris-Sud-11, CNRS/IN2P3, 91405 Orsay-Campus (France); Lam, Y. [CENBG CNRS/IN2P3 - Universite Bordeaux 1, Le Haut Vigneau, 33175 Gradignan cedex (France); and others

2012-06-06

The unbound nucleus {sup 18}Na, the intermediate nucleus in the two-proton radioactivity of {sup 19}Mg, was studied by the measurement of the resonant elastic scattering reaction H({sup 17}Ne,p){sup 17}Ne performed at 4 A.MeV using a radioactive beam from the SPIRAL Facility. Spectroscopic properties of the low-lying states were obtained in an R-matrix analysis of the excitation function.

19 CFR 210.19 - Intervention.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Intervention. 210.19 Section 210.19 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Motions § 210.19 Intervention. Any person desiring to intervene in an...

Study of some excited states in 21Ne-21Na, 18O-18F and 15N-15O nuclei

International Nuclear Information System (INIS)

Drain, D.

1977-01-01

The study of 21 Ne- 21 Na, 18 O- 18 F and 15 N- 15 O nuclei was performed through proton capture and transfer reactions and allows to determine the spins and parities of some excited states, give the gamma deexcitation schemes of these levels, compute the neutron and proton reduced width γ 2 sub(n) and γ 2 sub(p). The levels studied are: in 21 Na 4.15 20 Ne(p,p), (p,p'), (p,p'γ) and (pγ) reactions) and in 21 Ne: E(exc)=4.73, 5.69 and 5.78 MeV ( 20 Ne (p,p) reaction); in 18 O: E(exc) 17 O(d,p) reaction); in 15 O: 8.92 MeV doublet and 8.98 MeV level (angular correlation 14 N(p,γγ) and in 15 N: 9.05 14 N(d,p) reaction). A comparison with theoretical results is discussed and analog states are pointed out [fr

One-neutron knockout from {sup 24-28}Ne isotopes

Energy Technology Data Exchange (ETDEWEB)

Rodriguez-Tajes, C., E-mail: carme.rodriguez@usc.e [Departamento de Fisica de Particulas, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain); Cortina-Gil, D.; Alvarez-Pol, H. [Departamento de Fisica de Particulas, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain); Aumann, T. [GSI Helmholtzzentrum fuer Schwerionenforschung, 64291 Darmstadt (Germany); Benjamim, E.; Benlliure, J. [Departamento de Fisica de Particulas, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain); Borge, M.J.G. [Instituto de Estructura de la Materia, CSIC, 28006 Madrid (Spain); Caamano, M.; Casarejos, E. [Departamento de Fisica de Particulas, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain); Chatillon, A. [GSI Helmholtzzentrum fuer Schwerionenforschung, 64291 Darmstadt (Germany); Eppinger, K.; Faestermann, T. [Physik Department E12, Technische Universitaet Muenchen, 85748 Garching (Germany); Gascon, M. [Departamento de Fisica de Particulas, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain); Geissel, H. [GSI Helmholtzzentrum fuer Schwerionenforschung, 64291 Darmstadt (Germany); Gernhaeuser, R. [Physik Department E12, Technische Universitaet Muenchen, 85748 Garching (Germany); Jonson, B. [Fundamental Fysik, Chalmers Tekniska Hoegskola, 412 96 Goeteborg (Sweden); PH Department, CERN, 1211 Geneve 23 (Switzerland); Kanungo, R. [Astronomy and Physics Department, Saint Mary' s University, Halifax, NS B3H 3C3 (Canada); Kruecken, R. [Physik Department E12, Technische Universitaet Muenchen, 85748 Garching (Germany); Kurtukian, T. [Departamento de Fisica de Particulas, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain); Larsson, K. [Fundamental Fysik, Chalmers Tekniska Hoegskola, 412 96 Goeteborg (Sweden)

2010-04-05

One-neutron knockout reactions of {sup 24-28}Ne in a beryllium target have been studied in the Fragment Separator (FRS), at GSI. The results include inclusive one-neutron knockout cross-sections as well as longitudinal-momentum distributions of the knockout fragments. The ground-state structure of the neutron-rich neon isotopes was obtained from an analysis of the measured momentum distributions. The results indicate that the two heaviest isotopes, {sup 27}Ne and {sup 28}Ne, are dominated by a configuration in which a s{sub 1/2} neutron is coupled to an excited state of the {sup 26}Ne and {sup 27}Ne core, respectively.

19 CFR 10.175 - Imported directly defined.

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2010-04-01

... imported directly only if they: (1) Remained under the control of the customs authority of the intermediate... 19 Customs Duties 1 2010-04-01 2010-04-01 false Imported directly defined. 10.175 Section 10.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE...

19 CFR 10.846 - Imported directly.

Science.gov (United States)

2010-04-01

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19 CFR 10.204 - Imported directly.

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2010-04-01

... customs authority in the intermediate country; (2) Did not enter into the commerce of the intermediate... 19 Customs Duties 1 2010-04-01 2010-04-01 false Imported directly. 10.204 Section 10.204 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY...

19 CFR 12.97 - Importations contrary to law.

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2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Importations contrary to law. 12.97 Section 12.97... TREASURY SPECIAL CLASSES OF MERCHANDISE Switchblade Knives § 12.97 Importations contrary to law. Importations of switchblade knives, except as permitted by 15 U.S.C. 1244, are importations contrary to law and...

19 CFR 10.193 - Imported directly.

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2010-04-01

... control of the customs authority of the intermediate country; (2) Did not enter into the commerce of the... 19 Customs Duties 1 2010-04-01 2010-04-01 false Imported directly. 10.193 Section 10.193 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY...

Calculation of the ground and excited states of the Ne2 molecule by the variational cellular method

International Nuclear Information System (INIS)

Dias, A.M.; Rosato, A.

1981-07-01

The potential curves for the ground state 1 Σ + sub(g) and for the first singlet excited state 1 Σ + sub (u) of the Ne 2 molecule are determined by the Variational Cellular Method. From these curves some spectroscopical constants are obtained. Ionization energies of the excited state 1 Σ + sub (u) are calculated. (Author) [pt

Measurement of Reconstructed Charged Particle Multiplicities of Neutrino Interactions in MicroBooNE

Energy Technology Data Exchange (ETDEWEB)

Rafique, Aleena [Kansas State Univ., Manhattan, KS (United States)

2017-09-25

Here, we compare the observed charged particle multiplicity distributions in the MicroBooNE liquid argon time projection chamber from neutrino interactions in a restricted final state phase space to predictions of this distribution from several GENIE models. The measurement uses a data sample consisting of neutrino interactions with a final state muon candidate fully contained within the MicroBooNE detector. These data were collected in 2015-2016 with the Fermilab Booster Neutrino Beam (BNB), which has an average neutrino energy of 800 MeV, using an exposure corresponding to 5e19 protons-on-target. The analysis employs fully automatic event selection and charged particle track reconstruction and uses a data-driven technique to determine the contribution to each multiplicity bin from neutrino interactions and cosmic-induced backgrounds. The restricted phase space employed makes the measurement most sensitive to the higher-energy charged particles expected from primary neutrino-argon collisions and less sensitive to lower energy protons expected to be produced in final state interactions of collision products with the target argon nucleus.

Sterile Neutrino Searches in MiniBooNE and MicroBooNE

Energy Technology Data Exchange (ETDEWEB)

Ignarra, Christina M. [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

2014-09-01

Tension among recent short baseline neutrino experiments has pointed toward the possible need for the addition of one or more sterile (non-interacting) neutrino states into the existing neutrino oscillation framework. This thesis first presents the motivation for sterile neutrino models by describing the short-baseline anomalies that can be addressed with them. This is followed by a discussion of the phenomenology of these models. The MiniBooNE experiment and results are then described in detail, particularly the most recent antineutrino analysis. This will be followed by a discussion of global fits to world data, including the anomalous data sets. Lastly, future experiments will be addressed, especially focusing on the MicroBooNE experiment and light collection studies. In particular, understanding the degradation source of TPB, designing the TPB-coated plates for MicroBooNE and developing lightguide collection systems will be discussed. We find an excess of events in the MiniBooNE antineutrino mode results consistent with the LSND anomaly, but one that has a different energy dependence than the low-energy excess reported in neutrino mode. This disagreement creates tension within global fits which include up to three sterile neutrinos. The low-energy excess will be addressed by the MicroBooNE experiment, which is expected to start taking data in early 2015. Tension among existing experiments calls for additional, more decisive future experiments.

Sterile Neutrino Searches in MiniBooNE and MicroBooNE

Energy Technology Data Exchange (ETDEWEB)

Ignarra, Christina M. [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

2014-09-01

Tension among recent short baseline neutrino experiments has pointed toward the possible need for the addition of one or more sterile (non-interacting) neutrino states into the existing neutrino oscillation framework. This thesis fi rst presents the motivation for sterile neutrino models by describing the short-baseline anomalies that can be addressed with them. This is followed by a discussion of the phenomenology of these models. The MiniBooNE experiment and results are then described in detail, particularly the most recent antineutrino analysis. This will be followed by a discussion of global fits to world data, including the anomalous data sets. Lastly, future experiments will be addressed, especially focusing on the MicroBooNE experiment and light collection studies. In particular, understanding the degradation source of TPB, designing the TPB-coated plates for MicroBooNE and developing lightguide collection systems will be discussed. We find an excess of events in the MiniBooNE antineutrino mode results consistent with the LSND anomaly, but one that has a di fferent energy dependence than the low-energy excess reported in neutrino mode. This disagreement creates tension within global fi ts which include up to three sterile neutrinos. The low-energy excess will be addressed by the MicroBooNE experiment, which is expected to start taking data in early 2015. Tension among existing experiments calls for additional, more decisive future experiments.

Re-examining the 26Mg(α ,α')26Mg reaction: Probing astrophysically important states in 26Mg

Science.gov (United States)

Adsley, P.; Brümmer, J. W.; Li, K. C. W.; Marín-Lámbarri, D. J.; Kheswa, N. Y.; Donaldson, L. M.; Neveling, R.; Papka, P.; Pellegri, L.; Pesudo, V.; Pool, L. C.; Smit, F. D.; van Zyl, J. J.

2017-11-01

Background: The 22Ne(α ,n )25Mg reaction is one of the neutron sources for the s process in massive stars. The properties of levels in 26Mg above the α -particle threshold control the strengths of the 22Ne(α ,n )25Mg and 22Ne(α ,γ )26Mg reactions. The strengths of these reactions as functions of temperature are one of the major uncertainties in the s process. Purpose: Information on the existence, spin, and parity of levels in 26Mg can assist in constraining the strengths of the 22Ne(α ,γ )26Mg and 22Ne(α ,n )25Mg reactions, and therefore in constraining s -process abundances. Methods: Inelastically scattered α particles from a 26Mg target were momentum-analyzed in the K600 magnetic spectrometer at iThemba LABS, South Africa. The differential cross sections of states were deduced from the focal-plane trajectory of the scattered α particles. Based on the differential cross sections, spin and parity assignments to states are made. Results: A newly assigned 0+ state was observed in addition to a number of other states, some of which can be associated with states observed in other experiments. Some of the deduced Jπ values of the states observed in the present study show discrepancies with those assigned in a similar experiment performed at RCNP Osaka. The reassignments and additions of the various states can strongly affect the reaction rate at low temperatures. Conclusion: The number, location, and assignment of levels in 26Mg that may contribute to the 22Ne+α reactions are not clear. Future experimental investigations of 26Mg must have an extremely good energy resolution to separate the contributions from different levels. Coincidence experiments of 26Mg provide a possible route for future investigations.

Alpha-chain states in 4N-nuclei from 20Ne to 32S

International Nuclear Information System (INIS)

Merchant, A.C.; Rae, W.D.M.

1992-01-01

A 6α-chain state has recently been discovered in 24 Mg which is some 16--17 MeV above the 6α-breakup threshold and yet paradoxically only 4--5 MeV wide. This surprising discovery raises the question of the possible existence of Nα-chain states in other 4N-nuclei. The excitation energy of this 6α-chain state is very close to the value predicted by the Bloch-Brink cluster model. Therefore, to aid the experimental search for similar states in other nuclei, we present here predictions of the excitation energies of the Nα-chain state bandheads in the 4N-nuclei from 20 Ne to 32 S obtained using the Bloch-Brink cranked cluster model with the Brink-Boeker effective interaction and free variation of all parameters

Charge-state correlated cross sections for the production of low-velocity highly charged Ne ions by heavy-ion bombardment

International Nuclear Information System (INIS)

Gray, T.J.; Cocke, C.L.; Justiniano, E.

1980-01-01

We report measured cross sections for the collisional production of highly charged low-velocity Ne recoil ions resulting from the bombardment of a thin Ne gas target by highly charged 1-MeV/amu C, N, O, and F projectiles. The measurements were made using time-of-flight techniques which allowed the simultaneous identification of the final charge state of both the low-velocity recoil ion and the high-velocity projectile for each collision event. For a given incident-projectile charge state, the recoil charge-state distribution is very dependent upon the final charge state of the projectile. Single- and double-electron capture events by incident bare nuclei and projectile K-shell ionization during the collision cause large shifts in the recoil charge-state distributions toward higher charge states. A previously proposed energy-deposition model is modified to include the effects of projectile charge-changing collisions during the collision for bare and hydrogenlike projectiles and is used to discuss the present experimental results

Calculation of the ground and excited states of the Ne2 molecule by the Variational Cellular Method

International Nuclear Information System (INIS)

Dias, A.M.; Rosato, A.

1982-01-01

The potential curves for the ground 1 μ + sub(g) and for the first singlet excited state 1 μ + sub(u) of the Ne 2 molecule are determined by the Variational Cellular Method. From these curves some spectroscopical constants are obtained. Ionization energies of the excited state 1 μ + sub(u) are calculated. (Author) [pt

19 CFR 191.173 - Imported duty-paid derivatives (no manufacture).

Science.gov (United States)

2010-04-01

... 19 Customs Duties 2 2010-04-01 2010-04-01 false Imported duty-paid derivatives (no manufacture). 191.173 Section 191.173 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND... § 191.173 Imported duty-paid derivatives (no manufacture). When the basis for drawback under 19 U.S.C...

Quantum dynamics of Ne-Br2 vibrational predissociation: the role of continuum resonances as doorway states.

Science.gov (United States)

García-Vela, A; Janda, K C

2006-01-21

Wave-packet simulations of the Ne-Br2(B,upsilon') vibrational predissociation dynamics in the range upsilon' = 16-29 are reported. The aim is to interpret recent time-dependent pump-probe experiments [Cabrera et al., J. Chem. Phys. 123, 054311 (2005)]. Good agreement is found between the calculated and the experimental lifetimes corresponding to decay of the Ne-Br2(B,upsilon') initial state and to appearance of Br2(B,upsilonBr2(B,upsilonBr2(B,upsilonBr2 distances greater than 15 angstroms. In the light of the results, a structure of the spectrum of continuum resonances is suggested and discussed.

Measurement of the {sup 15}O(2p,{gamma}){sup 17}Ne cross section by Coulomb dissociation of {sup 17}Ne

Energy Technology Data Exchange (ETDEWEB)

Marganiec, Justyna [ExtreMe Matter Institute EMMI, GSI Darmstadt, Darmstadt (Germany); Aumann, Thomas; Heil, Michael; Plag, Ralf; Wamers, Felix [Kernreaktionen und Nuklear Astrophysik, GSI Darmstadt, Darmstadt (Germany)

2010-07-01

For the production of proton-rich nuclei during the rp process two-proton capture plays an important role. This process can bridge long-lived waiting points which otherwise hamper the mass flow between CNO material and the FeNi mass region. One of these waiting points is {sup 15}O. The three-body radiative capture can proceed sequentially or directly from the three-body continuum. The rate of the {sup 15}O(2p,{gamma}){sup 17}Ne reaction obtained using the two-successive-proton-capture model has been discussed in J. Goerres et al. (Phys. Rev. C 51, 392, 1995). The role of continuum states ({sup 15}O+2p) for the rate calculation has been demonstrated in L.V Grigorenko, M.V. Zhukov (Phys. Rev. C 72, 015803, 2005). It has been suggested that the reaction rate can be enhanced by a few orders of magnitude by taking into account the three-body continuum. In order to verify these calculations, we have deduced the {sup 15}O(2p,{gamma}){sup 17}Ne cross section by studying the time-reversed process, the Coulomb dissociation of {sup 17}Ne, at the LAND/R{sup 3}B setup at GSI, using a {sup 17}Ne secondary beam from the fragment separator FRS.

Photoionization of Ne8+

Science.gov (United States)

Pindzola, M. S.; Abdel-Naby, Sh. A.; Robicheaux, F.; Colgan, J.

2014-05-01

Single and double photoionization cross sections for Ne8+ are calculated using a non-perturbative fully relativistic time-dependent close-coupling method. A Bessel function expansion is used to include both dipole and quadrupole effects in the radiation field interaction and the repulsive interaction between electrons includes both the Coulomb and Gaunt interactions. The fully correlated ground state of Ne8+ is obtained by solving a time-independent inhomogeneous set of close-coupled equations. Propagation of the time-dependent close-coupled equations yields single and double photoionization cross sections for Ne8+ at energies easily accessible at advanced free electron laser facilities. This work was supported in part by grants from NSF and US DoE. Computational work was carried out at NERSC in Oakland, California, NICS in Knoxville, Tennessee, and OLCF in Oak Ridge, Tennessee.

The NeXus data format.

Science.gov (United States)

Könnecke, Mark; Akeroyd, Frederick A; Bernstein, Herbert J; Brewster, Aaron S; Campbell, Stuart I; Clausen, Björn; Cottrell, Stephen; Hoffmann, Jens Uwe; Jemian, Pete R; Männicke, David; Osborn, Raymond; Peterson, Peter F; Richter, Tobias; Suzuki, Jiro; Watts, Benjamin; Wintersberger, Eugen; Wuttke, Joachim

2015-02-01

NeXus is an effort by an international group of scientists to define a common data exchange and archival format for neutron, X-ray and muon experiments. NeXus is built on top of the scientific data format HDF5 and adds domain-specific rules for organizing data within HDF5 files, in addition to a dictionary of well defined domain-specific field names. The NeXus data format has two purposes. First, it defines a format that can serve as a container for all relevant data associated with a beamline. This is a very important use case. Second, it defines standards in the form of application definitions for the exchange of data between applications. NeXus provides structures for raw experimental data as well as for processed data.

Stellar reaction rate for 22Mg+p→23Al from the asymptotic normalization coefficient in the mirror nuclear system 22Ne+n→23Ne

International Nuclear Information System (INIS)

Al-Abdullah, T.; Carstoiu, F.; Chen, X.; Clark, H. L.; Fu, C.; Gagliardi, C. A.; Lui, Y.-W.; Mukhamedzhanov, A.; Tabacaru, G.; Tokimoto, Y.; Trache, L.; Tribble, R. E.

2010-01-01

The production of 22 Na in ONe novae can be influenced by the 22 Mg(p,γ) 23 Al reaction. To investigate this reaction rate at stellar energies, we have determined the asymptotic normalization coefficient (ANC) for 22 Mg+p→ 23 Al through measurements of the ANCs in the mirror nuclear system 22 Ne+n→ 23 Ne. The peripheral neutron-transfer reactions 13 C( 12 C, 13 C) 12 C and 13 C( 22 Ne, 23 Ne) 12 C were studied. The identical entrance and exit channels of the first reaction make it possible to extract independently the ground-state ANC in 13 C. Our experiment gives C p 1/2 2 ( 13 C)=2.24±0.11 fm -1 , which agrees with the value obtained from several previous measurements. The weighted average for all the obtained C p 1/2 2 is 2.31±0.08 fm -1 . This value is adopted to be used in obtaining the ANCs in 23 Ne. The differential cross sections for the reaction 13 C( 22 Ne, 23 Ne) 12 C leading to the J π =5/2 + and 1/2 + states in 23 Ne have been measured at 12 MeV/u. Optical model parameters for use in the DWBA calculations were obtained from measurements of the elastic scatterings 22 Ne+ 13 C and 22 Ne+ 12 C. The extracted ANC for the ground state in 23 Ne, C d 5/2 2 =0.86±0.08±0.12 fm -1 , is converted to its corresponding value in 23 Al using mirror symmetry to give C d 5/2 2 ( 23 Al)=(4.63±0.77)x10 3 fm -1 . The astrophysical S factor S(0) for the 22 Mg(p,γ) reaction was determined to be 0.96±0.11 keV b. The consequences for nuclear astrophysics are discussed.

Investigation of the alpha cluster states in 22Ne through the transfer induced breakup reaction 12C (18O, 18O + α)8Be at E(18O) 94.5 MeV

International Nuclear Information System (INIS)

Adhikari, S.; Basu, C.; Mitra, A.K.; Behera, B.R.; Ray, S.; Kumar, Suresh; Chatterjee, A.

2008-01-01

The nucleus 22 Ne like 18 O and 20 Ne has been sparsely investigated experimentally for an 18 O + α cluster structure. Only one experiment has reported the 22 Ne alpha cluster states using the same reaction but a much higher energy. One other experiment also reported the states with a different target and the results of these experiments are different. Therefore the 22 Ne structure has been analyzed in this work

Human Parvovirus B19

OpenAIRE

Yarkın, Fügen

1992-01-01

Human parvavirus B19'un morfolojisi, oluşturduğu enfeksiyonun klinik belirtileri,tanı yöntemleri, epidemik özellikleri göz önüne alındığında, özellikle kronik olgularda B19 antikorlarının ilave edildiği immünglobulinlerin intravenöz infüzyonunun tedavide etkili olabilmektedir.

Metastable He (n=2) - Ne potential interaction calculation

International Nuclear Information System (INIS)

Rahal, H.

1983-10-01

Diabatic potential terms corresponding to He (2 1 S)-Ne and He (2 3 S)-Ne interactions are calculated. These potentials reproduce the experimental results thermal metastable atom elastic scattering on Ne target. A model which reduces the interaction to a one-electron problem is proposed: the He excited electron. Its interaction with the He + center is reproduced by a ''l'' dependent potential model with a 1/2 behaviour at short range. The electron interaction facing the Ne is described by a l-dependent pseudopotential reproducing with accuracy the electron elastic scattering on a Ne atom. The importance of the corrective term related to the Ne polarizations by the electron and the He + ion is showed in this work. In the modelling problems, the accuracy cannot be better than 0.1 MeV [fr

19 CFR 141.1 - Liability of importer for duties.

Science.gov (United States)

2010-04-01

... Customs by the broker. (c) Claim against estate of importer. The claim of the Government for unpaid duties... 19 Customs Duties 2 2010-04-01 2010-04-01 false Liability of importer for duties. 141.1 Section 141.1 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT...

"Ne kreshtshenogo, ne otpetogo..." : [luuletused] / Marina Petrova

Index Scriptorium Estoniae

Petrova, Marina

2001-01-01

Sisu: "Ne kreshtshenogo, ne otpetogo..." ; "Inogo mesta vstretshi v mire net..." ; "Moi put lezhit tsherez Moskvu..." ; "Osvoboditelnaja ossen - ..." ; Pjuhtitskim aistam ; "Vesjolõje svetshi kanona..." ; Vjuga ; Materi Bozhijei Pjuhtitskoi ; "Pustõnja moja, pustõnja..." ; "Odinnadtsat let v mojo serdtse gljadjat kupola..."

Exclusive measurements of nuclear breakup reactions of 17Ne

International Nuclear Information System (INIS)

Wamers, F.; Marganiec, J.; Aksouh, F.; Aksyutina, Y.; Boretzky, K.; Chatillon, A.; Emling, H.; Geissel, H.; Heil, M.; Hoffmann, J.; Karagiannis, C.; Kiselev, O.A.; Kurz, N.; Larsson, K.; Litvinov, Y.A.; Nociforo, C.; Ott, W.; Simon, H.; Suemmerer, K.; Weick, H.; Alvarez-Pol, H.; Beceiro-Novo, S.; Cortina-Gil, D.; Rodriguez-Tajes, C.; Aumann, T.; Panin, V.; Bertulani, C.A.; Borge, M.J.G.; Galaviz, D.; Perea, A.; Tengblad, O.; Chartier, M.; Taylor, J.; Chulkov, L.V.; Egorova, I.A.; Ershova, O.; Langer, C.; Plag, R.; Reifarth, R.; Wimmer, C.; Forssen, C.; Johansson, H.; Jonson, B.; Nilsson, T.; Nyman, G.; Tengborn, E.; Zhukov, M.V.; Fraile, L.M.; Fynbo, H.; Riisager, K.; Grigorenko, L.V.; Hoffmann, D.H.; Richter, A.; Schrieder, G.; Karakoc, M.; Kratz, J.V.; Kulessa, R.; Lantz, M.; Le Bleis, T.; Lemmon, R.; Mahata, K.; Muentz, C.; Stroth, J.; Parfenova, Y.L.; Paschalis, S.; Rossi, D.; Savran, D.; Shul'gina, N.B.

2014-01-01

We have studied one-proton-removal reactions of about 500 MeV/u 17 Ne beams on a carbon target at the R 3 B/LAND setup at GSI by detecting beam-like 15 O-p and determining their relative-energy distribution. We exclusively selected the removal of a 17 Ne halo proton, and the Glauber-model analysis of the 16 F momentum distribution resulted in an s 2 contribution in the 17 Ne ground state of about 40 %. (authors)

Coulomb and nuclear excitations of narrow resonances in 17Ne

Directory of Open Access Journals (Sweden)

J. Marganiec

2016-08-01

Full Text Available New experimental data for dissociation of relativistic 17Ne projectiles incident on targets of lead, carbon, and polyethylene targets at GSI are presented. Special attention is paid to the excitation and decay of narrow resonant states in 17Ne. Distributions of internal energy in the O15+p+p three-body system have been determined together with angular and partial-energy correlations between the decay products in different energy regions. The analysis was done using existing experimental data on 17Ne and its mirror nucleus 17N. The isobaric multiplet mass equation is used for assignment of observed resonances and their spins and parities. A combination of data from the heavy and light targets yielded cross sections and transition probabilities for the Coulomb excitations of the narrow resonant states. The resulting transition probabilities provide information relevant for a better understanding of the 17Ne structure.

Isotopic effect of the mean lifetimes of the NeAr2+ doubly charged rare-gas dimer

International Nuclear Information System (INIS)

Ben-Itzhak, I.; Bouhnik, J.P.; Chen, Z.; Gertner, I.; Heinemann, C.; Koch, W.; Lin, C.D.; Rosner, B.

1995-01-01

It has been suggested recently by Chen et al. [Phys. Rev. A 49, 3472 (1994)] that the measured long-lived NeAr 2+ formed in fast NeAr + + Ar charge-stripping collisions is mostly in its v=12 vibrational state bound to the electronic ground state, and that this molecular ion decays by tunneling through the potential barrier. Such a decay rate is expected to depend strongly on the reduced mass of the molecular ion leading to large isotopic effects. We have measured the mean lifetimes of the 20 Ne 40 Ar 2+ and 22 Ne 40 Ar 2+ isotopes in order to see this isotopic effect. Surprisingly, the mean lifetimes of both isotopes are similar to each other. Thus, it is suggested that the observed NeAr 2+ molecular ions do not decay via a tunneling mechanism, which would indicate that they reside in the metastable electronic ground state. Rather, electronic transitions from bound or metastable excited states into other repulsive states are the origin for the experimentally observed decay. Qualitative estimates for the shapes and ordering of these states in the electronic spectrum of NeAr 2+ are given

Excitation of the giant quadrupole resonance in /sup 58/Ni with /sup 20/Ne

CERN Document Server

Bohlen, H G; Ingold, G; Lettau, H; Ossenbrink, H; von Oertzen, W

1981-01-01

The heavy-ion induced excitation of the quadrupole resonance in /sup 58/Ni has been studied with /sup 20/Ne beams of 14.5 and 19.6 MeV/N incident energy. The broad resonance structure is clearly observed; the strength exhausts 44% and 60% of the energy weighted sum rule (EWSR) at the two incident energies, respectively. The background is partly explained by a three-body reaction mechanism, which is based on the one-nucleon pick-up reaction into unbound states followed by one- nucleon emission. The remaining part is interpreted as inelastic excitation of other multipoles. (11 refs).

NeXML: rich, extensible, and verifiable representation of comparative data and metadata.

Science.gov (United States)

Vos, Rutger A; Balhoff, James P; Caravas, Jason A; Holder, Mark T; Lapp, Hilmar; Maddison, Wayne P; Midford, Peter E; Priyam, Anurag; Sukumaran, Jeet; Xia, Xuhua; Stoltzfus, Arlin

2012-07-01

In scientific research, integration and synthesis require a common understanding of where data come from, how much they can be trusted, and what they may be used for. To make such an understanding computer-accessible requires standards for exchanging richly annotated data. The challenges of conveying reusable data are particularly acute in regard to evolutionary comparative analysis, which comprises an ever-expanding list of data types, methods, research aims, and subdisciplines. To facilitate interoperability in evolutionary comparative analysis, we present NeXML, an XML standard (inspired by the current standard, NEXUS) that supports exchange of richly annotated comparative data. NeXML defines syntax for operational taxonomic units, character-state matrices, and phylogenetic trees and networks. Documents can be validated unambiguously. Importantly, any data element can be annotated, to an arbitrary degree of richness, using a system that is both flexible and rigorous. We describe how the use of NeXML by the TreeBASE and Phenoscape projects satisfies user needs that cannot be satisfied with other available file formats. By relying on XML Schema Definition, the design of NeXML facilitates the development and deployment of software for processing, transforming, and querying documents. The adoption of NeXML for practical use is facilitated by the availability of (1) an online manual with code samples and a reference to all defined elements and attributes, (2) programming toolkits in most of the languages used commonly in evolutionary informatics, and (3) input-output support in several widely used software applications. An active, open, community-based development process enables future revision and expansion of NeXML.

The variational cellular method for quantum mechanical applications : calculations of the ground and excited states of F2 and Ne2 molecules

International Nuclear Information System (INIS)

Leite, J.R.; Fazzio, A.; Lima, M.A.P.; Dias, A.M.; Rosato, A.; Segre, E.R.A.

1980-12-01

A self-consistent calculation based on the Variational Cellular Method is performed on the F 2 and Ne 2 molecules. The potential curve for the group state and for excited states of these molecules are determined. Spectroscopic constants related to the potential curves are also obtained. (Author) [pt

DSA lifetime measurements in 21Ne at high recoil velocity

International Nuclear Information System (INIS)

Grawe, H.; Heidinger, F.; Kaendler, K.

1977-01-01

States in 21 Ne up to 5 MeV excitation energy have been populated using the inverted reaction 2 H( 20 Ne,pγ). The Doppler shift attenuation (DSA) analysis of the pγ coincidence spectra taken in a Ge(Li) detector at 45 0 and 135 0 and an annular silicon surface barrier detector near 0 0 yielded the lifetimes of 8 states in 21 Ne. Due to the large recoil of vi/c approximately equal to 4% three new lifetimes were determined for the short lived levels at 2.80, 4.68 and 4.73 MeV, namely 10 +- 4 fs, 16 +- 4 fs and 10 +- 4 fs, respectively. The results are compared with rotational and shell model calculations. (orig.) [de

Radiative and nonradiative lifetimes in excited states of Ar, Kr and Xe atoms in Ne matrix

International Nuclear Information System (INIS)

Hahn, U.; Schwentner, N.

1979-10-01

Synchrotron radiation with its intense continuum and its excellent time structure has been exploited for time resolved luminescence spectroscopy in the solid state. By selective excitation of n = 1, n' = 1 and n = 2 exciton states of Xe, Kr and Ar atoms in Ne matrix we were able to identify the emitting states involved. Lifetimes within the cascade of radiative and radiationless relaxation between excited states as well as the radiative lifetimes for transitions to the ground state have been derived from the decay curves. Energy positions and radiative lifetimes of the emitting states correspond quite well with those of the free atoms. Radiative and radiationless relaxation processes take place within the manifold of excited states of the guest atoms. The rate constants for radiationless decay confirm an energy gap law. The order of the radiationless processes reaches in some cases extremely high values. Selection rules for spin and angular momentum are essential to understand the observed radiationless transition rates. (orig.)

The MicroBooNE Technical Design Report

Energy Technology Data Exchange (ETDEWEB)

Fleming, Bonnie [Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

2012-02-24

MicroBooNE will build, operate, and extract physics from the first large liquid argon time projection chamber (LArTPC) that will be exposed to a high-intensity neutrino beam. With its unparalleled capabilities in tracking, vertexing, calorimetry, and particle identification, all with full electronic readout, MicroBooNE represents a major advance in detector technology for neutrino physics in the energy regime of most importance for elucidating oscillation phenomena.

Constraints on the ^22Ne(α,n)^25Mg reaction rate from ^natMg+n Total and ^25Mg(n,γ ) Cross Sections

Science.gov (United States)

Koehler, Paul

2002-10-01

The ^22Ne(α,n)^25Mg reaction is the neutron source during the s process in massive and intermediate mass stars as well as a secondary neutron source during the s process in low mass stars. Therefore, an accurate determination of this rate is important for a better understanding of the origin of nuclides heavier than iron as well as for improving s-process models. Also, because the s process produces seed nuclides for a later p process in massive stars, an accurate value for this rate is important for a better understanding of the p process. Because the lowest observed resonance in direct ^22Ne(α,n)^25Mg measurements is considerably above the most important energy range for s-process temperatures, the uncertainty in this rate is dominated by the poorly known properties of states in ^26Mg between this resonance and threshold. Neutron measurements can observe these states with much better sensitivity and determine their parameters much more accurately than direct ^22Ne(α,n)^25Mg measurements. I have analyzed previously reported Mg+n total and ^25Mg(n,γ ) cross sections to obtain a much improved set of resonance parameters for states in ^26Mg in this region, and an improved estimate of the uncertainty in the ^22Ne(α,n)^25Mg reaction rate. This work was supported by the U.S. DOE under contract No. DE-AC05-00OR22725 with UT-Battell, LLC.

19 CFR 4.94a - Large yachts imported for sale.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Large yachts imported for sale. 4.94a Section 4.94a Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY VESSELS IN FOREIGN AND DOMESTIC TRADES General § 4.94a Large yachts imported for sale. (a...

Analyses of electron and proton scattering to low excitation isoscalar states in 20Ne, 24Mg and 28Si

International Nuclear Information System (INIS)

Amos, K.; Bauhoff, W.

1983-01-01

Intermediate energy inelastic proton scattering differential cross section and polarization data from the 2 1 + states in 24 Mg and 28 Si and from the 4 1 + states in 28 Si have been analysed using the Distorted Wave Approximation with large basis models of nuclear structure. These structure models were tested by use in analyses of the longitudinal form factors obtained from inelastic electron scattering, so that analyses of the intermediate energy (p,p') data from the same transitions are then sensitive tests of the two-nucleon t-matrix. Data from these and other 2 1 + transitions in 12 C and 20 Ne at 49 MeV (24 MeV in the case of 20 Ne), were also analysed to compare models of t-matrices at lower energies. An ancilliary study of the momentum transfer dependence of effective charges has been made as both s-d shell and large basis structure models have been used to compare with form factor data up to momentum transfers of 2.5 fm -1 . The deduced momentum dependence of the effective charges is significant

Import of electric power increased by 19 %

International Nuclear Information System (INIS)

Anon.

2000-01-01

The import of electric power increased by 19% in 1999. Due to the decrease in the electric power export the net import of electric power increased even more. Electric power import from Sweden was 6000 GWh, import from Russia 5200 GWh and import from Norway 100 GWh. The electric power export in 1999 was only 200 GWh. The generation of nuclear power increased 5% and the consumption of wood-based fuels by 3%. The increase in nuclear power generation is based on increment of the power output capacities of the power plants. The consumption of peat decreased by 12% and the production of hydroelectric power by 15%. The decrement of the peat consumption is based on the changes in energy taxation. The production of hydroelectric power decreased to the normal level after the rainy year 1998. Oil consumption remained nearly the same as in 1998 even though the national product increased in 1999 by 3.5%. The wind power generation was doubled in 1999. The share of it is still only about 0.01% of the total energy consumption. Carbon dioxide emissions from coal and peat, decreased by 1.0 million tons, down to 56 million tons. The present emissions are now only about 2 million tons higher than during the reference year 1990. The emissions have decreased by 5 million tons since 1996 when they were at their highest

Precision angle-resolved autoionization resonances in Ar and Ne

Energy Technology Data Exchange (ETDEWEB)

Berrah, N.; Langer, B.; Gorczyca, T.W. [Western Michigan Univ., Kalamazoo, MI (United States)] [and others

1997-04-01

Theoretical work has shown that the electron angular distribution and the shape of the autoionization resonances are crucial to the understanding of certain types of electron-electron correlation. Autoionization resonances in Ne (Ar) result from the decay of the excited discrete state Ne{sup *} 2s2p{sup 6} np (Ar{sup *} 3s3p{sup 6} np) into the continuum state Ne{sup +} 2s{sup 2}2p{sup 5} + e{sup {minus}} (ks,kd) (Ar{sup +} 3s{sup 2}3p{sup 5} + e{sup {minus}} (ks,kd)). Since the continuum can also be reached by direct photoionization, both paths add coherently, giving rise to interferences that produce the characteristic Beutler-Fano line shape. In this work, the authors report on quantitative angle-resolved electron spectrometry studies of (a) the Ne 2s{sup 2}2p{sup 6} {r_arrow} 2s2p{sup 6} np (n=3-5) autoionizing resonances and the 2s{sup 2}2p{sup 6} {r_arrow} 2p{sup 4}3s3p doubly excited resonance, (b) the Ar 3s{sup 2}3p{sup 6} {r_arrow} 3s3p{sup 6} np (n=4-9) autoionization resonances and extended R-matrix calculations of the angular-distribution parameters for both Ne and Ar measurements. Their results are compared with previous theoretical work by Taylor.

Effects of confinement on the Rydberg molecule NeH

International Nuclear Information System (INIS)

Lo, J M H; Klobukowski, M; Bielinska-Waz, D; Diercksen, G H F; Schreiner, E W S

2005-01-01

Ab initio potential energy curves of the Rydberg NeH molecule in the presence of cylindrical spatial confinement were computed by the method of multi-reference configuration interaction with extended basis sets. The influence of the applied potential to the structures and spectra of the ground and excited states of NeH was analysed in terms of perturbation theory. In addition, the phenomenon of field-induced ionization was discussed

Three-colour photoionization optogalvanic spectroscopy in U-Ne hollow cathode discharges: observation of even-parity autoionization states of uranium

International Nuclear Information System (INIS)

Mandal, P.K.; Seema, A.U.; Das, R.C.; Shah, M.L.; Dev, Vas; Suri, B.M.

2013-01-01

Three-colour three-step photoionization spectroscopy of uranium has been performed in a U-Ne hollow cathode discharge tube by temporally resolving three-colour photoionization optogalvanic (PIOG) signal from the normal optogalvanic (OG) signal using three tunable pulsed dye lasers. U-Ne hollow cathode discharge tube has been used as a source of uranium atomic vapour and photoionization detector. Using this technique, photoionization spectra of uranium have been investigated systematically in the energy region 52150-52590 cm -1 , through three different excitation pathways, originating from its ground state, 0 cm -1 ( 5 L 0 6 ). By analyzing the three-colour photoionization spectra sixty new even-parity autoionization resonances of uranium have been identified and their probable total angular momentum (J) values have been assigned according to the J-momentum selection rule. (author)

Electron-impact cross sections of Ne

International Nuclear Information System (INIS)

Tsurubuchi, S.; Arakawa, K.; Kinokuni, S.; Motohashi, K.

2000-01-01

Electron-impact absolute emission cross sections were measured for the 3p→3s transitions of Ne. Excitation functions of the 3s→2p first resonance lines were measured in the energy range from the threshold to 1000 eV by a polarization-free optical method and relative cross sections were normalized to the absolute values, (41.0±5.4)x10 -19 cm 2 for the 73.6 nm line and (7.1±1.0)x10 -19 cm 2 for the 74.4 nm line, which were determined at 500 eV. The integrated level-excitation cross sections of Suzuki et al for the 1s 2 and 1s 4 levels were combined with the corresponding 3p→3s cascade cross sections obtained in this paper to give absolute emission cross sections for the resonance lines. The level-excitation cross sections of the 1s 2 and 1s 4 states in Paschen notation were determined from the threshold to 1000 eV by subtracting 3p→3s cascade cross sections from the corresponding 3s→2p emission cross sections of the resonance lines. A large cascade contribution is found in the emission cross section of the resonance lines. It is 28.5% for the 73.6 nm line and 49.6% for the 74.4 nm line at 40 eV, and 17.0 and 61.8%, respectively, at 300 eV. (author)

Ne beam-Kr target interaction

Energy Technology Data Exchange (ETDEWEB)

Fortov, V E; Kostin, V V; Vorob` ev, V S [Russian Academy of Sciences, Moscow (Russian Federation). High Energy Density Research Center; Kulish, M I; Mintsev, V B [Russian Academy of Sciences, Chernogolovka (Russian Federation). Inst. of Chemical Physics; Hoffman, [Gesellschaft fuer Schwerionenforschung, Darmstadt (Germany)

1997-12-31

Energetic heavy ions of Ne - crystal Kr target interaction is investigated both experimentally and with the help of a 2-D computer code. The dynamics of the target matter heating, expansion, and destruction are described. A new equation of state for Kr was obtained and tested within a wide range of parameters. (author). 2 figs., 10 refs.

19 CFR 12.7 - Permits required for importation.

Science.gov (United States)

2010-04-01

... Department of Health and Human Services under the said act require that each container of milk or cream... THE TREASURY SPECIAL CLASSES OF MERCHANDISE Milk and Cream § 12.7 Permits required for importation. (a... Federal Import Milk Act, the importation into the United States of milk and cream is prohibited unless the...

Parity nonconservation in 19 Ne atomic nucleus

International Nuclear Information System (INIS)

Popescu, Sorina; Dumitrescu, Ovidiu

1997-01-01

The possibility to extract from the experiment the necessary information concerning the charged and neutral current contributions to the structure of the weak interactions that violate the parity conservation law is investigated. The parity nonconservation (PNC) induced by weak hadron-hadron interactions, investigated via 'pairs' of low energy nuclear physics processes, is proposed. The low energy physics processes considered here are emission of polarized gamma rays from oriented and unoriented nuclei. Some comments on PNC nucleon-nucleon (PNC-NN) interaction are presented. Explicit expressions for some gamma asymmetry PNC observables are retrieved. Applications to A=19 atomic nuclei are done. A new experiment is proposed. (authors)

Physics Motivations of SciBooNE

International Nuclear Information System (INIS)

Hiraide, K.

2007-01-01

SciBooNE is a new experiment for measuring neutrino-nucleus cross sections around one GeV region, which is important for the interpretaion of neutrino oscillation experiments. Physics motivations of the experiment are described here

Charged-Current Neutral Pion production at SciBooNE

International Nuclear Information System (INIS)

Catala-Perez, J.

2009-01-01

SciBooNE, located in the Booster Neutrino Beam at Fermilab, collected data from June 2007 to August 2008 to accurately measure muon neutrino and anti-neutrino cross sections on carbon below 1 GeV neutrino energy. SciBooNE is studying charged current interactions. Among them, neutral pion production interactions will be the focus of this poster. The experimental signature of neutrino-induced neutral pion production is constituted by two electromagnetic cascades initiated by the conversion of the π 0 decay photons, with an additional muon in the final state for CC processes. In this poster, I will present how we reconstruct and select charged-current muon neutrino interactions producing π 0 's in SciBooNE.

19 CFR 10.99 - Importation of ethyl alcohol for nonbeverage purposes.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Importation of ethyl alcohol for nonbeverage purposes. 10.99 Section 10.99 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND... Provisions Ethyl Alcohol § 10.99 Importation of ethyl alcohol for nonbeverage purposes. (a) If claim is made...

Angular distributions of autoionization electrons from Ne(2p43s2) 1D in Li+-Ne collisions

International Nuclear Information System (INIS)

Oud, M.; Pas, S.F. te; Westerveld, W.B.; Niehaus, A.

1993-01-01

Angular distributions of autoionization electrons from Ne(2p 4 3s 2 ) 1 D due to Li + -Ne collisions measured in coincidence with the scattered projectile ions are presented. The measurements are performed at four different collision energies between 1.0 keV and 3.0 keV, and the complex population amplitudes for the excited 1 D state are determined. A nearly pure M = O sublevel population is found with respect to an axis coinciding with the direction of the angular distribution. The direction of the angular distribution is found to deviate from the final direction of the asymptotic internuclear axis. (author)

19 CFR 12.100 - Importations in good faith; common or contract carriage.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Importations in good faith; common or contract... Importations in good faith; common or contract carriage. (a) Exportation in lieu of seizure. Upon a claim that the importer acted in good faith without knowledge of applicable laws and regulations, Customs...

19 CFR 12.33 - Importation of tea; entry; examination for customs purposes.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Importation of tea; entry; examination for customs... SECURITY; DEPARTMENT OF THE TREASURY SPECIAL CLASSES OF MERCHANDISE Tea § 12.33 Importation of tea; entry; examination for customs purposes. (a) The importation of any merchandise as tea which is inferior in purity...

Magnetic moment of $^{17}$Ne using beta -NMR and tilted foil polarization

CERN Document Server

Baby, L T; Hass, M; Haas, H; Weissman, L; Brown, B A

2004-01-01

We report on the measurement of the magnetic moment of the ground state of /sup 17/Ne. Radioactive /sup 17/Ne nuclei were delivered from the high resolution mass separator at ISOLDE onto a high voltage platform at -200 kV and were polarized using the tilted foil polarization method. The polarized nuclei were implanted into a Pt stopper situated in a liquid-helium cooled beta -NMR apparatus and the asymmetry destruction of the ensuing beta rays was monitored as a function of the rf frequency applied to the polarized nuclei. The measured value of mu = 0.74 +or- 0.03 affirms the nu p/sub 1/2//sup - / nature of the ground state of /sup 17/Ne and is compared to shell model calculations. (10 refs).

Beta-delayed particle decay of 17Ne

International Nuclear Information System (INIS)

Morton, A.C.; Chow, J.C.; King, J.D.; Boyd, R.N.; Bateman, N.P.T.; Buchmann, L.; D'Auria, J.M.; Davinson, T.; Dombsky, M.; Galster, W.; Gete, E.; Giesen, U.; Iliadis, C.; Jackson, K.P.; Powell, J.; Roy, G.; Shotter, A.

2002-01-01

The β-delayed particle decay of 17 Ne has been studied via proton-γ coincidences, time-of-flight measurements and the ''ratio-cut technique'', allowing cleanly-separated proton and α-particle spectra to be obtained. A complete set of proton and α branching ratios for the decay of 14 excited states in 17 F to the ground and excited states of 16 O and 13 N has been determined and branching ratios for the β decay of 17 Ne to these states have been deduced. From the branching ratios, f A t values and reduced Gamow-Teller matrix elements were calculated; no indication of isospin mixing in the isobaric analog state in 17 F was observed. From the measurement of proton-γ angular correlations, combined with the selection rules for an allowed β decay, we obtain J π =((1)/(2)) - for states at 8.436 and 9.450 MeV and ((3)/(2)) - for the state at 10.030 MeV in 17 F. Probabilities for the β-delayed pα decay to 12 C through the tails of the subthreshold 7.117 and 6.917 MeV states in 16 O have been calculated and the feasibility of using such decays to provide information about the rates for the E1 and E2 components of the 12 C(α,γ) 16 O reaction is discussed

Contribution of alpha cluster exchange to elastic and inelastic 16O--20Ne scattering

International Nuclear Information System (INIS)

Stock, R.; Schneider, W.F.W.; Jahnke, U.; Hendrie, D.L.; Mahoney, J.; Maguire, C.F.; Scott, D.K.; Wolschin, G.

1975-01-01

The cluster structure of the ground state rotational band of 20 Ne was studied via the elastic and inelastic scattering of 50 MeV 20 Ne from 16 O. Angular distributions are compared with microscopic calculations

19 CFR 113.75 - Bond conditions for deferral of duty on large yachts imported for sale at United States boat shows.

Science.gov (United States)

2010-04-01

... yachts imported for sale at United States boat shows. 113.75 Section 113.75 Customs Duties U.S. CUSTOMS... Customs Bond Conditions § 113.75 Bond conditions for deferral of duty on large yachts imported for sale at....C. 1484b for a dutiable large yacht imported for sale at a United States boat show must conform to...

19 CFR 10.46 - Articles for the United States.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Articles for the United States. 10.46 Section 10... THE TREASURY ARTICLES CONDITIONALLY FREE, SUBJECT TO A REDUCED RATE, ETC. General Provisions Articles for Institutions § 10.46 Articles for the United States. Pursuant to subheadings 9808.00.10 and 9808...

Characteristics of planned and unplanned home births in 19 States.

Science.gov (United States)

Declercq, Eugene; Macdorman, Marian F; Menacker, Fay; Stotland, Naomi

2010-07-01

To estimate the differences in the characteristics of mothers having planned and unplanned home births that occurred at home in a 19-state reporting area in the United States in 2006. Data are from the 2006 U.S. vital statistics natality file. Information on whether a home birth was planned or unplanned was available from 19 states, representing 49% of all home births nationally. Data were examined by maternal age, race or ethnicity, education, marital status, live birth order, birthplace of mother, gestational age, prenatal care, smoking status, state, population of county of residence, and birth attendant. We could not identify planned home births that resulted in a transfer to the hospital. Of the 11,787 home births with planning status recorded in the 19 states studied here, 9,810 (83.2%) were identified as planned home births. The proportion of all births that occurred at home that were planned varied from 54% to 98% across states. Unplanned home births are more likely to involve mothers who are non-white, younger, unmarried, foreign-born, smokers, not college-educated, and with no prenatal care. Unplanned home births are also more likely to be preterm and to be attended by someone who is neither a doctor nor a midwife and is listed as either "other" or "unknown." Planned and unplanned home births differ substantially in characteristics, and distinctions need to be drawn between the two in subsequent analyses. III.

Role of deformation in odd-even staggering in reaction cross sections for 30,31,32Ne and 36,37,38Mg isotopes

Science.gov (United States)

Urata, Y.; Hagino, K.; Sagawa, H.

2017-12-01

We discuss the role of pairing antihalo effect in the observed odd-even staggering in reaction cross sections for 30,31,32Ne and 36,37,38Mg isotopes by taking into account the ground-state deformation of these nuclei. To this end, we construct the ground-state density for the Ne,3130 and Mg,3736 nuclei based on a deformed Woods-Saxon potential, while for the 32Ne and 38Mg nuclei we also take into account the pairing correlation using the Hartree-Fock-Bogoliubov method. We demonstrate that, when the one-neutron separation energy is small for the odd-mass nuclei, a significant odd-even staggering still appears even with finite deformation, although the degree of staggering is somewhat reduced compared to the spherical case. This implies that the pairing antihalo effect in general plays an important role in generating the odd-even staggering in reaction cross sections for weakly bound nuclei.

Component state-based integrated importance measure for multi-state systems

International Nuclear Information System (INIS)

Si, Shubin; Levitin, Gregory; Dui, Hongyan; Sun, Shudong

2013-01-01

Importance measures in reliability engineering are used to identify weak components and/or states in contributing to the reliable functioning of a system. Traditionally, importance measures do not consider the possible effect of groups of transition rates among different component states, which, however, has great effect on the component probability distribution and should therefore be taken into consideration. This paper extends the integrated importance measure (IIM) to estimate the effect of a component residing at certain states on the performance of the entire multi-state systems. This generalization of IIM describes in which state it is most worthy to keep the component to provide the desired level of system performance, and which component is the most important to keep in some state and above for improving the performance of the system. An application to an oil transportation system is presented to illustrate the use of the suggested importance measure

Electron pumping of the ground state of 21Ne. Transfers and multiple diffusion processes

International Nuclear Information System (INIS)

Stoeckel, F.; Lombardi, M.

1978-01-01

The electron-pumping process of the ground state of 21 Ne has been studied. It is demonstrated how in a neon cell at a pressure of 10 -4 to 10 -2 torr, a high frequency discharge can create a nuclear spin alignment in the fundamental level (I=3/2) when the excited levels are themselves aligned. The nuclear alignment is observed by monitoring the change of the linear polarization of several optical transitions during the magnetic resonance of the fundamental level. Various transfers of the alignments are investigated and a detailed study of the influence of the multiple diffusion is carried out. The multiple diffusion produces a depolarization and a relaxation of the nuclear spin. A theoretical calculation has been made for a two-level system with a J=1 radiative level and a J=0 ground state. Experimentally a relaxation time of the nuclear alignment varying from 37 ms to 240 ms is observed when the neon pressure decreases from 10 -2 to 10 -4 torr [fr

19 CFR 7.3 - Duty-free treatment of goods imported from insular possessions of the United States other than...

Science.gov (United States)

2010-04-01

... INSULAR POSSESSIONS AND GUANTANAMO BAY NAVAL STATION § 7.3 Duty-free treatment of goods imported from...) The goods became a new and different article of commerce as a result of production or manufacture... possession or the United States results from the original commercial transaction between the importer and the...

MicroBooNE and its Cross Section Measurement

Energy Technology Data Exchange (ETDEWEB)

Tsai, Yun-Tse [SLAC

2017-05-22

MicroBooNE (the Micro Booster Neutrino Experiment) is a short-baseline neutrino experiment based on the technology of a liquid-argon time-projection chamber (LArTPC), and has recently completed its first year of data-taking in the Fermilab Booster Neutrino Beam. It aims to address the anomalous excess of events with an electromagnetic final state in MiniBooNE, to measure neutrino-argon interaction cross sections, and to provide relevant R\\&D for the future LArTPC experiments, such as DUNE. In these proceedings, we present the first reconstructed energy spectrum of Michel electrons from cosmic muon decays, the first kinematic distributions of the candidate muon tracks from $\

A numerical study of threshold states

International Nuclear Information System (INIS)

Ata, M.S.; Grama, C.; Grama, N.; Hategan, C.

1979-01-01

There are some experimental evidences of charged particle threshold states. On the statistical background of levels, some simple structures were observed in excitation spectrum. They occur near the coulombian threshold and have a large reduced width for the decay in the threshold channel. These states were identified as charged cluster threshold states. Such threshold states were observed in sup(15,16,17,18)O, sup(18,19)F, sup(19,20)Ne, sup(24)Mg, sup(32)S. The types of clusters involved were d, t, 3 He, α and even 12 C. They were observed in heavy-ions transfer reactions in the residual nucleus as strong excited levels. The charged particle threshold states occur as simple structures at high excitation energy. They could be interesting both from nuclear structure as well as nuclear reaction mechanism point of view. They could be excited as simple structures both in compound and residual nucleus. (author)

Probing astrophysically important states in the 26Mg nucleus to study neutron sources for the s process

Science.gov (United States)

Talwar, R.; Adachi, T.; Berg, G. P. A.; Bin, L.; Bisterzo, S.; Couder, M.; deBoer, R. J.; Fang, X.; Fujita, H.; Fujita, Y.; Görres, J.; Hatanaka, K.; Itoh, T.; Kadoya, T.; Long, A.; Miki, K.; Patel, D.; Pignatari, M.; Shimbara, Y.; Tamii, A.; Wiescher, M.; Yamamoto, T.; Yosoi, M.

2016-05-01

Background: The 22Ne(α ,n )25Mg reaction is the dominant neutron source for the slow neutron capture process (s process) in massive stars, and contributes, together with 13C (α ,n )16O, to the production of neutrons for the s process in asymptotic giant branch (AGB) stars. However, the reaction is endothermic and competes directly with 22Ne(α ,γ )26Mg radiative capture. The uncertainties for both reactions are large owing to the uncertainty in the level structure of 26Mg near the α and neutron separation energies. These uncertainties affect the s -process nucleosynthesis calculations in theoretical stellar models. Purpose: Indirect studies in the past have been successful in determining the energies and the γ -ray and neutron widths of the 26Mg states in the energy region of interest. But, the high Coulomb barrier hinders a direct measurement of the resonance strengths, which are determined by the α widths for these states. The goal of the present experiments is to identify the critical resonance states and to precisely measure the α widths by α -transfer techniques. Methods: The α -inelastic scattering and α -transfer measurements were performed on a solid 26Mg target and a 22Ne gas target, respectively, using the Grand Raiden Spectrometer at the Research Center for Nuclear Physics in Osaka, Japan. The (α ,α') measurements were performed at 0 .45∘ , 4 .1∘ , 8 .6∘ , and 11 .1∘ and the (6Li,d ) measurements at 0∘ and 10∘. The scattered α particles and deuterons were detected by the focal plane detection system consisting of multiwire drift chambers and plastic scintillators. The focal plane energy calibration allowed the study of 26Mg levels from Ex = 7.69-12.06 MeV in the (α ,α') measurement and Ex = 7.36-11.32 MeV in the (6Li,d ) measurement. Results: Six levels (Ex = 10717, 10822, 10951, 11085, 11167, and 11317 keV) were observed above the α threshold in the region of interest (10.61-11.32 MeV). The α widths were calculated for these

Cross section analyses in MiniBooNE and SciBooNE experiments

OpenAIRE

Katori, Teppei

2013-01-01

The MiniBooNE experiment (2002-2012) and the SciBooNE experiment (2007-2008) are modern high statistics neutrino experiments, and they developed many new ideas in neutrino cross section analyses. In this note, I discuss selected topics of these analyses.

Relation between the 16O(α,γ)20Ne capture reaction and its reverse 20Ne(γ,α)16O photodisintegration reaction in stars and in the lab

International Nuclear Information System (INIS)

Mohr, P.; Angulo, C.; Descouvemont, P.

2005-01-01

The astrophysical reaction rates of the 16 O(α,γ) 20 Ne capture reaction and its reverse 20 Ne(γ,α) 16 O photodisintegration reaction are dominated by a few narrow resonances. Only at very low temperatures direct capture plays a significant role. Usually the reaction rate of photodisintegration reactions is calculated from the reaction rate of the corresponding capture reaction using the detailed balanced theorem. This is only valid for nuclei which are thermalized. The reaction rates of the 16 O(α,γ) 20 Ne capture reaction in the lab and under stellar conditions are identical. However, for the inverse 20 Ne(γ,α) 16 O photodisintegration reaction one finds a significant contribution of the thermally populated first excited state at E x = 1634 keV in 20 Ne. Consequently, the reaction rates of the 20 Ne(γ,α) 16 O photodisintegration reaction are different in the lab and under stellar conditions. It is shown that the detailed balance theorem remains valid for the reaction rates under stellar conditions. Photodisintegration rates in the lab have been measured recently using a quasi-thermal photon spectrum from bremsstrahlung, and a quasi-thermal photon spectrum with superior quality has been suggested using high-energy synchrotron radiation. (author)

Study of the $\\beta$-delayed Particle Emission of $^{17}$Ne

CERN Multimedia

2002-01-01

We intend to investigate the charged particle decay modes from the excited states of $^{17}$F populated in the $\\beta^+$- decay of $^{17}$Ne. In particular, we propose to study the proton decay branches to $^{16}$O states which are unstable to $\\alpha$- decay. We plan to use the recently developed ISOLDE Si-ball detector array in order to efficiently detect the charged particles in a wide solid angle. We ask for a total of 12 shifts, including 9 shifts for $^{17}$Ne and 3 shifts for stable beam and calibrations. We request the use of a Mg oxide target coupled to a plasma ion source with cooled transfer line or, if possible, to the new MINIMONOECRIS. We would like to make use of the ISOLDE VME DAQ and CERN data storage system.

neXtA5: accelerating annotation of articles via automated approaches in neXtProt.

Science.gov (United States)

Mottin, Luc; Gobeill, Julien; Pasche, Emilie; Michel, Pierre-André; Cusin, Isabelle; Gaudet, Pascale; Ruch, Patrick

2016-01-01

The rapid increase in the number of published articles poses a challenge for curated databases to remain up-to-date. To help the scientific community and database curators deal with this issue, we have developed an application, neXtA5, which prioritizes the literature for specific curation requirements. Our system, neXtA5, is a curation service composed of three main elements. The first component is a named-entity recognition module, which annotates MEDLINE over some predefined axes. This report focuses on three axes: Diseases, the Molecular Function and Biological Process sub-ontologies of the Gene Ontology (GO). The automatic annotations are then stored in a local database, BioMed, for each annotation axis. Additional entities such as species and chemical compounds are also identified. The second component is an existing search engine, which retrieves the most relevant MEDLINE records for any given query. The third component uses the content of BioMed to generate an axis-specific ranking, which takes into account the density of named-entities as stored in the Biomed database. The two ranked lists are ultimately merged using a linear combination, which has been specifically tuned to support the annotation of each axis. The fine-tuning of the coefficients is formally reported for each axis-driven search. Compared with PubMed, which is the system used by most curators, the improvement is the following: +231% for Diseases, +236% for Molecular Functions and +3153% for Biological Process when measuring the precision of the top-returned PMID (P0 or mean reciprocal rank). The current search methods significantly improve the search effectiveness of curators for three important curation axes. Further experiments are being performed to extend the curation types, in particular protein-protein interactions, which require specific relationship extraction capabilities. In parallel, user-friendly interfaces powered with a set of JSON web services are currently being

Physics at DAΦNE

International Nuclear Information System (INIS)

Franzini, P.J.

1995-01-01

In this talk, I will give a brief description of the φ factory DAΦNE at Frascati, explaining why a φ factory is an interesting place to do new physics, and then discuss the physics that can be done at DAΦNE. I will concentrate on CP violation as it can be studied at DAΦNE. This is, after all, the raison d'etre of DAΦNE. I start with a brief general introduction to CP violation in the KK system, and the distinction between mass-mixing CP violation (ε) and intrinsic CP violation (ε'/ε). After presenting a summary of ε'/ε measurements up to now, and briefly discussing the theory of ε'/ε (the so-called 'penguins'), I will cover the particularities of measuring ε'/ε at a φ factory, such as tagging and interferometry. Finally, I will say a few words about searching for CP violation in modes where it has never before been seen. I will end my talk with a list of other physics topics at DAΦNE, and rare decay branching ratio limits that can be achieved there, just to give a flavor of what else can be done. (author) 8 figs., 2 tabs., 22 refs

The connection between cluster and collective quadrupole channels in 20 Ne and E 2-transition probabilities between the bound and continuous spectrum states

International Nuclear Information System (INIS)

Bystrenko, A.V.; Okhrimenko, I.P.

1993-01-01

The E 2-transition probabilities between the discrete and continuous spectrum states in 20 Ne are investigated using the two-channel version (making allowance for the connection between cluster and quadrupole channels) of the consistent microscopic approach,an algebraic version of the resonating-group method. The correctness of the approximation of the continuous spectrum by the discrete states, which is usual in collective models, the quadrupole sum rule and the giant quadrupole resonance phenomenon are considered. (author). 2 tab., 12 figs

MicroBooNE: The Search For The MiniBooNE Low Energy Excess

Energy Technology Data Exchange (ETDEWEB)

Kaleko, David [Columbia Univ., New York, NY (United States)

2017-01-01

This thesis describes work towards the search for a low energy excess in MicroBooNE. What MicroBooNE is, what the low energy excess is, and how one searches for the latter in the former will be described in detail.

Cartesian coupled coherent states simulations: Ne(n)Br2 dissociation as a test case.

Science.gov (United States)

Reed, Stewart K; González-Martínez, Maykel L; Rubayo-Soneira, Jesús; Shalashilin, Dmitrii V

2011-02-07

In this article, we describe coupled coherent states (CCS) simulations of vibrational predissociation of weakly bounded complexes. The CCS method is implemented in the Cartesian frame in a manner that is similar to classical molecular dynamics. The calculated lifetimes of the vibrationally excited Ne-Br(2)(ν) complexes agree with experiment and previous calculations. Although the CCS method is, in principle, a fully quantum approach, in practice it typically becomes a semiclassical technique at long times. This is especially true following dissociation events. Consequently, it is very difficult to converge the quantum calculations of the final Br(2) vibrational distributions after predissociation and of the autocorrelation functions. However, the main advantage of the method is that it can be applied with relative ease to determine the lifetimes of larger complexes and, in order to demonstrate this, preliminary results for tetra- and penta-atomic clusters are reported.

Arisaema gracilentum, a new species of Arisaema (Araceae) from NE India

NARCIS (Netherlands)

Bruggeman, P.

2016-01-01

Arisaema gracilentum, a new species of Araceae, belonging to section Arisaema from the Lower Dibang Valley, Arunachal Pradesh State in NE India is described, illustrated and compared with related taxa.

Glacial meltwater influences on plankton community structure and the importance of top-down control (of primary production) in a NE Greenland fjord

DEFF Research Database (Denmark)

Arendt, Kristine Engel; Agersted, Mette Dalgaard; Sejr, Mikael Kristian

2016-01-01

Freshwater runoff from the Greenland Ice Sheet (GIS) can be an important driver influencing plankton community structure in Greenland fjords. In the present study, we describe physical, taxonomic and functional differences in the plankton community in Young Sound, a NE Greenland fjord, from......, and their grazing impact was the highest among the copepod groups. Copepod grazing impact on the phytoplankton standing stock, however, was exceeded by microzooplankton grazing, investigated by dilution experiments, with the highest grazing impact on the phytoplankton standing stock of 63% d−1 in the inner part...

Experimental ion mobility measurements in Ne-N2

International Nuclear Information System (INIS)

Cortez, A.F.V.; Encarnação, P.M.C.C.; Santos, F.P.; Borges, F.I.G.M.; Conde, C.A.N.; Veenhof, R.; Neves, P.N.B.

2016-01-01

Data on ion mobility is important to improve the performance of large volume gaseous detectors, such as the ALICE TPC or in the NEXT experiment. In the present work the method, experimental setup and results for the ion mobility measurements in Ne-N 2 mixtures are presented. The results for this mixture show the presence of two peaks for different gas ratios of Ne-N 2 , low reduced electric fields, E / N , 10–20 Td (2.4–4.8 kV·cm −1 ·bar −1 ), low pressures 6–8 Torr (8–10.6 mbar) and at room temperature.

Compressional behavior of solid NeHe2 up to 90 GPa

International Nuclear Information System (INIS)

Fukui, Hiroshi; Baron, Alfred Q R; Hirao, Naohisa; Ohishi, Yasuo

2010-01-01

NeHe 2 was compressed to about 90 GPa using a diamond anvil cell technique. The crystal structure was confirmed to be stable with hexagonal symmetry in the investigated pressure range and its p-V equation of state was determined by angular dispersive x-ray diffraction with synchrotron radiation. With the help of ab initio calculations, the compressibility and inter-atomic distances of NeHe 2 were compared with those of a helium and neon mixture of the same composition. This study shows that the bulk modulus of NeHe 2 is between those of neon and helium and that linear compressibilities of the inter-atomic distances are different from those of the elementary solids. This material can be a pressure-transmitting medium, providing both a large sample space and good quasi-hydrostatic conditions.

Neutrino Interactions in MicroBooNE

OpenAIRE

Del Tutto, Marco

2017-01-01

MicroBooNE is a liquid-argon-based neutrino experiment, which began collecting data in Fermilab's Booster neutrino beam in October 2015. Physics goals of the experiment include probing the source of the anomalous excess of electron-like events in MiniBooNE. In addition to this, MicroBooNE is carrying out an extensive cross section physics program that will help to probe current theories on neutrino-nucleon interactions and nuclear effects. These proceedings summarise the status of MicroBooNE'...

Alpha-capture reaction rates for 22 Ne (α , n) via sub-Coulomb alpha-transfer and its effect on final abundances of s-process isotopes

Science.gov (United States)

Jayatissa, Heshani; Rogachev, Grigory; Koshchiy, Yevgeny; Goldberg, Vladilen; Hooker, Joshua; Hunt, Curtis; Magana, Cordero; Roeder, Brian; Saastamoinen, Antti; Spiridon, Alexandria; Upadhyayula, Sriteja; Trippella, Oscar

2017-09-01

The 22 Ne (α , n) reaction is a very important neutron source reaction for the slow neutron capture process (s-process) in asymptotic giant branch stars. These direct measurements are very difficult to carry out at the energy regimes of interest for astrophysics (Gamow energies) due to the extremely small reaction cross section. The large uncertainties introduced when extrapolating direct measurements at high energies down to the Gamow energies can be overcome by measuring the Asymptotic Normalization Coefficients (ANC) of the relevant states using α-transfer reactions at sub-Coulomb energies to reduce the optical model dependence. The study of the 22Ne(6Li,d) and 22Ne(7Li,t) reaction was carried out at the Cyclotron Institute at Texas A&M University. The α-ANC measurements for the near α-threshold resonances of 26Mg provide constraints for the 22Ne(α,n) reaction rate. The effect of this reaction rate on the final abundances of the s-process isotopes will be discussed.

Photoemission from excited states in rare gas solids by combining synchrotronradiation with a laser

International Nuclear Information System (INIS)

Bernstorff, S.

1984-09-01

A new spectroscopic method has been developed to study excited states in rare gas solids: Excitons and conductionband-states are populated by synchrotron radiation (photon energy hw SR =5 - 30 eV). Subsequently electrons from these bound or conduction band-states are excited above the vacuum level of the solid by a pulsed dye laser (hw L =1.9 - 3.7 eV). This experimental technique was applied to solid Xe, Kr, Ar and Ne. (orig./GSCH)

Single electron capture in N^+ -(Ne, Kr, Xe) collisions

Science.gov (United States)

Reyes, Pedro G.; Castillo, Fermin; Martinez, Horacio

2001-05-01

Total cross sections for single electron capture of N^+ ions impinging on Ne, Kr and Xe were measured in the energy range of 1.5 to 5.0 keV. The electron capture cross sections for all the targets studied are found to be in excellent agreement with previous data in the low-energy range. The present data together with previous measurements give a general shape of the whole curve of single electron capture cross sections for the N^+ - Ne system. For the cases of N^+ - (Kr, Xe) systems, semiempirical calculation using the two-state approximation are in very good agreement with present cross sections data. Research supported by DGAPA IN-100392 and CONACyT 32175-E

Dielectronic recombination into excited levels of Ne-like titanium from F-like low-lying states

International Nuclear Information System (INIS)

Qiu Yanghui; Li Shichang; Sun Yongsheng

1993-01-01

The energy levels, wavelengths, oscillator strengths, Auger rates and level-to-level dielectronic recombination rate coefficients describing dielectronic recombination into excited levels of Ne-like titanium from F-like low-lying states are calculated. Our calculations are based on Dr. R.D. Cowan's semi-relativistic mass-velocity and Darwin corrections are included in the Hamiltonian, and the distorted-wave model is used for the calculation of free electron wavefunctions. In order to set the recombination rate coefficients on a level by level basis, in a manner compatible with detailed level population kinetics modelling of highly-stripped ions in plasma, the dielectronic recombination rate coefficients as a function of free electron temperatures are given in an analytical form, which is not only very convenient in practice, but also hopefully accurate compared with the exactly calculated numerical results. (orig.)

The MiniBooNE Detector

OpenAIRE

MiniBooNE Collaboration

2008-01-01

The MiniBooNE neutrino detector was designed and built to look for muon-neutrino to electron-neutrino oscillations in the mixing parameter space region where the LSND experiment reported a signal. The MiniBooNE experiment used a beam energy and baseline that were an order of magnitude larger than those of LSND so that the backgrounds and systematic errors would be completely different. This paper provides a detailed description of the design, function, and performance of the MiniBooNE detector.

The transnational ne bis in idem principle in the EU. Mutual recognition and equivalent protection of human rights

Directory of Open Access Journals (Sweden)

John A.E. Vervaele

2005-12-01

Full Text Available The deepening and widening of European integration has led to an increase in transborder crime. Concurrent prosecution and sanctioning by several Member States is not only a problem in inter-state relations and an obstacle in the European integration process, but also a violation of the ne bis in idem principle, defined as a transnational human right in a common judicial area. This article analyzes whether and to what extent the ECHR has contributed and may continue to contribute to the development of such a common ne bis in idem standard in Europe. It is also examined whether the application of the ne bis in idem principle in classic inter-state judicial cooperation in criminal matters in the framework of the Council of Europe may make such a contribution as well. The transnational function of the ne bis in idem principle is discussed in the light of the Court of Justice’s case law on ne bis in idem in the framework of the area of Freedom, Security and Justice. Finally the inherent tension between mutual recognition and the protection of human rights in transnational justice is analyzed by looking at the insertion of the ne bis in idem principle in the Framework Decision on the European arrest warrant.

The geology of uranium mineralization at Mika, N.E. Nigeria

International Nuclear Information System (INIS)

Funtua, I.I.; Okujeni, C.P.; Elegba, S.B.

1995-01-01

The Uranium mineralization at Mike is located near Zing in Taraba State, N.E., Nigeria. The host rock consist of a sheared Pan-African medium-grained granite which is in places intruded by rhyolite and siliceous veins. Numerous joints, faults and fractures criss-cut the area. Some of the fractures are filled with secondary quartz. The ore occurs in two parallel N-S trending shear Zones with the western limb hosting a rhyolite body. Drill section reveals a subsurface extension of the mineralization. In the upper limb, mineralization consisting of metal autunite and coffinite occurs associated with the rhyolite body. In lower ore limb meta-autunite, coffinite and pitchblende occur along a set of two parallel shear surface. The pitchblende occurs massive and as vein lets in association with sulphides. The ore body is marked by distinct hydrothermal alteration zones which feature sericitization, silicification, hematization and kaolination. Reactivated regional structures of NE-SW and the N140oE and N170E played an important role in the formation of Mika mineralization. These acted as channel and as mechanical barrier for the mineralization fluid. The bimodal magmatism of the Burashika group is postulated to be related to the process of mineralization in view of the ubiquitous rhyolite in the mineralized bodies

Cluster structure of 20Ne and 40Ca

International Nuclear Information System (INIS)

Taniguchi, Yasutaka

2004-01-01

A d-constraint for calculating the wave functions of various kinds of configurations of cluster structure and optimizing the inside wave functions of the cluster was developed. The wave functions of various kinds of cluster structures were calculated by constraining and energy variation of the antisymmetrized molecular dynamics wave functions. The cluster structure of nucleus was reproduced by linear combination of the above wave functions by the generator coordinate method. By superposition of both wave functions calculated using d-constraint and β-constraint, K π =O 3 + rotation band of 20 Ne was reproduced. The excitation energies of 20 Ne were calculated. The result of calculation energies of α- 36 Ar structure of 40 Ca are higher values than expected them. Framework, AMD wave function, constraint, calculation results and discussions are stated. (S.Y.)

Could LC-NE-Dependent Adjustment of Neural Gain Drive Functional Brain Network Reorganization?

Directory of Open Access Journals (Sweden)

Carole Guedj

2017-01-01

Full Text Available The locus coeruleus-norepinephrine (LC-NE system is thought to act at synaptic, cellular, microcircuit, and network levels to facilitate cognitive functions through at least two different processes, not mutually exclusive. Accordingly, as a reset signal, the LC-NE system could trigger brain network reorganizations in response to salient information in the environment and/or adjust the neural gain within its target regions to optimize behavioral responses. Here, we provide evidence of the co-occurrence of these two mechanisms at the whole-brain level, in resting-state conditions following a pharmacological stimulation of the LC-NE system. We propose that these two mechanisms are interdependent such that the LC-NE-dependent adjustment of the neural gain inferred from the clustering coefficient could drive functional brain network reorganizations through coherence in the gamma rhythm. Via the temporal dynamic of gamma-range band-limited power, the release of NE could adjust the neural gain, promoting interactions only within the neuronal populations whose amplitude envelopes are correlated, thus making it possible to reorganize neuronal ensembles, functional networks, and ultimately, behavioral responses. Thus, our proposal offers a unified framework integrating the putative influence of the LC-NE system on both local- and long-range adjustments of brain dynamics underlying behavioral flexibility.

Observation of even-parity autoionization states of uranium by three-colour photoionization optogalvanic spectroscopy in U–Ne hollow cathode discharges

International Nuclear Information System (INIS)

Mandal, P.K.; Seema, A.U.; Das, R.C.; Shah, M.L.; Dev, Vas; Suri, B.M.

2013-01-01

Three-colour three-step photoionization spectroscopy of uranium has been performed in a U–Ne hollow cathode discharge tube by temporally resolving three-colour photoionization optogalvanic (PIOG) signal from the normal optogalvanic (OG) signal using three tunable pulsed dye lasers. U–Ne hollow cathode discharge tube has been used as a source of uranium atomic vapours and photoionization detector. Using this technique, photoionization spectra of uranium have been investigated systematically in the energy region 52,150–52,590 cm −1 , through three different excitation pathways, originating from its ground state, 0 cm −1 ( 5 L o 6 ). By analysing the three-colour photoionization spectra sixty new even-parity autoionization resonances of uranium have been identified and their probable total angular momentum (J) values have been assigned according to the J-momentum selection rule. The J-value of five autoionization resonances, which have been observed either through all three excitation pathways or through two different excitation pathways where J-value of the second excited levels differs by two, has been assigned uniquely. -- Highlights: ► Three-colour photoionization optogalvanic spectroscopy of uranium was performed in a U–Ne hollow cathode discharge tube. ► Hollow cathode discharge tube was used as a source of atomic vapour and laser ionisation detector. ► Uranium photoionization spectra were investigated through three different three-colour photoionization schemes. ► Sixty new even-parity autoionization levels of uranium were identified. ► J-value of five autoionization levels was assigned uniquely

Estimation of the effective population size (Ne) and its application in the management of small populations

DEFF Research Database (Denmark)

Jimenez Mena, Belen

2016-01-01

Effective population size (Ne) is an important concept to understand the evolution of a population. In conservation, Ne is used to assess the threat status of a population, evaluate its genetic viability in the future and set conservation priorities. An accurate estimation of Ne is thus essential....... The main objective of this thesis was to better understand how the estimation of Ne using molecular markers can be improved for use in conservation genetics. As a first step, we undertook a simulation study where three different methods to estimate Ne were investigated. We explored how well these three...... methods performed under different scenarios. This study showed that all three methods performed better when the number of unlinked loci used to make the estimation increased and the minimum number of loci need for an accurate estimation of Ne was 100 SNPs. A general assumption in the estimation of Ne...

The NeXus data format

OpenAIRE

Könnecke, Mark; Akeroyd, Frederick A.; Osborn, Raymond; Peterson, Peter F.; Richter, Tobias; Suzuki, Jiro; Watts, Benjamin; Wintersberger, Eugen; Wuttke, Joachim; Bernstein, Herbert J.; Brewster, Aaron S.; Campbell, Stuart I.; Clausen, Björn; Cottrell, Stephen; Hoffmann, Jens Uwe

2015-01-01

NeXus is an effort by an international group of scientists to define a common data exchange and archival format for neutron, X-ray and muon experiments. NeXus is built on top of the scientific data format HDF5 and adds domain-specific rules for organizing data within HDF5 files, in addition to a dictionary of well defined domain-specific field names. The NeXus data format has two purposes. First, it defines a format that can serve as a container for all relevant data associated with a beamlin...

The MiniBooNE detector

International Nuclear Information System (INIS)

Aguilar-Arevalo, A.A.; Anderson, C.E.; Bartoszek, L.M.; Bazarko, A.O.; Brice, S.J.; Brown, B.C.; Bugel, L.; Cao, J.; Coney, L.; Conrad, J.M.; Cox, D.C.; Curioni, A.; Djurcic, Z.; Finley, D.A.; Fleming, B.T.; Ford, R.; Garcia, F.G.; Garvey, G.T.; Green, C.; Green, J.A.

2009-01-01

The MiniBooNE neutrino detector was designed and built to look for ν μ →ν e oscillations in the (sin 2 2θ,Δm 2 ) parameter space region where the LSND experiment reported a signal. The MiniBooNE experiment used a beam energy and baseline that were an order of magnitude larger than those of LSND so that the backgrounds and systematic errors would be completely different. This paper provides a detailed description of the design, function, and performance of the MiniBooNE detector.

Kinetic model of a Ne-H2 Penning Recombination Laser operating in the hollow cathode discharge

International Nuclear Information System (INIS)

Pramatarov, P.M.; Stefanova, M.S.; Petrov, G.M.

1995-01-01

The Penning Recombination Laser (PRL) requires the presence of both a recombination plasma populating the upper laser level (ULL) and a gas component efficiently depopulating the lower laser level (LLL) by Penning reactions. Such requirements are met in the negative glow plasma of a pulsed high voltage Ne-H 2 discharge with a helical hollow cathode. High rates of ionizations followed by recombinations are reached due to the beam component of non-Maxwellian electrons of 1-2 keV energy present in the tail of the electron energy distribution function. The H 2 , on the one hand plays the role of Penning component and on the other hand effectively cools the electrons by rotational and vibrational levels excitation. The latter contributes to the effectiveness of the recombination processes. A kinetic model of the physical processes determining the inversion population on the NeI(2p 1 -1s 2 ) transition (the 585.3 nm line) in a Ne-H 2 PRL operating in a high voltage hollow cathode discharge at intermediate pressures is proposed. About 60 plasma-chemical reactions are considered in the model. These include: two-electron recombination of Ne + ; dissociative recombination of Ne 2 + , NeH + and H 2 + ; ion-ion recombination of Ne + and H - ; Ne and H 2 direct ionization by fast electrons; Ne stepwise ionization; Penning ionization; Ne excitation by fast electrons; Ne stepwise excitation and de-excitation; radiative transitions; electron mixing between Ne excited states; H 2 rotational and vibrational levels excitation; H 2 dissociative attachment; elastic electron collisions with H 2 and Ne. The rate constants for the reactions are either taken from the literature or calculated in this work

The resonant structure of ^18Ne and its relevance in the breakout of the Hot CNO cycle

Science.gov (United States)

Almaraz-Calderon, S.; Tan, W.; Aprahamian, A.; Bucher, B.; Gorres, J.; Roberts, A.; Villano, A.; Wiescher, M.; Brune, C.; Heinen, Z.; Massey, T.; Mach, H.; Guray, N.; Guray, R. T.

2009-10-01

In explosive hydrogen burning environments such as Novae and X-ray bursts, temperatures and densities achieved are sufficiently high to bypass the beta decay of the waiting points of the hot CNO cycle by alpha captures, leading to a thermonuclear runaway via the rp-process. One of the two paths to a breakout from the hot CNO cycle is the route starting from ^14O(α,p)^17F followed by ^17F(p,γ)^18Ne and ^18Ne(α,p). The ^14O(α,p) reaction proceeds through resonant states in ^18Ne, making the reaction rate dependent on the excitation energies and spins as well as partial and total widths of these resonances. We used the ^16O(^3He,n) reaction and charged particle-neutron coincidences to measure the structure details of levels in ^18Ne. In particular, the α and proton decay branching ratios via ground state and excited states in ^17F were measured. The analysis of the data will allow us to provide crucial information to be included in the reaction network calculations that could have great impact on the nuclear energy generation and nucleosynthesis that occur in these explosive environments.

Photodouble ionization studies of the Ne(2s{sup 2}) state under unequal energy sharing conditions

Energy Technology Data Exchange (ETDEWEB)

Bolognesi, P [CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo Scalo, Rome (Italy); Kheifets, A [Research School of Physical Sciences and Engineering, Australian National University, Canberra (Australia); Otranto, S [Physics Department, University of Missouri-Rolla, Rolla MO (United States); CONICET and Depto. de Fisica, Universidad Nacional del Sur, 8000 Bahia Blanca (Argentina); Coreno, M [CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo Scalo, Rome (Italy); CNR-TASC, Gas Phase Photoemission Beamline at Elettra, Area Science Park, Trieste (Italy); Feyer, V [CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo Scalo, Rome (Italy); Institute of Electron Physics, National Academy of Sciences, Uzhgorod (Ukraine); Colavecchia, F D [CONICET and Centro Atomico Bariloche, 8400 SC de Bariloche (Argentina); Garibotti, C R [CONICET and Centro Atomico Bariloche, 8400 SC de Bariloche (Argentina); Avaldi, L [CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo Scalo, Rome (Italy); CNR-TASC, Gas Phase Photoemission Beamline at Elettra, Area Science Park, Trieste (Italy)

2006-04-28

The triple differential cross section (TDCS) of the He{sup 2+}(1s{sup -2}) and Ne{sup 2+}(2s{sup -2}) states has been studied under unequal energy sharing conditions and perpendicular geometry, for a ratio of about 3 between the energies of the two ejected electrons. The dynamical quantities which govern the photodouble ionization (PDI) process, i.e. the squared moduli of the gerade and ungerade complex amplitudes and the cosine of their relative phase, have been extracted from the experimental data. The results from the two targets have been compared between themselves as well as with the theoretical predictions of the SC3 and convergent close coupling (CCC) calculations. This work represents a joint experimental and theoretical approach to the investigation of PDI of atomic systems with more than two electrons.

MiniBooNE Oscillation Results

International Nuclear Information System (INIS)

Djurcic, Zelimir

2009-01-01

These proceedings summarize the MiniBooNE ν μ → ν e results, describe the first (bar ν) μ → (bar ν) e result, and current analysis effort with the NuMI neutrinos detected in the miniBooNE detector

Search for low lying dipole strength in the neutron rich nucleus Ne{sup 26}

Energy Technology Data Exchange (ETDEWEB)

Gibelin, J

2005-11-15

We carried out the Coulomb excitation, on a lead target, of an exotic beam of neutron-rich nucleus Ne{sup 26} at 58 MeV/n, in order to study the possible existence of a pygmy dipole resonance above the neutron emission threshold. The experiment was performed at the Riken Research Facility, in Tokyo (Japan) and included a gamma-ray detector, a charged fragment hodoscope and a neutron detector. Using the invariant mass method in the Ne{sup 25} + n decay channel, and by comparing the reaction cross section on the lead target and a light target of aluminum, we observe a sizable amount of E1 strength between the one neutron and the two neutron emission thresholds. The corresponding Ne{sup 26} angular distribution confirms its nature and we deduce its reduced dipole transition probability value of B(E1) = 0.54 {+-} 0.18 e{sup 2}fm{sup 2}. Our method also enables us to extract for the first time the decay pattern of a pygmy resonance. By detecting the decay photons from the excited states below the neutron emission threshold and by analyzing the angular distribution of the inelastically scattered Ne{sup 26} we deduce the reduced transition probability of the first 2{sup +} state, from the ground state. The value obtained of B(E2) = 87 {+-} 13 e{sup 2}fm{sup 4} being in disagreement with a previous result. (author)

Neutrino-nucleus neutral current elastic interactions measurement in MiniBooNE

Science.gov (United States)

Perevalov, Denis

The MiniBooNE experiment at the Fermi National Accelerator Laboratory (Fermilab) was designed to search for numu → nu e neutrino oscillations at Deltam 2 ˜ 1 eV2 using an intense neutrino flux with an average energy Enu ˜ 700 MeV. From 2002 to 2009 MiniBooNE has accumulated more than 1.0x1021 protons on target (POT) in both neutrino and antineutrino modes. MiniBooNE provides a perfect platform for detailed measurements of exclusive and semi-inclusive neutrino cross-sections, for which MiniBooNE has the largest samples of events up to date, such as neutral current elastic (NCE), neutral current pi 0, charged current quasi-elastic (CCQE), charged current pi +, and other channels. These measured cross-sections, in turn, allow to improve the knowledge of nucleon structure. This thesis is devoted to the study of NCE interactions. Neutrino-nucleus neutral current elastic scattering (nuN → nu N) accounts for about 18% of all neutrino interactions in MiniBooNE. Using a high-statistics, high purity sample of NCE interactions in MiniBooNE, the flux-averaged NCE differential cross-section has been measured and is being reported here. Further study of the NCE cross-section allowed for probing the structure of nuclei. The main interest in the NCE cross-section is that it may be sensitive to the strange quark contribution to the nucleon spin, Deltas, this however requires a separation of NCE proton (nup → nu p) from NCE neutron (nun → nun ) events, which in general is a challenging task. MiniBooNE uses a Cherenkov detector, which imposes restrictions on the measured nucleon kinematic variables, mainly due to the impossibility to reconstruct the nucleon direction below the Cherenkov threshold. However, at kinetic energies above this threshold MiniBooNE is able to identify NCE proton events that do not experience final state interactions (FSI). These events were used for the Deltas measurement. In this thesis MiniBooNE reports the NCE (n+p) cross-section, the measurement

Photoproton cross section for /sup 19/F

Energy Technology Data Exchange (ETDEWEB)

Tsubota, H [Tohoku Univ., Sendai (Japan). Coll. of General Education; Kawamura, N; Oikawa, S; Uegaki, J I

1975-02-01

Proton energy spectra have been measured at 90/sup 0/ for the /sup 19/F(e,e'p)/sup 18/O reaction in the giant resonance region. The (..gamma..,p/sub 0/) and (..gamma..,p/sub 1/) differential cross sections are extracted from the proton energy spectra by using virtual-photon spectra. The integrated differential cross section of the (..gamma..,p/sub 0/) and (..gamma..,p/sub 1/) reactions are 1.80+-0.27 and 0.50+-0.45 MeV-mb/sr, respectively. The results are discussed with the shell model theory by comparing with the (..gamma..,p/sub 0/) cross section of the neighboring 4n-nucleus /sup 20/Ne. A significant increase of the proton yield leaving the non-ground states is found at 25 MeV of the incident electron energy. This is discussed in terms of the core excitation effect.

Nuclear breakup of 17Ne and its two-proton halo structure

Energy Technology Data Exchange (ETDEWEB)

Wamers, Felix; Aumann, Thomas [Institut fuer Kernphysik, TU Darmstadt (Germany); Bertulani, Carlos [Texas A and M University-Commerce, Commerce (United States); Chulkov, Leonid; Heil, Michael; Simon, Haik [Kernreaktionen und Nukleare Astrophysik, GSI, Darmstadt (Germany); Marganiec, Justyna [Extreme Matter Institute, GSI, Darmstadt (Germany); JINA, Notre Dame (United States); Plag, Ralf [Kernreaktionen und Nukleare Astrophysik, GSI, Darmstadt (Germany); Goethe Universitaet, Frankfurt am Main (Germany); Collaboration: R3B-Collaboration

2012-07-01

{sup 17}Ne is a proton-dripline nucleus that has raised interest in nuclear-structure physics in recent years. As a ({sup 15}O+2p) Borromean 3-body system, it is often considered to be a 2-proton-halo nucleus, yet lacking concluding experimental quantification of structure. We have studied breakup reactions of 500 AMeV {sup 17}Ne secondary beams in inverse kinematics using the R3B-LAND setup at GSI. The foci were on (p,2p) quasi-free scattering on a CH{sub 2} target, and on one-proton-knockout reactions on a carbon target. Recoil protons have been detected with Si-Strip detectors and a surrounding 4{pi} NaI spectrometer. Furthermore, projectile-like forward protons after one-proton knockout from {sup 17}Ne have been measured in coincidence with the {sup 15}O residual core. The resulting relative-energy spectrum of the unbound {sup 16}F, as well as proton-removal cross sections with CH{sub 2} and C targets, and the transverse-momentum distributions of the residual fragments are presented. Conclusions on the ground-state structure of {sup 17}Ne are discussed.

Energy-Transfer Kinetics for Xe (6p[1/2]0) Atoms in Kr, Ar, Ne, and He.

Science.gov (United States)

He, Shan; Liu, Dong; Li, Xueyang; Chu, Junzhi; Guo, Jingwei; Liu, Jinbo; Hu, Shu; Sang, Fengting; Jin, Yuqi

2018-06-11

The kinetic processes for the Xe (6p[1/2] 0 ) atoms in Kr, Ar, Ne, and He buffer gases were studied. We found that Kr, Ar, and Ne atoms can be used to switch the amplified spontaneous emission (ASE) channel from 3408 nm (6p[1/2] 0 -6s'[1/2] 1 ) to 3680 nm (5d[1/2] 1 -6p[1/2] 1 ), while Xe and He atoms do not show such a phenomenon. This ASE channel switch is mainly ascribed to the fast transfer of 6p[1/2] 0 → 5d[1/2] 1 . On the basis of the rate equations for two-state coupling (energy-transfer processes between the two states are very rapid), the reason why the ASE channel switch effect normally coincides with a double exponential decay of the spontaneous emission at 828 nm (6p[1/2] 0 -6s[3/2] 1 ) is explained. The actual situations in Xe, Ar, Ne, and He follow this rule. However, the strictly single exponential decay of the spontaneous emission at 828 nm and strong ASE channel switch effect simultaneously emerge in Kr. This indicates that the transfer of 6p[1/2] 0 → 5d[1/2] 1 in Kr does not occur via two-state coupling, but via two steps of near-resonance collision through the 5s[3/2] 2 (Kr) state as the intermediate state (6p[1/2] 0 → 5s[3/2] 2 (Kr) → 5d[1/2] 1 ). In addition, we found Xe (6p[1/2] 0 ) atoms strongly tend to reach the 6p[3/2] 2 , 6p[3/2] 1 , and 6p[5/2] 2 states through the 5s[3/2] 2 (Kr) state as the intermediate state in Kr. The 5s[3/2] 2 (Kr) state plays a very important role in the energy-transfer kinetics for the Xe (6p[1/2] 0 ) atoms. Kr is probably an excellent buffer gas for laser systems based on Xe.

Reflections on the introduction of fast breeder reactors in the DeBeNeLux states

International Nuclear Information System (INIS)

Schroeder, R.; Wagner, J.

1975-06-01

This report gives a survey of the impact of introducing sodium-cooled fast breeder reactors in the Federal Republic of Germany and the BeNeLux countries (DeBeNeLux region). The supply situation with respect to electric and thermal energy is studied in particular, together with aspects of economy and environmental impact. The potential and consequences of a breeder economy, the present status and future r+d work are discussed. In addition to sodium-cooled fast breeder reactors with oxide or carbide fuel, alternative solutions are touched: 1) light water and high temperature reactors, 2) helium-cooled fast breeder reactors, 3) geothermal energy, solar energy and fusion energy. (orig.) [de

UCB-NE-107 user's manual

International Nuclear Information System (INIS)

Lee, W.W.L.

1989-03-01

The purpose of this manual is to provide users of UCB-NE-107 with the information necessary to use UCB-NE-107 effectively. UCB-NE-107 is a computer code for calculating the fractional rate of readily soluble radionuclides that are released from nuclear waste emplaced in water-saturated porous media. Waste placed in such environments will gradually dissolve. For many species such as actinides and rare earths, the process of dissolution is governed by the exterior flow field, and the chemical reaction rate or leaching rate. However, for readily soluble species such as 135 Cs, 137 Cs, and 129 I, it has been observed that their dissolution rates are rapid. UCB-NE-107 is a code for calculating the release rate at the waste/rock interface, to check compliance with the US Nuclear Regulatory Commission's (USNRC) subsystem performance objective. It is an implementation of the analytic solution given below. 5 refs., 2 figs

National and state vaccination coverage among children aged 19-35 months--United States, 2010.

Science.gov (United States)

2011-09-02

The National Immunization Survey (NIS) monitors vaccination coverage among children aged 19-35 months using a random-digit-dialed sample of telephone numbers of households to evaluate childhood immunization programs in the United States. This report describes the 2010 NIS coverage estimates for children born during January 2007-July 2009. Nationally, vaccination coverage increased in 2010 compared with 2009 for ≥ 1 dose of measles, mumps, and rubella vaccine (MMR), from 90.0% to 91.5%; ≥ 4 doses of pneumococcal conjugate vaccine (PCV), from 80.4% to 83.3%; the birth dose of hepatitis B vaccine (HepB), from 60.8% to 64.1%; ≥ 2 doses of hepatitis A vaccine (HepA), from 46.6% to 49.7%; rotavirus vaccine, from 43.9% to 59.2%; and the full series of Haemophilus influenzae type b (Hib) vaccine, from 54.8% to 66.8%. Coverage for poliovirus vaccine (93.3%), MMR (91.5%), ≥ 3 doses HepB (91.8%), and varicella vaccine (90.4%) continued to be at or above the national health objective targets of 90% for these vaccines.* The percentage of children who had not received any vaccinations remained low (poverty status still exist. Maintaining high vaccination coverage levels is important to reduce the burden of vaccine-preventable diseases and prevent a resurgence of these diseases in the United States, particularly in undervaccinated populations.

Divergences in hydraulic architecture form an important basis for niche differentiation between diploid and polyploid Betula species in NE China.

Science.gov (United States)

Zhang, Wei-Wei; Song, Jia; Wang, Miao; Liu, Yan-Yan; Li, Na; Zhang, Yong-Jiang; Holbrook, N Michele; Hao, Guang-You

2017-05-01

Habitat differentiation between polyploid and diploid plants are frequently observed, with polyploids usually occupying more stressed environments. In woody plants, polyploidization can greatly affect wood characteristics but knowledge of its influences on xylem hydraulics is scarce. The four Betula species in NE China, representing two diploids and two polyploids with obvious habitat differentiation, provide an exceptional study system for investigating the impact of polyploidization on environmental adaptation of trees from the point view of xylem hydraulics. To test the hypothesis that changes in hydraulic architecture play an important role in determining their niche differentiation, we measured wood structural traits at both the tissue and pit levels and quantified xylem water transport efficiency and safety in these species. The two polyploids had significantly larger hydraulic weighted mean vessel diameters than the two diploids (45.1 and 45.5 vs 25.9 and 24.5 μm) although the polyploids are occupying more stressed environments. As indicated by more negative water potentials corresponding to 50% loss of stem hydraulic conductivities, the two polyploids exhibited significantly higher resistance to drought-induced embolism than the two diploids (-5.23 and -5.05 vs -3.86 and -3.13 MPa) despite their larger vessel diameters. This seeming discrepancy is reconciled by distinct characteristics favoring greater embolism resistance at the pit level in the two polyploid species. Our results showed clearly that the two polyploid species have remarkably different pit-level anatomical traits favoring greater hydraulic safety than their congeneric diploid species, which have likely contributed to the abundance of polyploid birches in more stressed habitats; however, less porous inter-conduit pits together with a reduced leaf to sapwood area may have compromised their competitiveness under more favorable conditions. Contrasts in hydraulic architecture between diploid and

The parasite Ichthyophonus sp. in Pacific herring from the coastal NE Pacific.

Science.gov (United States)

Hershberger, P K; Gregg, J L; Hart, L M; Moffitt, S; Brenner, R; Stick, K; Coonradt, E; Otis, E O; Vollenweider, J J; Garver, K A; Lovy, J; Meyers, T R

2016-04-01

The protistan parasite Ichthyophonus occurred in populations of Pacific herring Clupea pallasii Valenciennes throughout coastal areas of the NE Pacific, ranging from Puget Sound, WA north to the Gulf of Alaska, AK. Infection prevalence in local Pacific herring stocks varied seasonally and annually, and a general pattern of increasing prevalence with host size and/or age persisted throughout the NE Pacific. An exception to this zoographic pattern occurred among a group of juvenile, age 1+ year Pacific herring from Cordova Harbor, AK in June 2010, which demonstrated an unusually high infection prevalence of 35%. Reasons for this anomaly were hypothesized to involve anthropogenic influences that resulted in locally elevated infection pressures. Interannual declines in infection prevalence from some populations (e.g. Lower Cook Inlet, AK; from 20-32% in 2007 to 0-3% during 2009-13) or from the largest size cohorts of other populations (e.g. Sitka Sound, AK; from 62.5% in 2007 to 19.6% in 2013) were likely a reflection of selective mortality among the infected cohorts. All available information for Ichthyophonus in the NE Pacific, including broad geographic range, low host specificity and presence in archived Pacific herring tissue samples dating to the 1980s, indicate a long-standing host-pathogen relationship. © 2015 John Wiley & Sons Ltd.

Current Status of the MiniBooNE Experiment

OpenAIRE

Ray, H.; collaboration, for the MiniBooNE

2004-01-01

MiniBooNE is an experiment designed to refute or confirm the LSND anti-nu_mu -> anti-nu_e oscillation result. MiniBooNE will look for oscillations of nu_mu -> nu_e in a closed-box appearance analysis. MiniBooNE began collecting data in 2002, and is expected to continue data taking through 2005. Current MiniBooNE results are presented.

Performance Analysis of Different NeQuick Ionospheric Model Parameters

Directory of Open Access Journals (Sweden)

WANG Ningbo

2017-04-01

Full Text Available Galileo adopts NeQuick model for single-frequency ionospheric delay corrections. For the standard operation of Galileo, NeQuick model is driven by the effective ionization level parameter Az instead of the solar activity level index, and the three broadcast ionospheric coefficients are determined by a second-polynomial through fitting the Az values estimated from globally distributed Galileo Sensor Stations (GSS. In this study, the processing strategies for the estimation of NeQuick ionospheric coefficients are discussed and the characteristics of the NeQuick coefficients are also analyzed. The accuracy of Global Position System (GPS broadcast Klobuchar, original NeQuick2 and fitted NeQuickC as well as Galileo broadcast NeQuickG models is evaluated over the continental and oceanic regions, respectively, in comparison with the ionospheric total electron content (TEC provided by global ionospheric maps (GIM, GPS test stations and JASON-2 altimeter. The results show that NeQuickG can mitigate ionospheric delay by 54.2%~65.8% on a global scale, and NeQuickC can correct for 71.1%~74.2% of the ionospheric delay. NeQuick2 performs at the same level with NeQuickG, which is a bit better than that of GPS broadcast Klobuchar model.

Ion mobilities in Xe/Ne and other rare-gas mixtures

Energy Technology Data Exchange (ETDEWEB)

Piscitelli, D; Pitchford, L C [Centre de Physique des Plasmas et Applications de Toulouse (CPAT), UMR 5002 CNRS, 118 route de Narbonne, 31062 Toulouse (France); Phelps, A V [JILA, University of Colorado and National Institute of Technology, Boulder, Colorado (United States); Urquijo, J de [Centro de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Post Office Box 48-3, 62251, 80309-0440 Cuernavaca, Moreno (Mexico); Basurto, E [Departmento de Ciencias Basicas, Universidad Autonoma Metropolitana, 02200 Mexico Distrito Federal (Mexico)

2003-10-01

The ion mobility or drift velocity data important for modeling glow discharges in rare gas mixtures are not generally available, nor are the ion-neutral scattering cross sections needed to calculate these data. In this paper we propose a set of cross sections for Xe{sup +} and Ne{sup +} collisions with Xe and Ne atoms. Ion mobilities at 300 K calculated using this cross section set in a Monte Carlo simulation are reported for reduced field strengths, E/N, up to 1500x10{sup -21} V m{sup 2}, in pure gases and in Xe/Ne mixtures containing 5% and 20% Xe/Ne, which are mixtures of interest for plasma display panels (PDPs). The calculated Xe{sup +} mobilities depend strongly on the mixture composition, but the Ne{sup +} mobility varies only slightly with increasing Xe in the mixture over the range studied here. The mobilities in pure gases compare well with available experimental values, and mobilities in gas mixtures at low E/N compare well with our recent measurements which will be published separately. Results from these calculations of ion mobilities are used to evaluate the predictions of Blanc's law and of the mixture rule proposed by Mason and Hahn [Phys. Rev. A 5, 438 (1972)] for determining the ion mobilities in mixtures from a knowledge of the mobilities in each of the pure gases. The mixture rule of Mason and Hahn is accurate to better than 10% at high field strengths over a wide range of conditions of interest for modeling PDPs. We conclude that a good estimate of ion mobilities at high E/N in Xe/Ne and other binary rare gas mixtures can be obtained using this mixture rule combined with known values of mobilities in parent gases and with the Langevin form for mobility of rare gas ions ion in other gases. This conclusion is supported by results in Ar/Ne mixtures which are also presented here.

Lääne-Virumaa TOP 100 aastal 2000

Index Scriptorium Estoniae

2001-01-01

Lääne-Virumaa edukamad ettevõtted; Lääne-Virumaa käibe TOP 100; Käibe kasvu TOP 20; Käibe languse TOP 10; Kasumi TOP 20; Kasumi kasvu TOP 20; Rentabluse TOP 20; ROA TOP 20; Kasumi languse TOP 10; Kahjumi TOP 10; Lääne-Virumaa käibelt suuremate ettevõtete finantsandmed. Lääne-Virumaa ettevõtete üldandmed

Restaurant closure for the Jeûne genevois

CERN Multimedia

2007-01-01

Restaurant 1 will be closed on Thursday 6th September (Jeûne Genevois) as well as Friday 7th, Saturday 8th and Sunday 9th September for technical reasons. During this time, Restaurant 2 will be open at the following times: –\tThursday 6th September: 9:00 – 20:00 –\tFriday 7th September: 8:00 – 20:00 –\tSaturday 8th and Sunday 9th September: 9:00–20:00 Hot meals will be served on all 4 days from 12:00 to 14:00 and from 18:00 to 19:30. For more information please see http://cern.ch/restaurant2 Thank you for your understanding.

A quantum-rovibrational-state-selected study of the proton-transfer reaction H2+(X2Σ: v+ = 1-3; N+ = 0-3) + Ne → NeH+ + H using the pulsed field ionization-photoion method: observation of the rotational effect near the reaction threshold.

Science.gov (United States)

Xiong, Bo; Chang, Yih-Chung; Ng, Cheuk-Yiu

2017-07-19

Using the sequential electric field pulsing scheme for vacuum ultraviolet (VUV) laser pulsed field ionization-photoion (PFI-PI) detection, we have successfully prepared H 2 + (X 2 Σ: v + = 1-3; N + = 0-5) ions in the form of an ion beam in single quantum-rovibrational-states with high purity, high intensity, and narrow laboratory kinetic energy spread (ΔE lab ≈ 0.05 eV). This VUV-PFI-PI ion source, when coupled with the double-quadrupole double-octupole ion-molecule reaction apparatus, has made possible a systematic examination of the vibrational- as well as rotational-state effects on the proton transfer reaction of H 2 + (X 2 Σ: v + ; N + ) + Ne. Here, we present the integral cross sections [σ(v + ; N + )'s] for the H 2 + (v + = 1-3; N + = 0-3) + Ne → NeH + + H reaction observed in the center-of-mass kinetic energy (E cm ) range of 0.05-2.00 eV. The σ(v + = 1, N + = 1) exhibits a distinct E cm onset, which is found to agree with the endothermicity of 0.27 eV for the proton transfer process after taking into account of experimental uncertainties. Strong v + -vibrational enhancements are observed for σ(v + = 1-3, N + ) in the E cm range of 0.05-2.00 eV. While rotational excitations appear to have little effect on σ(v + = 3, N + ), a careful search leads to the observation of moderate N + -rotational enhancements at v + = 2: σ(v + = 2; N + = 0) quantum dynamics predictions. We hope that these new experimental results would further motivate more rigorous theoretical calculations on the dynamics of this prototypical ion-molecule reaction.

Neutrino-nucleus neutral current elastic interactions measurement in MiniBooNE

Energy Technology Data Exchange (ETDEWEB)

Perevalov, Denis [Univ. of Alabama, Tuscaloosa, AL (United States)

2009-12-01

The MiniBooNE experiment at the Fermi National Accelerator Laboratory (Fermilab) was designed to search for v_μ → v_e neutrino oscillations at Δm² ~ 1 eV² using an intense neutrino flux with an average energy E_v ~ 700 MeV. From 2002 to 2009 MiniBooNE has accumulated more than 1.0 x 10²¹ protons on target (POT) in both neutrino and antineutrino modes. MiniBooNE provides a perfect platform for detailed measurements of exclusive and semiinclusive neutrino cross-sections, for which MiniBooNE has the largest samples of events up to date, such as neutral current elastic (NCE), neutral current π⁰, charged current quasi-elastic (CCQE), charged current π⁺, and other channels. These measured cross-sections, in turn, allow to improve the knowledge of nucleon structure. This thesis is devoted to the study of NCE interactions. Neutrino-nucleus neutral current elastic scattering (vN → vN) accounts for about 18% of all neutrino interactions in MiniBooNE. Using a high-statistics, high purity sample of NCE interactions in MiniBooNE, the flux-averaged NCE differential cross-section has been measured and is being reported here. Further study of the NCE cross-section allowed for probing the structure of nuclei. The main interest in the NCE cross-section is that it may be sensitive to the strange quark contribution to the nucleon spin, Δs, this however requires a separation of NCE proton (vp → vp) from NCE neutron (vn → vn) events, which in general is a challenging task. MiniBooNE uses a Cherenkov detector, which imposes restrictions on the measured nucleon kinematic variables, mainly due to the impossibility to reconstruct the nucleon direction below the Cherenkov threshold. However, at kinetic energies above this threshold MiniBooNE is able to identify NCE proton events that do not experience final state interactions (FSI). These events were used for the Δs measurement. In this thesis

A 19-state R-matrix investigation of resonances in e--He scattering at low energies. Pt. 4

International Nuclear Information System (INIS)

Fon, W.C.; Lim, K.P.

1993-01-01

The authors have previously reported the 11-state and 19-state R-matrix calculations of 1 1 S-2 3,1 S and 1 1 S-2 3 P differential cross sections at low energies. In this paper, the same R-matrix calculations are extended to obtain the differential cross sections and the electron-photon coincidence parameters λ and |Χ| for the excitation of the ground state helium to the 2 1 P state. Convergence studies are carried out between the 11-state and 19-state R-matrix calculations. Only the 19-state R-matrix results are presented in full at scattering angles of 20 o , 30 o , 60 o , 90 o , 120 o and 140 o from the excitation threshold up to 23.8 eV. (author)

Calibration of detectors type CR-39 for methodology implementation for Radon-222 determination in CRCN-NE, Brazil

International Nuclear Information System (INIS)

Silva, Karolayne E.M. da; Santos, Mariana L. de O.; Amaral, Déric S. do; Vilela, Eldice C.; França, Elvis J. de; Hazin, Clovis A.; Farias, Emerson E.G. de

2017-01-01

Radon-222 is a radioactive gas, a product of the decay of uranium-238, which emits alpha particles and represents more than 50% of the dose of natural radiation received by the population. Therefore, monitoring of this gas is essential. For indoor measurement, solid state detectors can be used, the most common of which is CR-39. For monitoring using CR-39, alpha particles, generated by radon-222 and the daughter radionuclides, strike the surface of the detector and generate traces. To relate the trace density per exposure area in environments with unknown activity concentration, it is necessary to determine the calibration factor. The objective of this study was to calibrate CR-39 type detectors for the implementation of the radon determination methodology in Centro Regional de Ciencias Nucleares do Nordeste - CRCN-NE of Brazilian Nuclear Energy Commission - CNEN. In order to determine the CR-39 calibration factor, 19 exposures of the detectors were performed in the CRCN-NE calibration chamber (RN1-CRCN) at an activity of 5.00 kBq m -3 , with the exposure time varying from 24 to 850 hours. For the detection of the detectors, sodium hydroxide was used in a thermostat bath at 90 ° C for 5 hours. The count of number of traits per unit of field was performed with the aid of optical microscopy with an increase of 100 times, being read 30 fields per dosimeters. As a result, the calibration factor was obtained, and the linear response of the trace density as a function of exposure was observed. The results allow the use of CR-39 in the determination of radon-222 by CRCN-NE

19 CFR 210.22 - [Reserved

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false [Reserved] 210.22 Section 210.22 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Motions § 210.22 [Reserved] ...

The DAΦNE cryogenic system

International Nuclear Information System (INIS)

Modena, M.

1997-12-01

The DAΦNE Project utilises superconductivity technology for a total of six superconducting magnets: the two Experiment magnets (KLOE and FINUDA) and the four Compensator Solenoid magnets needed to compensate the magnetic effect of the Experiment magnets on the electron and positron beams. This effect, on beams of 510 MeV (nominal DAΦNE Energy), is expected to be relevant, especially with the aim of achieving a very high luminosity, which is the main target of the Project. The KLOE superconducting magnet has two possible working positions: the first in the DAΦNE Hall, when the Experiment will be in operation, and the second one in the KLOE Assembly Hall. This second position is the first to be utilised for the KLOE magnet Acceptance Test and magnetic field mapping, prior to the mounting of all the experimental apparatus inside the magnet. This note intends to present the DAΦNE Cryogenic System and how the authors have converged to the definition of a common Cryogenic System compatible with all the six superconducting magnets

NeXOS, developing and evaluating a new generation of insitu ocean observation systems.

Science.gov (United States)

Delory, Eric; del Rio, Joaquin; Golmen, Lars; Roar Hareide, Nils; Pearlman, Jay; Rolin, Jean-Francois; Waldmann, Christoph; Zielinski, Oliver

2017-04-01

Ocean biological, chemical or physical processes occur over widely varying scales in space and time: from micro- to kilometer scales, from less than seconds to centuries. While space systems supply important data and information, insitu data is necessary for comprehensive modeling and forecasting of ocean dynamics. Yet, collection of in-situ observation on these scales is inherently challenging and remains generally difficult and costly in time and resources. This paper address the innovations and significant developments for a new generation of insitu sensors in FP7 European Union project "Next generation, Cost- effective, Compact, Multifunctional Web Enabled Ocean Sensor Systems Empowering Marine, Maritime and Fisheries Management" or "NeXOS" for short. Optical and acoustics sensors are the focus of NeXOS but NeXOS moves beyond just sensors as systems that simultaneously address multiple objectives and applications are becoming increasingly important. Thus NeXOS takes a perspective of both sensors and sensor systems with significant advantages over existing observing capabilities via the implementation of innovations such as multiplatform integration, greater reliability through better antifouling management and greater sensor and data interoperability through use of OGC standards. This presentation will address the sensor system development and field-testing of the new NeXOS sensor systems. This is being done on multiple platforms including profiling floats, gliders, ships, buoys and subsea stations. The implementation of a data system based on SWE and PUCK furthers interoperability across measurements and platforms. This presentation will review the sensor system capabilities, the status of field tests and recommendations for long-term ocean monitoring.

L'hydrogène Hydrogen

Directory of Open Access Journals (Sweden)

Balaceanu J. C.

2006-11-01

techniques with regard to its widespread use. Such techniques include solici storage facilities, high-efficiency turbines and fuel cells opening up such fields as traction and electric power for isolated installations. Hydrogen fis an active and powerful reducing agent that can aiso be substituted for conventional reducers in the field of metallurgy so as to give a new dimension to both dry and wet hydrogenometallurgy. Yet even more important, its action can be used to economically valorize abundant fossil fuels such as cool, shale cil and tar Bands by transforming them in a fluid state into synthetic natural gas or synthesis cils. There fis some talk of the quick advent of a « hydrogen civilization », apparently with some reason, unless there fis a change in the cost of cil (its technical cost represents only a few percent of its actual colt. Economically and for just a few decades, such a change would have far-reaching repercussions on the gigantic industrial, technical and scientific investments that are involved in implementing this new fuel, especially in the nuclear field.

Nuclear structure calculations in $^{20}$Ne with No-Core Configuration-Interaction model

OpenAIRE

Konieczka, Maciej; Satuła, Wojciech

2016-01-01

Negative parity states in $^{20}$Ne and Gamow-Teller strength distribution for the ground-state beta-decay of $^{20}$Na are calculated for the very first time using recently developed No-Core Configuration-Interaction model. The approach is based on multi-reference density functional theory involving isospin and angular-momentum projections. Advantages and shortcomings of the method are briefly discussed.

[p,q] {ne} i{Dirac_h}

Energy Technology Data Exchange (ETDEWEB)

Costella, J P

1995-05-22

In this short note, it is argued that [p, q] {ne} i{Dirac_h}, contrary to the oiginal claims of Born and Jordan, and Dirac. Rather, [p, q] is equal to something that is infinitesimally different from i{Dirac_h}. While this difference is usually harmless, it does provide the solution of the Born-Jordan `trace paradox` of [p, q]. More recently, subtleties of a very similar form have been found to be of fundamental importance in quantum field theory. 3 refs.

Absorbed dose to water comparison between NE 2561 and NE 2671 chambers using IAEA, HPA and NACP protocols for gamma ray beam

International Nuclear Information System (INIS)

Mohd Taufik Dolah; Noriah Mod Ali; Taiman Kadni

2002-01-01

The aim of this study to evaluate the performance of NE 2571 chamber in comparison with NE 2561 chamber in determination of the absorbed dose to water in gamma ray beam. In this study NE 2561 is taking as a reference standard chamber while NE 2571 as a working standard. Irradiation of chamber (alternately) was performed at a reference depth, 5 cm, inside the IAEA water phantom. Both chambers were exposed to 13 difference exposures of gamma rays. The values of absorbed dose to water were then determined using IAEA, HPA and NACP protocols. Deviations of absorbed dose determined by NE 2561 and NE 2571 were calculated for each protocol. result obtained in terms of [protocol, μ (mean deviation) ± σ s e (standard error)] were (IAEA, 1.12 ± 0.04], [HPA, 0.09 ± 0.04], and [NCP, 0.09 ± 0.04]. It can be concluded that NE 2571 shown acceptable performance as it is within acceptable limit ± 3%. (Author)

The parasite Ichthyophonus sp. in Pacific herring from the coastal NE Pacific

Science.gov (United States)

Hershberger, Paul K.; Gregg, Jacob L.; Hart, Lucas M.; Moffitt, Steve; Brenner, Richard L.; Stick, K.; Coonradt, Eric; Otis, E. O.; Vollenweider, Johanna J.; Garver, Kyle A.; Lovy, Jan; Meyers, T.R.

2016-01-01

The protistan parasite Ichthyophonus occurred in populations of Pacific herring Clupea pallasii Valenciennes throughout coastal areas of the NE Pacific, ranging from Puget Sound, WA north to the Gulf of Alaska, AK. Infection prevalence in local Pacific herring stocks varied seasonally and annually, and a general pattern of increasing prevalence with host size and/or age persisted throughout the NE Pacific. An exception to this zoographic pattern occurred among a group of juvenile, age 1+ year Pacific herring from Cordova Harbor, AK in June 2010, which demonstrated an unusually high infection prevalence of 35%. Reasons for this anomaly were hypothesized to involve anthropogenic influences that resulted in locally elevated infection pressures. Interannual declines in infection prevalence from some populations (e.g. Lower Cook Inlet, AK; from 20–32% in 2007 to 0–3% during 2009–13) or from the largest size cohorts of other populations (e.g. Sitka Sound, AK; from 62.5% in 2007 to 19.6% in 2013) were likely a reflection of selective mortality among the infected cohorts. All available information for Ichthyophonus in the NE Pacific, including broad geographic range, low host specificity and presence in archived Pacific herring tissue samples dating to the 1980s, indicate a long-standing host–pathogen relationship.

Strategic Plan for Nuclear Energy -- Knowledge Base for Advanced Modeling and Simulation (NE-KAMS)

Energy Technology Data Exchange (ETDEWEB)

Kimberlyn C. Mousseau

2011-10-01

The Nuclear Energy Computational Fluid Dynamics Advanced Modeling and Simulation (NE-CAMS) system is being developed at the Idaho National Laboratory (INL) in collaboration with Bettis Laboratory, Sandia National Laboratory (SNL), Argonne National Laboratory (ANL), Utah State University (USU), and other interested parties with the objective of developing and implementing a comprehensive and readily accessible data and information management system for computational fluid dynamics (CFD) verification and validation (V&V) in support of nuclear energy systems design and safety analysis. The two key objectives of the NE-CAMS effort are to identify, collect, assess, store and maintain high resolution and high quality experimental data and related expert knowledge (metadata) for use in CFD V&V assessments specific to the nuclear energy field and to establish a working relationship with the U.S. Nuclear Regulatory Commission (NRC) to develop a CFD V&V database, including benchmark cases, that addresses and supports the associated NRC regulations and policies on the use of CFD analysis. In particular, the NE-CAMS system will support the Department of Energy Office of Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program, which aims to develop and deploy advanced modeling and simulation methods and computational tools for reliable numerical simulation of nuclear reactor systems for design and safety analysis. Primary NE-CAMS Elements There are four primary elements of the NE-CAMS knowledge base designed to support computer modeling and simulation in the nuclear energy arena as listed below. Element 1. The database will contain experimental data that can be used for CFD validation that is relevant to nuclear reactor and plant processes, particularly those important to the nuclear industry and the NRC. Element 2. Qualification standards for data evaluation and classification will be incorporated and applied such that validation data sets will result in well

Electron capture on 20Ne and the ultimate fate of stars in the mass range 8-10 M⊙

International Nuclear Information System (INIS)

Kirsebom, Oliver S.; Cederkall, Joakim; Jenkins, David G.; Joshi, Pankaj; Julin, Rauno; Kankainen, Anu; Trzaska, Wladyslaw H.; Kibedi, Tibor; Tengblad, Olof

2016-01-01

Knowledge of the electron-capture rate on 20 Ne is of critical importance to understand the final evolution of stars in the mass range 8-10M⊙. A recent study has highlighted the importance of the second-forbidden transition between the ground states of 20 Ne and 20 F, which is believed to dominate the capture rate in an important temperature-density range. The strength of this transition is, however, not well constrained, neither experimentally nor theoretically, making an experimental determination highly desirable. The transition strength can be determined from the branching ratio of the inverse transition in the decay of 20 F, for which the experimental upper limit is 10 -5 , while the most recent theoretical prediction is 1.3 x 10 -6 . To facilitate an experimental determination of the branching ratio we are refurbishing an intermediate-image magnetic spectrometer capable of focusing 7 MeV electrons, and designing a scintillator detector surrounded by an active cosmic-ray veto shield, which will serve as an energy- dispersive device at the focal plane. In this contribution, GEANT4 simulations of the expected performance of the setup will be presented and the astrophysical motivation for the experiment will be discussed. (author)

Systematic of fusion incompleteness in 20Ne induced reactions at energy 4-7 MeV/nucleon

International Nuclear Information System (INIS)

Ali, Sabir; Ahmad, Tauseef; Kumar, Kamal

2016-01-01

In the present work, a study of fusion incompleteness using the 20 Ne projectile over 51 V, 55 Mn and 59 Co and targets has been carried out. The experiment involving 20 N e+ 51 V system was performed at VECC, Kolkata, India. The targets of thickness range 1.19-1.50 rug/cm 2 of spectroscopically pure 51 V (purity 99.99%) were prepared by depositing on aluminum backing of thickness range 1.47-1.64 mg/cm 2 by the vacuum evaporation technique at the target lab of VECC. A stack of six 51 V targets was irradiated for ≈ 11 hrs by 20 Ne 6+ beam at ≈145 MeV. The irradiation of the stack covered the desired energy range of 82-145 MeV. The beam current was ≈ 40 nA during the irradiation hours. The energy of the 20 Ne ion beam incident on each target foil was calculated using stopping power software SRIM. The overall error in the present work is estimated to be ≤20%

Observation of a low-lying neutron-unbound state in 19C

International Nuclear Information System (INIS)

Thoennessen, M.; Mosby, S.; Badger, N.S.; Baumann, T.; Bazin, D.; Bennett, M.; Brown, J.; Christian, G.; DeYoung, P.A.; Finck, J.E.; Gardner, M.; Hook, E.A.; Luther, B.; Meyer, D.A.; Mosby, M.; Rogers, W.F.

2013-01-01

Proton removal reactions from a secondary 22 N beam were utilized to populate unbound states in neutron-rich carbon isotopes. Neutrons were measured with the Modular Neutron Array (MoNA) in coincidence with carbon fragments. A resonance with a decay energy of 76(14) keV was observed in the system 18 C+n corresponding to a state in 19 C at an excitation energy of 653(95) keV. This resonance could correspond to the first 5/2 + state which was recently speculated to be unbound in order to describe 1n and 2n removal cross section measurements from 20 C

ETIČNE DILEME PODJETNIKA

OpenAIRE

Cvek, Tadej

2010-01-01

Etika in morala se skozi čas nenehno spreminjata in nekatere stvari, ki so danes nedovoljene, so bile še pred kratkim dovoljene in obratno. Razlog za to so predvsem družbene in kulturne spremembe, ki vodijo do drugačnih pogledov na stvari in okolico. Skladno z razvojem etike in morale, se razvijajo tudi nove etične teorije, ki še ne dosegajo starejših teorij a vendarle pridobivajo na pomembnosti in kdo ve, mogoče jih bodo kdaj v prihodnosti tudi presegle. Za MNP je pomembno, da razlikuje...

19 CFR 210.68 - Complainant's temporary relief bond.

Science.gov (United States)

2010-04-01

... Section 210.68 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.68 Complainant's temporary... by Individual Surety United States International Trade Commission Affidavit by Individual Surety 19...

Status of the KM3NeT project

International Nuclear Information System (INIS)

Katz, U.F.

2009-01-01

KM3NeT is a future research infrastructure in the Mediterranean Sea, hosting a cubic-kilometre scale neutrino telescope and nodes for associated sciences such as marine biology, oceanology and geophysics. The status of the KM3NeT project and the progress made in the EU-funded Design Study is reviewed. Some physics studies indicating the sensitivity of the KM3NeT neutrino telescope are highlighted and selected major technical design options to be further pursued are described. Finally, the remaining steps towards construction of KM3NeT will be discussed. This document reflects the status of the KM3NeT Conceptual Design Report (CDR), which has been presented to the public for the first time at the VLVnT08 Workshop.

Matrix effects in ion-induced emission as observed in Ne collisions with Cu-Mg and Cu-Al alloys

Science.gov (United States)

Ferrante, J.; Pepper, S. V.

1983-01-01

Ion induced Auger electron emission is used to study the surfaces of Al, Mg, Cu - 10 at. % Al, Cu - 19.6 at. % Al, and Cu - 7.4 at. % Mg. A neon (Ne) ion beam whose energy is varied from 0.5 to 3 keV is directed at the surface. Excitation of the lighter Ne occurs by the promotion mechanism of Barat and Lichten in asymmetric collisions with Al or Mg atoms. Two principal Auger peaks are observed in the Ne spectrum: one at 22 eV and one at 25 eV. Strong matrix effects are observed in the alloys as a function of energy in which the population of the second peak is greatly enhanced relative to the first over the pure materials. For the pure material over this energy range this ratio is 1.0. For the alloys it can rise to the electronic structure of alloys and to other surface tools such as secondary ion mass spectroscopy.

27 CFR 19.643 - Brand name, kind, alcohol content, and State of distillation.

Science.gov (United States)

2010-04-01

... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Brand name, kind, alcohol... Bottle and Label Requirements Bottle Label Requirements § 19.643 Brand name, kind, alcohol content, and State of distillation. (a) Brand name and kind. The label of distilled spirits shall state the brand...

Breaking of the neutron magic number N=20 in 32Mg and 30Ne and its possible relation to the cluster structure

International Nuclear Information System (INIS)

Kimura, Masaaki; Horiuchi, Hisashi

2002-01-01

The neutron-rich nuclei 32 Mg and 30 Ne are studied using a new version of antisymmetrized molecular dynamics (AMD). Due to the use of a deformed Gaussian as the single particle wave packet, the description of the deformation properties of Mg isotopes is drastically improved, and l·s force is accounted for more largely and sufficiently. After the angular momentum projection, 32 Mg and 30 Ne have deformed ground states, and the experimental data for 32 Mg are reproduced with reasonable accuracy. The deformation of the mean field is found to be essential to describe these nuclei. The ground states of these nuclei have neutron 2p2h structure. In 30 Ne, the cluster-like and the mean-field-like structures coexist. The ground state of 32 Mg has a mean-field-like structure. In the vicinity of the ground state, this nucleus is expected to have excited states with cluster-like structure that possesses the neutron 4p4h configuration. (author)

19 CFR 210.32 - Subpoenas.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Subpoenas. 210.32 Section 210.32 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Discovery and Compulsory Process § 210.32 Subpoenas. (a) Application for issuance...

19 CFR 210.38 - Record.

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2010-04-01

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19 CFR 210.37 - Evidence.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Evidence. 210.37 Section 210.37 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Prehearing Conferences and Hearings § 210.37 Evidence. (a) Burden of proof. The...

19 CFR 210.29 - Interrogatories.

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2010-04-01

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19 CFR 210.28 - Depositions.

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2010-04-01

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19 CFR 210.3 - Definitions.

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2010-04-01

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19 CFR 210.15 - Motions.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Motions. 210.15 Section 210.15 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Motions § 210.15 Motions. (a) Presentation and disposition. (1) During the period...

Growth of single crystals of BaFe12O19 by solid state crystal growth

International Nuclear Information System (INIS)

Fisher, John G.; Sun, Hengyang; Kook, Young-Geun; Kim, Joon-Seong; Le, Phan Gia

2016-01-01

Single crystals of BaFe 12 O 19 are grown for the first time by solid state crystal growth. Seed crystals of BaFe 12 O 19 are buried in BaFe 12 O 19 +1 wt% BaCO 3 powder, which are then pressed into pellets containing the seed crystals. During sintering, single crystals of BaFe 12 O 19 up to ∼130 μm thick in the c-axis direction grow on the seed crystals by consuming grains from the surrounding polycrystalline matrix. Scanning electron microscopy-energy dispersive spectroscopy analysis shows that the single crystal and the surrounding polycrystalline matrix have the same chemical composition. Micro-Raman scattering shows the single crystal to have the BaFe 12 O 19 structure. The optimum growth temperature is found to be 1200 °C. The single crystal growth behavior is explained using the mixed control theory of grain growth. - Highlights: • Single crystals of BaFe 12 O 19 are grown by solid state crystal growth. • A single crystal up to ∼130 μm thick (c-axis direction) grows on the seed crystal. • The single crystal and surrounding ceramic matrix have similar composition. • Micro-Raman scattering shows the single crystal has the BaFe 12 O 19 structure.

Proton capture in the nuclei 21Ne and 22Ne and its influence on the solar hydrogen burning in the neon-sodium cyclus

International Nuclear Information System (INIS)

Goerres, J.

1983-01-01

The aim of this thesis was to remove the uncertainties in the reaction rates of 21 Ne(p,γ) 22 Na and 22 Ne(p,γ) 23 Na in order to can make founded statements about the hydrogen burning in the NeNa cyclus. After the description of the experimental arrangement the search for resonances in the reaction 21 Ne(p,γ) 22 Na below Esub(p)=355 keV is reported. While the theory of the direct radiation capture is discussed the experimental results of the search for this transitions in 21 Ne(p,γ) 22 Na respectively 22 Ne(p,γ) 23 Na are presented. The astrophysical aspects of the results of this thesis are discussed and summarizingly presented. (orig./HSI) [de

Study of proton and 2 protons emission from light neutron deficient nuclei around A=20

International Nuclear Information System (INIS)

Zerguerras, T.

2001-09-01

Proton and two proton emission from light neutron deficient nuclei around A=20 have been studied. A radioactive beam of 18 Ne, 17 F and 20 Mg, produced at the Grand Accelerateur National d'Ions Lourds by fragmentation of a 24 Mg primary beam at 95 MeV/A, bombarded a 9 Be target to form unbound states. Proton(s) and nuclei from the decay were detected respectively in the MUST array and the SPEG spectrometer. From energy and angle measurements, the invariant mass of the decaying nucleus could be reconstructed. Double coincidence events between a proton and 17 F, 16 O, 15 O, 14 O and 18 Ne were registered to obtain excitation energy spectra of 18 Ne, 17 F, 16 F, 15 F et 19 Na. Generally, the masses measures are in agreement with previous experiments. In the case of 18 Ne, excitation energy and angular distributions agree well with the predictions of a break up model calculation. From 17 Ne proton coincidences, a first experimental measurement of the ground state mass excess of 18 Na has been obtained and yields 24,19(0,15)MeV. Two proton emission from 17 Ne and 18 Ne excited states and the 19 Mg ground state was studied through triple coincidences between two proton and 15 O, 16 O and 17 Ne respectively. In the first case, the proton-proton relative angle distribution in the center of mass has been compared with model calculation. Sequential emission from excited states of 17 Ne, above the proton emission threshold, through 16 F is dominant but a 2 He decay channel could not be excluded. No 2 He emission from the 1.288 MeV 17 Ne state, or from the 6.15 MeV 18 Ne state has been observed. Only one coincidence event between 17 Ne and two proton was registered, the value of the one neutron stripping reaction cross section of 20 Mg being much lower than predicted. (author)

A study of interference effects in Na(3S,3P)-Ne, Ar scattering experiments at high angular resolution

International Nuclear Information System (INIS)

Berg, F.T.M. van den.

1984-01-01

In this thesis the author presents measurements of differential cross sections for the scattering of Na-atoms in the ground-state and first excited-state by the rare gas atoms Ne and Ar. The scattering experiments were performed in a crossed-beam apparatus built and tested by van Deventer et al. The unique high angular-resolution (0.1 0 ) of this beam-scattering apparatus permits us (i) to remove the discrepancies that still exist between the various X 2 Σ- and A 2 PI-potential curves for Na-Ar and Na-Ne reported up to now, (ii) to obtain detailed information on the B 2 Σ-potentials for these systems and (iii) to demonstrate the necessity of taking into account the spin-uncoupling effects, in the interpretation of the experimental Na-Ne scattering patterns. (Auth.)

The import of the transcription factor STAT3 into mitochondria depends on GRIM-19, a component of the electron transport chain.

Science.gov (United States)

Tammineni, Prasad; Anugula, Chandrashekhar; Mohammed, Fareed; Anjaneyulu, Murari; Larner, Andrew C; Sepuri, Naresh Babu Venkata

2013-02-15

The signal transducer and activator of transcription 3 (STAT3), a nuclear transcription factor, is also present in mitochondria and regulates cellular respiration in a transcriptional-independent manner. The mechanism of STAT3 import into mitochondria remains obscure. In this report we show that mitochondrial-localized STAT3 resides in the inner mitochondrial membrane. In vitro import studies show that the gene associated with retinoid interferon induced cell mortality 19 (GRIM-19), a complex I subunit that acts as a chaperone to recruit STAT3 into mitochondria. In addition, GRIM-19 enhances the integration of STAT3 into complex I. A S727A mutation in STAT3 reduces its import and assembly even in the presence of GRIM-19. Together, our studies unveil a novel chaperone function for GRIM-19 in the recruitment of STAT3 into mitochondria.

"Ne opravilsja jeshtsho posle grippa..." : [luuletused] / Aleksei Koroljov

Index Scriptorium Estoniae

Koroljov, Aleksei

2001-01-01

Autor endast lk. 44. Sisu: "Ne opravilsja jeshtsho posle grippa..." ; "Tak plohho mne, kak ne bõlo davno..." ; "Vokrug tebja, kak satellit..." ; "Hotja i ne ossobenno ona..." ; Iz dnevnika ; Zdravõi smõsl ; "V ushko igolnoje prodenu..." ; "Zhenshtshine prostitelnõ nedostatki..." ; "Balagurja, taratorja..." "Kogda bõ sprava - rai..." ; 23-i skorõi ; "Velmozhi v rogozhe iz blazhi i drozhi..."

Letter of intent for KM3NeT 2.0

NARCIS (Netherlands)

Adrián-Martínez, S.; Ageron, M.; Aharonian, F.; Aiello, S.; Albert, A.; Ameli, F.; Anassontzis, E.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anton, G.; Ardid, M.; Avgitas, T.; Barbarino, G.; Barbarito, E.; Baret, B.; Barrios-Martí, J.; Belhorma, B.; Belias, A.; Berbee, E.; Berg, A. van den; Bertin, V.; Beurthey, S.; Beveren, V. van; Beverini, N.; Biagi, S.; Biagioni, A.; Billault, M.; Bondì, M.; Bormuth, R.; Bouhadef, B.; Bourlis, G.; Bourret, S.; Boutonnet, C.; Bouwhuis, M.; Bozza, C.; Bruijn, R.; Brunner, J.; Buis, E.J.; Busto, J.; Cacopardo, G.; Caillat, L.; Calamai, M.; Calvo, D.; Capone, A.; Caramete, L.; Cecchini, S.; Celli, S.; Champion, C.; El Moursli, R.C.; Cherubini, S.; Chiarusi, T.; Circella, M.; Classen, L.; Cocimano, R.; Coelho, J.A.B.; Coleiro, A.; Colonges, S.; Coniglione, R.; Cordelli, M.; Cosquer, A.; Coyle, P.; Creusot, A.; Cuttone, G.; D'Amico, A.; De Bonis, G.; De Rosa, G.; De Sio, C.; Di Capua, F.; Di Palma, I.; Díaz García, A.F.; Distefano, C.; Donzaud, C.; Dornic, D.; Dorosti-Hasankiadeh, Q.; Drakopoulou, E.; Drouhin, D.; Drury, L.; Durocher, M.; Eberl, T.; Eichie, S.; Eijk, D. van; El Bojaddaini, I.; El Khayati, N.; Elsaesser, D.; Enzenhöfer, A.; Fassi, F.; Favali, P.; Fermani, P.; Ferrara, G.; Filippidis, C.; Frascadore, G.; Fusco, L.A.; Gal, T.; Galatà, S.; Garufi, F.; Gay, P.; Gebyehu, M.; Giordano, V.; Gizani, N.; Gracia, R.; Graf, K.; Grégoire, T.; Grella, G.; Habel, R.; Hallmann, S.; Haren, H. van; Harissopulos, S.; Heid, T.; Heijboer, A.; Heine, E.; Henry, S.; Hernández-Rey, J.J.; Hevinga, M.; Hofestädt, J.; Hugon, C.M.F.; Illuminati, G.; James, C.W.; Jansweijer, P.; Jongen, M.; Jong, M. de; Kadler, M.; Kalekin, O.; Kappes, A.; Katz, U.F.; Keller, P.; Kieft, G.; Kießling, D.; Koffeman, E.N.; Kooijman, P.; Kouchner, A.; Kulikovskiy, V.; Lahmann, R.; Lamare, P.; Leisos, A.; Leonora, E.; Clark, M.L.; Liolios, A.; Alvarez, C.D.L.; Lo Presti, D.; Löhner, H.; Lonardo, A.; Lotze, M.; Loucatos, S.; MacCioni, E.; Mannheim, K.; Margiotta, A.; Marinelli, A.; Maris, O.; Markou, C.; Martínez-Mora, J.A.; Martini, A.; Mele, R.; Melis, K.W.; Michael, T.; Migliozzi, P.; Migneco, E.; Mijakowski, P.; Miraglia, A.; Mollo, C.M.; Mongelli, M.; Morganti, M.; Moussa, A.; Musico, P.; Musumeci, M.; Navas, S.; Nicolau, C.A.; Olcina, I.; Olivetto, C.; Orlando, A.; Papaikonomou, A.; Papaleo, R.; Pavalas, G.E.; Peek, H.; Pellegrino, C.; Perrina, C.; Pfutzner, M.; Piattelli, P.; Pikounis, K.; Poma, G.E.; Popa, V.; Pradier, T.; Pratolongo, F.; Pühlhofer, G.; Pulvirenti, S.; Quinn, L.; Racca, C.; Raffaelli, F.; Randazzo, N.; Rapidis, P.; Razis, P.; Real, D.; Resvanis, L.; Reubelt, J.; Riccobene, G.; Rossi, C.; Rovelli, A.; Saldaña, M.; Salvadori, I.; Samtleben, D.F.E.; García, A.S.; Losa, A.S.; Sanguineti, M.; Santangelo, A.; Santonocito, D.; Sapienza, P.; Schimmel, F.; Schmelling, J.; Sciacca, V.; Sedita, M.; Seitz, T.; Sgura, I.; Simeone, F.; Siotis, I.; Sipala, V.; Spisso, B.; Spurio, M.; Stavropoulos, G.; Steijger, J.; Stellacci, S.M.; Stransky, D.; Taiuti, M.; Tayalati, Y.; Tézier, D.; Theraube, S.; Thompson, L.; Timmer, P.; Tönnis, C.; Trasatti, L.; Trovato, A.; Tsirigotis, A.; Tzamarias, S.; Tzamariudaki, E.; Vallage, B.; Elewyck, V. van; Vermeulen, J.; Vicini, P.; Viola, S.; Vivolo, D.; Volkert, M.; Voulgaris, G.; Wiggers, L.; Wilms, J.; De Wolf, E.; Zachariadou, K.; Zornoza, J.D.; Zúñiga, J.

2016-01-01

The main objectives of the KM3NeT Collaboration are (i) the discovery and subsequent observation of high-energy neutrino sources in the Universe and (ii) the determination of the mass hierarchy of neutrinos. These objectives are strongly motivated by two recent important discoveries, namely: (1) the

Letter of intent for KM3NeT 2.0

NARCIS (Netherlands)

Adrián-Martínez, S.; Ageron, M.; Aharonian, F.; Aiello, S.; Albert, A.; Ameli, F.; Anassontzis, E.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anton, G.; Ardid, M.; Avgitas, T.; Barbarino, G.; Barbarito, E.; Baret, B.; Barrios-Martí, J.; Belhorma, B.; Belias, A.; Berbee, E.; van den Berg, A.; Bertin, V.; Beurthey, S.; van Beveren, V.; Beverini, N.; Biagi, S.; Biagioni, A.; Billault, M.; Bondi, M.; Bormuth, R.; Bouhadef, B.; Bourlis, G.; Bourret, S.; Boutonnet, C.; Bouwhuis, M.; Bozza, C.; Bruijn, R.; Brunner, J.; Buis, E.; Busto, J.; Cacopardo, G.; Caillat, L.; Calamai, M.; Calvo, D.; Capone, A.; Caramete, L.; Cecchini, S.; Celli, S.; Champion, C.; Cherkaoui El Moursli, R.; Cherubini, S.; Chiarusi, T.; Circella, M.; Classen, L.; Cocimano, R.; Coelho, J.A.B.; Coleiro, A.; Colonges, S.; Coniglione, R.; Cordelli, M.; Cosquer, A.; Coyle, P.; Creusot, A.; Cuttone, G.; D'Amico, A.; De Bonis, G.; De Rosa, G.; De Sio, C.; Di Capua, F.; Di Palma, I.; Díaz García, A.F.; Distefano, C.; Donzaud, C.; Dornic, D.; Dorosti-Hasankiadeh, Q.; Drakopoulou, E.; Drouhin, D.; Drury, L.; Durocher, M.; Eberl, T.; Eichie, S.; van Eijk, D.; El Bojaddaini, I.; El Khayati, N.; Elsaesser, D.; Enzenhöfer, A.; Fassi, F.; Favali, P.; Fermani, P.; Ferrara, G.; Filippidis, C.; Frascadore, G.; Fusco, L.A.; Gal, T.; Galatà, S.; Garufi, F.; Gay, P.; Gebyehu, M.; Giordano, V.; Gizani, N.; Gracia, R.; Graf, K.; Grégoire, T.; Grella, G.; Habel, R.; Hallmann, S.; van Haren, H.; Harissopulos, S.; Heid, T.; Heijboer, A.; Heine, E.; Henry, S.; Hernández-Rey, J.J.; Hevinga, M.; Hofestädt, J.; Hugon, C.M.F.; Illuminati, G.; James, C.W.; Jansweijer, P.; Jongen, M.; de Jong, M.; Kadler, M.; Kalekin, O.; Kappes, A.; Katz, U.F.; Keller, P.; Kieft, G.; Kießling, D.; Koffeman, E.N.; Kooijman, P.; Kouchner, A.; Kulikovskiy, V.; Lahmann, R.; Lamare, P.; Leisos, A.; Leonora, E.; Lindsey Clark, M.; Liolios, A.; Llorens Alvarez, C.D.; Lo Presti, D.; Löhner, H.; Lonardo, A.; Lotze, M.; Loucatos, S.; Maccioni, E.; Mannheim, K.; Margiotta, A.; Marinelli, A.; Mariş, O.; Markou, C.; Martínez-Mora, J.A.; Martini, A.; Mele, R.; Melis, K.W.; Michael, T.; Migliozzi, P.; Migneco, E.; Mijakowski, P.; Miraglia, A.; Mollo, C.M.; Mongelli, M.; Morganti, M.; Moussa, A.; Musico, P.; Musumeci, M.; Navas, S.; Nicolau, C.A.; Olcina, I.; Olivetto, C.; Orlando, A.; Papaikonomou, A.; Papaleo, R.; Păvălaş, G.E.; Peek, H.; Pellegrino, C.; Perrina, C.; Pfutzner, M.; Piattelli, P.; Pikounis, K.; Poma, G.E.; Popa, V.; Pradier, T.; Pratolongo, F.; Pühlhofer, G.; Pulvirenti, S.; Quinn, L.; Racca, C.; Raffaelli, F.; Randazzo, N.; Rapidis, P.; Razis, P.; Real, D.; Resvanis, L.; Reubelt, J.; Riccobene, G.; Rossi, C.; Rovelli, A.; Saldaña, M.; Salvadori, I.; Samtleben, D.F.E.; Sánchez García, A.; Sánchez Losa, A.; Sanguineti, M.; Santangelo, A.; Santonocito, D.; Sapienza, P.; Schimmel, F.; Schmelling, J.; Sciacca, V.; Sedita, M.; Seitz, T.; Sgura, I.; Simeone, F.; Siotis, I.; Sipala, V.; Spisso, B.; Spurio, M.; Stavropoulos, G.; Steijger, J.; Stellacci, S.M.; Stransky, D.; Taiuti, M.; Tayalati, Y.; Tézier, D.; Theraube, S.; Thompson, L.; Timmer, P.; Tönnis, C.; Trasatti, L.; Trovato, A.; Tsirigotis, A.; Tzamarias, S.; Tzamariudaki, E.; Vallage, B.; Van Elewyck, V.; Vermeulen, J.; Vicini, P.; Viola, S.; Vivolo, D.; Volkert, M.; Voulgaris, G.; Wiggers, L.; Wilms, J.; de Wolf, E.; Zachariadou, K.; Zornoza, J.D.; Zúñiga, J.

The main objectives of the KM3NeT Collaboration are (i) the discovery and subsequent observation of high-energy neutrino sources in the Universe and (ii) the determination of the mass hierarchy of neutrinos. These objectives are strongly motivated by two recent important discoveries, namely: (1) the

19 CFR 212.22 - Reply.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Reply. 212.22 Section 212.22 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT Procedures for Considering Applications § 212.22 Reply. Within 15...

‘Transnationalising’ Ne Bis In Idem: How the Rule of Ne Bis In Idem Reveals the Principle of Personal Legal Certainty

Directory of Open Access Journals (Sweden)

Juliette Lelieur

2013-09-01

Full Text Available Since Article 54 of the Convention implementing the Schengen Agreement gave the rule of ne bis in idem a transnational dimension, talk of the ‘transnational ne bis in idem principle’ has been commonplace. Thus, when looking for general principles of transnational criminal law, scholars refer to the principle of ‘transnational ne bis in idem’. It is doubtful, however, that ne bis in idem qualifies as a principle of law. It should be regarded, rather, as a rule of criminal procedure, traditionally based on the principle of res judicata. Giving the rule of ne bis in idem a transnational dimension therefore requires either transnationalising the principle of res judicata, or giving the rule of ne bis in idem a new foundation.The principle of res judicata principally serves the credibility of the justice system in a given jurisdiction by prohibiting several tribunals, all acting within the parameters of their jurisdiction, from contradicting each other’s interpretation of the same facts. For this reason, the principle of res judicata does not provide an adequate basis for a transnationalised rule of ne bis in idem.From a human rights perspective, multiple prosecutions against the same person for the same facts collides with protecting individuals against arbitrary judicial treatment. This is true whether the multiple prosecutions all take place in one country or in several different countries. The rule of ne bis in idem could therefore be regarded as a manifestation of the (new ‘principle of personal legal certainty’.

Investigation of incomplete fusion dynamics by measurement of excitation functions in the 20Ne + 59Co system

International Nuclear Information System (INIS)

Singh, D.; Linda, Sneha Bharti; Giri, Pankaj K.; Singh, Smita Shree; Kumar, Harish; Afzal Ansari, M.; Ali, Rahbar; Rashid, M.H.; Guin, R.; Das, S.K.

2015-01-01

In the present work, an attempt has been made to address some important aspects of CF and ICF dynamics for the system 20 Ne + 59 Co in the projectile energy range ≈ 62–150 MeV by using recoil catcher activation technique with the following off-line γ-ray spectroscopy. Excitation Functions (EFs) for the following reactions: 59 Co(Ne, α p4n) 70 Ga, 59 Co(Ne, 3αp3n) 63 Zn, 59 Co (Ne, 3αp4n) 62 Zn and 59 Co (Ne, 4α3n) 60 Cu have been measured. No precursor decay contribution has been observed for these measured evaporation residues. The measured values of total fusion cross-sections of the above evaporation residues have been compared with the theoretical total complete fusion cross sections calculated by code PACE-2, which do not take into account ICF contribution

An exciton approach to the excited states of two electron atoms. II Determination of spectroscopic parameters, polarizabilites and dispersion coefficients of H-, He, Li+, Be2+ and Ne8+

International Nuclear Information System (INIS)

Schipper, P.E.; Martire, B.

1985-01-01

The exciton model is applied quantitatively to a description of the excited states of representative members of the helium isoelectronic series; viz. H + , He, Li + , Be 2+ and Ne 8+ . The energies of the eight lowest excited states are in good agreement with experiment, for a relatively small (1s-4p) hydrogenic basis; the ground state is obtained with slightly less precision. Response properties including oscillator strengths, polarizabilites and dispersion interaction coefficients are also calculated. The method leads to particularly simple interpretations of the wave functions and the energies

Parvoviral nuclear import: bypassing the host nuclear-transport machinery.

Science.gov (United States)

Cohen, Sarah; Behzad, Ali R; Carroll, Jeffrey B; Panté, Nelly

2006-11-01

The parvovirus Minute virus of mice (MVM) is a small DNA virus that replicates in the nucleus of its host cells. However, very little is known about the mechanisms underlying parvovirus' nuclear import. Recently, it was found that microinjection of MVM into the cytoplasm of Xenopus oocytes causes damage to the nuclear envelope (NE), suggesting that the nuclear-import mechanism of MVM involves disruption of the NE and import through the resulting breaks. Here, fluorescence microscopy and electron microscopy were used to examine the effect of MVM on host-cell nuclear structure during infection of mouse fibroblast cells. It was found that MVM caused dramatic changes in nuclear shape and morphology, alterations of nuclear lamin immunostaining and breaks in the NE of infected cells. Thus, it seems that the unusual nuclear-import mechanism observed in Xenopus oocytes is in fact used by MVM during infection of host cells.

Status of the KM3NeT project

International Nuclear Information System (INIS)

Margiotta, A

2014-01-01

KM3NeT is a deep-sea research infrastructure being constructed in the Mediterranean Sea. It will be installed at three sites: KM3NeT-Fr, offshore Toulon, France, KM3NeT-It, offshore Portopalo di Capo Passero, Sicily (Italy) and KM3NeT-Gr, offshore Pylos, Peloponnese, Greece. It will host the next generation Cherenkov neutrino telescope and nodes for a deep sea multidisciplinary observatory, providing oceanographers, marine biologists, and geophysicists with real time measurements. The neutrino telescope will search for Galactic and extra-Galactic sources of neutrinos, complementing IceCube in its field of view. The detector will have a modular structure and consists of six building blocks, each including about one hundred Detection Units (DUs). Each DU will be equipped with 18 multi-PMT digital optical modules. The first phase of construction has started and shore and deep-sea infrastructures hosting the future KM3NeT detector are being prepared in France near Toulon and in Italy, near Capo Passero in Sicily. The technological solutions for KM3NeT and the expected performance of the detector are presented and discussed

19 CFR 210.25 - Sanctions.

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2010-04-01

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19 CFR 212.01 - Purpose.

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2010-04-01

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19 CFR 210.16 - Default.

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2010-04-01

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Comments on Auger electron production by Ne/sup +/ bombardment of surfaces

Energy Technology Data Exchange (ETDEWEB)

Pepper, S V; Ferrante, J [National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center

1979-09-01

In this letter, the authors first report rather conclusive experimental evidence showing that the Ne Auger signal is due to asymmetric Ne-metal collisions and not symmetric Ne-Ne collisions. Next it is shown that the Ne Auger signal is in fact observable by Ne/sup +/ bombardment of Si and with signal strength comparable to that of the Si Auger signal for 3 keV incident ion energy. Finally, they comment on some trends in the relative amplitudes of the 21.9 and 25.1 eV Ne Auger signals as a function of incident ion energy and target species.

Quest of halo in 31Ne using Glauber model formalism with deformed relativistic mean field density

International Nuclear Information System (INIS)

Sharma, Mahesh K.; Patra, S.K.

2012-01-01

The advancement of radio active ion beam (RIB) explored the structure of exotic nuclei, which are away from the β stability line. Such nuclei with weak binding lie at the limit of stability and exhibit some fascinating phenomena. One of them is the formation of one or more nucleon halo structure. It is well established that the interaction cross section of halo nuclei like 11 Li, 11 Be and 19 C show anomalously large interaction cross sections and matter radius than that of their neighboring nuclei. Some recent investigations for 31 Ne predict that has a halo nature. The first experimental evidence also suggests 31 Ne as a halo candidate. The isotope 31 Ne having N=21, which breaks the shell closer structure as a consequence of deformation associated with the strong intruder configuration and having special interest, because it lie at island of inversion. Here we apply the well known Glauber approach with conjunction of deformed relativistic mean field densities of projectile and target nuclei. It is to be noted that Panda et al has done the similar calculation using a spherical density

Malaria, Tarai Adivasi and the Landlord State in the 19th century Nepal: A Historical-Ethnographic Analysis

Directory of Open Access Journals (Sweden)

Janak Rai

2014-05-01

Full Text Available This paper examines the interplay between malaria, the Tarai Adivasi and the extractive landlord state in the 19th century Nepal by focusing on Dhimal, one indigenous community from the easternmost lowlands. Throughout the 19th century, the Nepali state and its rulers treated the Tarai as a state geography of extraction for land, labor, revenue and political control. The malarial environment of the Tarai, which led to the shortage people (labor force, posed a major challenge to the 19th  century extractive landlord state and the landowning elites to materialize the colonizing project in the Tarai. The shortage of labor added pressure on the malaria resistant Tarai Adivasi to reclaim and cultivate land for the state. The paper highlights the need for ethnographically informed social history of malaria in studying the changing relations between the state and the ?div?si communities in the Tarai DOI: http://dx.doi.org/10.3126/dsaj.v7i0.10438 Dhaulagiri Journal of Sociology and Anthropology Vol. 7, 2013; 87-112

UCB-NE-101 user's manual

International Nuclear Information System (INIS)

Lee, W.W.L.

1989-02-01

The purpose of this manual is to provide users of UCB-NE-101 with the information necessary to use UCB-NE-101 effectively. UCB-NE-101 calculates the concentration of solubility-limited species as a function of space and time and its mass flux rates from a waste sphere buried in a nuclear waste repository in water-saturated rock. The waste is surrounded by one type of rock, and some distance away, there is another type of rock. The inner layer of rock can be a backfill around a nuclear waste package and the outer layer the natural rock. The mass flux calculated is at the interface of the two layers. The species concentration calculated is in the inner layer. A constant concentration of the species, usually the solubility, is specified at the waste sphere/inner layer interface. Dissolution and transport is governed by the solubility of the species, and diffusion in the porous media. 1 ref., 1 fig

Reaction cross section for Ne isotopes

International Nuclear Information System (INIS)

Panda, R.N.; Sahu, B.K.; Patra, S.K.

2012-01-01

In the present contribution, first the bulk properties are calculated, such as binding energy (BE), root mean square charge radius r ch , matter radius r m and quadrupole deformation parameter β 2 for 18-32 Ne isotopes in the Relativistic mean field (RMF) and effective field theory motivated RMF (E-RMF) formalisms . Then the total nuclear reaction cross section σR is analyzes for the scattering of 20 Ne and 28-32 Ne from a 12 C target at 240 MeV/nucleon by using the RMF model. Thus the objective of the present study is to calculate the bulk properties as well as a systematic analysis of σR over a range of neutron rich nuclei in the frame work of Glauber model

19 CFR 210.24 - Interlocutory appeals.

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2010-04-01

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19 CFR 210.35 - Prehearing conferences.

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2010-04-01

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19 CFR 210.18 - Summary determinations.

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2010-04-01

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19 CFR 210.71 - Information gathering.

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2010-04-01

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Isospin dependent Boltzmann-langevin equation and the production cross section of 19Na

International Nuclear Information System (INIS)

Ming Zhaoyu; Zhang Fengshou; Chen Liewen; Zhu Zhiyuan; Zhang Wenlong; Guo Zhongyan; Xiao Guoqing

2000-01-01

A new transport model (isospin dependent Boltzmann-Langevin equation) is developed and it is shown that this model can regenerate the experimental data for reaction of 12 C + 12 C at 28.7 MeV/u. The production cross section of 19 Na is systematically studied for reactions of 17-20,22 Ne + 12 C at 28.7 MeV/u. It is found that a neutron deficient projectile has larger 19 Na cross section than a stable projectile

Sembène Ousmane's Xala: The Use of Film and Novel as Revolutionary Weapon

Directory of Open Access Journals (Sweden)

Kenneth Harrow

1980-01-01

Full Text Available Sembène Ousmane's Xala was written as a novel and made into a film in 1974. It is a biting attack upon the newly risen bourgeois class that has ascended to power and wealth in Senegal since independence. The ideological framework of Xala rests upon Marxist assumptions adapted to and modified by the circumstances in Africa. The distinctively Senegalese features which mark Sembène's portrayal include Muslim and traditional religious beliefs which form the basis of the class oppression and the sexism depicted in Xala . They also supply the title to the work since xala means impotency in Wolof, and it is described with great humor by Sembène, as the result of a marabout's curse. Sembène's treatment of the theme of class oppression focuses upon the great disparities that exist between the wealthy, elite classes and the impoverished masses, especially the beggars and cripples who live on the streets of Dakar. By focusing upon the issue of acculturation in the film, and by emphasizing the importance of imagery related to sight and the act of seeing, Sembène effectively overcomes the deficiencies of the novel in creating the film version of Xala .

19 CFR 12.40 - Seizure; disposition of seized articles; reports to United States attorney.

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2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Seizure; disposition of seized articles; reports... § 12.40 Seizure; disposition of seized articles; reports to United States attorney. (a) Any book... United States attorney for his consideration and action. (b) Upon the seizure of articles or matter...

NeSSM: a Next-generation Sequencing Simulator for Metagenomics.

Directory of Open Access Journals (Sweden)

Ben Jia

Full Text Available BACKGROUND: Metagenomics can reveal the vast majority of microbes that have been missed by traditional cultivation-based methods. Due to its extremely wide range of application areas, fast metagenome sequencing simulation systems with high fidelity are in great demand to facilitate the development and comparison of metagenomics analysis tools. RESULTS: We present here a customizable metagenome simulation system: NeSSM (Next-generation Sequencing Simulator for Metagenomics. Combining complete genomes currently available, a community composition table, and sequencing parameters, it can simulate metagenome sequencing better than existing systems. Sequencing error models based on the explicit distribution of errors at each base and sequencing coverage bias are incorporated in the simulation. In order to improve the fidelity of simulation, tools are provided by NeSSM to estimate the sequencing error models, sequencing coverage bias and the community composition directly from existing metagenome sequencing data. Currently, NeSSM supports single-end and pair-end sequencing for both 454 and Illumina platforms. In addition, a GPU (graphics processing units version of NeSSM is also developed to accelerate the simulation. By comparing the simulated sequencing data from NeSSM with experimental metagenome sequencing data, we have demonstrated that NeSSM performs better in many aspects than existing popular metagenome simulators, such as MetaSim, GemSIM and Grinder. The GPU version of NeSSM is more than one-order of magnitude faster than MetaSim. CONCLUSIONS: NeSSM is a fast simulation system for high-throughput metagenome sequencing. It can be helpful to develop tools and evaluate strategies for metagenomics analysis and it's freely available for academic users at http://cbb.sjtu.edu.cn/~ccwei/pub/software/NeSSM.php.

La consommation de propylène en Europe occidentale Propylene Consumption in Western Europe

Directory of Open Access Journals (Sweden)

Barraqué M.

2006-11-01

Full Text Available Les besoins de l'Europe occidentale en propylène utilisé en pétrochimie sont actuellement de 7,4. 10 puissance 6 t/an. Au cours des prochaines années, le taux de progression moyen de la consommation devrait être de l'ordre de 1,8%/an; ainsi en 1995, la pétrochimie européenne utiliserait environ 8,7. 10 puissance 6 t de propylène. L'essentiel de la progression de cette consommation sera dû au fort accroissement de la production de polypropylène et à un degré moindre de l'oxyde de propylène, de l'isopropanol et de l'éthyl-2 hexanol. Par contre les débouchés représentés par l'acrylonitrile et le cumène resteront pratiquement stables. La consommation de propylène dans les productions de butanols devrait diminuer. La part des besoins en propylène satisfaite par les vapocraqueurs européens qui est en 1986 de 82 %, devrait être inférieure à 75 % en 1995. Il sera de plus en plus nécessaire de se tourner vers d'autres sources d'approvisionnement. En 1986 les raffineries européennes ont produit 1,05. 10 puissance 6 t de propylène utilisé en pétrochimie et les importations ont atteint 0,3. 10 puissance 6 t. En 1995 la différence entre la consommation et la production des vapocraqueurs pourrait dépasser 2,0. 10 puissance 6 t. Il semble peu probable que les unités de craquage catalytique puissent combler le déficit sauf si les rendements en propylène augmentent très notablement. On peut s'attendre à la construction de splitters propylène/propane et à une augmentation des importations. D'autre part, en raison de la tension qui risque d'apparaître sur les prix du propylène, l'intérêt de certaines voies de synthèse actuellement considérées comme non rentables pourrait augmenter; ces nouvelles voies sont : - la déshydrogénation du propane déjà considérée dans d'autres régions (Mexique, Indonésie, Malaisie; - la métathèse entre l'éthylène et les butènes-2, pouvant eux-mêmes être produits à partir d'éthylène

Interference of Coulomb and nuclear excitation in inelastic scattering of 20Ne from 40Ca

International Nuclear Information System (INIS)

Ratel, Guy.

1976-01-01

Angular distributions at 54 and 63MeV and excitation functions from 35 to 95MeV for the elastic and inelastic scattering of 20 Ne by 40 Ca have been measured. Experimental data for the inelastic scattering leading to the 20 Ne (2 + , 1.63MeV) state show a characteristic minimum for the angular distributions and excitation functions. This phenomenon was explained by an interference effect between Coulomb and nuclear excitation amplitudes with the DWBA and the coupled-channel formalism. The existence of this interference minimum could be explained only by assuming a nuclear deformation stronger than these obtained with light ion scattering. However a small shift between the experimental data and theoretical curves suggests that effects of a stronger complex coupling or nuclear reorientation due to the large quadrupole moment of 20 Ne must be included [fr

19 CFR 210.64 - Interlocutory appeals.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Interlocutory appeals. 210.64 Section 210.64 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.64 Interlocutory appeals. There will be no...

34 CFR 403.19 - What are the responsibilities of a State council on vocational education?

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2010-07-01

... 34 Education 3 2010-07-01 2010-07-01 false What are the responsibilities of a State council on...? § 403.19 What are the responsibilities of a State council on vocational education? (a)(1) The State council on vocational education shall meet as soon as practical after the Secretary accepts its...

High Level Requirements for the Nuclear Energy -- Knowledge Base for Advanced Modeling and Simulation (NE-KAMS)

Energy Technology Data Exchange (ETDEWEB)

Rich Johnson; Hyung Lee; Kimberlyn C. Mousseau

2011-09-01

(NE-KAMS) is being developed at the Idaho National Laboratory in conjunction with Bettis Laboratory, Sandia National Laboratories, Argonne National Laboratory, Utah State University and others with the objective of establishing a comprehensive and web-accessible knowledge base that will provide technical services and resources for V&V and UQ of M&S in nuclear energy sciences and engineering. The knowledge base will serve as an important resource for technical exchange and collaboration that will enable credible and reliable computational models and simulations for application to nuclear reactor design, analysis and licensing. NE-KAMS will serve as a valuable resource for the nuclear industry, academia, the national laboratories, the U.S. Nuclear Regulatory Commission (NRC) and the public and will help ensure the safe, economical and reliable operation of existing and future nuclear reactors. From its inception, NE-KAMS will directly support nuclear energy research, development and demonstration programs within the U.S. Department of Energy (DOE), including the CASL, NEAMS, Light Water Reactor Sustainability (LWRS), Small Modular Reactors (SMR), and Next Generation Nuclear Power Plant (NGNP) programs. These programs all involve M&S of nuclear reactor systems, components and processes, and it is envisioned that NE-KAMS will help to coordinate and facilitate collaboration and sharing of resources and expertise for V&V and UQ across these programs.

What are the advantages of a three body model with core excitation for 21Ne and 21Na?

International Nuclear Information System (INIS)

Nunes, F.M.; Thompson, I.J.

2004-01-01

21 Ne and 21 Na are well bound nuclei and there is a large amount of data available up to considerable excitation energy, and this imposes a severe test on the structure models. Preliminary results for the structure of these nuclei based on three body models ( 21 Ne= 16 O+α+n and 21 Na= 16 O+α+p) are presented. Three-body calculations without core excitation produce the positive parity states in fair agreement with experiment, while slightly overbinding the systems. As expected, these models fail to reproduce the low lying negative parity states, which are predicted by shell model to have mainly core excited configurations. As a first step we have included the 3 - state of 16 O in our model. Convergence issues will be discussed. Results suggest that more excited states may be required to describe the system

Highly efficient F-19 heteronuclear decoupling in solid-state NMR spectroscopy using supercycled refocused-CW irradiation

DEFF Research Database (Denmark)

Equbal, Asif; Basse, Kristoffer; Nielsen, Niels Christian

2016-01-01

We present heteronuclear F-19 refocused CW (rCW) decoupling pulse sequences for solid-state magic-angle- spinning NMR applications. The decoupling sequences have been designed specifically to ensure suppression of the pertinent C-13-F-19 dipolar coupling interactions while simultaneously suppress...

Calibration of detectors type CR-39 for methodology implementation for Radon-222 determination in CRCN-NE, Brazil; Calibração de detectores do tipo CR-39 para implementação da metodologia de determinação de radônio-222 no CRCN-NE

Energy Technology Data Exchange (ETDEWEB)

Silva, Karolayne E.M. da; Santos, Mariana L. de O.; Amaral, Déric S. do; Vilela, Eldice C.; França, Elvis J. de; Hazin, Clovis A.; Farias, Emerson E.G. de, E-mail: keesthefany@gmail.com, E-mail: marianasantos_ufpe@hotmail.com, E-mail: dericsoares@gmail.com, E-mail: ecvilela@cnen.gov.br, E-mail: ejfrana@cnen.gov.br, E-mail: chazin@cnen.gov.br, E-mail: emersonemiliamo@yahoo.com.br [Centro Regional de Ciências Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

2017-07-01

Radon-222 is a radioactive gas, a product of the decay of uranium-238, which emits alpha particles and represents more than 50% of the dose of natural radiation received by the population. Therefore, monitoring of this gas is essential. For indoor measurement, solid state detectors can be used, the most common of which is CR-39. For monitoring using CR-39, alpha particles, generated by radon-222 and the daughter radionuclides, strike the surface of the detector and generate traces. To relate the trace density per exposure area in environments with unknown activity concentration, it is necessary to determine the calibration factor. The objective of this study was to calibrate CR-39 type detectors for the implementation of the radon determination methodology in Centro Regional de Ciencias Nucleares do Nordeste - CRCN-NE of Brazilian Nuclear Energy Commission - CNEN. In order to determine the CR-39 calibration factor, 19 exposures of the detectors were performed in the CRCN-NE calibration chamber (RN1-CRCN) at an activity of 5.00 kBq m{sup -3}, with the exposure time varying from 24 to 850 hours. For the detection of the detectors, sodium hydroxide was used in a thermostat bath at 90 ° C for 5 hours. The count of number of traits per unit of field was performed with the aid of optical microscopy with an increase of 100 times, being read 30 fields per dosimeters. As a result, the calibration factor was obtained, and the linear response of the trace density as a function of exposure was observed. The results allow the use of CR-39 in the determination of radon-222 by CRCN-NE.

Measurements of Neutrino Charged Current Interactions at SciBooNE

Energy Technology Data Exchange (ETDEWEB)

Nakajima, Yasuhiro [Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)], E-mail: nakajima@scphys.kyoto-u.ac.jp

2009-08-15

The SciBooNE experiment (FNAL-E954) is designed to measure neutrino-nucleous cross sections in the one GeV region. Additionally, SciBooNE serves as a near detector for MiniBooNE by measuring the neutrino flux. In this paper, we describe two analyses using neutrino charged current interactions at SciBooNE: a neutrino spectrum measurement and a search for charged current coherent pion production.

Greenhouse gas emissions of imported and locally produced fruit and vegetable commodities: A quantitative assessment

International Nuclear Information System (INIS)

Michalský, Marián; Hooda, Peter S.

2015-01-01

Highlights: • Green house gas (GHG) emission of selected fruit and vegetables (SFVs) estimated. • Production and transport – most energy-intensive life cycle stages considered. • Sourcing SFVs from non-European countries causes much GHG emissions. • Increased UK production of SFVs offers considerable emission savings. • Sourcing SFVs from Europe can help make considerable GHG emission savings. - Abstract: Today considerable efforts are being made in identifying means of further energy efficiencies within the UK food system. Current air importation of fruit and vegetables (FVs) generates large amounts of greenhouse gas (GHG) emissions part of which could be avoided. Local food production has been recognized as an environmentally feasible alternative production option and could help reduce GHG emissions, as required under the legally binding emissions targets stipulated by the UK Climate Change Act 2008. Climate change impacts of FVs importation were determined for a selection of five indigenous FV commodities, namely: apples, cherries, strawberries, garlic and peas. Carbon dioxide equivalents (CO 2 e) emissions associated with the production and transport stages were calculated using the sample of selected fruit and vegetables (SFVs). The latter stage includes three diverse geographic locations/regions for emissions comparison, namely the UK, Europe and non-European (NE) countries. On average (across the five SFVs), NE commodities, all in fresh/chilled state, were found to contain embedded (arising from production, air freighting and distribution within the UK) GHG emissions of 10.16 kg CO 2 e/kg. This is 9.66 kg more CO 2 e emissions compared to a kilogram of these commodities produced and supplied locally. A scenario-based approach determined the level of emissions savings that could be achieved by local FVs production in the UK. The least dramatic change of SCENARIO-1 (25% reduction in NE SFVs imports by increasing their local production by the same

Spectroscopy of Na-18: Bridging the two-proton radioactivity of Mg-19

Czech Academy of Sciences Publication Activity Database

Assie, M.; de Oliveira Santos, F.; Achouri, L.; Angelique, J. C.; Borcea, C.; Borcea, R.; Caceres, L.; Chudoba, V.; Pang, D. Y.; Ducoin, D.; Fallot, M.; Kamalou, O.; Kiener, J.; Lam, Y.; Lefevre, A.; Lotay, G.; Mrázek, Jaromír; Perrot, L.; Sánchez, A.; Rotaru, F.

2012-01-01

Roč. 712, č. 3 (2012), s. 198-202 ISSN 0370-2693 Grant - others:European Commission(XE) RII3-CT-2004-506065 Institutional support: RVO:61389005 Keywords : two-proton radioactivity * resonant elastic scattering * (19)mg * Na-18 * Ne-17 Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 4.569, year: 2012

Study of proton and 2 protons emission from light neutron deficient nuclei around A=20; Etude de l'emission proton et de deux protons dans les noyaux legers deficients en neutrons de la region A=20

Energy Technology Data Exchange (ETDEWEB)

Zerguerras, T

2001-09-01

Proton and two proton emission from light neutron deficient nuclei around A=20 have been studied. A radioactive beam of {sup 18}Ne, {sup 17}F and {sup 20}Mg, produced at the Grand Accelerateur National d'Ions Lourds by fragmentation of a {sup 24}Mg primary beam at 95 MeV/A, bombarded a {sup 9}Be target to form unbound states. Proton(s) and nuclei from the decay were detected respectively in the MUST array and the SPEG spectrometer. From energy and angle measurements, the invariant mass of the decaying nucleus could be reconstructed. Double coincidence events between a proton and {sup 17}F, {sup 16}O, {sup 15}O, {sup 14}O and {sup 18}Ne were registered to obtain excitation energy spectra of {sup 18}Ne, {sup 17}F, {sup 16}F, {sup 15}F et {sup 19}Na. Generally, the masses measures are in agreement with previous experiments. In the case of {sup 18}Ne, excitation energy and angular distributions agree well with the predictions of a break up model calculation. From {sup 17}Ne proton coincidences, a first experimental measurement of the ground state mass excess of {sup 18}Na has been obtained and yields 24,19(0,15)MeV. Two proton emission from {sup 17}Ne and {sup 18}Ne excited states and the {sup 19}Mg ground state was studied through triple coincidences between two proton and {sup 15}O, {sup 16}O and {sup 17}Ne respectively. In the first case, the proton-proton relative angle distribution in the center of mass has been compared with model calculation. Sequential emission from excited states of {sup 17}Ne, above the proton emission threshold, through {sup 16}F is dominant but a {sup 2}He decay channel could not be excluded. No {sup 2}He emission from the 1.288 MeV {sup 17}Ne state, or from the 6.15 MeV {sup 18}Ne state has been observed. Only one coincidence event between {sup 17}Ne and two proton was registered, the value of the one neutron stripping reaction cross section of {sup 20}Mg being much lower than predicted. (author)

Study of proton and 2 protons emission from light neutron deficient nuclei around A=20; Etude de l'emission proton et de deux protons dans les noyaux legers deficients en neutrons de la region A=20

Energy Technology Data Exchange (ETDEWEB)

Zerguerras, T

2001-09-01

Proton and two proton emission from light neutron deficient nuclei around A=20 have been studied. A radioactive beam of {sup 18}Ne, {sup 17}F and {sup 20}Mg, produced at the Grand Accelerateur National d'Ions Lourds by fragmentation of a {sup 24}Mg primary beam at 95 MeV/A, bombarded a {sup 9}Be target to form unbound states. Proton(s) and nuclei from the decay were detected respectively in the MUST array and the SPEG spectrometer. From energy and angle measurements, the invariant mass of the decaying nucleus could be reconstructed. Double coincidence events between a proton and {sup 17}F, {sup 16}O, {sup 15}O, {sup 14}O and {sup 18}Ne were registered to obtain excitation energy spectra of {sup 18}Ne, {sup 17}F, {sup 16}F, {sup 15}F et {sup 19}Na. Generally, the masses measures are in agreement with previous experiments. In the case of {sup 18}Ne, excitation energy and angular distributions agree well with the predictions of a break up model calculation. From {sup 17}Ne proton coincidences, a first experimental measurement of the ground state mass excess of {sup 18}Na has been obtained and yields 24,19(0,15)MeV. Two proton emission from {sup 17}Ne and {sup 18}Ne excited states and the {sup 19}Mg ground state was studied through triple coincidences between two proton and {sup 15}O, {sup 16}O and {sup 17}Ne respectively. In the first case, the proton-proton relative angle distribution in the center of mass has been compared with model calculation. Sequential emission from excited states of {sup 17}Ne, above the proton emission threshold, through {sup 16}F is dominant but a {sup 2}He decay channel could not be excluded. No {sup 2}He emission from the 1.288 MeV {sup 17}Ne state, or from the 6.15 MeV {sup 18}Ne state has been observed. Only one coincidence event between {sup 17}Ne and two proton was registered, the value of the one neutron stripping reaction cross section of {sup 20}Mg being much lower than predicted. (author)

Lääne-Virumaa ettevõtete TOP aastal 2004

Index Scriptorium Estoniae

2005-01-01

Tabelid: Lääne-Virumaa ettevõtete TOP 50; Käibe TOP 35; Kasumi TOP 35; Lääne-Virumaa ettevõtete üld- ja finantsandmed; Käibe kasvu TOP 20; Kasumi kasvu TOP 20; Rentaabluse TOP 20; Omakapitali tootlikkuse TOP 20. Vt. samas: Viktor Sepp, Merike Lees. Lääne-Virumaal üllatavad uued tegijad

Elastic and inelastic form factors of the Ne20 in the Hartree-Fock approximation

International Nuclear Information System (INIS)

Oliveira, S.A.C. de.

1977-01-01

Properties of Ne 20 fundamental band are studied such as particle densities and elastic and inelastic form factors. A two body interaction is used and its matrix elements involve only the independent particle states of the 1s-0d shell [pt

19 CFR 210.79 - Advisory opinions.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Advisory opinions. 210.79 Section 210.79 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE... of the Tariff Act of 1930, would be in the public interest, and would benefit consumers and...

19 CFR 210.13 - The response.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false The response. 210.13 Section 210.13 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Pleadings § 210.13 The response. (a) Time for response. Except as provided in...

19 CFR 210.26 - Other motions.

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2010-04-01

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19 CFR 210.62 - Evidentiary hearing.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Evidentiary hearing. 210.62 Section 210.62 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.62 Evidentiary hearing. An opportunity for a hearing in...

Gayrimüslimlerin Osmanlı Devleti’ne Bağlılık Nedenleri Reasons Behind Non-Muslims’ Allegiance To The Ottoman State

Directory of Open Access Journals (Sweden)

Ramazan GÜNAY

2012-12-01

Full Text Available From the year of establishment on, the Ottoman Empire carried out a policy of enlargement towards the west where non-Muslim inhabited. As it set out with the idea of “Gaza” (holy war, the Ottoman Empire first annexed the west of Anatolia and later the central regions of Europe and the Balkans. The Ottoman State did not interfere with the established rules, traditions and beliefs of people who were old residents in the new conquered lands. It gave large freedoms to people in conquered lands and preferred to make a harmony with them and classified the citizens under its rule according to their religion/sect. It is not sensible to claim that just military power led non-Muslims, who lived under the Ottoman rule for about five/six centuries, to live under the rule of another state for so long. Within the frame of the rights of Dhimmies and national system, religious, juridical, economic and social rights granted to non-Muslims help us understand the reason why non-Muslims were loyal to the Ottoman State for so long.In this article, the causes of faith of non-Muslims to the Ottoman State have been assessed and this assessment has been made based on the sources of that period. These documents from Ottoman Archives, which have not been used yet, belong to Ottoman period from 16th to 19th century. These documents have been selected from Şer’iye Sicilleri (the Qadi’s archives/Shari’a local court records and Ahkâm-Şikâyet Defterleri (Register of Verdicts-Complaint called records of Divan-ı Hümayun (Council of State. Osmanlı Devleti, kuruluş yıllarından itibaren gayrimüslimlerin meskun olduğu Batı’ya doğru genişleme siyaseti izlemiştir. Gaza düşüncesiyle hareket ettiğinden dolayı da öncelikle Anadolu’nun batısı, daha sonra Balkanlar ve Avrupa’nın içlerine kadar olan bölgeyi hakimiyeti altına almıştır. Osmanlı Devleti, yeni ele geçirdiği yerlerde bulunan o yörenin eski sakinlerinin yerleşik birçok kural

Coulomb excitation of radioactive Na21 and its stable mirror Ne21

Science.gov (United States)

Schumaker, M. A.; Cline, D.; Hackman, G.; Morton, A. C.; Pearson, C. J.; Svensson, C. E.; Wu, C. Y.; Andreyev, A.; Austin, R. A. E.; Ball, G. C.; Bandyopadhyay, D.; Becker, J. A.; Boston, A. J.; Boston, H. C.; Buchmann, L.; Churchman, R.; Cifarelli, F.; Cooper, R. J.; Cross, D. S.; Dashdorj, D.; Demand, G. A.; Dimmock, M. R.; Drake, T. E.; Finlay, P.; Gallant, A. T.; Garrett, P. E.; Green, K. L.; Grint, A. N.; Grinyer, G. F.; Harkness, L. J.; Hayes, A. B.; Kanungo, R.; Leach, K. G.; Lee, G.; Maharaj, R.; Martin, J.-P.; Moisan, F.; Mythili, S.; Nelson, L.; Newman, O.; Nolan, P. J.; Orce, J. N.; Padilla-Rodal, E.; Phillips, A. A.; Porter-Peden, M.; Ressler, J. J.; Roy, R.; Ruiz, C.; Sarazin, F.; Scraggs, D. P.; Waddington, J. C.; Wan, J. M.; Whitbeck, A.; Williams, S. J.; Wong, J.

2008-10-01

The low-energy structures of the mirror nuclei Ne21 and radioactive Na21 have been examined by using Coulomb excitation at the TRIUMF-ISAC radioactive ion beam facility. Beams of ~5×106 ions/s were accelerated to 1.7 MeV/A and Coulomb excited in a 0.5 mg/cm2 natTi target. Scattered beam and target particles were detected by the segmented Si detector BAMBINO, while γ rays were observed by using two TIGRESS HPGe clover detectors perpendicular to the beam axis. For each isobar, Coulomb excitation from the (3)/(2)+ ground state to the first excited (5)/(2)+ state was observed and B(E2) values were determined by using the 2+→0+ de-excitation in Ti48 as a reference. The ϕ segmentation of BAMBINO was used to deduce tentative assignments for the signs of the mixing ratios between the E2 and M1 components of the transitions. The resulting B(E2)↑ values are 131±9e2 fm4 (25.4±1.7 W.u.) for Ne21 and 205±14e2 fm4 (39.7±2.7 W.u.) for Na21. The fit to the present data and the known lifetimes determined E2/M1 mixing ratios and B(M1)↓ values of δ=(-)0.0767±0.0027 and 0.1274±0.0025μN2 and δ=(+)0.0832±0.0028 and 0.1513±0.0017μN2 for Ne21 and Na21, respectively (with Krane and Steffen sign convention). By using the effective charges ep=1.5e and en=0.5e, the B(E2) values produced by the p-sd shell model are 30.7 and 36.4 W.u. for Ne21 and Na21, respectively. This analysis resolves a significant discrepancy between a previous experimental result for Na21 and shell-model calculations.

19 CFR 210.10 - Institution of investigation.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Institution of investigation. 210.10 Section 210.10 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Commencement of Preinstitution Proceedings and Investigations...

Microsolvation of the water cation in neon: Infrared spectra and potential energy surface of the H2O+-Ne open-shell ionic complex

Science.gov (United States)

Dopfer, Otto; Roth, Doris; Maier, John P.

2001-04-01

The intermolecular potential of the H2O+-Ne open-shell ionic dimer in its doublet electronic ground state has been investigated by infrared spectroscopy in the vicinity of the O-H stretch vibrations (ν1 and ν3) and ab initio calculations at the unrestricted Møller-Plesset second-order (MP2) level with a basis set of aug-cc-pVTZ quality. The rovibrational structure of the photodissociation spectrum is consistent with a proton-bound planar H-O-H-Ne structure and a Ne-H separation of R0=1.815(5) Å. The complexation-induced redshifts are Δν1=-69 cm-1 and Δν3=-6 cm-1, respectively. Tunneling splittings observed in the perpendicular component of the ν3 hybrid band of H2O+-Ne are attributed to hindered internal rotation between the two equivalent proton-bound equilibrium structures. The interpretation of the H2O+-Ne spectrum is supported by the spectrum of the monodeuterated species, for which both the proton-bound and the deuteron-bound isomers are observed (DOH+-Ne, HOD+-Ne). The equilibrium structure of the calculated potential energy surface of H2O+-Ne has a slightly translinear proton bond, which is characterized by a Ne-H separation of Re=1.77 Å, a bond angle of φe=174°, and dissociation energies of De=756 cm-1 and D0=476 cm-1. According to the calculated potential, the exchange tunneling between the two equivalent minima occurs via the planar bridged transition state with C2v symmetry and a barrier of 340 cm-1. In general, the calculated properties of H2O+-Ne show good agreement with the experimental data. Initial steps in the microsolvation of the water cation in neon are discussed by comparing the calculated and experimental properties of H2O+-Nen (n=0-2) with neon matrix isolation data (n→∞).

Université de Genève | Séminaire de physique corpusculaire | 19 March

CERN Multimedia

2014-01-01

Hunting for sterile neutrinos: short baseline neutrinos at FERMILAB, by Prof. Antonio Ereditato, Bern University.   Wednesday 19 March 2014, 11:15 a.m. Science III, Auditoire 1S081 Boulevard d’Yvoy, 1211 Genève 4 Abstract: The "anomaly" constituted by the LSND/MiniBooNE neutrino signal is still there after many years. This points to the possible existence of sterile neutrinos. An extensive short-mid term program aimed at solving the "puzzle" is being conducted at Fermilab in the Booster neutrino beam, centered on the use of new detectors based on the liquid Argon TPC technology. A multi-step strategy envisions at first the use of the MicroBooNE apparatus, being commissioned in the next months. In a second phase, MicroBooNE will be possibly complemented by the LAr1-ND near detector, being proposed to the Fermilab scientific committee. This program and its prospects will be presented, as well as the parallel work being conducted on LAr TPC...

Comment on 'Experimental study of single- and double-electron transfer in slow Ne8++He collisions using photon and electron spectroscopy'

International Nuclear Information System (INIS)

Bordenave-Montesquieu, A.; Moretto-Capelle, P.; Bordenave-Montesquieu, D.

2002-01-01

In this Comment we question the recent emphasis by Langereis et al. [Phys. Rev. A 60, 2917 (1999)] that excitation of triplet states in double-capture processes is noticeable in the Ne 8+ (1s 2 ) 1 S+He(1s 2 ) 1 S collisional system at 80 keV. We demonstrate that all their identified Ne 6+ (1s 2 3lnl ' ) autoionizing transitions can be perfectly explained by excitation of singlet states alone. In our opinion their findings based on electron spectroscopy rely on too inaccurate spectrum analysis and theoretical input data

19 CFR 210.2 - General policy.

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2010-04-01

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19 CFR 212.03 - Proceedings covered.

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2010-04-01

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THE MIGRATION OF EUROPEANS TO THE UNITED STATES AT THE MIDDLE OF THE 19TH CENTURY – THE IRISH AND GERMAN WAVE

OpenAIRE

Sorin-Stefan Maha

2011-01-01

This article analyses the contribution of the second wave of immigrants to the United States to the formation of the young American people. Unlike other states, the USA is a nation founded on waves of immigrants coming from different parts of the world. This paper includes the second wave of immigrants in US history in the four waves and presents the migration of the Irish and Germans to the USA at the middle of the 19th century. They had an important contribution to the increase of American ...

Stellar origin of the 22Ne excess in cosmic rays

International Nuclear Information System (INIS)

Casse, M.; Paul, J.A.

1982-01-01

The 22 Ne excess at the cosmic-ray source is discussed in terms of a 22 Ne-rich component injected and accelerated by carbon-rich Wolf-Rayet stars. The overabundance of 22 Ne relative to 20 Ne predicted at the surface of these stars is estimated to a factor approx.120 with respect to solar system abundances. In order to give rise to a 22 Ne excess of about 3 at the cosmic-ray sources as inferred from observations, the carbon-rich Wolf-Rayet contribution to the primary cosmic-ray flux is to be at maximum 1/60. This component would be energized by strong stellar winds producing quasi-standing shocks around the Wolf-Rayet stars

Strangeness in nuclear matter at DAΦNE

International Nuclear Information System (INIS)

Gianotti, P.

1998-01-01

The low energy kaons from the φ meson produced at DAΦNE offer a unique opportunity to study strangeness in nuclear matter. The interaction of kaons with hadronic matter can be investigated at DAΦNE using three main approaches: study of hypernuclei production and decay, kaons scattering on nucleons, kaonic atoms formation. These studies explore kaon-nucleon and hyperon-nucleon forces at very low energy, the nuclear shell model in presence of strangeness quantum number and eventual quarks deconfinement phenomena. The experiments devoted to study this physical program at DAΦNE are FINUDA and DEAR. The physics topics of both experiments are illustrated together with a detailed descriptions of the two detectors

Flaking and blistering on He and Ne bombardments

International Nuclear Information System (INIS)

Kamada, K.; Naramoto, H.

1979-01-01

Large scale exfoliation formed by 300 keV He + bombardment of niobium without any preceding blistering is investigated, in comparison with the blistering due to 450 and 850 keV Ne + bombardments. In-situ observations of the erosion processes were performed in a scanning electron microscope connected to the Van de Graaff. Critical doses of 7.2 x 10 17 He + /cm 2 , 2.4 x 10 17 Ne + /cm 2 and 4.0 x 10 17 Ne + /cm 2 were obtained for the 300 keV He flaking, 450 keV Ne blistering and 850 keV Ne blistering, respectively. The He flaking was presumed to be due to brittle fashion peeling-off of the surface layer by the bending moment driven by the internal gas pressure. The blistering, on the other hand, was presumed to be the result of the ductile fashion spreading of the lenticular bubble in the sub-surface layer. The necessary pressure for the peeling-off of the cover was calculated, and was speculated to be able to work as the driving force for the flaking from its unexpectedly low values. Fractographies under the exfoliations were discussed for both flaking and blistering. (author)

KN scattering at DA{Phi}NE?

Energy Technology Data Exchange (ETDEWEB)

Olin, A

1995-06-01

Existing measurements of the KN and K-bar N scattering lengths suffer from large uncertainties, particularly in the I=0 channel. The low energy kaons from {phi} decay available at DA{Phi}NE can be used to improve this situation. Three experimental approaches are discussed: a solid hydrogen target and silicon colorimeter surrounding the collision point. This would also use the magnet and tracking detectors of the FINUDA experiment; a hydrogen TPC is proposed as an active target in the magnetic field of the FINUDA magnet; the FINUDA detector with a CH{sub 2} target could be used to measure an important cross-section. (author). 14 refs., 1 tab., 5 figs.

THE IMPACT OF REFORMING WHEAT IMPORTING STATE-TRADING ENTERPRISES ON THE QUALITY OF WHEAT IMPORTED

OpenAIRE

Lavoie, Nathalie

2003-01-01

Recent surveys of wheat importers indicate that countries that import wheat via a state trader are less sensitive to quality issues in import decision making than countries that import wheat through private traders. This study examines conceptually and empirically the impact of the deregulation of wheat imports on the quality and source of wheat imports.

Guided transmission of 3 keV Ne sup 7 sup + ions through nanocapillaries etched in a PET polymer

CERN Document Server

Stolterfoht, N; Hellhammer, R; Pesic, Z D; Fink, D; Petrov, A; Sulik, B

2003-01-01

We measured the transmission of 3 keV Ne sup 7 sup + ions through capillaries of 100 nm diameter and 10 mu m length produced by etching ion tracks in a polyethylene terephthalate polymer foil. The foils were tilted up to +-25 deg. for which the incident ions are forced to interact with the capillary surface. The majority of Ne sup 7 sup + ions were found to survive the transmission in their initial charge state. For tilted foils the angular distributions of the transmitted particles indicate propagation of the Ne sup 7 sup + ions parallel to the capillary axis. This capillary guiding of the Ne sup 7 sup + ion provides evidence that part of the ions deposit charges within the capillaries in a self-organizing process so that a considerable fraction of the ions is transmitted through the capillaries. A non-linear model is introduced to describe the essential features of the capillary guiding.

Measurement of neutrino induced charged current neutral pion production cross section at SciBooNE

Energy Technology Data Exchange (ETDEWEB)

Catala-Perez, Juan [Univ. of Valencia (Spain)

2014-01-01

SciBooNE is a neutrino scattering experiment located in the Booster Neutrino Beam at Fermilab. It collected data from June 2007 to August 2008 to accurately measure muon neutrino and anti-neutrino cross sections on carbon around 1 GeV neutrino energy. In this thesis we present the results on the measurement of the muon neutrino cross section resulting in a μ^- plus a single π⁰ final state (CC- π⁰ channel). The present work will show the steps taken to achieve this result: from the reconstruction improvements to the background extraction. The flux-averaged CC - π⁰ production cross section measurement obtained in this thesis < σCC- π⁰ > Φ = (5.6 ± 1.9_fit ± 0.7_beam ± 0.5_int - 0.7_det) × 10^-40 cm²/N at an average energy of 0.89 GeV is found to agree well both with the expectation from the Monte Ca

The 257 MeV 19/2/sup -/ two-phonon octupole state in /sup 147/Gd

CERN Document Server

Kleinheinz, P; Kortelahti, M; Piiparinen, M; Styczen, J

1981-01-01

The half-life of the (vf/sub 7/2/*3/sup -/*3/sup -/)/sub 19/2-/ two- phonon octupole states at 2.572 MeV in /sup 147/Gd was measured as T /sub 1/2/=0.37(8) ns, which gives a transition strength of 52(15) WU for the 1525 keV E3 transition to the 0.997 MeV (vf/sub 7/2/*3/sup -/) /sub 13/2+/ one transition to the 0.997 MeV ( nu f/sub 7/2/*3/sup -/) /sub 13/2+/ one phonon excitation. The nu i/sub 13/2/ admixture in the 13/2/sup +/ one-phonon state, as well as the dominant pi h/sub 11/2/d /sub 5//sup -1/2/ component of the /sup 146/Gd 3/sup -/ state give rise to large anharmonicities for the two-phonon excitation. An estimate of the energy shifts based on empirical coupling matrix elements gives 2.66 MeV excitation for the 19/2/sup -/ two-phonon state, in good agreement with the observed energy of that state. (9 refs).

Breaking of the neutron magic number N=20 in {sup 32}Mg and {sup 30}Ne and its possible relation to the cluster structure

Energy Technology Data Exchange (ETDEWEB)

Kimura, Masaaki; Horiuchi, Hisashi [Kyoto Univ. (Japan). Dept. of Physics

2002-01-01

The neutron-rich nuclei {sup 32}Mg and {sup 30}Ne are studied using a new version of antisymmetrized molecular dynamics (AMD). Due to the use of a deformed Gaussian as the single particle wave packet, the description of the deformation properties of Mg isotopes is drastically improved, and l{center_dot}s force is accounted for more largely and sufficiently. After the angular momentum projection, {sup 32}Mg and {sup 30}Ne have deformed ground states, and the experimental data for {sup 32}Mg are reproduced with reasonable accuracy. The deformation of the mean field is found to be essential to describe these nuclei. The ground states of these nuclei have neutron 2p2h structure. In {sup 30}Ne, the cluster-like and the mean-field-like structures coexist. The ground state of {sup 32}Mg has a mean-field-like structure. In the vicinity of the ground state, this nucleus is expected to have excited states with cluster-like structure that possesses the neutron 4p4h configuration. (author)

He-Ne laser effects on blood microcirculation. An in vivo study through laser doppler flowmetry

International Nuclear Information System (INIS)

Nunez, Silvia Cristina

2002-01-01

Blood microcirculation performs an important function in tissue repair process, as well as in pain control, allowing for greater oxygenation of the tissues and the accelerated expulsion of metabolic products, that may be contributing to pain. Low Intensity Laser Therapy (LILT) is widely used to promote healing, and there is an assumption that it is mechanism of action may be due to an enhancement of blood supply. The purpose of this study was to evaluate, using laser Doppler flowmetry (LDF), the stated effects caused by radiation emitted by a He-Ne laser (λ=632.8 nm) on blood microcirculation during tissue repair. To this end, 15 male mice were selected and received a liquid nitrogen provoked lesion, above the dorsal region, and blood flow was measured periodically, during 21 days. Due to radiation emission by the LDF equipment, a control group was established to evaluate possible effects caused by this radiation on microcirculation. To evaluate the He-Ne laser effects, a 1.15 J/cm 2 dose was utilized, with an intensity of 6 mW/cm 2 . The results obtained demonstrate flow alterations, provoked by the lesion, and subsequent inflammatory response. There was no statistical difference between the studied groups. As per the analysis of the results there is no immediate effect due the radiation emitted by a He Ne laser on microcirculation, although a percentage increase was observed in day 7 on medium blood flow rate in irradiated specimens. New studies are necessary to validate the use of this wavelength, in order to promote beneficial alterations in blood supply in radiated areas. (author)

19 CFR 210.77 - Temporary emergency action.

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2010-04-01

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19 CFR 210.47 - Petitions for reconsideration.

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2010-04-01

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19 CFR 210.72 - Confidentiality of information.

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2010-04-01

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2010-04-01

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19 CFR 210.41 - Termination of investigation.

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2010-04-01

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Velocity-Resolved [Ne III] from X-Ray Irradiated Sz 102 Microjets

Science.gov (United States)

Liu, C.-F.; Shang, H.; Walter, F. M.; Herczeg, G. J.

2014-03-01

Neon emission lines are good indicators of high-excitation regions close to a young stellar system because of their high ionization potentials and large critical densities. We have discovered [Ne III] .3869 emission from the microjet of low-mass young star Sz 102. Spectroastrometric analysis of the two-dimensional [Ne III] spectral image obtained from the archival high-dispersion (R - 33,000) Very Large Telescope/UVES spectra suggests that the emission consists of two velocity components spatially separated by ~ 0.''3. The stronger redshifted component is centered at ~ +21 km s-1 with a line width of ~ 140 km s-1, and the weaker blueshifted component at ~ -90 km s-1 with a larger line width of ~ 190 km s-1. Both components have large line widths that extend across the systemic velocity, suggesting their origin from diverging streamlines of a wide-angle wind. Optical line ratio diagnostics indicate that Sz 102 drives a pair of hot (T . 2 ◊ 104 K) and ionized (ne . 2 ◊ 104 cm-3) jets. The blueshifted jet has on average ~ 50% higher temperature and electron density. We suggest that the jet is ionized by an embedded hard X-ray source close to the driving region. Freezing-in of the ionization state is consistent with the flow speed and the Ne2+ recombination timescales. We postulate that these X-rays originate from hard coronae or stellar flares; the hard (keV) X-ray photons ionize neon in the inner wind, while the soft X-rays are mostly absorbed by the accretion funnel. These postulates await validation from high-sensitivity X-ray and subarcsecond resolution optical observations.

Boltzmann equation analysis of electrons swarm parameters and properties of excited particle number densities in Xe/Ne plasmas. Laser absorption effect; Xe/Ne plasma chudenshi yuso keisu narabi ni reiki ryushisu mitsudo tokusei no Boltzmann hoteishiki kaiseki. Laser ko kyushu koka

Energy Technology Data Exchange (ETDEWEB)

Uchida, S.; Sugawara, H.; Ventzek, P.; Sakai, Y. [Hokkaido University, Sapporo (Japan)

1998-06-01

Xe/Ne plasmas are important for plasma display panels and VUV light sources. However, reactions between electrons and excited particles in the mixtures are so complicated that influence of the reactions on the plasma properties is not understood well. In this work, taking account of reactions through which electrons are produced, such as cumulative and Penning ionization, and of transition between excited levels, the electron and excited particle properties in Xe/Ne plasmas are calculated using the Boltzmann equation. The ionization coefficient and electron drift velocity agreed with experimental data. The influence of laser absorption in Xe/Ne plasmas on the plasma properties is also discussed. 25 refs., 15 figs.

Stereodynamics of Ne(3P2) reacting with Ar, Kr, Xe, and N2

Science.gov (United States)

Zou, Junwen; Gordon, Sean D. S.; Tanteri, Silvia; Osterwalder, Andreas

2018-04-01

Stereodynamics experiments of Ne(3P2) reacting with Ar, Kr, Xe, and N2 leading to Penning and associative ionization have been performed in a crossed molecular beam apparatus. A curved magnetic hexapole was used to state-select and polarize Ne(3P2) atoms which were then oriented in a rotatable magnetic field and crossed with a beam of Ar, Kr, Xe, or N2. The ratio of associative to Penning ionization was recorded as a function of the magnetic field direction for collision energies between 320 cm-1 and 500 cm-1. Reactivities are obtained for individual states that differ only in Ω, the projection of the neon total angular momentum vector on the inter-particle axis. The results are rationalized on the basis of a model involving a long-range and a short-range reaction mechanism. Substantially lower probability for associative ionization was observed for N2, suggesting that predissociation plays a critical role in the overall reaction pathway.

Measurement of the vector analysing power of the reaction 19F(p vector,α0)16O in the energy range Esub(p) = 0.45 MeV to 0.85 MeV and studies of the level scheme of the 20Ne nucleus

International Nuclear Information System (INIS)

Traudt, O.

1979-01-01

The experimental study of the reaction 19 F(p,α 0 ) 16 0 was extended by a determination of the analysing power for the reaction in the energy range 454 keV 0 until 160 0 . By averaging of the proton spin angular distributions of the unpolarized cross section were also obtained. The angular distributions of these two observables were fitted by legendre polynomials. The results is a nonneglectable contribution of direct reactions and a new determination of a part of energylevels in 20 Ne. (orig./HSI) [de

IKONIČNE REPREZENTACIJE NEKATERIH MATEMATIČNIH POJMOV PRI OSNOVNOŠOLCIH

OpenAIRE

Podgoršek, Manja

2015-01-01

Ikonične reprezentacije so reprezentacije, ki predstavljajo prehod med enaktivnimi in simbolnimi reprezentacijami. Ikonične reprezentacije matematičnih pojmov na razredni stopnji so v veliki večini primerov grafične. V magistrski nalogi smo s pomočjo preizkusa znanja želeli ugotoviti, na kakšen način učenci od 5. do 8. razreda osnovne šole grafično ponazarjajo vnaprej podane matematične pojme (odštevanje s prehodom, številski izraz z oklepaji, izraz dela celote in potenca). Zanimalo nas je tu...

Assessing enigmatic boulder deposits in NE Aegean Sea: importance of historical sources as tool to support hydrodynamic equations

Directory of Open Access Journals (Sweden)

M. Vacchi

2012-04-01

Full Text Available Due to their importance in the assessment of coastal hazards, several studies have focused on geomorphological and sedimentological field evidence of catastrophic wave impacts related to historical tsunami events. Among them, many authors used boulder fields as important indicators of past tsunamis, especially in the Mediterranean Sea. The aim of this study was to understand the mechanism of deposition of clusters of large boulders, consisting of beachrock slabs, which were found on the southern coasts of Lesvos Island (NE Aegean Sea. Methods to infer the origin of boulder deposits (tsunami vs. storm wave are often based on hydrodynamic models even if different environmental complexities are difficult to be incorporated into numerical models. In this study, hydrodynamic equations did not provide unequivocal indication of the mechanism responsible for boulder deposition in the study area. Further analyses, ranging from geomorphologic to seismotectonic data, indicated a tsunami as the most likely cause of displacement of the boulders but still do not allow to totally exclude the extreme storm origin. Additional historical investigations (based on tsunami catalogues, historical photos and aged inhabitants interviews indicated that the boulders are likely to have been deposited by the tsunami triggered by the 6.7 M_s Chios-Karaburum earthquake of 1949 or, alternatively, by minor effects of the destructive tsunami produced by 1956's Amorgos Island earthquake. Results of this study point out that, at Mediterranean scale, to flank numerical models with the huge amount of the available historical data become a crucial tool in terms of prevention policies related to catastrophic coastal events.

Nivation forms and processes in unconsolidated sediments, NE Greenland

DEFF Research Database (Denmark)

Christiansen, Hanne Hvidtfeldt

1998-01-01

Nivation, Nivation Hollow, Nival Backwall Faliure, Active layer Interflow, Pronival alluvial fans, NE Greenland......Nivation, Nivation Hollow, Nival Backwall Faliure, Active layer Interflow, Pronival alluvial fans, NE Greenland...

KM3NeT

CERN Multimedia

KM3NeT is a large scale next-generation neutrino telescope located in the deep waters of the Mediterranean Sea, optimized for the discovery of galactic neutrino sources emitting in the TeV energy region.

19 CFR 210.31 - Requests for admission.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Requests for admission. 210.31 Section 210.31 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Discovery and Compulsory Process § 210.31 Requests for admission. (a...

Repulsive wall potentials for He-(Ne,Ar,Kr,Xe) as inferred from differential cross sections

International Nuclear Information System (INIS)

Nitz, D.E.; Larson, J.; Swanson, K.; Wildgoose, C.

1993-01-01

We have obtained representations of the He-(Ne,Ar,Kr,Xe) ground state repulsive walls using model potentials optimized to fit published absolute differential cross section data for 500 and 1500 eV collisions. The HeNe potential, like the He 2 potentials can be fit using the semi-empirical HFD-B form constrained to cross zero at the proper internuclear separation. For the heavier atoms, this approach is unsuccessful and superior fits are obtained using only the purely repulsive V(r) - A EXP [-αr - βr 2 ] term of the HFD-B potential. Comparison of fitted potentials with previous results will be presented

Measurement of the response of the deuterated scintillators NE 232 and NE 230 to protons and deuterons

International Nuclear Information System (INIS)

Tornow, W.; Arnold, W.; Herdtweck, J.; Mertens, G.

1986-01-01

The response of the deuterated scintillators NE 232 and NE 230 to protons and deuterons has been measured via elastic neutron-proton and neutron-deuteron scattering using the two mixtures of C 6 H 12 /C 6 D 12 and C 6 H 6 /C 6 D 6 and ''pure'' scintillators. The energy range covered for protons and deuterons was about 1-16 MeV. The light output relation Lsub(p)(E)=(1/2)Lsub(d) (2E) has been observed. (orig.)

Fragmentation dynamics of ionized neon clusters (Ne(n), n=3-14) embedded in helium nanodroplets.

Science.gov (United States)

Bonhommeau, David; Halberstadt, Nadine; Viel, Alexandra

2006-01-14

We report a theoretical study of the nonadiabatic fragmentation dynamics of ionized neon clusters embedded in helium nanodroplets for cluster sizes up to n=14 atoms. The dynamics of the neon atoms is modeled using the molecular dynamics with quantum transitions method of Tully [J. Chem. Phys. 93, 1061 (1990)] with the nuclei treated classically and transitions between electronic states quantum mechanically. The potential-energy surfaces are derived from a diatomics-in-molecules model to which induced dipole-induced dipole interactions are added. The effect of the spin-orbit interaction is also discussed. The helium environment is modeled by a friction force acting on charged atoms whose speed exceeds the critical Landau velocity. The dependence of the fragment size distribution on the friction strength and on the initial nanodroplet size is investigated. By comparing with the available experimental data obtained for Ne3+ and Ne4+, a reasonable value for the friction coefficient, the only parameter of the model, is deduced. This value is then used to predict the effect of the helium environment on the dissociation dynamics of larger neon clusters, n=5-14. The results show stabilization of larger fragments than in the gas phase, but fragmentation is not completely caged. In addition, two types of dynamics are characterized for Ne4+: fast and explosive, therefore leaving no time for friction to cool down the process when dynamics starts on one of the highest electronic states, and slower, therefore leading to some stabilization by helium when it starts on one of the lowest electronic states.

The Importance of Partnerships in State Financial Aid Research

Science.gov (United States)

Pingel, Sarah; Weeden, Dustin

2017-01-01

In this essay, we explore the importance of state financial aid programs for both states and the students they serve. Effective state financial aid policy benefits from rigorous research that engages partners from a variety of roles, such as state agencies, legislative staff, and intermediary organizations. It also benefits from the engagement of…

19 CFR 212.21 - Answer to application.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Answer to application. 212.21 Section 212.21 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT Procedures for Considering Applications § 212.21...

19 CFR 210.73 - Review of reports.

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2010-04-01

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19 CFR 212.05 - Standards for awards.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Standards for awards. 212.05 Section 212.05 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT General Provisions § 212.05 Standards for awards...

19 CFR 210.23 - Suspension of investigation.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Suspension of investigation. 210.23 Section 210.23 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Motions § 210.23 Suspension of investigation. Any party may move to...

19 CFR 212.04 - Eligibility of applicants.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Eligibility of applicants. 212.04 Section 212.04 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT General Provisions § 212.04 Eligibility of...

19 CFR 212.10 - Contents of application.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Contents of application. 212.10 Section 212.10 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT Information Required From Applicants § 212.10...

{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.

Growth of single crystals of BaFe12O19 by solid state crystal growth

Science.gov (United States)

Fisher, John G.; Sun, Hengyang; Kook, Young-Geun; Kim, Joon-Seong; Le, Phan Gia

2016-10-01

Single crystals of BaFe12O19 are grown for the first time by solid state crystal growth. Seed crystals of BaFe12O19 are buried in BaFe12O19+1 wt% BaCO3 powder, which are then pressed into pellets containing the seed crystals. During sintering, single crystals of BaFe12O19 up to ∼130 μm thick in the c-axis direction grow on the seed crystals by consuming grains from the surrounding polycrystalline matrix. Scanning electron microscopy-energy dispersive spectroscopy analysis shows that the single crystal and the surrounding polycrystalline matrix have the same chemical composition. Micro-Raman scattering shows the single crystal to have the BaFe12O19 structure. The optimum growth temperature is found to be 1200 °C. The single crystal growth behavior is explained using the mixed control theory of grain growth.

Photo-double ionisation of the Ne 2s studied in equal-energy-sharing condition at 20 eV above threshold

Energy Technology Data Exchange (ETDEWEB)

Bolognesi, P. [CNR-IMIP, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo (Italy); Otranto, S. [CONICET and Depto. de Fisica, Universidad Nacional del Sur, 8000 Bahia Blanca (Argentina); Garibotti, C.R. [CONICET and Centro Atomico Bariloche, 8400 S.C. de Bariloche (Argentina); Flammini, R. [CNR-IMIP, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo (Italy); Alberti, G. [CNR-IMIP, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo (Italy); Avaldi, L. [CNR-IMIP, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo (Italy)]. E-mail: lorenzo.avaldi@imip.cnr.it

2005-06-15

The triple differential cross-section (TDCS) for the photo-double ionisation of Ne leading to the Ne{sup 2+}(2s{sup -2}2p{sup 6}) has been measured 20 eV above threshold in equal-energy-sharing conditions. The results are compared with the recently introduced SC3 model, which can be used to study targets different from He since it allows an easy implementation with different initial-state wavefunctions.

19 CFR 210.8 - Commencement of preinstitution proceedings.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Commencement of preinstitution proceedings. 210.8 Section 210.8 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Commencement of Preinstitution Proceedings and...

19 CFR 210.20 - Declassification of confidential information.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Declassification of confidential information. 210.20 Section 210.20 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Motions § 210.20 Declassification of...

INVESTIGATING THE OPINIONS OF MoNE STAFF ABOUT INSET PROGRAMS VIA DISTANCE EDUCATION

Directory of Open Access Journals (Sweden)

Rasit OZEN

2009-10-01

Full Text Available The aim of this study is to investigate the opinions of the Ministry of National Education (MoNE staff about in-service training (INSET programs via distance education. The subjects of this study were the staff (n=15 of the Inservice Training Department of MoNE in 2008. During the study, the qualitative data were collected through semi-structured interviews held with the (MoNE staff by the researcher. The results of the interviews revealed the importance of needs assessment, the relationship between INSET program course content and participants’ school curriculum, support mechanism in INSET programs via distance education, the application of what is learned and providing various opportunities to them that lead to their active involvement to the application of these programs, the characteristics of learning environments for these programs, INSET instructors’ teaching competencies and skills to fulfill various roles in online learning environments, of measuring and evaluating the performance of teachers during INSET programs via distance education and of the effectiveness of INSET programs via distance education.

19 CFR 10.711 - Imported directly.

Science.gov (United States)

2010-04-01

... ARTICLES CONDITIONALLY FREE, SUBJECT TO A REDUCED RATE, ETC. United States-Jordan Free Trade Agreement... lading, airway bills, packing lists, commercial invoices, receiving and inventory records, and customs...

19 CFR 10.777 - Imported directly.

Science.gov (United States)

2010-04-01

... ARTICLES CONDITIONALLY FREE, SUBJECT TO A REDUCED RATE, ETC. United States-Morocco Free Trade Agreement... bills, packing lists, commercial invoices, receiving and inventory records, and customs entry and exit...

19 CFR 10.817 - Imported directly.

Science.gov (United States)

2010-04-01

... ARTICLES CONDITIONALLY FREE, SUBJECT TO A REDUCED RATE, ETC. United States-Bahrain Free Trade Agreement... bills, packing lists, commercial invoices, receiving and inventory records, and customs entry and exit...

19 CFR 212.11 - Net worth exhibit.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Net worth exhibit. 212.11 Section 212.11 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT Information Required From Applicants § 212.11 Net worth exhibit...

Chapter 43: Assessment of NE Greenland: Prototype for development of Circum-ArcticResource Appraisal methodology

Science.gov (United States)

Gautier, D.L.; Stemmerik, L.; Christiansen, F.G.; Sorensen, K.; Bidstrup, T.; Bojesen-Koefoed, J. A.; Bird, K.J.; Charpentier, R.R.; Houseknecht, D.W.; Klett, T.R.; Schenk, C.J.; Tennyson, Marilyn E.

2011-01-01

Geological features of NE Greenland suggest large petroleum potential, as well as high uncertainty and risk. The area was the prototype for development of methodology used in the US Geological Survey (USGS) Circum-Arctic Resource Appraisal (CARA), and was the first area evaluated. In collaboration with the Geological Survey of Denmark and Greenland (GEUS), eight "assessment units" (AU) were defined, six of which were probabilistically assessed. The most prospective areas are offshore in the Danmarkshavn Basin. This study supersedes a previous USGS assessment, from which it differs in several important respects: oil estimates are reduced and natural gas estimates are increased to reflect revised understanding of offshore geology. Despite the reduced estimates, the CARA indicates that NE Greenland may be an important future petroleum province. ?? 2011 The Geological Society of London.

19 CFR 12.106 - Importation prohibited.

Science.gov (United States)

2010-04-01

... TREASURY SPECIAL CLASSES OF MERCHANDISE Pre-Columbian Monumental and Architectural Sculpture and Murals... architectural sculpture or mural which is exported (whether or not such exportation is to the United States...

19 CFR 210.4 - Written submissions; representations; sanctions.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Written submissions; representations; sanctions. 210.4 Section 210.4 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Rules of General Applicability § 210.4...

19 CFR 210.74 - Modification of reporting requirements.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Modification of reporting requirements. 210.74 Section 210.74 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Enforcement Procedures and Advisory Opinions § 210.74...

19 CFR 210.36 - General provisions for hearings.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false General provisions for hearings. 210.36 Section 210.36 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Prehearing Conferences and Hearings § 210.36 General...

19 CFR 210.61 - Discovery and compulsory process.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Discovery and compulsory process. 210.61 Section 210.61 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.61 Discovery and compulsory...

19 CFR 210.27 - General provisions governing discovery.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false General provisions governing discovery. 210.27 Section 210.27 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Discovery and Compulsory Process § 210.27 General...

19 CFR 210.49 - Implementation of Commission action.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Implementation of Commission action. 210.49 Section 210.49 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Determinations and Actions Taken § 210.49...

19 CFR 201.19 - Notification regarding requests for confidential business information.

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2010-04-01

... business information. 201.19 Section 201.19 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION GENERAL RULES OF GENERAL APPLICATION Availability of Information to the Public Pursuant to 5 U.S.C. 552 § 201.19 Notification regarding requests for confidential business information. (a) In general. Business...

19 CFR 210.1 - Applicability of part.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Applicability of part. 210.1 Section 210.1 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE..., and 1337) and sections 2 and 1342(d)(1)(B) of the Omnibus Trade and Competitiveness Act of 1988, Pub...

19 CFR 145.32 - Bona-fide gifts.

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2010-04-01

... 19 Customs Duties 2 2010-04-01 2010-04-01 false Bona-fide gifts. 145.32 Section 145.32 Customs... (CONTINUED) MAIL IMPORTATIONS Special Classes of Merchandise § 145.32 Bona-fide gifts. The port director... as bona-fide gifts from persons in foreign countries to persons in the United States having an...

Comparison of Ne and Ar seeded radiative divertor plasmas in JT-60U

Energy Technology Data Exchange (ETDEWEB)

Nakano, T., E-mail: nakano.tomohide@jaea.go.jp

2015-08-15

In H-mode plasmas with Ne, Ar and a mixture of Ne and Ar injection, the divertor radiation power fractions amongst these impurities in addition to an intrinsic impurity, C, are investigated. In plasmas with the inner divertor plasma attached, carbon is the biggest radiator, whichever impurity, Ne, Ar or a mixture of Ar and Ne is injected. In contrast, in plasmas with the inner divertor plasma detached, Ne is the biggest radiator due to a significantly high recombination radiation from Ne VIII. Ar is always a minor contributor in plasmas with the inner divertor both attached and detached.

State Reforms in the Field of Education in Russia (Late 18th-Early 19th Centuries

Directory of Open Access Journals (Sweden)

Nataliya M. Rumyantseva

2018-03-01

Full Text Available The article examines the state policy of Russia in the field of education during the late 18th - early 19th centuries. This period is characterized by a great democratization of education and the definition of new goals, objectives and content of education: the professional training of a young person becomes inseparable from the education of a citizen - a patriot of a state and a broadly enlightened personality in different sciences. The paper analyzed historical documents (orders of Russian emperors concerning public education, school and university statutes, historical references. In the chronological order, state reforms in the field of education in Russia were constructed and characterized at the end of the 18th and the beginning of the 19th centuries, the statistical data on the number of pupils, teachers and schools within the period under review were presented.

Food truck som ett nytt fenomen i Skåne

OpenAIRE

Fromell, Hilda; Winter, Regina

2016-01-01

Food truck is a mobile restaurant business which originates from the United States, and can now be seen also in Sweden. There are specific guidelines regarding the food that are served from the food trucks rolling the streets of Skåne from 2013. For example the food should be ecological, which is in keeping with the other municipal goals regarding food and meal. The concept is communicated and marketed through social media, which makes it possible to effectively reach many people. Four food t...

Cloud amount/frequency, NITRATE and other data from NEW HORIZON in the NE Pacific from 1989-08-19 to 1989-09-01 (NODC Accession 9200079)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — The Conductivity, Temperature and Depth (CTD) and other data were collected in NE Pacific (limit-180) as part of Fieberling Seamount project. Data was collected from...

Vibrational-state-selected ion--molecule reaction cross sections at thermal energies

NARCIS (Netherlands)

Pijkeren, D. van; Boltjes, E.; Eck, J. van; Niehaus, A.

1984-01-01

A method designed to measure relative ion—molecule reaction rates at thermal collision energies for selected reactant ion vibrational states is described. Relative reaction rates are determined for the three endothermic reactions: H2+ (υ)(He,H)HeH+, H2+ (υ)(Ne,H)NeH+, D2+(υ)(Ne, D)NeD+, and for the

Imaging the electron transfer reaction of Ne2+ with Ar using position-sensitive coincidence spectroscopy

International Nuclear Information System (INIS)

Harper, Sarah M; Hu Wanping; Price, Stephen D

2002-01-01

A new experiment, employing position-sensitive detection coupled with time-of-flight mass spectrometry, has been used to investigate the single-electron transfer reaction between Ne 2+ and Ar by detecting the resulting pairs of singly charged ions in coincidence. The experimental technique allows the determination of the individual velocity vectors of the ionic products, in the centre-of-mass frame, for each reactive event detected. The experiments show that forward scattering dominates the reactivity, although a bimodal angular distribution is apparent. In addition, the spectra show that at laboratory frame collision energies from 4-14 eV the reactivity is dominated by Ne 2+ (2p 4 , 3 P) accepting an electron from an argon atom to form the ground state of Ne + together with an Ar + ion in an excited electronic level, predominantly arising from the Ar + (3s 2 3p 4 3d) configuration. The form of this reactivity, and the differences between the reactivity observed in these experiments and those performed at higher collision energies, are well reproduced by Landau-Zener theory

Radiative corrections to the hadronic cross-section measurement at DA{phi}NE

Energy Technology Data Exchange (ETDEWEB)

Khoze, V.A. [Durham Univ. of Durham, Durham (United Kingdom). Dept. of Physics; Konchatnij, M.I.; Merenkov, NP.; Shekhovzova, O.N. [National Science Centre Kharkov Institute of Physics and Technology, Karkhov (Ukraine); Pancheri, G. [Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Frascati, RM (Italy); Trentadue, L. [Parma Univ., Parma (Italy). Dipt. di Fisica

2000-07-01

The hadronic invariant mass distribution for the process of electron--positron annihilation into a pair of charged pions accompanied by a photon radiated from the initial state has been studied for the region of DA{phi}NE energies. The Born cross-section and the electromagnetic radiative corrections to it are calculated for realistic conditions of the KLOE detector. The dependence on the physical parameters which define the event selection is obtained.

19 CFR 213.5 - Access to Commission resources.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Access to Commission resources. 213.5 Section 213.5 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE TRADE REMEDY ASSISTANCE § 213.5 Access to Commission resources. Commission resources, in...

19 CFR 210.51 - Period for concluding investigation.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Period for concluding investigation. 210.51 Section 210.51 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Determinations and Actions Taken § 210.51 Period for...

THE MIGRATION OF EUROPEANS TO THE UNITED STATES AT THE MIDDLE OF THE 19TH CENTURY – THE IRISH AND GERMAN WAVE

Directory of Open Access Journals (Sweden)

Sorin-Stefan Maha

2011-12-01

Full Text Available This article analyses the contribution of the second wave of immigrants to the United States to the formation of the young American people. Unlike other states, the USA is a nation founded on waves of immigrants coming from different parts of the world. This paper includes the second wave of immigrants in US history in the four waves and presents the migration of the Irish and Germans to the USA at the middle of the 19th century. They had an important contribution to the increase of American population and were a source of consumption and workforce for agriculture and various industries.

A contribution to the study of excited states of Neon 22 and Sodium 22

International Nuclear Information System (INIS)

Chambon, Bernard.

1976-01-01

The experimental study of 22 Ne has been performed. A differentially pump gas target has been used, in conjunction with E+ΔE detectors. Angular distribution measurements have been performed on the 21 Ne(d,p) 22 Ne reaction in the Esub(d) energy range from 3 to 3.6MeV. Angular momentum has been identified and spectroscopic factors extracted for 18 levels by comparison with DWBA predictions. Spin and parities of some excited levels were deduced. The study of the 21 Ne(t,d) 22 Ne reaction corroborates the results concerning the first excited state (2 + ). Experimental results are compared with the predictions of the unified rotational model and of the shell-model. The 20 Ne(t,p) 22 Ne reaction was studied at 3MeV and 3.4MeV bombarding energies. The total cross-section of most groups was analyzed in terms of Hauser-Feshbach theory and several final-state spin predictions are made. The angular distribution of the 20 Ne(t,p) 22 Ne (Esub(x)=6.24MeV) reaction was analyzed by double stripping DWBA theory and indicates 0 + for this state, the isobaric analog of which has been identified at 6.83MeV in 22 Na. Furthermore, several new isobaric analog pairs in 22 Na and 22 Ne are identified via the study of excitation functions for the reactions 21 Ne(p,p) 21 Ne and 21 Ne(p,p') 21 Ne for Esub(p)=0.6-2MeV. Implications of the present results with regard to the identification of band structure in 22 Na are discussed [fr

49 CFR 565.14 - Motor vehicles imported into the United States.

Science.gov (United States)

2010-10-01

... 49 Transportation 6 2010-10-01 2010-10-01 false Motor vehicles imported into the United States...) REQUIREMENTS VIN Requirements § 565.14 Motor vehicles imported into the United States. (a) Importers shall utilize the VIN assigned by the original manufacturer of the motor vehicle. (b) All passenger cars...

Quantifying the importance of MSP1-19 as a target of growth-inhibitory and protective antibodies against Plasmodium falciparum in humans.

Directory of Open Access Journals (Sweden)

Danny W Wilson

Full Text Available BACKGROUND: Antibodies targeting blood stage antigens are important in protection against malaria, but the key targets and mechanisms of immunity are not well understood. Merozoite surface protein 1 (MSP1 is an abundant and essential protein. The C-terminal 19 kDa region (MSP1-19 is regarded as a promising vaccine candidate and may also be an important target of immunity. METHODOLOGY/FINDINGS: Growth inhibitory antibodies against asexual-stage parasites and IgG to recombinant MSP1-19 were measured in plasma samples from a longitudinal cohort of 206 children in Papua New Guinea. Differential inhibition by samples of mutant P. falciparum lines that expressed either the P. falciparum or P. chabaudi form of MSP1-19 were used to quantify MSP1-19 specific growth-inhibitory antibodies. The great majority of children had detectable IgG to MSP1-19, and high levels of IgG were significantly associated with a reduced risk of symptomatic P. falciparum malaria during the 6-month follow-up period. However, there was little evidence of PfMSP1-19 specific growth inhibition by plasma samples from children. Similar results were found when testing non-dialysed or dialysed plasma, or purified antibodies, or when measuring growth inhibition in flow cytometry or microscopy-based assays. Rabbit antisera generated by immunization with recombinant MSP1-19 demonstrated strong MSP1-19 specific growth-inhibitory activity, which appeared to be due to much higher antibody levels than human samples; antibody avidity was similar between rabbit antisera and human plasma. CONCLUSIONS/SIGNIFICANCE: These data suggest that MSP1-19 is not a major target of growth inhibitory antibodies and that the protective effects of antibodies to MSP1-19 are not due to growth inhibitory activity, but may instead be mediated by other mechanisms. Alternatively, antibodies to MSP1-19 may act as a marker of protective immunity.

Impacts of Sea-Level Rise and Human Activity on a Tropical Continental Shelf, RN State, NE Brazil

Science.gov (United States)

Vital, H.; Barros Pereira, T. R.; Lira, H. F.; Tabosa, W. F.; Eichler, P.; Stattegger, K.; Sen Gupta, B. K.; Gomes, M. P.; Nogueira, M. L. D. S.; Pierri, G. C. S.

2014-12-01

The northeastern Brazilian, tropical coast-shelf system along the Atlantic Ocean is a sediment-starved zone, because of low relief, small drainage basins, and a semiarid climate. This work presents the major results of a study of environmental changes, particularly those related to Holocene sea-level rise, affecting the coast and shallow waters of Rio Grande do Norte (RN) State, NE Brazil. The methods included bottom-sediment characterization, bioindicator tracking, and integrated shallow-water geophysical investigation. This coastline is marked by active sea cliffs carved into tablelands alternating with reef- or dune-barrier sections, beach rocks and lagoons, whereas the shelf is a narrow, very shallow, and highly energetic system. Overall, the area is under the natural influence of tides (with a semidiurnal mesotidal regime) and the anthropogenic influence of salt exploration, oil industry, shrimp farms, tourism, and wind-farms. Sedimentation during the Holocene has been controlled mainly by sea-level variation, longshore currents, and the advance and westward propagation of active dunes along the coast. As in other areas around the world, growing numbers of permanent and seasonal residents choose to live at or near the ocean. Coastal erosion is a cause for concern along many Brazilian beaches, and several erosion hot spots are already recognized in RN State. Curves of Holocene relative sea-level variation were established for RN State, but the absence of long-term oceanographic observations in the last centuries or that of detailed altimetry maps hinders the evaluation of different risk scenarios at the local level. Nevertheless, impacts of the current sea-level rise and human activity can be observed along the RN coastal-shelf system. Particular aspects of the study, such as oil-spill monitoring, coastal-water sewage contamination, and coastal erosion, will be highlighted.

Cholera in Pregnancy: Outcomes from a Specialized Cholera Treatment Unit for Pregnant Women in L?og?ne, Haiti

OpenAIRE

Ciglenecki, Iza; Bichet, Mathieu; Tena, Javier; Mondesir, Erneau; Bastard, Mathieu; Tran, Nguyen-Toan; Antierens, Annick; Staderini, Nelly

2013-01-01

BACKGROUND: The association between cholera in pregnancy and negative fetal outcome has been described since the 19(th) century. However, there is limited published literature on the subject. We describe pregnancy outcomes from a specialized multidisciplinary hospital unit at the onset of a large cholera outbreak in Haiti in 2010 and 2011. METHODS: Pregnant women with cholera were hospitalized in a specialized unit within the MSF hospital compound in Léogâne and treated using standard cholera...

A theoretical study on electronic predissociation in the NeBr2 van der Waals molecule

International Nuclear Information System (INIS)

Hernández-Lamoneda, Ramón; Sanz-Sanz, Cristina; Roncero, Octavio; Pio, Jordan M.; Taylor, Molly A.; Janda, Kenneth C.

2012-01-01

Graphical abstract: What is the chance that the Rg atom induces electronic coupling before it is ejected by vibrational predissociation? How does the competition depend on the initial vibrational level? Ab initio curve couplings are used in a wave packet calculation to successfully simulate experimental results. Highlights: ► We perform ab initio calculations of NeBr 2 PES’s in valence excited states. ► The ab initio PES’s and couplings are used in subsequent WP calculations. ► These WP calculations model the competition between EP and VP. ► The WP results using the ab initio data agree well with experimental results. - Abstract: We present the first comprehensive ab initio study of the Ne–Br 2 potential energy surfaces and the non-adiabatic couplings between the valence excited electronic states. These ab initio results are used to obtain 3-D approximate potentials for each electronic state, and these potentials are used in a wave packet calculation of the competing electronic predissociation and vibrational predissociation dynamics. The results of this calculation are in excellent agreement with both experimental results and a previous empirical fit to the experiments. The calculations allow us to observe not only the competition between vibrational and electronic dynamics for the dimer, but also the competition between two different electronic channels. Coupling to the 2 g state dominates for the levels studied here, but coupling to the C state is progressively more important for low vibrational levels, and may dominate at levels below which the current results pertain. The ability of ab initio surfaces and couplings to so accurately reproduce experimental data raises the hope of a complete understanding of the VP and EP dynamics for other Rg-halogen dimers. Success in the case presented here is largely due to the fact that the VP dynamics for the vibrational levels in this study are in the simple, direct regime. Understanding the simple case so

19 CFR 210.57 - Amendment of the motion.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Amendment of the motion. 210.57 Section 210.57 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.57 Amendment of the motion. A motion for...

19 CFR 210.65 - Certification of the record.

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19 CFR 210.53 - Motion filed after complaint.

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2010-04-01

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19 CFR 210.55 - Content of service copies.

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2010-04-01

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DAΦNE Control System status and performance

International Nuclear Information System (INIS)

Di Pirro, G.; Drago, A.; Mazzitelli, G.; Milardi, C.; Sannibale, F.; Stecchi, A.; Stella, A.

1998-01-01

The DAΦNE Control System allowed the step by step commissioning of the major subsystems as they were installed, proving to be modular and extensible. Recently the guidelines of the Control System evolution concerned the development of machine operational procedures and the integration of diagnostic tools. Particular attention has been reserved to the problem of saving and restoring element data sts as well as to the DAΦNE general data handling. A system overview including installation status, features, and operation results is presented

19. working group meeting of representatives of RCA member States. Report

International Nuclear Information System (INIS)

1997-03-01

The 19. RCA Working Group Meeting was hosted by the Myanmar Atomic Energy Committee in Yangon from 10-14 March 1997. The meeting marked the 25. anniversary of the RCA which commenced in 1972. It was attended by 29 delegates from 15 visiting RCA Member States, 15 participants from Myanmar and 4 from the IAEA. The report contains the statements of the following countries: Australia, Bangladesh, China, India, Indonesia, Japan, Republic of Korea, Malaysia, Mongolia, Myanmar, New Zealand, Pakistan, Philippines, Singapore, Sri Lanka, Thailand, and Viet Nam. Tabs

19. working group meeting of representatives of RCA member States. Report

Energy Technology Data Exchange (ETDEWEB)

NONE

1997-03-01

The 19. RCA Working Group Meeting was hosted by the Myanmar Atomic Energy Committee in Yangon from 10-14 March 1997. The meeting marked the 25. anniversary of the RCA which commenced in 1972. It was attended by 29 delegates from 15 visiting RCA Member States, 15 participants from Myanmar and 4 from the IAEA. The report contains the statements of the following countries: Australia, Bangladesh, China, India, Indonesia, Japan, Republic of Korea, Malaysia, Mongolia, Myanmar, New Zealand, Pakistan, Philippines, Singapore, Sri Lanka, Thailand, and Viet Nam. Tabs.

Nuclide Importance and the Steady-State Burnup Equation

International Nuclear Information System (INIS)

Sekimoto, Hiroshi; Nemoto, Atsushi

2000-01-01

Conventional methods for evaluating some characteristic values of nuclides relating to burnup in a given neutron spectrum are reviewed in a mathematically systematic way, and a new method based on the importance theory is proposed. In this method, these characteristic values of a nuclide are equivalent to the importances of the nuclide. By solving the equation adjoint to the steady-state burnup equation with a properly chosen source term, the importances for all nuclides are obtained simultaneously.The fission number importance, net neutron importance, fission neutron importance, and absorbed neutron importance are evaluated and discussed. The net neutron importance is a measure directly estimating neutron economy, and it can be evaluated simply by calculating the fission neutron importance minus the absorbed neutron importance, where only the absorbed neutron importance depends on the fission product. The fission neutron importance and absorbed neutron importance are analyzed separately, and detailed discussions of the fission product effects are given for the absorbed neutron importance

Dielektrične lastnosti vodnih raztopin nekaterih mono- in polisaharidov

OpenAIRE

Gubenšek, Špela

2017-01-01

V magistrskem delu smo raztopinam različnih saharidov določali dielektrične lastnosti. Analizirali smo vodne raztopine glukoze, fruktoze, inulina, dekstrina, maltodekstrina, oligofruktoze in glukozno-fruktoznega sirupa. Saharide smo okarakterizirali tako, da smo določili njihove reducirajoče lastnosti in v glukozno-fruktoznem sirupu delež fruktoze. Za določanje dielektrične konstante v območju frekvenc izmenične napetosti med 20 kHz in 2 MHz smo uporabili kapacitivno metodo in LCR merilnik. ...

Desktop Video: Multi-Media on the NeXT Computer.

Science.gov (United States)

Stammen, Ronald M.; Richardson, Jolene

A new course, Independent Study Research and Writing via Telecommunications, is being developed by the Division of Independent Study (DIS) of the North Dakota Department of Public Instruction to teach telepublishing skills utilizing the NeXT telecommunicating (interpersonal computing) techniques, i.e., NeXT Mail. This multimedia electronic-mail…

19 CFR 212.02 - When the Act applies.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false When the Act applies. 212.02 Section 212.02 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT General Provisions § 212.02 When the Act applies...

Experimental study of the 22Ne(p,γ)23Na reaction and its implications for novae scenarios

International Nuclear Information System (INIS)

Menzel, Marie-Luise

2013-01-01

The 22 Ne(p,γ) 23 Na reaction belongs to the catalytic neon-sodium cycle and has an important role in the explosive hydrogen burning. The neon-sodium cycle takes place at temperatures of T = 0.1 - 0.5 GK and is assumed to occur in different astrophysical systems: e.g. in novae, in super novae of type Ia and during the shell-burning of red giant branch stars. The implications of 22 Ne(p,γ) 23 Na and the neon-sodium cycle in a nova scenario have been studied by using the nuclear network code libnucnet at GSI in Darmstadt. A nova is an outburst of matter in a binary system consisting of a white dwarf and a red giant star. It is therefore a representative phenomenon for explosive hydrogen burning. For the calculation of the nucleosynthesis during the nova outburst, the code libnucnet requires the initial mass composition of the novae partners, the temperature and density profiles of the nova explosion and the thermonuclear reaction rates of the participating reactions. In the following, the code determined the flow and the final atomic abundance in the neon-sodium cycle during the entire nova process. Additionally, the influence of the temperature profile of the novae outburst as well as the thermonuclear reaction rate of the 22 Ne(p,γ) 23 Na reaction on the final atomic abundance in the outburst has been studied. A characteristic measure for the reactions in astrophysical environments is the thermonuclear reaction rate. The reaction rate of 22 Ne(p,γ) 23 Na has still strong uncertainties in the temperature range of T = 0.03 - 0.3 GK. These uncertainties are based on insufficient upper limits of the resonance strengths as well as the possible existence of tentative states that are populated in the energy range of E lab p = 30 - 300 keV. The research presented in this thesis is dedicated to the experimental study of the 22 Ne(p,γ) 23 Na reaction for an improved determination of the thermonuclear reaction rate. Furthermore, the implications of 22 Ne(p,γ) 23 Na and

19 CFR 210.48 - Disposition of petitions for reconsideration.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Disposition of petitions for reconsideration. 210.48 Section 210.48 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Determinations and Actions Taken § 210.48...

Interaction of Ne(2p54p), Ar(3p54p) and Kr(4p55p) excited atoms with He and Ne atoms. Processes of collisional depolarization

International Nuclear Information System (INIS)

Zagrebin, A.L.; Lednev, M.G.

1990-01-01

Quasimolecular terms Ne(2p 5 4p)+He, Ar(3p 5 4p)+He,Ne and Kr(4p 5 5p)+He,Ne are calculated within the framework of one-configuration method of effective Hamiltonian. The results of calculations agree with the experimental data

Van der Waals bond in dimers: H2Ne, H2Ar, H2Kr

International Nuclear Information System (INIS)

Waaijer, M.

1981-01-01

The H 2 -inert gas dimers H 2 X, and particularly H 2 Ne, H 2 Ar and H 2 Kr, form the subject of this thesis and are loosely bound van der Waals complexes, which is reflected in the low number of bound states and the small anisotropic interaction. The H 2 X dimers studied are formed in a supersonic nozzle expansion, in which the internal energy is converted into the macroscopic flow energy, establishing an internal temperature drop to 3 K, which favours dimer formation. Because of this cooling the H 2 X dimers relax to the lowest rotational states. The hyperfine transitions have been measured using magnetic beam resonance and yield information about the isotropic as well as the anisotropic intermolecular potential in the range between the classical turning points and in the adjacent part of the repulsive branch. The sensitivity of the method is very high and slight changes in the intermolecular potential cause significant effects. The analysis of the measured hyperfine transitions incorporates all interacting states of the molecule, bound as well as unbound (continuum) states. For H 2 Ne, which is the best studied H 2 -inert gas system from the experimental point of view, the author succeeded in establishing an intermolecular potential, that provides a solid ground for comparison with future ab initio calculations. (Auth.)

19 CFR 360.104 - Steel import monitoring.

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2010-04-01

... ANALYSIS SYSTEM § 360.104 Steel import monitoring. (a) Throughout the duration of the licensing requirement... include import quantity (metric tons), import Customs value (U.S. $), and average unit value ($/metric ton... and will also present a range of historical data for comparison purposes. Provision of this aggregate...

Searches for New Physics at MiniBooNE: Sterile Neutrinos and Mixing Freedom

Energy Technology Data Exchange (ETDEWEB)

Karagiorgi, Georgia S. [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

2010-09-01

The MiniBooNE experiment was designed to perform a search for v_μ → v_e oscillations in a region of Δm² and sin² 2θ very different from that allowed by standard, three-neutrino oscillations, as determined by solar and atmospheric neutrino experiments. This search was motivated by the LSND experimental observation of an excess of $\\bar{v}$_e events in a $\\bar{v}$_μ beam which was found compatible with two-neutrino oscillations at Δm² ~ 1 eV² and sin² 2{theta} < 1%. If confirmed, such oscillation signature could be attributed to the existence of a light, mostly-sterile neutrino, containing small admixtures of weak neutrino eigenstates. In addition to a search for v_μ → v_e oscillations, MiniBooNE has also performed a search for v_μ → v_e oscillations, which provides a test of the LSND two-neutrino oscillation interpretation that is independent of CP or CPT violation assumptions. This dissertation presents the MiniBooNE v_μ → v_e and v_μ → v_e analyses and results, with emphasis on the latter. While the neutrino search excludes the two-neutrino oscillation interpretation of LSND at 98% C.L., the antineutrino search shows an excess of events which is in agreement with the two-neutrino v_μ → v_e oscillation interpretation of LSND, and excludes the no oscillations hypothesis at 96% C.L. Even though the neutrino and antineutrino oscillation results from MiniBooNE disagree under the single sterile neutrino oscillation hypothesis, a simple extension to the model to include additional sterile neutrino states and the possibility of CP violation allows for differences between neutrino and antineutrino oscillation signatures. In view of that, the viability of oscillation models with one or two sterile neutrinos is investigated in global fits to MiniBooNE and LSND

Equation of motion approach for describing allowed transitions in Ne and Al3+ under classical and quantum plasmas

Science.gov (United States)

Chaudhuri, Supriya K.; Mukherjee, Prasanta K.; Chaudhuri, Rajat K.; Chattopadhyay, Sudip

2018-04-01

The equation of motion coupled cluster methodology within relativistic framework has been applied to analyze the electron correlation effects on the low lying dipole allowed excited states of Ne and Al3+ under classical and quantum plasma environments. The effect of confinement due to classical plasma has been incorporated through screened Coulomb potential, while that of quantum plasma has been treated by exponential cosine screened Coulomb potential. The confined structural properties investigated are the depression of ionization potential, low lying excitation energies (dipole allowed), oscillator strengths, transition probabilities, and frequency dependent polarizabilities under systematic variation of the plasma-atom coupling strength determined through the screening parameter. Specific atomic systems are chosen for their astrophysical importance and availability of experimental data related to laboratory plasma with special reference to Al3+ ion. Here, we consider 1 s22 s22 p6(1S0)→1 s22 s22 p5 n s /n d (1P1) (n =3 ,4 ) dipole allowed transitions of Ne and Al3+. Results for the free (isolated) atomic systems agree well with those available in the literature. Spectroscopic properties under confinement show systematic and interesting pattern with respect to plasma screening parameter.

Net sputtering rate due to hot ions in a Ne-Xe discharge gas bombarding an MgO layer

International Nuclear Information System (INIS)

Ho, S.; Tamakoshi, T.; Ikeda, M.; Mikami, Y.; Suzuki, K.

2011-01-01

An analytical method is developed for determining net sputtering rate for an MgO layer under hot ions with low energy ( h i , above a threshold energy of sputtering, E th,i , multiplied by a yield coefficient. The threshold energy of sputtering is determined from dissociation energy required to remove an atom from MgO surface multiplied by an energy-transfer coefficient. The re-deposition rate of the sputtered atoms is calculated by a diffusion simulation using a hybridized probabilistic and analytical method. These calculation methods are combined to analyze the net sputtering rate. Maximum net sputtering rate due to the hot neon ions increases above the partial pressure of 4% xenon as E h Ne becomes higher and decreases near the partial pressure of 20% xenon as ion flux of neon decreases. The dependence due to the hot neon ions on partial pressure and applied voltage agrees well with experimental results, but the dependence due to the hot xenon ions deviates considerably. This result shows that the net sputtering rate is dominated by the hot neon ions. Maximum E h Ne (E h Ne,max = 5.3 - 10.3 eV) is lower than E th,Ne (19.5 eV) for the MgO layer; therefore, weak sputtering due to the hot neon ions takes place. One hot neon ion sputters each magnesium and each oxygen atom on the surface and distorts around a vacancy. The ratio of the maximum net sputtering rate is approximately determined by number of the ions at E h i,max multiplied by an exponential factor of -E th,i /E h i,max .

Effectiveness of projectile screening in single and multiple ionization of Ne by B{sup 2+}

Energy Technology Data Exchange (ETDEWEB)

Wolff, W.; Luna, H.; Santos, A. C. F.; Montenegro, E. C. [Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, 21945-970 RJ (Brazil); DuBois, R. D. [Department of Physics, Missouri University of Science and Technology, Rolla, Missouri 65409 (United States); Montanari, C. C.; Miraglia, J. E. [Instituto de Astronomia y Fisica del Espacio, Casilla de Correo 67, Sucursal 28, C1428EGA, Buenos Aires (Argentina)

2011-10-15

Pure multiple ionization cross sections of Ne by B{sup 2+} projectiles have been measured in the energy range of 0.75 to 4.0 MeV and calculated using the continuum distorted wave-eikonal initial state approximation. The experiment and calculations show that the ionization cross sections by B{sup 2+}, principally for the production of highly charged recoils, is strongly enhanced when compared to the bare projectile with the same charge state, He{sup 2+}, at the same velocities.

19 CFR 210.58 - Provisional acceptance of the motion.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Provisional acceptance of the motion. 210.58 Section 210.58 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.58 Provisional acceptance of...

19 CFR 212.12 - Documentation of fees and expenses.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Documentation of fees and expenses. 212.12 Section 212.12 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT Information Required From...

19 CFR 212.20 - Filing and service of documents.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Filing and service of documents. 212.20 Section 212.20 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT Procedures for Considering...

Half-life of the superallowed β+ emitter Ne18

Science.gov (United States)

Grinyer, G. F.; Smith, M. B.; Andreoiu, C.; Andreyev, A. N.; Ball, G. C.; Bricault, P.; Chakrawarthy, R. S.; Daoud, J. J.; Finlay, P.; Garrett, P. E.; Hackman, G.; Hyland, B.; Leslie, J. R.; Morton, A. C.; Pearson, C. J.; Phillips, A. A.; Schumaker, M. A.; Svensson, C. E.; Valiente-Dobón, J. J.; Williams, S. J.; Zganjar, E. F.

2007-08-01

The half-life of Ne18 has been determined by detecting 1042-keV γ rays in the daughter F18 following the superallowed-Fermi β+ decay of samples implanted at the center of the 8πγ-ray spectrometer, a spherical array of 20 HPGe detectors. Radioactive Ne18 beams were produced on-line, mass-separated, and ionized using an electron-cyclotron-resonance ionization source at the ISAC facility at TRIUMF in Vancouver, Canada. This is the first high-precision half-life measurement of a superallowed Fermi β decay to utilize both a large-scale HPGe spectrometer and the isotope separation on-line technique. The half-life of Ne18, 1.6656 ± 0.0019 s, deduced following a 1.4σ correction for detector pulse pile-up, is four times more precise than the previous world average. As part of an investigation into potential systematic effects, the half-life of the heavier isotope Ne23 was determined to be 37.11 ± 0.06 s, a factor of 2 improvement over the previous precision.

19 CFR 10.510 - Filing of claim for preferential tariff treatment upon importation.

Science.gov (United States)

2010-04-01

... RATE, ETC. United States-Singapore Free Trade Agreement Import Requirements § 10.510 Filing of claim... method specified for equivalent reporting via an authorized electronic data interchange system. For all... classified, or by the method specified for equivalent reporting via an authorized electronic data interchange...

International Trends in Health Science Librarianship Part 19: The Balkan States (Bulgaria and Croatia).

Science.gov (United States)

Kirilova, Savina; Skoric, Lea

2016-09-01

This is the 19th in a series of articles exploring international trends in health science librarianship in the 21st century. The focus of the present issue is the Balkan Region (Bulgaria and Croatia). The next regular feature column will investigate two other Balkan states - Serbia and Slovenia. JM. © 2016 Health Libraries Group.

A modified Wright-Fisher model that incorporates Ne: A variant of the standard model with increased biological realism and reduced computational complexity.

Science.gov (United States)

Zhao, Lei; Gossmann, Toni I; Waxman, David

2016-03-21

The Wright-Fisher model is an important model in evolutionary biology and population genetics. It has been applied in numerous analyses of finite populations with discrete generations. It is recognised that real populations can behave, in some key aspects, as though their size that is not the census size, N, but rather a smaller size, namely the effective population size, Ne. However, in the Wright-Fisher model, there is no distinction between the effective and census population sizes. Equivalently, we can say that in this model, Ne coincides with N. The Wright-Fisher model therefore lacks an important aspect of biological realism. Here, we present a method that allows Ne to be directly incorporated into the Wright-Fisher model. The modified model involves matrices whose size is determined by Ne. Thus apart from increased biological realism, the modified model also has reduced computational complexity, particularly so when Ne⪡N. For complex problems, it may be hard or impossible to numerically analyse the most commonly-used approximation of the Wright-Fisher model that incorporates Ne, namely the diffusion approximation. An alternative approach is simulation. However, the simulations need to be sufficiently detailed that they yield an effective size that is different to the census size. Simulations may also be time consuming and have attendant statistical errors. The method presented in this work may then be the only alternative to simulations, when Ne differs from N. We illustrate the straightforward application of the method to some problems involving allele fixation and the determination of the equilibrium site frequency spectrum. We then apply the method to the problem of fixation when three alleles are segregating in a population. This latter problem is significantly more complex than a two allele problem and since the diffusion equation cannot be numerically solved, the only other way Ne can be incorporated into the analysis is by simulation. We have

Experimental positions and lifetimes of Be-like 1s23lnl'(n=3 to 5) states of O4+ and Ne6+ ions investigated by high resolution electron spectroscopy: test of calculations

International Nuclear Information System (INIS)

Bordenave-Montesquieu, A.; Moretto-Capelle, P.; Bordenave-Montesquieu, D.

1999-01-01

Using high resolution electron spectroscopy, positions and lifetimes of many Be-like singlet states of the 1s 2 3lnl' Rydberg series (n = 3 to 5) of oxygen and neon have been measured for the first time. This was achieved by a fitting procedure which takes into account an accurate definition of the post-collisional electron lineshapes. These states are produced after a double electron capture by multicharged ions has occurred in O 6+ (1s 2 )+He, H 2 and Ne 8+ (1s 2 )+He collisions at about 4 keV/amu collision energy. (orig.)

Determination of excitation temperature and vibrational temperature of the N2(C 3Πu, ν') state in Ne-N2 RF discharges

International Nuclear Information System (INIS)

Rehman, N U; Naveed, M A; Zakaullah, M; Khan, F U

2008-01-01

Optical emission spectroscopy is used to investigate the effect of neon mixing on the excitation and vibrational temperatures of the second positive system in nitrogen plasma generated by a 13.56 MHz RF generator. The excitation temperature is determined from Ne I line intensities, using Boltzmann's plot. The overpopulation of the levels of the N 2 (C 3 Π u , ν') states with neon mixing are monitored by measuring the emission intensities of the second positive system of nitrogen molecules. The vibrational temperature is calculated for the sequence Δν = -2, with the assumption that it follows Boltzmann's distribution. But due to overpopulation of levels, e.g. 1, 4, a linearization process was employed for such distributions allowing us to calculate the vibrational temperature of the N 2 (C 3 Π u , ν') state. It is found that the excitation temperature as well as the vibrational temperature of the second positive system can be raised significantly by mixing neon with nitrogen plasma. It is also found that the vibrational temperature increases with power and pressure up to 0.5 mbar.

Plate Tectonic Cycling and Whole Mantle Convection Modulate Earth's 3He/22Ne Ratio

Science.gov (United States)

Dygert, N. J.; Jackson, C.; Hesse, M. A.; Tremblay, M. M.; Shuster, D. L.; Gu, J.

2016-12-01

3He and 22Ne are not produced in the mantle or fractionated by partial melting, and neither isotope is recycled back into the mantle by subduction of oceanic basalt or sediment. Thus, it is a surprise that large 3He/22Ne variations exist within the mantle and that the mantle has a net elevated 3He/22Ne ratio compared to volatile-rich planetary precursor materials. Depleted subcontinental lithospheric mantle and mid-ocean ridge basalt (MORB) mantle have distinctly higher 3He/22Ne compared to ocean island basalt (OIB) sources ( 4-12.5 vs. 2.5-4.5, respectively) [1,2]. The low 3He/22Ne of OIBs approaches chondritic ( 1) and solar nebula values ( 1.5). The high 3He/22Ne of the MORB mantle is not similar to solar sources or any known family of meteorites, requiring a mechanism for fractionating He from Ne in the mantle and suggesting isolation of distinct mantle reservoirs throughout geologic time. We model the formation of a MORB source with elevated and variable 3He/22Ne though diffusive exchange between dunite channel-hosted basaltic liquids and harzburgite wallrock beneath mid-ocean ridges. Over timescales relevant to mantle upwelling beneath spreading centers, He may diffuse tens to hundreds of meters into wallrock while Ne is relatively immobile, producing a regassed, depleted mantle lithosphere with elevated 3He/22Ne. Subduction of high 3He/22Ne mantle would generate a MORB source with high 3He/22Ne. Regassed, high 3He/22Ne mantle lithosphere has He concentrations 2-3 orders of magnitude lower than undegassed mantle. To preserve the large volumes of high 3He/22Ne mantle required by the MORB source, mixing between subducted and undegassed mantle reservoirs must have been limited throughout geologic time. Using the new 3He/22Ne constraints, we ran a model similar to [3] to quantify mantle mixing timescales, finding they are on the order of Gyr assuming physically reasonable seafloor spreading rates, and that Earth's convecting mantle has lost >99% of its primordial

New low pressure (LP) turbines for NE Krsko

International Nuclear Information System (INIS)

Nemcic, K.; Novsak, M.

2004-01-01

During the evaluation of possible future maintenance strategies on steam turbine in very short period of time, engineering decision was made by NE Krsko in agreement with Owners to replace the existing two Low Pressure (LP) Turbines with new upgrading LP Turbines. This decision is presented with review of the various steam turbine problems as: SCC on turbine discs; blades cracking; erosion-corrosion with comparison of various maintenance options and efforts undertaken by the NE Krsko to improve performance of the original low pressure turbines. This paper presents the NEK approach to solve the possible future problems with steam turbine operation in NE Krsko as pro-active engineering and maintenance activities on the steam turbine. This paper also presents improvements involving retrofits, confined to the main steam turbine path, with major differences between original and new LP Turbines as beneficial replacement because of turbine MWe upgrading and return capital expenditures.(author)

NE seeks to sell power directly to customers

International Nuclear Information System (INIS)

Anon.

1993-01-01

Nuclear Electric, the state-owned company that operates nuclear power stations in England and Wales, has applied to compete directly with privatized electricity generating companies in the sale of electricity to major customers. Since its formation in 1990, NE has had to sell all of its electrical output through the so-called pool operated by the National Grid Company, and then to 12 regional distribution companies that have franchises for about 75 percent of electricity consumption in their regions. On the other hand, the two large companies that took over the fossil-fuel power stations at the time of privatization, and other new independent companies that are building combined-cycle gas-turbine plants, are allowed to conclude supply contracts directly with large industrial customers

Potential energy surfaces for N = Z, 20Ne-112Ba nuclei

International Nuclear Information System (INIS)

Mehta, M.S.; Gupta, Raj K.; Jha, T.K.; Patra, S.K.

2004-01-01

We have calculated the potential energy surfaces for N = Z, 20 Ne- 112 Ba nuclei in an axially deformed relativistic mean field approach. A quadratic constraint scheme is applied to determine the complete energy surface for a wide range of the quadrupole deformation. The NL3, NL-RAl and TM1 parameter sets are used. The phenomenon of (multiple) shape coexistence is studied and the calculated ground and excited state binding energies, quadrupole deformation parameters and root mean square (rms) charge radii are compared with the available experimental data and other theoretical predictions. (author)

The nucleon axial mass and the MiniBooNE CCQE neutrino-nucleus data

International Nuclear Information System (INIS)

Nieves, J; Ruiz Simo, I; Vacas, M J Vicente

2013-01-01

We analyze the MiniBooNE CCQE dσ/dT μ d cos θ μ data using a theoretical model that has proved to be quite successful in the analysis of nuclear reactions with electron, photon and pion probes. We find that RPA and multinucleon knockout turn out to be essential for the description of the MiniBooNE data. We show these measurements are fully compatible with former determinations of nucleon axial mass M A , in contrast with several previous analyses, which have suggested an anomalously large value. We find, M A = 1.08 ± 0.03 GeV. We also argue that the procedure, commonly used to reconstruct the neutrino energy for QE events from the muon angle and energy, could be unreliable for a wide region of the phase space, due to the large importance of multinucleon events.

19 CFR 10.3 - Drawback; internal-revenue tax.

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2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Drawback; internal-revenue tax. 10.3 Section 10.3... and Returned § 10.3 Drawback; internal-revenue tax. (a) Except as prescribed in § 10.1(f) or in... tax is imposed on the importation of like articles not previously exported from the United States or...

Performance evaluation of working standard NE2581 in comparison with reference standard NE2561 in the determination of absorbed dose to water using IAEA, HPA, NACP, AAPM, NCRP and ICRU protocols

International Nuclear Information System (INIS)

Dolah, M.T.; Supian Samat; Taiman Kadni

2001-01-01

The aim of this study was to evaluate the performance of NE 2581 in comparison with NE 2561 in the determination of the absorbed dose to water in a γ-ray beam using IAEA, HPA, NACP, AAPM, NCRP and ICRU protocols. 13 exposures of the γ-ray beams were used. This number of exposures yielded 26 chamber rate readings for NE 2581 (N=13) and for NE 2561 (N=13). From the 13 NE 2581 readings, 78 absorbed dose to water values were calculated for the IAEA (N=13), HPA (N=13), NACP (N=13), AAPM (N=13), NCRP (N=13) and ICRU (N=13) protocols. Similarly, from the 13 NE 2561 readings, 78 absorbed dose to water values were calculated for IAEA (N=13), HPA (N=13), NACP (N=13), AAPM (N=13), NCRP (N=13) and ICRU (N=13) protocols. From these 156 (=78 x 2) absorbed dose to water values, 78 percentage deviations between the NE 2581 and NE 2561 results were calculated for IAEA (N=13), HPA (N=13), NACP (N=13), AAPM (N=13), NCRP (N=13) and ICRU (N=13) protocols. For a single protocol, the mean μ and standard error σ+s+e of the percentage deviations (N=13) were calculated. results obtained in terms of [protocol, μ ± σ se ] were [IAEA,1.55 ± 0.12], [HPA, 0.98 ± 0.12], [NACP, 1.93 ± 0.12], [AAPM, -0.06 ± 0.12], [NCRP, 0.97 ± 0.12], [ICRU, 0.97 ± 0.12]. It can be seen that the range of percentage deviations is from -0.06 to 1.93. As the quoted IAEA acceptable limit of deviation is ± 3.0%, it was concluded that the working standard NE 2581 chamber has shown acceptable performance. In addition, the use of the AAPM protocol has enable NE 2581 to show a performance that is very similar like NE 2561. (Author)

The unusual strength of the 5.14→1.27MeV, 2-→2+ transition in 22Ne

International Nuclear Information System (INIS)

Merdinger, J.C.; Bozek, E.; Gehringer, C.; Stachura, Z.

1975-01-01

The lifetime of the 5.14MeV excited state of 22 Ne was investigated by use of the electronic timing, recoil distance and Doppler shift attenuation techniques. A mean life tau=1.2+-0.3ps was obtained, corresponding to a transition strength of 9.8x10 -6 W.u. for the E1 decay of this state [fr

Seasonal Trace Gas Dynamics on Minerotrophic Fen Peatlands in NE-Germany

Science.gov (United States)

Giebels, Michael; Beyer, Madlen; Augustin, Jürgen; Minke, Merten; Juszczak, Radoszlav; Serba, Tomasz

2010-05-01

In Germany more than 99 % of fens have lost their carbon and nutrient sink function due to heavy drainage and agricultural land use especially during the last decades and thus resulted in compression and heavy peat loss (CHARMAN 2002; JOOSTEN & CLARKE 2002; SUCCOW & JOOSTEN 2001; AUGUSTIN et al. 1996; KUNTZE 1993). Therefore fen peatlands play an important part (4-5 %) in the national anthropogenic trace gas budget. But only a small part of drained and agricultural used fens in NE Germany can be restored. Knowledge of the influence of land use to trace gas exchange is important for mitigation of the climate impact of the anthropogenic peatland use. We study carbon exchanges of several fen peatland use areas between soil and atmosphere at different sites in NE-Germany. Our research covers peatlands of supposed strongly climate forcing land use (cornfield and intensive pasture) and of probably less forcing, alternative types (meadow and extensive pasture) as well as rewetted (formerly drained) areas and near-natural sites like a low-degraded fen and a wetted alder woodland. We measured trace gas fluxes with manual and automatic chambers in periodic routines since spring 2007. The used chamber technique bases on DROESLER (2005). In total we now do research at 22 sites situated in 5 different locations covering agricultural, varying states of rewetted and near-natural treatments. We present results of at least 2 years of measurements and show significant differences in their annual trace gas balances depending on the genesis of the observed sites and the seasonal dynamics. Crosswise comparison of different site treatments combined with the seasonal environmental observations give good hints for the identification of main flux driving parameters. That is that a reduced intensity in land use as a supposed mitigating treatment did not show the expected effect, though a normal meadow treatment surprisingly resulted in the lowest balances in both years. For implementing a

Seasonal Carbon Dynamics on Selected Fen Peatland Sites in NE-Germany

Science.gov (United States)

Giebels, Michael; Beyer, Madlen; Augustin, Jürgen; Minke, Merten; Juszczak, Radoszlav; Serba, Tomasz

2010-05-01

In Germany more than 99 % of fens have lost their carbon and nutrient sink function due to heavy drainage and agricultural land use especially during the last decades and thus resulted in compression and heavy peat loss (CHARMAN 2002; JOOSTEN & CLARKE 2002; SUCCOW & JOOSTEN 2001; AUGUSTIN et al. 1996; KUNTZE 1993). Therefore fen peatlands play an important part (4-5 %) in the national anthropogenic trace gas budget. But only a small part of drained and agricultural used fens in NE Germany can be restored. Knowledge of the influence of land use to trace gas exchange is important for mitigation of the climate impact of the anthropogenic peatland use. We study carbon exchanges of several fen peatland use areas between soil and atmosphere at different sites in NE-Germany. Our research covers peatlands of supposed strongly climate forcing land use (cornfield and intensive pasture) and of probably less forcing, alternative types (meadow and extensive pasture) as well as rewetted (formerly drained) areas and near-natural sites like a low-degraded fen and a wetted alder woodland. We measured trace gas fluxes with manual and automatic chambers in periodic routines since spring 2007. The used chamber technique bases on DROESLER (2005). In total we now do research at 22 sites situated in 5 different locations covering agricultural, varying states of rewetted and near-natural treatments. We present results of at least 2 years of measurements and show significant differences in their annual carbon balances depending on the genesis of the observed sites and the seasonal dynamics. Crosswise comparison of different site treatments combined with the seasonal environmental observations give good hints for the identification of main flux driving parameters. That is that a reduced intensity in land use as a supposed mitigating treatment did not show the expected effect, though a normal meadow treatment surprisingly resulted in the lowest CO2 balances in both years. For implementing a

Characterization of Final State Interaction Strength in Plastic Scintillator by Muon-Neutrino Charged Current Charged Pion Production

Energy Technology Data Exchange (ETDEWEB)

Eberly, Brandon M. [Univ. of Pittsburgh, PA (United States)

2014-01-01

Precise knowledge of neutrino-nucleus interactions is increasingly important as neutrino oscillation measurements transition into the systematics-limited era. In addition to modifying the initial interaction, the nuclear medium can scatter and absorb the interaction by-products through final state interactions, changing the types and kinematic distributions of particles seen by the detector. Recent neutrino pion production data from MiniBooNE is inconsistent with the final state interaction strength predicted by models and theoretical calculations, and some models fit best to the MiniBooNE data only after removing final state interactions entirely. This thesis presents a measurement of dσ/dT_π and dσ/dθ_π for muon-neutrino charged current charged pion production in the MINER A scintillator tracker. MINER A is a neutrino-nucleus scattering experiment installed in the few-GeV NuMI beam line at Fermilab. The analysis is limited to neutrino energies between 1.5-10 GeV. Dependence on invariant hadronic mass W is studied through two versions of the analysis that impose the limits W < 1.4 GeV and W < 1.8 GeV. The lower limit on W increases compatibility with the MiniBooNE pion data. The shapes of the differential cross sections, which depend strongly on the nature of final state interactions, are compared to Monte Carlo and theoretical predictions. It is shown that the measurements presented in this thesis favor models that contain final state interactions. Additionally, a variety of neutrino-nucleus interaction models are shown to successfully reproduce the thesis measurements, while simultaneously failing to describe the shape of the MiniBooNE data.

Agnostic stacking of intergalactic doublet absorption: measuring the Ne VIII population

Science.gov (United States)

Frank, Stephan; Pieri, Matthew M.; Mathur, Smita; Danforth, Charles W.; Shull, J. Michael

2018-05-01

We present a blind search for doublet intergalactic metal absorption with a method dubbed `agnostic stacking'. Using a forward-modelling framework, we combine this with direct detections in the literature to measure the overall metal population. We apply this novel approach to the search for Ne VIII absorption in a set of 26 high-quality COS spectra. We probe to an unprecedented low limit of log N>12.3 at 0.47≤z ≤1.34 over a path-length Δz = 7.36. This method selects apparent absorption without requiring knowledge of its source. Stacking this mixed population dilutes doublet features in composite spectra in a deterministic manner, allowing us to measure the proportion corresponding to Ne VIII absorption. We stack potential Ne VIII absorption in two regimes: absorption too weak to be significant in direct line studies (12.3 13.7). We do not detect Ne VIII absorption in either regime. Combining our measurements with direct detections, we find that the Ne VIII population is reproduced with a power-law column density distribution function with slope β = -1.86 ^{+0.18 }_{ -0.26} and normalization log f_{13.7} = -13.99 ^{+0.20 }_{ -0.23}, leading to an incidence rate of strong Ne VIII absorbers dn/dz =1.38 ^{+0.97 }_{ -0.82}. We infer a cosmic mass density for Ne VIII gas with 12.3 value significantly lower that than predicted by recent simulations. We translate this density into an estimate of the baryon density Ωb ≈ 1.8 × 10-3, constituting 4 per cent of the total baryonic mass.

Complete and incomplete fusion dynamics in 20Ne + 165Ho system

International Nuclear Information System (INIS)

Linda, Sneha Bharti; Giri, Pankaj K.; Singh, D.; Kumar, Harish; Afzal Ansari, M.; Ali, Rahbar; Rashid, M.H.; Guin, R.; Das, S.K.

2016-01-01

In the present work, an attempt has been made to address some of the important aspects of CF and ICF dynamics for the system 20 Ne + 165 Ho in the projectile energy range 4-8 MeV/nucleon by employing the recoil catcher technique followed by off-line γ-ray spectroscopy. The excitation functions (EFs) of the two ERs 171 Ta and 168 Hf have been measured. In the present measurement no precursor decay contributions has been measured

Precise determination of cosmogenic Ne in CREU-1 quartz standard, using the Helix-MC Plus mass spectrometer

Science.gov (United States)

Hamilton, D.; Honda, M.; Zhang, X.; Phillips, D.; Matchan, E.

2017-12-01

The Helix-MC Plus multi-collector noble gas mass spectrometer at the Australian National University is uniquely equipped with three high mass resolution collectors on H2, Axial and L2 positions. Their mass resolution and mass resolving power are as high as 1,800 and 8,000, respectively. The Helix-MC Plus can totally separate 20Ne+ from 40Ar++ isobaric interference and also partially separate 21Ne+ from 20NeH+ and 22Ne+ from 12C16O2++. By adjusting collector positions, we are able to measure interference-free Ne isotope intensities and have re-determined the 21Ne abundance in air [1]. Analyses by Honda et al. [1] demonstrated that 20Ne1H contributes approximately 2% to previously determined atmospheric 21Ne values [2], and a new atmospheric 21Ne/20Ne ratio of 0.002906 was calculated. Using the Helix-MC Plus mass spectrometer, we measured Ne abundances in the CREU-1 quartz standard [3] and determined cosmogenic concentrations by subtraction of atmospheric Ne with the new atmospheric 21Ne/20Ne value. The average concentration of cosmogenic 21Ne determined from four repeated analyses is 338 ± 12 × 106 atom/g (2σ). This compares with the average concentration of 348 ± 10 × 106 atom/g (2σ) from 45 analyses determined by several laboratories [3], where Ne isotope analyses were undertaken by conventional low resolution mass spectrometers and atmospheric Ne was subtracted using the conventional atmospheric 21Ne/20Ne [2]. On this basis, for a sample with abundant cosmogenic Ne, like CREU-1 quartz, previously measured by low mass resolution mass spectrometers are likely valid and their geological implications are unaffected. However, for low 21Ne concentration samples, combining new generation of mass spectrometers as well as the new atmospheric ratio may have significance for cosmogenic 21Ne surface exposure dating. References: [1] Honda M., et. al., International Journal of Mass Spectrometry, 387, 1 (2015). [2] Eberhardt P., et. al., Zeitschrift fur Naturforschung, 20

19 CFR 210.39 - In camera treatment of confidential information.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false In camera treatment of confidential information. 210.39 Section 210.39 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Prehearing Conferences and Hearings § 210...

19 CFR 210.40 - Proposed findings and conclusions and briefs.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Proposed findings and conclusions and briefs. 210.40 Section 210.40 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Prehearing Conferences and Hearings § 210...

19 CFR 11.1 - Cigars, cigarettes, medicinal preparations, and perfumery.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Cigars, cigarettes, medicinal preparations, and..., cigarettes, medicinal preparations, and perfumery. (a) All cigars and cigarettes imported into the United... domestic cigars, cigarettes, medicinal preparations, and perfumery, which are returned to the United States...

Investigation of 35S NE-78241 mobility in plants

International Nuclear Information System (INIS)

Enisz, J.; Orsos, S.

1982-01-01

The mobility of 35 S NE-78241 (N-iso-thiocyanato-methyl-2,6-dimethyl-chloracetanilide) in plants has been studied. The compound is not absorbed via the leaves from aqueous solutions. It shows active transport through the root-system. It is strongly bound to soil. In bean plant (Phaseolus vulgaris) inoculated with Uromyces appendiculatus 35 S NE-78241 is selectively enriched at the place of infection. (author)

Computation of Ion Charge State Distributions After Inner-shell Ionization in Ne, Ar and Kr Atoms Using Monte Carlo Simulation

International Nuclear Information System (INIS)

Ahmed Ghoneim, Adel Aly; Ghoneim, Adel A.; Al-Zanki, Jasem M.; El-Essawy, Ashraf H.

2009-01-01

Atomic reorganization starts by filling the initially inner-shell vacancy by a radiative transition (x-ray) or by a non-radiative transition (Auger and Coster-Kronig processes). New vacancies created during this atomic reorganization may in turn be filled by further radiative and non-radiative transitions until all vacancies reach the outermost occupied shells. The production of inner-shell vacancy in an atom and the de-excitation decays through radiative and non-radiative transitions may result in a change of the atomic potential; this change leads to the emission of an additional electron in the continuum (electron shake-off processes). In the present work, the ion charge state distributions (CSD) and mean atomic charge ions produced from inner shell vacancy de-excitation decay are calculated for neutral Ne , Ar and Kr atoms. The calculations are carried out using Monte Carlo (MC) technique to simulate the cascade development after primary vacancy production. The radiative and non-radiative transitions for each vacancy are calculated in the simulation. In addition, the change of transition energies and transition rates due to multi vacancies produced in the atomic configurations through the cascade development are considered in the present work. It is found that considering the electron shake off process and closing of non-allowed non-radiative channels improves the results of both charge state distributions (CSD) and average charge state. To check the validity of the present calculations, the results obtained are compared with available theoretical and experimental data. The present results are found to agree well with the available theoretical and experimental values. (author)

Summer mistral at the exit of the Rhône valley

Science.gov (United States)

Drobinski, P.; Bastin, S.; Guenard, V.; Caccia, J. L.; Dabas, A. M.; Delville, P.; Protat, A.; Reitebuch, O.; Werner, C.

2005-01-01

The paper examines the three-dimensional structure and dynamics of the mistral at the Rhône valley exit on 28 June 2001. The mistral refers to a severe wind that develops along the Rhône valley in southern France. This summer mistral event was documented in the framework of the ESCOMPTE field experiment. The dynamical processes driving the circulation of the mistral in the Rhône valley and particularly wake formation and planetary boundary layer (PBL) inhomogeneity at the scale of Rhône valley delta are investigated. Several important data sources are used (airborne Doppler lidar, radiosondes and surface stations) as well as non-hydrostatic mesoscale simulations. This paper analyses experimentally, numerically and theoretically the mechanism of wake formation. It shows that the flow impinging on the Alpine range and the Massif Central becomes supercritical all along the ridge line, including the Rhône valley and continues to accelerate in the lee regions until a hydraulic jump occurs. It leads to the formation of wakes behind and close to the mountain peaks. Compared to the Massif Central wake, the origin of the western Alps wake is rather complicated. In this study, the observations and simulations suggest a combined wall separation/gravity wave breaking mechanism to explain the western Alps wake. Indeed, it is shown that in addition to the flow descending the western Alps slopes and experiencing a strong hydraulic jump, the point where the mistral flow separates from the eastern flank of the Rhône valley located at about 44°N is associated with a 'flank-shock' which is an oblique hydraulic jump (i.e.the downstream Froude number is supercritical). Wake formation in the lee of the Alps and the Massif Central causes large inhomogeneity of the PBL with differences between land and sea. In the Massif Central and western Alps wakes, the continental PBL is deeper (1.8 km) than in the mistral flow (1 km), which is consistent with a subcritical regime associated

pH-Dependent spin state population and 19F NMR chemical shift via remote ligand protonation in an iron(ii) complex.

Science.gov (United States)

Gaudette, Alexandra I; Thorarinsdottir, Agnes E; Harris, T David

2017-11-30

An Fe II complex that features a pH-dependent spin state population, by virtue of a variable ligand protonation state, is described. This behavior leads to a highly pH-dependent 19 F NMR chemical shift with a sensitivity of 13.9(5) ppm per pH unit at 37 °C, thereby demonstrating the potential utility of the complex as a 19 F chemical shift-based pH sensor.

Neutron-Gamma Pulse Shape Discrimination With Ne-213 Liquid Scintillator By Using Digital Signal Processing Combined With Similarity Method

International Nuclear Information System (INIS)

Mardiyanto

2008-01-01

Neutron-Gamma Pulse Shape Discrimination with a NE-213 Liquid Scintillator by Using Digital Signal Processing Combined with Similarity Method. Measurement of mixed neutron-gamma radiation is difficult because a nuclear detector is usually sensitive to both radiations. A new attempt of neutron-gamma pulse shape discrimination for a NE-213 liquid scintillator is presented by using digital signal processing combined with an off-line similarity method. The output pulse shapes are digitized with a high speed digital oscilloscope. The n-γ discrimination is done by calculating the index of each pulse shape, which is determined by the similarity method, and then fusing it with its corresponding pulse height. Preliminary results demonstrate good separation of neutron and gamma-ray signals from a NE-213 scintillator with a simple digital system. The results were better than those with a conventional rise time method. Figure of Merit is used to determine the quality of discrimination. The figure of merit of the discrimination using digital signal processing combined with off-line similarity method are 1.9; 1.7; 1.1; 1.1; and 0.8; on the other hand by using conventional method the rise time are 0.9; 0.9; 0.9; 0.7; and 0.4 for the equivalent electron energy of 800; 278; 139; 69; and 30 keV. (author)

19 CFR 210.69 - Approval of complainant's temporary relief bond.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Approval of complainant's temporary relief bond. 210.69 Section 210.69 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.69 Approval of...

19 CFR 210.63 - Proposed findings and conclusions and briefs.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Proposed findings and conclusions and briefs. 210.63 Section 210.63 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.63 Proposed findings...

19 CFR 212.13 - When an application may be filed.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false When an application may be filed. 212.13 Section 212.13 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT Information Required From...

On importance assessment of aging multi-state system

Science.gov (United States)

Frenkel, Ilia; Khvatskin, Lev; Lisnianski, Anatoly

2017-01-01

Modern high-tech equipment requires precise temperature control and effective cooling below the ambient temperature. Greater cooling efficiencies will allow equipment to be operated for longer periods without overheating, providing a greater return on investment and increased in availability of the equipment. This paper presents application of the Lz-transform method to importance assessment of aging multi-state water-cooling system used in one of Israeli hospitals. The water cooling system consists of 3 principal sub-systems: chillers, heat exchanger and pumps. The performance of the system and the sub-systems is measured by their produced cooling capacity. Heat exchanger is an aging component. Straightforward Markov method applied to solve this problem will require building of a system model with numerous numbers of states and solving a corresponding system of multiple differential equations. Lz-transform method, which is used for calculation of the system elements importance, drastically simplified the solution. Numerical example is presented to illustrate the described approach.

Charge Exchange of Ne^9+ for X-ray Emission

Science.gov (United States)

Lyons, David

2016-01-01

Using the molecular-orbital close-coupling (MOCC) method, single electron capture (SEC) cross sections were computed for Ne^9+ colliding with H.Potential energies and nonadiabatic couplings were calculated and used to obtain the MOCC cross sections which are final-quantum-state-resolved including a separation of singlet and triplet states. Atomic-orbital close-coupling, classical trajectory Monte Carlo, and multichannel Landau-Zener (MCLZ) calculations are also performed. Cross sections for more complicated targets including He, H2, N2, H2O, CO, and CO2, were obtained with the MCLZ method. The SEC results are compared with experimental and other theoretical data, where available. The SEC cross sections are being used in cascade models to predict X-ray emission spectra relevant to solar systemand astrophysical environments.D. Lyons, R. S. Cumbee, P. D. Mullen, P. C. Stancil (UGA), D. R. Schultz (UNT), P. Liebermann (Wuppertal Univ.),R. Buenker (NCSU).This work was partially supported by NASA grant NNX09AC46G.

Lääne-Euroopa kaotab idale / Hans-Werner Sinn

Index Scriptorium Estoniae

Sinn, Hans-Werner, 1948-

2007-01-01

Ilmunud ka: Molodjozh Estonii 9. märts lk. 8. EL-i laienemine itta tähendab tööjõuturu jaoks seda, et nõudlus kõrgelt kvalifitseeritud Lääne-Euroopa tööjõu järele suureneb, kõigi teiste tööliste järele aga langeb ning kokkuvõttes töökohtade arv Lääne-Euroopas väheneb

19 CFR 12.107 - Importations permitted.

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2010-04-01

... TREASURY SPECIAL CLASSES OF MERCHANDISE Pre-Columbian Monumental and Architectural Sculpture and Murals § 12.107 Importations permitted. Pre-Columbian monumental or architectural sculpture or mural for which... sculpture or mural, in a form acceptable to the Secretary, certifying that such exportation was not in...

Experimental study of the {sup 22}Ne(p,{gamma}){sup 23}Na reaction and its implications for novae scenarios

Energy Technology Data Exchange (ETDEWEB)

Menzel, Marie-Luise

2013-08-01

The {sup 22}Ne(p,{gamma}){sup 23}Na reaction belongs to the catalytic neon-sodium cycle and has an important role in the explosive hydrogen burning. The neon-sodium cycle takes place at temperatures of T = 0.1 - 0.5 GK and is assumed to occur in different astrophysical systems: e.g. in novae, in super novae of type Ia and during the shell-burning of red giant branch stars. The implications of {sup 22}Ne(p,{gamma}){sup 23}Na and the neon-sodium cycle in a nova scenario have been studied by using the nuclear network code libnucnet at GSI in Darmstadt. A nova is an outburst of matter in a binary system consisting of a white dwarf and a red giant star. It is therefore a representative phenomenon for explosive hydrogen burning. For the calculation of the nucleosynthesis during the nova outburst, the code libnucnet requires the initial mass composition of the novae partners, the temperature and density profiles of the nova explosion and the thermonuclear reaction rates of the participating reactions. In the following, the code determined the flow and the final atomic abundance in the neon-sodium cycle during the entire nova process. Additionally, the influence of the temperature profile of the novae outburst as well as the thermonuclear reaction rate of the {sup 22}Ne(p,{gamma}){sup 23}Na reaction on the final atomic abundance in the outburst has been studied. A characteristic measure for the reactions in astrophysical environments is the thermonuclear reaction rate. The reaction rate of {sup 22}Ne(p,{gamma}){sup 23}Na has still strong uncertainties in the temperature range of T = 0.03 - 0.3 GK. These uncertainties are based on insufficient upper limits of the resonance strengths as well as the possible existence of tentative states that are populated in the energy range of E{sup lab}{sub p} = 30 - 300 keV. The research presented in this thesis is dedicated to the experimental study of the {sup 22}Ne(p,{gamma}){sup 23}Na reaction for an improved determination of the

Status of conversion of NE standards to national consensus standards

International Nuclear Information System (INIS)

Jennings, S.D.

1990-06-01

One major goal of the Nuclear Standards Program is to convert existing NE standards into national consensus standards (where possible). This means that an NE standard in the same subject area using the national consensus process. This report is a summary of the activities that have evolved to effect conversion of NE standards to national consensus standards, and the status of current conversion activities. In some cases, all requirements in an NE standard will not be incorporated into the published national consensus standard because these requirements may be considered too restrictive or too specific for broader application by the nuclear industry. If these requirements are considered necessary for nuclear reactor program applications, the program standard will be revised and issued as a supplement to the national consensus standard. The supplemental program standard will contain only those necessary requirements not reflected by the national consensus standard. Therefore, while complete conversion of program standards may not always be realized, the standards policy has been fully supported in attempting to make maximum use of the national consensus standard. 1 tab

50 CFR 19.2 - Scope of regulations.

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2010-10-01

... 50 Wildlife and Fisheries 6 2010-10-01 2010-10-01 false Scope of regulations. 19.2 Section 19.2... PLANTS (CONTINUED) AIRBORNE HUNTING Introduction § 19.2 Scope of regulations. The regulations contained... United States citizens whether within the territorial jurisdiction of the United States or on the high...

0 degree binary encounter electron production in 30-MeV Oq++H2, He, O2, Ne, and Ar collisions

International Nuclear Information System (INIS)

Zouros, T.J.; Wong, K.L.; Grabbe, S.; Hidmi, H.I.; Richard, P.; Montenegro, E.C.; Sanders, J.M.; Liao, C.; Hagmann, S.; Bhalla, C.P.

1996-01-01

Double-differential cross sections (DDCS close-quote s) for the production of binary encounter electrons (BEE close-quote s) were measured for collisions of 30-MeV O q+ projectiles with H 2 , He, O 2 , Ne, and Ar targets with q=4 endash 8 and an electron ejection angle of θ=0 degree with respect to the beam direction. Particular interest focused on (a) the evaluation of the contributions of the different electron subshells of the multielectron targets, O 2 , Ne, and Ar; (b) the study of the well-known enhancement of the BEE DDCS close-quote s with decreasing projectile charge-state q; here this dependence was tested for higher collision energies and new targets; (c) the study of the dependence of the BEE peak energy on the particular target and projectile charge state. Results were analyzed in terms of the impulse approximation, in which target electrons in the projectile frame undergo 180 degree elastic scattering in the field of the projectile ion. The electron scattering calculations were performed in a partial-wave treatment using the Hartree-Fock model. Good agreement with the data was found for the H 2 and He targets, while for the multielectron targets O 2 , Ne, and Ar only electrons whose velocity was lower than the projectile velocity needed to be included for good agreement. All measured BEE DDCS close-quote s were found to increase with decreasing projectile charge state, in agreement with other recent BEE results. The BEE peak energies were found to be independent of the projectile charge state for all targets utilized. copyright 1996 The American Physical Society

Transverse excitations of 19F

International Nuclear Information System (INIS)

Donne, A.J.H.

1985-01-01

In this thesis aspects of the structure of the nucleus 19 F are discussed as a result of transverse electron-scattering experiments, with emphasis on the ground state. The magnetization distribution of this state has been obtained from the measurement of electrons scattered from 19 F at backward angles. An introduction to the electron-scattering formalism is presented briefly together with the interpretation of electron-scattering results in terms of the nuclear shell model. The experimental apparatus for the measurement of electron scattering through an angle of 180 0 is described. This instrumentation has been installed in the low-energy facility (LEF) at NIKHEF-K. Simultaneously with the study of the magnetic ground state distribution of 19 F, also excited states of this nucleus up to an energy of 4.4 MeV have been investigated, mainly from data obtained in the EMIN station. Also for these states, the shell-model calculations have been the guide to determine their structure. (Auth.)

DIJAGNOSTIKA I LIJEČENJE INCIDENTALOMA NADBUBREŽNE ŽLIJEZDE: PREPORUKE REFERENTNOG CENTRA MINISTARSTVA ZDRAVSTVA ZA BOLESTI NADBUBREŽNE ŽLIJEZDE

OpenAIRE

KAŠTELAN, DARKO; DUŠEK, TINA; AGANOVIĆ, IZET; ŠTERN-PADOVAN, RANKA; KUZMANIĆ, DUŠKO; KAŠTELAN, ŽELJKO; KNEŽEVIĆ, NIKOLA; CRNČEVIĆ-ORLIĆ, ŽELJKA; KRALJEVIĆ, IVANA; DŽUBUR, FEĐA; PAVLIĆ-RENAR, IVANA; GILJEVIĆ, ZLATKO; JELČIĆ, JOZO; BARETIĆ, MAJA; ŠKORIĆ, TANJA

2010-01-01

Incidentalomi nadbubrežne žlijezde jesu tumori otkriveni tijekom dijagnostičke evaluacije nekoga drugog kliničkog stanja. Tehnološki napredak radioloških uređaja i njihova sve veća upotreba u svakodnevnoj kliničkoj praksi doveli su do češćeg otkrivanja ovih tumora čineći njihovu dijagnostiku i liječenje jednim od najvažnijih izazova moderne endokrinologije. Radi racionalnog pristupa ovim bolesnicima radna skupina koju su činili vodeći hrvatski stručnjaci iz područja bolesti nadbubrežne žlijez...

19 CFR 210.67 - Remedy, the public interest, and bonding.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Remedy, the public interest, and bonding. 210.67 Section 210.67 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.67 Remedy, the public interest...

19 CFR Appendix A to Part 210 - Adjudication and Enforcement

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Adjudication and Enforcement A Appendix A to Part 210 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Pt. 210, App. A Appendix A to Part 210—Adjudication and...

19 CFR 210.54 - Service of motion by the complainant.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Service of motion by the complainant. 210.54 Section 210.54 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.54 Service of motion by the...

32 CFR 705.19 - Financing.

Science.gov (United States)

2010-07-01

... 32 National Defense 5 2010-07-01 2010-07-01 false Financing. 705.19 Section 705.19 National Defense Department of Defense (Continued) DEPARTMENT OF THE NAVY UNITED STATES NAVY REGULATIONS AND OFFICIAL RECORDS PUBLIC AFFAIRS REGULATIONS § 705.19 Financing. (a) The financial requirements for...

Overview of the NARSTO-NE-OPS Program

International Nuclear Information System (INIS)

Philbrick, C. R.; Ryan, W. F.; Clark, R. D.; Doddridge, B. G; Dickerson, R. R.; Gaffney, J.; Marley, N.; Coulter, R.

2002-01-01

The NARSTO-NE-OPS (NorthEast Oxidant and Particle Study) is an investigation of the coupling of the meteorological and chemical processes that control the evolution of air pollution events. The project includes three major field programs carried out at a field site in northeast Philadelphia during the summers of 1998, 1999 and 2001. The activity brings together the research groups from 13 universities, 5 government laboratories and representatives of the electric power industry to apply the most advanced measurement techniques to understanding the physical and chemical processes contributing to air quality issues. Results have been obtained from three ground sites, two instrumented aircraft, many different instrumented balloon platforms, and several remote sensing techniques including satellites. In addition, the database used includes the ground-based measurements conducted at several surrounding state and city operated sites in Pennsylvania, New Jersey, Delaware, New York and Maryland. The results have shown the importance of developing the 3-dimensional regional scale picture of the atmosphere to understand and properly model air pollution events. It has been shown that only from such a perspective, which includes the vertical distribution and a regional context, can one hope to properly model and predict ozone and particulate pollution. A combination of photochemical and dynamical processes transport, both horizontal and vertical, accumulate pollutants that then mix with the locally produced chemical species to cause the more severe episodes of air pollution. Efforts have also focused on developmental testing of several new approaches to improved measuring techniques for better understanding of the physical and chemical properties of the airborne particulate matter

Ionization Electron Signal Processing in Single Phase LArTPCs II. Data/Simulation Comparison and Performance in MicroBooNE

Energy Technology Data Exchange (ETDEWEB)

Adams, C.; et al.

2018-04-07

The single-phase liquid argon time projection chamber (LArTPC) provides a large amount of detailed information in the form of fine-grained drifted ionization charge from particle traces. To fully utilize this information, the deposited charge must be accurately extracted from the raw digitized waveforms via a robust signal processing chain. Enabled by the ultra-low noise levels associated with cryogenic electronics in the MicroBooNE detector, the precise extraction of ionization charge from the induction wire planes in a single-phase LArTPC is qualitatively demonstrated on MicroBooNE data with event display images, and quantitatively demonstrated via waveform-level and track-level metrics. Improved performance of induction plane calorimetry is demonstrated through the agreement of extracted ionization charge measurements across different wire planes for various event topologies. In addition to the comprehensive waveform-level comparison of data and simulation, a calibration of the cryogenic electronics response is presented and solutions to various MicroBooNE-specific TPC issues are discussed. This work presents an important improvement in LArTPC signal processing, the foundation of reconstruction and therefore physics analyses in MicroBooNE.

Les clusters moléculaires. Applications en catalyse homogène et hétérogène Molecular Clusters. Applications in Homogeneous and Heterogeneous Catalysis

Directory of Open Access Journals (Sweden)

Dorbon M.

2006-11-01

Full Text Available Le présent article ne prétend pas être une étude bibliographique complète. II ne s'agit que d'une synthèse dont le but est l'introduction à un secteur de la chimie encore jeune et surtout très vaste et plein d'avenir. Les clusters métalliques sont des composés constitués d'atomes métalliques liés entre eux et généralement entourés de ligands ; ils présentent à la fois certaines des caractéristiques des complexes uninucléaires d'une part et des métaux massiques d'autre part. D'un point de vue fondamental, la chimie des clusters représente un domaine encore neuf et particulièrement vaste. D'un point de vue pratique, leur principal intérêt réside dans le fait que bon nombre d'entre eux ont fait preuve de propriétés catalytiques remarquables tant en mode homogène qu'en mode hétérogène. Ils doivent être pris en considération par les industriels de la chimie car certains peuvent être impliqués dans des réactions aussi importantes que la synthèse de Fischer-Tropsch, l'hydrogénation des oléfines, la réaction de gaz à l'eau et la fixation biologique de l'azote atmosphérique. This article does not pretend to be an exhaustive bibliographic survey. It is merely a synthesis intended as an introduction to a sector of chemistry which is still young and especially is very vast and promising. Metal clusters are compounds made up of metal atours bonded together and generally surrounded by ligands. They have various characteristics of both mono-nuclear complexes and bulk metals. From a fundamental point of view, the chemistry of clusters is still a new and particularly vast field. From a practical point of view, the importance of clusters lies in the fact that a good number of them have shown proof of remarkable catalytic properties, both homogeneous and heterogeneous. They must henceforth be taken into consideration by chemical engineers because some of them may be involved in such important reactions as the Fischer

19 CFR 210.9 - Action of Commission upon receipt of complaint.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Action of Commission upon receipt of complaint. 210.9 Section 210.9 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Commencement of Preinstitution Proceedings...

19 CFR 210.78 - Notice of enforcement action to Government agencies.

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2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Notice of enforcement action to Government agencies. 210.78 Section 210.78 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Enforcement Procedures and Advisory...

Exploration potential of Paraiba and Natal platform basins, NE Brazil; Potencial exploratorio das bacias da Paraiba e da plataforma de Natal, NE do Brazil

Energy Technology Data Exchange (ETDEWEB)

Barbosa, Jose A. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Lima Filho, Mario; Neumann, Virginio H. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Geologia; Maranhao Neto, Jose Carneiro; Araujo, Joao A.A. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Programa de Pos Graduacao em Geociencias

2008-07-01

The portion of Brazilian continental margin located between the Pernambuco Shear Zone (ZCPE) and Touros High, enclosing Natal Platform and Paraiba basin, NE Brazil, presents a thin sedimentary cover represented by Neo- Cretaceous deposits, over an elevated basement. In this zone the narrow platform ends abruptly against the ocean plate, forming a scarped slope. This area corresponds to the Transverse zone of Northeast Brazil (TZN) limited by two extensive transcurrent E-W shear zones that acted as accommodation zones for the strain produced by the advance of the southern and northern rift branches. During the Aptian, the rift suffered a NE deflection and contoured the Borborema Province and the TZN. The resistance of this block to the rift advance generated a prominent and elevated region into the Atlantic gulf which resulted in the absence of rift deposition over the Brazilian margin and its deviation to the African side. The model suggested by this paper denominates this area as the 'exception zone' of the Brazilian margin, which possess a poor petroliferous potential and need to be separated from the sector corresponding to the Pernambuco basin, located to south of ZCPE, representing the last piece of margin before the rift deflection and possessing an important petroliferous potential. (author)

Gamma-ray response of NE-213 measured between 2 and 11.5 MeV

International Nuclear Information System (INIS)

Ingersoll, D.T.; Wehring, B.W.; Starr, R.D.

1976-01-01

Because of the capability to discriminate between neutrons and gamma rays, NE-213 scintillators are useful as both fast-neutron and gamma-ray spectrometers. However, measured NE-213 Compton-recoil spectra require unfolding to yield gamma-ray energy spectra which entails a detailed knowledge of the gamma-ray response of the NE-213 detector system. Absolute measurements of the gamma-ray response of an NE-213 scintillator in the energy range of 2 to 11.5 MeV were made. The measurements were made using the University of Illinois superconducting electron microtron equipped with a gamma-ray monochromator. The response measurements will be used to construct a gamma-ray response matrix for NE-213 to be used with the FORIST unfolding code

Experimental Ion Mobility measurements in Ne-CO$_2$ and CO$_2$-N$_2$ mixtures

CERN Document Server

Encarnação, P.M.C.C.; Veenhof, R.; Neves, P.N.B.; Santos, F.P.; Trindade, A.M.F.; Borges, F.I.G.M.; Conde, C.A.N.

2016-01-01

In this paper we present the experimental results for the mobility, K0, of ions in neon-carbon dioxide (Ne-CO2) and carbon dioxide-nitrogen (CO2-N2) gaseous mixtures for total pressures ranging from 8–12 Torr, reduced electric fields in the 10–25 Td range, at room temperature. Regarding the Ne-CO2 mixture only one peak was observed for CO2 concentrations above 25%, which has been identified as an ion originated in CO2, while below 25% of CO2 a second-small peak appears at the left side of the main peak, which has been attributed to impurities. The mobility values for the main peak range between 3.51 ± 0.05 and 1.07 ± 0.01 cm2V−1s−1 in the 10%-99% interval of CO2, and from 4.61 ± 0.19 to 3.00 ± 0.09 cm2V−1s−1 for the second peak observed (10%–25% of CO2). For the CO2-N2, the time-of-arrival spectra displayed only one peak for CO2 concentrations above 10%, which was attributed to ions originated in CO2, namely CO2+(CO2), with a second peak appearing for CO2 concentrations below 10%. This secon...

10 CFR 440.19 - Labor.

Science.gov (United States)

2010-01-01

... 10 Energy 3 2010-01-01 2010-01-01 false Labor. 440.19 Section 440.19 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION WEATHERIZATION ASSISTANCE FOR LOW-INCOME PERSONS § 440.19 Labor. Payments for labor... supplement wages paid to training participants, public service employment workers, or other Federal or State...

A crossed-beam experiment on intramultiplet mixing collisions with short-lived Ne** {(2p)5(3p)} atoms

NARCIS (Netherlands)

Manders, M.P.I.; Ruyten, W.M.J.; van de Beucken, F..J.H.M.; Driessen, J.P.J.; Veugelers, W.J.T.; Kramer, P.H.; Vredenbregt, E.J.D.; van Hoek, W.B.M.; Sandker, G.J.; Beijerinck, H.C.W.; Verhaar, B.J.

1988-01-01

We describe the design, operation, and calibration of a crossed-beam experiment for the study of intramultiplet mixing collisions of short-lived electronically excited Ne{(2p)5(3p)}≡{α} atoms with ground-state atoms/molecules. The excellent performance of almost 1 kHz/Å2 (number of counts per unit

Charge Exchange of Highly Charged Ne and Mg Ions with H and He

Science.gov (United States)

Lyons, D.; Cumbee, R. S.; Stancil, P. C.

2017-10-01

Cross sections for single electron capture (SEC), or charge exchange (CX), in collisions of Ne(8-10)+ and Mg(8-12)+ with H and He, are computed using an approximate multichannel Landau-Zener (MCLZ) formalism. Final-state-resolved cross sections for the principal (n), orbital angular momentum (ℓ), and where appropriate, total spin angular momentum (S) quantum numbers are explicitly computed, except for the incident bare ions Ne10+ and Mg12+. In the latter two cases, n{\\ell }-resolution is obtained from analytical ℓ-distribution functions applied to n-resolved MCLZ cross sections. In all cases, the cross sections are computed over the collision energy range 1 meV/u to 50 keV/u with LZ parameters estimated from atomic energies obtained from experiment, theory, or, in the case of high-lying Rydberg levels, estimated with a quantum defect approach. Errors in the energy differences in the adiabatic potentials at the avoided crossing distances give the largest contribution to the uncertainties in the cross sections, which are expected to increase with decreasing cross section magnitude. The energy differences are deduced here with the Olson-Salop-Tauljberg radial coupling model. Proper selection of an ℓ-distribution function for bare ion collisions introduces another level of uncertainty into the results. Comparison is made to existing experimental or theoretical results when available, but such data are absent for most considered collision systems. The n{\\ell }S-resolved SEC cross sections are used in an optically thin cascade simulation to predict X-ray spectra and line ratios that will aid in modeling the X-ray emission in environments where CX is an important mechanism. Details on a MCLZ computational package, Stueckelberg, are also provided.

77 FR 29871 - Establishment of Class E Airspace; Red Cloud, NE

Science.gov (United States)

2012-05-21

...-0426; Airspace Docket No. 11-ACE-7] Establishment of Class E Airspace; Red Cloud, NE AGENCY: Federal... at Red Cloud, NE. Controlled airspace is necessary to accommodate new Area Navigation (RNAV) Standard Instrument Approach Procedures at Red Cloud Municipal Airport. The FAA is taking this action to enhance the...

LabVIEW Data Acquisition for NE213 Neutron Detector

International Nuclear Information System (INIS)

Gangadharan, Dhevan

2003-01-01

A neutron spectroscopy system based on a NE213 liquid scintillation detector at the Stanford Linear Accelerator Center measures neutron energies from a few MeV up to 800 MeV. The neutrons are produced from the electron beam and target interactions. The NE 213 scintillator, coupled with a Photomultiplier Tube (PMT), detects and converts radiation into electric pulses for signal processing. Signals are processed through Nuclear Instrument Modules (NIM) and Computer Automated Measurement and Control (CAMAC) modules. The processed pulses are then fed into a CAMAC analog to digital converter module (ADC). The ADC classifies the incoming analog pulses into one of 2048 digital channels. Data acquisition (DAQ) software based on LabVIEW version 7.0 acquires and organizes data from the CAMAC ADC. The DAQ system presents a spectrum showing a relationship between pulse events and respective charge (digital channel number). Various photon sources, such as Co-60, Y-88, and AmBe-241, are used to calibrate the NE213 detector. For each source, a Compton edge and reference energy in MeVee is obtained, resulting in a calibration curve. This project is focused on the development of a DAQ system and control setup to collect and process information from a NE213 liquid scintillation detector. A manual is also created to document the process of the development and interpretation of the LabVIEW-based DAQ system

Occurrence and biogeographic aspects of Melipona quinquefasciata in NE Brazil (Hymenoptera, Apidae

Directory of Open Access Journals (Sweden)

LIMA-VERDE L. W.

2002-01-01

Full Text Available The stingless bee Melipona quinquefasciata is not included among the nine bee species of Melipona described in literature of NE Brazil. However, reports of some farmers raised suspicion on the occurrence of M. quinquefasciata in the state of Ceará, in NE Brazil. Investigations were carried out from July 1997 to September 2000, by means of trips to the areas of probable occurrence of this bee species. Results confirmed the presence of M. quinquefasciata in Ceará and determined its habitat along the chapada do Araripe (Araripe plateau and all extension of planalto da Ibiapaba (Ibiapaba plateau, in altitudes between 600 and 900 m. Melipona quinquefasciata lives in the phytocoenosis of cerrado (Brazilian savanna, cerradão (savanna forest and carrasco (montane deciduous shrub vegetation on the top of Araripe plateau, and only carrasco in the Ibiapaba plateau. Due to pressures caused by reduction of the area covered with native vegetation, large use of agrochemicals in anthropic areas and generalised predatory hunting of honey and beeswax, M. quinquefasciata is in risk of disappearing from the ecosystems of Araripe and Ibiapaba plateaus within a few years.

Occurrence and biogeographic aspects of Melipona quinquefasciata in NE Brazil (Hymenoptera, Apidae

Directory of Open Access Journals (Sweden)

L. W. LIMA-VERDE

Full Text Available The stingless bee Melipona quinquefasciata is not included among the nine bee species of Melipona described in literature of NE Brazil. However, reports of some farmers raised suspicion on the occurrence of M. quinquefasciata in the state of Ceará, in NE Brazil. Investigations were carried out from July 1997 to September 2000, by means of trips to the areas of probable occurrence of this bee species. Results confirmed the presence of M. quinquefasciata in Ceará and determined its habitat along the chapada do Araripe (Araripe plateau and all extension of planalto da Ibiapaba (Ibiapaba plateau, in altitudes between 600 and 900 m. Melipona quinquefasciata lives in the phytocoenosis of cerrado (Brazilian savanna, cerradão (savanna forest and carrasco (montane deciduous shrub vegetation on the top of Araripe plateau, and only carrasco in the Ibiapaba plateau. Due to pressures caused by reduction of the area covered with native vegetation, large use of agrochemicals in anthropic areas and generalised predatory hunting of honey and beeswax, M. quinquefasciata is in risk of disappearing from the ecosystems of Araripe and Ibiapaba plateaus within a few years.

Acoustic calibration for the KM3NeT pre-production module

Energy Technology Data Exchange (ETDEWEB)

Enzenhöfer, A., E-mail: alexander.enzenhoefer@physik.uni-erlangen.de [Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D-91058 Erlangen (Germany)

2013-10-11

The proposed large scale Cherenkov neutrino telescope KM3NeT will carry photo-sensors on flexible structures, the detection units. The Mediterranean Sea, where KM3NeT will be installed, constitutes a highly dynamic environment in which the detection units are constantly in motion. Thus it is necessary to monitor the exact sensor positions continuously to achieve the desired resolution for the neutrino telescope. A common way to perform this monitoring is the use of acoustic positioning systems with emitters and receivers based on the piezoelectric effect. The acoustic receivers are attached to detection units whereas the emitters are located at known positions on the sea floor. There are complete commercial systems for this application with sufficient precision. But these systems are limited in the use of their data and inefficient as they were designed to perform only this single task. Several working groups in the KM3NeT consortium are cooperating to custom-design a positioning system for the specific requirements of KM3NeT. Most of the studied solutions hold the possibility to extend the application area from positioning to additional tasks like acoustic particle detection or monitoring of the deep-sea acoustic environment. The KM3NeT Pre-Production Module (PPM) is a test system to verify the correct operation and interoperability of the major involved hardware and software components developed for KM3NeT. In the context of the PPM, alternative designs of acoustic sensors including small piezoelectric elements equipped with preamplifiers inside the same housing as the optical sensors will be tested. These will be described in this article.

19 CFR 212.07 - Rulemaking on maximum rates for attorney fees.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Rulemaking on maximum rates for attorney fees. 212.07 Section 212.07 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT General Provisions...

Underwater acoustic positioning system for the SMO and KM3NeT - Italia projects

Energy Technology Data Exchange (ETDEWEB)

Viola, S.; Barbagallo, G.; Cacopardo, G.; Calí, C.; Cocimano, R.; Coniglione, R.; Costa, M.; Cuttone, G.; D' Amato, C.; D' Amato, V.; D' Amico, A.; De Luca, V.; Del Tevere, F.; Distefano, C.; Ferrera, F.; Gmerk, A.; Grasso, R.; Imbesi, M.; Larosa, G.; Lattuada, D. [INFN - Laboratori Nazionali del Sud, via Santa Sofia 62, 95125 Catania (Italy); and others

2014-11-18

In the underwater neutrino telescopes, the positions of the Cherenkov light sensors and their movements must be known with an accuracy of few tens of centimetres. In this work, the activities of the SMO and KM3NeT-Italia teams for the development of an acoustic positioning system for KM3NeT-Italia project are presented. The KM3NeT-Italia project foresees the construction, within two years, of 8 towers in the view of the several km{sup 3}-scale neutrino telescope KM3NeT.

Underwater acoustic positioning system for the SMO and KM3NeT - Italia projects

International Nuclear Information System (INIS)

Viola, S.; Barbagallo, G.; Cacopardo, G.; Calí, C.; Cocimano, R.; Coniglione, R.; Costa, M.; Cuttone, G.; D'Amato, C.; D'Amato, V.; D'Amico, A.; De Luca, V.; Del Tevere, F.; Distefano, C.; Ferrera, F.; Gmerk, A.; Grasso, R.; Imbesi, M.; Larosa, G.; Lattuada, D.

2014-01-01

In the underwater neutrino telescopes, the positions of the Cherenkov light sensors and their movements must be known with an accuracy of few tens of centimetres. In this work, the activities of the SMO and KM3NeT-Italia teams for the development of an acoustic positioning system for KM3NeT-Italia project are presented. The KM3NeT-Italia project foresees the construction, within two years, of 8 towers in the view of the several km 3 -scale neutrino telescope KM3NeT

Spectroscopy of lithium atoms sublimated from isolation matrix of solid Ne.

Science.gov (United States)

Sacramento, R L; Scudeller, L A; Lambo, R; Crivelli, P; Cesar, C L

2011-10-07

We have studied, via laser absorption spectroscopy, the velocity distribution of (7)Li atoms released from a solid neon matrix at cryogenic temperatures. The Li atoms are implanted into the Ne matrix by laser ablation of a solid Li precursor. A heat pulse is then applied to the sapphire substrate sublimating the matrix together with the isolated atoms at around 12 K. We find interesting differences in the velocity distribution of the released Li atoms from the model developed for our previous experiment with Cr [R. Lambo, C. C. Rodegheri, D. M. Silveira, and C. L. Cesar, Phys. Rev. A 76, 061401(R) (2007)]. This may be due to the sublimation regime, which is at much lower flux for the Li experiment than for the Cr experiment, as well as to the different collisional cross sections between those species to the Ne gas. We find a drift velocity compatible with Li being thermally sublimated at 11-13 K, while the velocity dispersion around this drift velocity is low, around 5-7 K. With a slow sublimation of the matrix we can determine the penetration depth of the laser ablated Li atoms into the Ne matrix, an important information that is not usually available in most matrix isolation spectroscopy setups. The present results with Li, together with the previous results with Cr suggest this to be a general technique for obtaining cryogenic atoms, for spectroscopic studies, as well as for trap loading. The release of the isolated atoms is also a useful tool to study and confirm details of the matrix isolated atoms which are masked or poorly understood in the solid. © 2011 American Institute of Physics

He-Ne laser protection barrier by means of poly (Tetrafluoroethylene-Perfluoro vinyl Ether) grafted by acrylic acid complexed with Cu(II)

International Nuclear Information System (INIS)

El-Ahdal, M.A.; Fayek, S.A.; El-Sawy, N.M.

2006-01-01

Appropriate eye and skin protection is a prerequisite for the safe operation of He-Ne laser in industrial and laboratory environments. In the present paper, measurement of the optical parameters of poly (tetrafluoroethylene-perfluorovinyl ether) grafted by acrylic acid and complexed with Cu(II) are reported. He-Ne laser beam radiation on wavelength of 632.8 nm and power 12.5mW was used. Transmittance and reflectance spectra and refractive index dispersion are presented. The study showed that the material has a protective level 4. Environmental conditions like thermal and fading processes were tested. This suggested that the material preserves its protective features as a protective eye and skin barriers of protective level 4. This was applied for occupational working time up to 8 h, temperature up to 50 degree C and for a time equal 74 days after laser irradiation. Radiation protection from laser sources has attracted a great deal of attention for long time because of their importance for human body. Intensive progress in lasers, optical communications, and data storage has challenged scientists to achieve perfection in optical components. These challenges have resulted in an active development of a wide variety of unconventional optical elements (Hariharan, 1996 and Efimov et al., 2002). Alexandrite solid state lasers with a wavelength of about 755 nm are frequently used in the field of medicine (Schirmarcher and Sutter, 2001). For removing tattoos, the Q-switched versions with impulse widths of several ten nanoseconds are an ideal instrument to keep the thermal stress of the patient's skin at low level. He-Ne laser is one of the most commonly used visible light lasers

Confinement and electron correlation effects in photoionization of atoms in endohedral anions: Ne-Cz-60

International Nuclear Information System (INIS)

Dolmatov, V K; Craven, G T; Keating, D

2010-01-01

Trends in resonances, termed confinement resonances, in photoionization of atoms A in endohedral fullerene anions A-C z- 60 are theoretically studied and exemplified by the photoionization of Ne in Ne-C z- 60 . Remarkably, above a particular nl ionization threshold of Ne in neutral Ne-C 60 (I z=0 nl ), confinement resonances in corresponding partial photoionization cross sections σ nl of Ne in any charged Ne-C z- 60 are not affected by a variation in the charge z of the carbon cage, as a general phenomenon. At lower photon energies, ω z=0 nl , the corresponding photoionization cross sections of charged Ne-C z- 60 (i.e., those with z ≠ 0) develop additional, strong, z-dependent resonances, termed Coulomb confinement resonances, as a general occurrence. Furthermore, near the innermost 1s ionization threshold, the 2p photoionization cross section σ 2p of the outermost 2p subshell of thus confined Ne is found to inherit the confinement resonance structure of the 1s photoionization spectrum, via interchannel coupling. As a result, new confinement resonances emerge in the 2p photoionization cross section of the confined Ne atom at photoelectron energies which exceed the 2p threshold by about a thousand eV, i.e., far above where conventional wisdom said they would exist. Thus, the general possibility for confinement resonances to resurrect in photoionization spectra of encapsulated atoms far above thresholds is revealed, as an interesting novel general phenomenon.

Digital optical modules for the KM3NeT neutrino telescope

Energy Technology Data Exchange (ETDEWEB)

Kalekin, Oleg [Universitaet Erlangen, ECAP (Germany); Collaboration: ANTARES-KM3NeT-Erlangen-Collaboration

2015-07-01

KM3NeT is multi-cubic-kilometer neutrino telescope under construction in the Mediterranean Sea. In the currently running Phase 1 of the project, almost 30 detection units - 700 m tall vertical structures holding 18 Digital Optical Modules (DOMs) each - will be produced and deployed. A KM3NeT DOM consists of a pressure resistant glass sphere encapsulating 31 photomultiplier tubes of 80 mm diameter, readout electronics and additional instrumentation for calibration and monitoring. The Erlangen Centre for Astroparticle Physics is one of the DOM integration sites of the project. This contribution describes the design, functionality and integration procedure of the KM3NeT DOM.

Ne bis in idem põhimõte Euroopa Liidu õiguses / Uno Lõhmus

Index Scriptorium Estoniae

Lõhmus, Uno, 1952-

2009-01-01

Ne bis in idem põhimõtte ehk teistkordse kohtumõistmise ja karistamise keelu territoriaalsest kohaldamisest. Schengeni rakenduskonventsiooni artiklis 54 sisalduva ne bis in idem põhimõtte tõlgendustest. Mõistetest "sama tegu" ja "lõplik kohtuotsus"

Zonal NePhRO scoring system: a superior renal tumor complexity classification model.

Science.gov (United States)

Hakky, Tariq S; Baumgarten, Adam S; Allen, Bryan; Lin, Hui-Yi; Ercole, Cesar E; Sexton, Wade J; Spiess, Philippe E

2014-02-01

Since the advent of the first standardized renal tumor complexity system, many subsequent scoring systems have been introduced, many of which are complicated and can make it difficult to accurately measure data end points. In light of these limitations, we introduce the new zonal NePhRO scoring system. The zonal NePhRO score is based on 4 anatomical components that are assigned a score of 1, 2, or 3, and their sum is used to classify renal tumors. The zonal NePhRO scoring system is made up of the (Ne)arness to collecting system, (Ph)ysical location of the tumor in the kidney, (R)adius of the tumor, and (O)rganization of the tumor. In this retrospective study, we evaluated patients exhibiting clinical stage T1a or T1b who underwent open partial nephrectomy performed by 2 genitourinary surgeons. Each renal unit was assigned both a zonal NePhRO score and a RENAL (radius, exophytic/endophytic properties, nearness of tumor to the collecting system or sinus in millimeters, anterior/posterior, location relative to polar lines) score, and a blinded reviewer used the same preoperative imaging study to obtain both scores. Additional data points gathered included age, clamp time, complication rate, urine leak rate, intraoperative blood loss, and pathologic tumor size. One hundred sixty-six patients underwent open partial nephrectomy. There were 37 perioperative complications quantitated using the validated Clavien-Dindo system; their occurrence was predicted by the NePhRO score on both univariate and multivariate analyses (P = .0008). Clinical stage, intraoperative blood loss, and tumor diameter were all correlated with the zonal NePhRO score on univariate analysis only. The zonal NePhRO scoring system is a simpler tool that accurately predicts the surgical complexity of a renal lesion. Copyright © 2014 Elsevier Inc. All rights reserved.

An overview of the NeT international round-robin programme: weld residual stress measurement and modelling in nuclear materials

International Nuclear Information System (INIS)

Reid, M.H.; Hamelin, C.J.

2016-01-01

This talk provides an overview of the European Network on Neutron Techniques Standardisation for Structural Integrity (NeT). The network involves some 35 organisations from industry and academia, whose goal is to identify best practice in the application of modern experimental and numerical techniques to problems related to the structural integrity of components, mainly relevant to nuclear applications. While the programme was originally built around neutron scattering techniques for residual stress measurement, it has grown considerably to include studies of X-ray diffraction, deep-hole drilling, the contour method and other measurement techniques. Significant efforts have also been made within NeT to understand and predict weld residual stresses, often employing commercially available finite element (FE) codes. Several Task Groups have been developed to address unique challenges found in nuclear applications, from stress development in multi-pass AISI 316LN austenitic steel welds to the effects of solid-state phase transformation on residual stress development in SA508 ferritic steel, which is often used for reactor pressure vessel (RPV) construction. Some current and future work performed under the auspices of NeT are provided, with a focus on work Conducted at ANSTO. The aim is to give the audience a comprehensive overview of the work undertaken in NeT, and to shed some light on the potential present in this kind of collaborative effort. (author)

Report: Fourth International Conference on Gas Hydrates, held at Yokohama, Japan, 19-23 May 2002

Digital Repository Service at National Institute of Oceanography (India)

Karisiddaiah, S.M.

formations, while Dr. L. Stern presented ne insights into the phenomena of anomalous or self- preservation of gas hydrates. JOUR.GEOL.SOC.INDIA, VOL.61, JAN. 2001 Posters on hydrate formation and prevention in pipelines and hydrate based...-1 REPORT ON THE 4TH INTERNATIONAL CONFERENCE ON GAS HYDRATES The fourth International Conference on Gas Hydrates was recently held at Yokohama, Japan, between 19-23 May 2002 following the earlier conferences held in USA (1993...

Quasi-free knockout reactions with the proton-dripline nucleus {sup 17}Ne

Energy Technology Data Exchange (ETDEWEB)

Wamers, Felix; Aumann, Thomas [Institut fuer Kernphysik, TU, Darmstadt (Germany); Heil, Michael [Kernreaktionen und Nukleare Astrophysik, GSI, Darmstadt (Germany); Marganiec, Justyna [ExtreMe Matter Institute EMMI, GSI, Darmstadt (Germany); Plag, Ralf [Kernreaktionen und Nukleare Astrophysik, GSI, Darmstadt (Germany); Goethe Universitaet, Frankfurt a.M. (Germany); Collaboration: R3B-Collaboration

2011-07-01

{sup 17}Ne is a proton-dripline nucleus that has raised special interest in nuclear-structure physics in recent years. As a ({sup 15}O+2p) Borromean 3-body system, it is often considered to be a 2-proton-halo nucleus, yet lacking concluding experimental evidence about its structure. We have studied breakup reactions of 500 AMeV {sup 17}Ne secondary beams using the R{sup 3}B-LAND setup at GSI. One focus was on the quasi-free one-proton knockout in a proton-rich paraffin (CH{sub 2}) target in inverse kinematics, i.e., {sup 17}Ne(p,2p){sup 16}F{yields}{sup 15}O+p, in comparison to the one-proton knockout with a carbon target. Recoil protons have been detected with Si-Strip detectors and the surrounding 4{pi} NaI spectrometer ''Crystal Ball'', thus providing a clean signature for quasi-free knockout. First results on two-proton removal cross sections with CH{sub 2} and C targets will be presented, as well as transverse momentum distributions of the {sup 15}O core in {sup 17}Ne. Projectile-like forward protons after one-proton knockout from {sup 17}Ne have been measured in coincidence with the {sup 15}O residual core, leading to the relative-energy spectrum of the unbound {sup 16}F. Possible interpretations and implications regarding the structure of {sup 17}Ne are discussed.

Enhanced diffusion of Zn in Al under Ne irradiation

International Nuclear Information System (INIS)

Myers, S.M.

1975-01-01

The diffusion rate of Zn in Al has been enhanced by factors approximately 10 2 --10 4 under 80 keV Ne irradiation at 130 0 C. Diffusion couples were formed by ion implantation of Zn, and the concentration profiles were determined by ion backscattering. The data are analyzed by numerically solving the coupled diffusion equations for vacancies, interstitials and atoms, and by scaling the profiles of vacancy and interstitial production rates from the theoretical profile of Ne energy into atomic processes. The enhanced diffusion rate is linear in flux, indicating that the mobile point defects annihilate predominantly at fixed sinks. The average distance to annihilation is approximately 700 A, except for the first approximately 500 A of the solid where it is much less. Free vacancies and interstitials are found to be created by the Ne at a smaller rate than the atomic displacement rate, suggesting a high annihilation probability within the parent damage cascade

Excitation of Li and Na atoms in collisions with He and Ne

International Nuclear Information System (INIS)

Olsen, J.Oe.; Andersen, T.; Andersen, N.

1977-01-01

Total emission cross sections and polarizations have been measured for the 2 2 S - 2 2 P, 2 2 P - 3 2 D and 2 2 P - 3 2 S LiI multiplets in Li - He,Ne collisions, and the 3 2 S - 3 2 P and 3 2 P - 3 2 D NaI multiplets in Na - He,Ne collisions in the 0.6 - 60 keV energy range. The excitation of the alkali resonance multiplet is found to be the dominant inelastic process for all four collision systems. The behaviour is very similar to the previously investigated Be + - He,Ne and Mg + - He,Ne systems. The results are compared with recent calculations by Manique et al based on a quasi-one electron description using various model potentials. Good agreement is found for Li - He with a simple Hartree-Fock frozen-core potential. The agreement is fair for Li,Na - He calculations with a Baylis type potential but poor for calculations based on Bottcher model potentials. For Ne as target all three potentials by far overestimate the size of the cross section. (Auth.)

Trends in adverse weather patterns and large wildland fires in Aragón (NE Spain from 1978 to 2010

Directory of Open Access Journals (Sweden)

A. Cardil

2013-05-01

Full Text Available This work analyzes the effects of high temperature days on large wildland fires during 1978–2010 in Aragón (NE Spain. A high temperature day was established when air temperature was higher than 20 °C at 850 hPa. Temperature at 850 hPa was chosen because it properly characterizes the low troposphere state, and some of the problems that affect surface reanalysis do not occur. High temperature days were analyzed from April to October in the study period, and the number of these extreme days increased significantly. This temporal trend implied more frequent adverse weather conditions in later years that could facilitate extreme fire behavior. The effects of those high temperatures days in large wildland fire patterns have been increasingly important in the last years of the series.

AR-NE3A, a New Macromolecular Crystallography Beamline for Pharmaceutical Applications at the Photon Factory

International Nuclear Information System (INIS)

Yamada, Yusuke; Hiraki, Masahiko; Sasajima, Kumiko; Matsugaki, Naohiro; Igarashi, Noriyuki; Kikuchi, Takashi; Mori, Takeharu; Toyoshima, Akio; Kishimoto, Shunji; Wakatsuki, Soichi; Amano, Yasushi; Warizaya, Masaichi; Sakashita, Hitoshi

2010-01-01

Recent advances in high-throughput techniques for macromolecular crystallography have highlighted the importance of structure-based drug design (SBDD), and the demand for synchrotron use by pharmaceutical researchers has increased. Thus, in collaboration with Astellas Pharma Inc., we have constructed a new high-throughput macromolecular crystallography beamline, AR-NE3A, which is dedicated to SBDD. At AR-NE3A, a photon flux up to three times higher than those at existing high-throughput beams at the Photon Factory, AR-NW12A and BL-5A, can be realized at the same sample positions. Installed in the experimental hutch are a high-precision diffractometer, fast-readout, high-gain CCD detector, and sample exchange robot capable of handling more than two hundred cryo-cooled samples stored in a Dewar. To facilitate high-throughput data collection required for pharmaceutical research, fully automated data collection and processing systems have been developed. Thus, sample exchange, centering, data collection, and data processing are automatically carried out based on the user's pre-defined schedule. Although Astellas Pharma Inc. has a priority access to AR-NE3A, the remaining beam time is allocated to general academic and other industrial users.

Probing the Single-Particle Character of Rotational States in F 19 Using a Short-Lived Isomeric Beam

Science.gov (United States)

Santiago-Gonzalez, D.; Auranen, K.; Avila, M. L.; Ayangeakaa, A. D.; Back, B. B.; Bottoni, S.; Carpenter, M. P.; Chen, J.; Deibel, C. M.; Hood, A. A.; Hoffman, C. R.; Janssens, R. V. F.; Jiang, C. L.; Kay, B. P.; Kuvin, S. A.; Lauer, A.; Schiffer, J. P.; Sethi, J.; Talwar, R.; Wiedenhöver, I.; Winkelbauer, J.; Zhu, S.

2018-03-01

A beam containing a substantial component of both the Jπ=5+ , T1 /2=162 ns isomeric state of F 18 and its 1+, 109.77-min ground state is utilized to study members of the ground-state rotational band in F 19 through the neutron transfer reaction (d ,p ) in inverse kinematics. The resulting spectroscopic strengths confirm the single-particle nature of the 13 /2+ band-terminating state. The agreement between shell-model calculations using an interaction constructed within the s d shell, and our experimental results reinforces the idea of a single-particle-collective duality in the descriptions of the structure of atomic nuclei.

VPLIV DIREKTNEGA IN DIFUZNEGA SONČNEGA SEVANJA NA SILICIJEVE SONČNE CELICE

OpenAIRE

Veberič, Tomi

2011-01-01

Cilj diplomske naloge je ovrednotenje električnih lastnosti in vpliva sončnega sevanja na silicijeve sončne celice s pomočjo opravljenih raziskav in meritev. Rezultate meritev sončnega sevanja smo analizirali s programskim paketom Matlab. Pri sami analizi smo na podlagi večletnih meritev sončnega sevanja izračunali izkoristek posamezne silicijeve sončne celice glede na direktno in difuzno komponento sončnega sevanja in tako ovrednotili električne lastnosti sončnih celic. V okviru tega smo v d...

Ferromagnetism in 4H-GaN polytype doped by non-magnetic light elements Li, Be, B, C, O, F, Ne, Na, and Mg: Ab-initio study

International Nuclear Information System (INIS)

Torrichi, M.; Ferhat, M.; Bouhafs, B.

2016-01-01

Using density-functional theory within the generalized-gradient approximation, we explore the magnetic behavior induced by nonmagnetic impurity X atoms, such as Li, Be, B, C, O, F, Ne, Na, and Mg on cation site in 4H-GaN polytype. The results reveal that Ne doped 4H-GaN has the highest magnetic moment of 3µ B , whereas Mg doped 4H-GaN has the lowest magnetic moment of 0.75µ B . Among the systems studied 4H-GaN doped Ne has been found to be half-metallic, whereas 4H-GaN doped F and Na are found to be nearly half-metallic. The partial density of states evidence that magnetism is achieved through a p-p like coupling between the impurity and the host 2p states. Furthermore, we inspect whether there exists a relationship between the spin-polarization and the local structure around the doping X atoms. It is found that for all the compounds studied, the total magnetic moment increases with increasing the X–N bond lengths. Interestingly, 4H-GaN:Be becomes ferromagnetic with increasing the Be–N bond length, whereas 4H-GaN:Na and 4H-GaN:F become half-metallic with increasing Na–N and F–N bond lengths. - Highlights: • The partial densities of states of 4H-GaN polytype doped light nonmagnetic elements have been investigated. • We found that 4H-GaN:Ne is half metallic. • We found that N atoms induced strong local magnetic. • We found that doping with half-filled X-s impurity states promotes ferromagnetism. • We found that doping with full-filled X-s impurity annihilates ferromagnetism.

Anisotropy of electronic states excited in ion-atom collisions

International Nuclear Information System (INIS)

Boskamp, E.B.

1983-01-01

The author reports coincidence measurements made on the He + + Ne and He + + He systems. The complex population amplitudes for the magnetic sublevels of the investigated excited states, Ne(2p 4 3s 2 ) 1 D and He(2p 2 ) 1 D, were completely determined and possible excitation mechanisms are described. (Auth.)

LabVIEW DAQ for NE213 Neutron Detector

International Nuclear Information System (INIS)

Al-Adeeb, Mohammed

2003-01-01

A neutron spectroscopy system, based on a NE213 liquid scintillation detector, to be placed at the Stanford Linear Accelerator Center to measure neutron spectra from a few MeV up to 800 MeV, beyond shielding. The NE213 scintillator, coupled with a Photomultiplier Tube (PMT), detects and converts radiation into current for signal processing. Signals are processed through Nuclear Instrument Modules (NIM) and Computer Automated Measurement and Control (CAMAC) modules. CAMAC is a computer automated data acquisition and handling system. Pulses are properly prepared and fed into an analog to digital converter (ADC), a standard CAMAC module. The ADC classifies the incoming analog pulses into 1 of 2048 digital channels. Data acquisition (DAQ) software based on LabVIEW, version 7.0, acquires and organizes data from the CAMAC ADC. The DAQ system presents a spectrum showing a relationship between pulse events and respective charge (digital channel number). Various photon sources, such as Co-60, Y-88, and AmBe-241, are used to calibrate the NE213 detector. For each source, a Compton edge and reference energy [units of MeVee] is obtained. A complete calibration curve results (at a given applied voltage to the PMT and pre-amplification gain) when the Compton edge and reference energy for each source is plotted. This project is focused to development of a DAQ system and control setup to collect and process information from a NE213 liquid scintillation detector. A manual is created to document the process of the development and interpretation of the LabVIEW-based DAQ system. Future high-energy neutron measurements can be referenced and normalized according to this calibration curve

A Low-Li Geochemical Province in the NE Atlantic

DEFF Research Database (Denmark)

Bailey, J. C.; Gwozdz, R.

1978-01-01

Lithium was analysed in 392 basalts and related igneous rocks from the North Atlantic Tertiary-Recent province using activation analysis and Čerenkov counting. Monotonous Li values of 5.5±2 ppm in NE Atlantic basalts define a low-Li geochemical province which has persisted for 60 million years...... basalt series. No whole-rock coherence is observed between Li and Mg, K, Rb or Ca. Mantle phlogopite is considered to play an insignificant rôle in controlling the Li levels of NE Atlantic basalts....

Adaptive importance sampling of random walks on continuous state spaces

International Nuclear Information System (INIS)

Baggerly, K.; Cox, D.; Picard, R.

1998-01-01

The authors consider adaptive importance sampling for a random walk with scoring in a general state space. Conditions under which exponential convergence occurs to the zero-variance solution are reviewed. These results generalize previous work for finite, discrete state spaces in Kollman (1993) and in Kollman, Baggerly, Cox, and Picard (1996). This paper is intended for nonstatisticians and includes considerable explanatory material

30 CFR 725.19 - Audit.

Science.gov (United States)

2010-07-01

... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Audit. 725.19 Section 725.19 Mineral Resources... REGULATIONS REIMBURSEMENTS TO STATES § 725.19 Audit. The agency shall arrange for an independent audit no less... Circular No. A-102, Attachment P. The audits will be performed in accordance with the “Standards for Audit...

The prototype detection unit of the KM3NeT detector

NARCIS (Netherlands)

Adrian-Martinez, S.; Ageron, M.; Aharonian, F.; Aiello, S.; Albert, A.; Ameli, F.; Anassontzis, E. G.; Androulakis, G. C.; Anghinolfi, M.; Anton, G.; Anvar, S.; Ardid, M.; Avgitas, T.; Balasi, K.; Band, H.; Barbarino, G.; Barbarito, E.; Barbato, F.; Baret, B.; Baron, S.; Barrios, J.; Belias, A.; Berbee, E.; van den Berg, A. M.; Berkien, A.; Bertin, V.; Beurthey, S.; van Beveren, V.; Beverini, N.; Biagi, S.; Biagioni, A.; Bianucci, S.; Billault, M.; Birbas, A.; Rookhuizen, H. Boer; Bormuth, R.; Bouche, V.; Bouhadef, B.; Bourlis, G.; Boutonnet, C.; Bouwhuis, M.; Bozza, C.; Bruijn, R.; Brunner, J.; Cacopardo, G.; Dorosti-Hasankiadeh, Q.; Hevinga, M. A.; Kavatsyuk, O.; Löhner, H.; van Wooning, R. H. L.

2016-01-01

A prototype detection unit of the KM3NeT deep-sea neutrino telescope has been installed at 3500m depth 80 km offshore the Italian coast. KM3NeT in its final configuration will contain several hundreds of detection units. Each detection unit is a mechanical structure anchored to the sea floor, held

The formation and reactivity of the μ+ molecular ion NeMu+

International Nuclear Information System (INIS)

Fleming, D.G.; Mikula, R.J.; Senba, M.; Garner, D.M.; Arseneau, D.J.

1983-06-01

Evidence for the formation and reactivity of the positive muon molecular ion NeMu + at room temperature in a low pressure Ne moderator to which trace amounts of Xe, CH 4 , NH 3 or He have been added, is reported. A two component relaxation of the diamagnetic muon spin rotation (μSR) signal is seen upon the addition of trace amounts of Xe to Ne; a fast relaxing component with bimolecular rate constant (3.6+-0.6) x 10 -10 cc atom -1 s -1 is thought to be due to thermal muonium formation in a charge exchange process while the other slow relaxing component is attributed to a muon transfer reaction, as in proton transfer studies. With CH 4 or NH 3 added to Ne there is, at most, only a very slow relaxation seen, even though thermal muonium formation is expected, in analogy with Xe. These latter results may be due to very fast, possibly tunneling-assisted, muon transfer reactions, the first time that such processes have been at all characterized

Competition between electronic energy transfer and relaxation in Xe doped Ar and Ne matrices studied by photoelectron spectroscopy

International Nuclear Information System (INIS)

Schwentner, N.; Koch, E.E.

1976-01-01

Thin films of solid Ar and Ne doped with 1% Xe were excited with photons in the energy range from 10 eV to 20 eV in order to measure the energy distribution of the emitted electrons. Binding energies of th host and guest levels are deduced. When host excitons are excited, strong emission of electrons is observed indicating an efficient transfer of the host exciton energy to the Xe guest atoms. The energy of the free excitons is transferred, as can be deduced from the kinetic energy of the photoemitted electrons, rather than the energy of the bound (self-trapped) excitons which are observed in luminescence experiments. Furthermore, there is a striking difference between the Ar and the Ne matrix: In the Ne matrix a fast relaxation from the n = 2 to the n = 1 state was observed and only the energy of the n = 1 exciton is transferred even when higher excitons are excited, in contrast to Ar, where the transferred energy is higher for excitation of the n = 2 excitons than for n = 1. From these observations, time hierarchies for the competition between electronic energy transfer and relaxation are deduced. (orig.) [de

Irène Jacob visits CERN

CERN Document Server

CERN Bulletin

2010-01-01

French actress Irène Jacob, the daughter of physicist Maurice Jacob, visited the ATLAS and CMS control rooms on Monday 17 May together with Italian theatre actor-director Pippo Delbono, in search of inspiration for a short film. The film will be screened at the “nuit des particules” event accompanying this year’s ICHEP.   Pippo Delbono et Irène Jacob discussing their project. “La nuit des particules” (night of the particles) is an event open to the general public that is being organised for the evening of Tuesday, 27 July, to accompany the 35th International Conference on High Energy Physics (ICHEP). ICHEP is a major highlight in every physicist’s calendar, and this year’s edition is being held in Paris from 22 to 28 July. The short film will be screened during the evening, which will include a lecture and a show at the legendary Parisian cinema Le Grand Rex, with a colossal seating capacity of 2 700 spe...

49 CFR 565.24 - Motor vehicles imported into the United States.

Science.gov (United States)

2010-10-01

... 49 Transportation 6 2010-10-01 2010-10-01 false Motor vehicles imported into the United States...) REQUIREMENTS Alternative VIN Requirements In Effect for Limited Period § 565.24 Motor vehicles imported into... motor vehicle. (b) A passenger car certified by a Registered Importer under 49 CFR part 592 shall have a...

19 CFR 210.33 - Failure to make or cooperate in discovery; sanctions.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Failure to make or cooperate in discovery; sanctions. 210.33 Section 210.33 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Discovery and Compulsory Process...

Hygiène des réseaux aérauliques

CERN Document Server

Perréal, P

2002-01-01

Dans le domaine de la maintenance des bâtiments, le maintien en hygiène des réseaux de distribution d'air est souvent délaissé, avec les conséquences multiples que cela peut entraîner du point de vue surconsommation énergétique, accroissement du risque d'incendie, et contamination des locaux concernés du point de vue bactériologique. Au CERN, en particulier dans les zones les plus sensibles telles que les restaurants et les locaux à activités chimiques, la mise en place d'un plan de maintenance conditionnelle des gaines de ventilation a permis de maintenir les conditions d'hygiène et de sécurité satisfaisantes. Des méthodes d'inspection vidéo sont utilisées pour décider des actions nécessaires, et selon l'état de pollution constaté, diverses méthodes de nettoyages des gaines peuvent être mises en oeuvre pour rétablir un niveau d'hygiène acceptable. Ce document a pour objet de présenter la problématique liée à l'hygiène de ces réseaux, les techniques utilisées pour faire face ...

19 CFR 210.59 - Responses to the motion and the complaint.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Responses to the motion and the complaint. 210.59 Section 210.59 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Temporary Relief § 210.59 Responses to the motion and...

22 CFR 19.11 - Survivor benefits.

Science.gov (United States)

2010-04-01

... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Survivor benefits. 19.11 Section 19.11 Foreign Relations DEPARTMENT OF STATE PERSONNEL BENEFITS FOR SPOUSES AND FORMER SPOUSES OF PARTICIPANTS IN THE FOREIGN SERVICE RETIREMENT AND DISABILITY SYSTEM § 19.11 Survivor benefits. ...

Análise do Programa de Desenvolvimento do Turismo do Nordeste (Prodetur/NE na perspectiva do planejamento estratégico Analysis of the Tourism Development Program (Pordetur/NE

Directory of Open Access Journals (Sweden)

Maria das Graças de Menezes Venâncio Paiva

2010-04-01

Full Text Available Este artigo analisa o Programa de Desenvolvimento do Turismo no Nordeste (Prode-tur/NE. A análise será feita dentro de uma perspectiva crítica que busca entender sua estrutura de gerenciamento. O programa é baseado em uma abordagem de autossustentabilidade e num moderno gerenciamento que supõe planejamento participativo e estratégico envolvendo parceria e ampla rede a alianças. Somente um elevado grau de consciência entre os vários atores nordestinos poderá garantir o sucesso do programa, o que implica consciência de todos eles em relação à interdependência entre os governos federal, estadual e municipal, bem com o empresariado e as organizações não governamentais (ONGs.This article analyzes the Northeastern Tourism Development Program (Prodetur/NE through a critical perspective seeking to understand its management structure. The program is based on a self-sustainability and modern management approach which assumes participatory and strategic planning involving partnership and a wide alliance network. Only a great dealof consciousness by the different Northeastern actors can guarantee the success of the program. All must be aware of the interdependence between federal, state and local governments, as well as businessmen and non-governmental organizations (NGOs.

Perspective d'avenir du marché de l'hydrogène Future Outlook of the Hydrogen Market

Directory of Open Access Journals (Sweden)

Ozmen S.

2006-11-01

Full Text Available L'hydrogène qui avait été jusqu'à présent produit à partir des hydrocarbures pour des usages chimiques devra dans les années futures, trouver un marché nouveau qui sera foncfion du développement des centrales nucléaires. Par utilisation de l'énergie électrique ou thermique disponible aux heures creuses, la décomposition de l'eau par voie électrolytique ou thermique (cycle d'oxydoréduction produirait l'hydrogène; gaz stockable et transportable. En plus de la consommation de l'hydrogène pour usage chimique-fabrication du méthanol, de l'ammoniac, hydrotraitement des fractions pétrolières, la métallurgie,... dont l'importance va croître, on envisage l'emploi de l'hydrogène comme véhicule d'énergie. Up to now, hydrogen has been produced from hydrocarbons for chemical uses. In the future, if will have to find a new market for itself which will depend on the development of nucleor power plants. Through the use of electric or thermal energy available during off-peak hours, water decomposition by electrolic or thermal methods (redox cycle could produce hydrogen, a storable and transportable gas. In addition to hydrogen consumption for chemical uses (manufacturing methanol, ammonia, hydrotreating petroleum fractions, metallurgy, etc. which will become greater, plans are being drawn up to use hydrogen as a vehicle for energy.

Study of Electromagnetic Interactions in the MicroBooNE Liquid Argon Time Projection Chamber

Energy Technology Data Exchange (ETDEWEB)

Caratelli, David [Columbia U.

2018-01-01

This thesis presents results on the study of electromagnetic (EM) activity in the MicroBooNE Liquid Argon Time Projection Chamber (LArTPC) neutrino detector. The LArTPC detector technology provides bubble-chamber like information on neutrino interaction final states, necessary to perform precision measurements of neutrino oscillation parameters. Accelerator-based oscillation experiments heavily rely on the appearance channel ! e to make such measurements. Identifying and reconstructing the energy of the outgoing electrons from such interactions is therefore crucial for their success. This work focuses on two sources of EM activity: Michel electrons in the 10-50 MeV energy range, and photons from 0 decay in the 30-300 MeV range. Studies of biases in the energy reconstruction measurement, and energy resolution are performed. The impact of shower topology at different energies is discussed, and the importance of thresholding and other reconstruction effects on producing an asymmetric and biased energy measurement are highlighted. This work further presents a study of the calorimetric separation of electrons and photons with a focus on the shower energy dependence of the separation power.

3. Ganil session, 19 - 21 November 1979

International Nuclear Information System (INIS)

1979-11-01

This report on the GANIL meetings held at CAEN the 19th, 20th and 21st of November 1979 treats first of all the opening presentation on the state of advancement of the project and the most recent principal characteristics of the beams. The texts of the sixteen adjoining papers cover an important stage in the evolution between the discussions of the 1977 meetings and the beam that we hope will be available at the end of 1982 [fr

19 CFR 210.14 - Amendments to pleadings and notice; supplemental submissions; counterclaims.

Science.gov (United States)

2010-04-01

... 19 Customs Duties 3 2010-04-01 2010-04-01 false Amendments to pleadings and notice; supplemental submissions; counterclaims. 210.14 Section 210.14 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Pleadings § 210.14 Amendments to...

Coulomb Dissociation of {sup 17}Ne and its role for nuclear astrophysics

Energy Technology Data Exchange (ETDEWEB)

Marganiec, Justyna [ExtreMe Matter Institute EMMI, GSI, Darmstadt (Germany); Aumann, Thomas; Wamers, Felix [Kernreaktion und Nuklear Astrophysik, GSI, Darmstadt (Germany); Institut fuer Kernphysik, TU, Darmstadt (Germany); Heil, Michael [Kernreaktion und Nuklear Astrophysik, GSI, Darmstadt (Germany); Plag, Ralf [Kernreaktion und Nuklear Astrophysik, GSI, Darmstadt (Germany); Goethe-Universitaet, Frankfurt am Main (Germany); Collaboration: R3B-Collaboration

2011-07-01

The study of the Coulomb break up of {sup 17}Ne gives us an access to information about the time-reversed reaction {sup 15}O(2p,{gamma}){sup 17}Ne, which could serve as a bypass of {sup 15}O waiting point during the rp process, and move the initial CNO material towards heavier nuclei. The three-body radiative capture can proceed sequentially (J. Goerres, et al., Phys. Rev. C 51, 392, 1995) or directly from the three-body continuum (L.V. Grigorenko, M.V. Zhukov, Phys. Rev. C 72, 015803, 2005). It has been suggested that the reaction rate can be enhanced by a few orders of magnitude by taking into account the three-body continuum. In order to verify these calculations, the {sup 15}O(2p,{gamma}){sup 17}Ne cross section has been investigated. The experiment has been performed at the LAND/R{sup 3}B setup at GSI, using the fragment separator FRS to select a {sup 17}Ne secondary beam.

Beta-delayed proton emission from {sup 20}Mg

Energy Technology Data Exchange (ETDEWEB)

Lund, M.V.; Fynbo, H.O.U.; Howard, A.M.; Kirsebom, O.S.; Munch, M.; Riisager, K. [Aarhus University, Department of Physics and Astronomy, Aarhus C (Denmark); Andreyev, A.; Wadsworth, R. [University of York, Department of Physics, York (United Kingdom); Borge, M.J.G. [CSIC, Instituto de Estructura de la Materia, Madrid (Spain); CERN, ISOLDE, PH Department, Geneva 23 (Switzerland); Cederkaell, J. [Lund University, Department of Nuclear Physics, Lund (Sweden); Witte, H. de; Huyse, M.; Duppen, P. van [Instituut voor Kern- en Stralingsfysica, KU-Leuven, Leuven (Belgium); Fraile, L.M.; Vedia, V. [Universidad Complutense de Madrid, CEI Moncloa, Facultad de Ciencias Fisicas, Madrid (Spain); Greenlees, P.T.; Konki, J.; Rahkila, P. [University of Helsinki, Helsinki Institute of Physics, Helsinki (Finland); University of Jyvaeskylae, Department of Physics, Jyvaeskylae (Finland); Harkness-Brennan, L.J.; Judson, D.S.; Page, R.D. [University of Liverpool, Department of Physics, Oliver Lodge Laboratory, Liverpool (United Kingdom); Jonson, B.; Lindberg, S.; Nilsson, T. [Chalmers University of Technology, Department of Physics, Goeteborg (Sweden); Kurcewicz, J.; Madurga, M.; Rapisarda, E. [CERN, ISOLDE, PH Department, Geneva (Switzerland); Lazarus, I.; Pucknell, V. [STFC Daresbury, Daresbury, Warrington (United Kingdom); Lica, R. [CERN, ISOLDE, PH Department, Geneva (Switzerland); ' ' Horia Hulubei' ' National Institute of Physics and Nuclear Engineering, Magurele (Romania); Marginean, N.; Marginean, R.; Mihai, C.; Negret, A.; Pascu, S.; Rotaru, F.; Stanoiu, M.; Turturica, A. [' ' Horia Hulubei' ' National Institute of Physics and Nuclear Engineering, Magurele (Romania); Marroquin, I.; Nacher, E.; Perea, A.; Tengblad, O. [CSIC, Instituto de Estructura de la Materia, Madrid (Spain); Sotty, C. [Instituut voor Kern- en Stralingsfysica, KU-Leuven, Leuven (Belgium); ' ' Horia Hulubei' ' National Institute of Physics and Nuclear Engineering, Magurele (Romania); Warr, N. [Universitaet Koeln, Institut fuer Kernphysik, Koeln (Germany); Collaboration: IDS Collaboration

2016-10-15

Beta-delayed proton emission from {sup 20} Mg has been measured at ISOLDE, CERN, with the ISOLDE Decay Station (IDS) setup including both charged-particle and gamma-ray detection capabilities. A total of 27 delayed proton branches were measured including seven so far unobserved. An updated decay scheme, including three new resonances above the proton separation energy in {sup 20}Na and more precise resonance energies, is presented. Beta-decay feeding to two resonances above the Isobaric Analogue State (IAS) in {sup 20}Na is observed. This may allow studies of the 4032.9(2.4) keV resonance in {sup 19}Ne through the beta decay of {sup 20}Mg, which is important for the astrophysically relevant reaction {sup 15}O(α, γ){sup 19}Ne. Beta-delayed protons were used to obtain a more precise value for the half-life of {sup 20}Mg, 91.4(1.0) ms. (orig.)

Beam dynamics studies at DAΦNE: from ideas to experimental results

Science.gov (United States)

Zobov, M.; DAΦNE Team

2017-12-01

DAΦNE is the electron-positron collider operating at the energy of Φ-resonance, 1 GeV in the center of mass. The presently achieved luminosity is by about two orders of magnitude higher than that obtained at other colliders ever operated at this energy. Careful beam dynamic studies such as the vacuum chamber design with low beam coupling impedance, suppression of different kinds of beam instabilities, investigation of beam-beam interaction, optimization of the beam nonlinear motion have been the key ingredients that have helped to reach this impressive result. Many novel ideas in accelerator physics have been proposed and/or tested experimentally at DAΦNE for the first time. In this paper we discuss the advanced accelerator physics studies performed at DAΦNE.

Atomic data and spectral line intensities for Ne III

CERN Document Server

Bhatia, A K; Landi, E

2003-01-01

Electron impact collision strengths, energy levels, oscillator strengths and spontaneous radiative decay rates are calculated for Ne III. The configurations used are 2s sup 2 2p sup 4 , 2s2p sup 5 , 2s sup 2 2p sup 3 3s, and 2s sup 2 2p sup 3 3d giving rise to 57 fine-structure levels in intermediate coupling. Collision strengths are calculated at five incident energies, 5, 15, 25, 35, and 45 Ry. Excitation rate coefficients are calculated by assuming a Maxwellian electron velocity distribution at an electron temperature of logT sub e (K)=5.0, corresponding to maximum abundance of Ne III. Using the excitation rate coefficients and the radiative transition rates, statistical equilibrium equations for level populations are solved at electron densities covering the range of 10 sup 8 -10 sup 1 sup 4 cm sup - sup 3. Relative spectral line intensities are calculated. Proton excitation rates between the lowest three levels have been included in the statistical equilibrium equations. The predicted Ne III line intensi...

Studies on laser-assisted Penning ionization by the optogalvanic effect in Ne/Eu hollow cathode discharge.

Science.gov (United States)

Saini, V K; Kumar, P; Dixit, S K; Nakhe, S V

2015-02-01

Laser-assisted Penning ionization (LAPI) is detected in a Ne/Eu hollow cathode (HC) discharge lamp using the pulsed optogalvanic (OG) method. In the Ne/Eu discharge, doubly ionized europium excited energy levels Eu[4f(7)(P(7/2,5/2)6)] lie within the thermal limit (∼kT) from the laser-excited neon's energy level [2p(5)(P3/202)3p or 2p(8) (in Paschen notation)] lying at 149,848  cm(-1). Therefore, Penning ionization (PI) of europium atoms likely to occur into its highly excited ionic states is investigated. To probe the PI of europium, the temporal profiles of its counterpart neon OG signal are studied as a function of discharge current for the transitions (1s(4)→2p(8)) and (1s(2)→2p(2)), corresponding to 650.65 and 659.89 nm wavelengths, respectively. It is observed that PI of europium alters the overall discharge characteristics significantly and, hence, modifies the temporal profile of the OG signals accordingly. The quasi-resonant ionizing energy transfer collisions between laser-excited Ne 2p(8) atoms and electronically excited europium P(9/2)10 atoms are used to explain the LAPI mechanism. Such LAPI studies carried out in HC discharge could be useful for the discharge of a metal-vapor laser with appropriate Penning mixtures.

77 FR 4713 - Proposed Establishment of Class E Airspace; Red Cloud, NE

Science.gov (United States)

2012-01-31

...-0426; Airspace Docket No. 11-ACE-7] Proposed Establishment of Class E Airspace; Red Cloud, NE AGENCY... action proposes to establish Class E airspace at Red Cloud, NE. Controlled airspace is necessary to accommodate new Standard Instrument Approach Procedures (SIAP) at Red Cloud Municipal Airport. The FAA is...

Neutrinos from the NuMI beamline in the MiniBooNE detector

International Nuclear Information System (INIS)

Aguilar-Arevalo, Alexis A.

2006-01-01

With the startup of the NuMI beamline early in 2005, the MiniBooNE detector has the unique opportunity to be the first user of an off-axis neutrino beam (110 mrad off-axis). MiniBooNE is assembling a rich sample of neutrino interactions from this source

34 CFR 300.19 - Homeless children.

Science.gov (United States)