WorldWideScience

Sample records for atomic binding energy

  1. Atom-solid binding energy shifts for K 2p and Rb 3d sublevels

    International Nuclear Information System (INIS)

    Holappa, M.; Aksela, S.; Patanen, M.; Urpelainen, S.; Aksela, H.

    2011-01-01

    Highlights: → Binding energy shifts between atom and solid. K 2p and Rb 3d sublevels were studied. → Simultaneous measurements give accurate results. → Results can be used as a reference for cluster studies. - Abstract: Binding energy shifts between free and solid state atoms for K 2p and Rb 3d photolines have been determined by measuring the vapor and solid state spectra simultaneously in similar experimental conditions applying synchrotron radiation excited photoelectron spectroscopy. This method has the important benefit that the work function is not needed to correct for different reference energy levels, therefore much more accurate values for binding energy shifts are obtained.

  2. Estimating Atomic Contributions to Hydration and Binding Using Free Energy Perturbation.

    Science.gov (United States)

    Irwin, Benedict W J; Huggins, David J

    2018-05-08

    We present a general method called atom-wise free energy perturbation (AFEP), which extends a conventional molecular dynamics free energy perturbation (FEP) simulation to give the contribution to a free energy change from each atom. AFEP is derived from an expansion of the Zwanzig equation used in the exponential averaging method by defining that the system total energy can be partitioned into contributions from each atom. A partitioning method is assumed and used to group terms in the expansion to correspond to individual atoms. AFEP is applied to six example free energy changes to demonstrate the method. Firstly, the hydration free energies of methane, methanol, methylamine, methanethiol, and caffeine in water. AFEP highlights the atoms in the molecules that interact favorably or unfavorably with water. Finally AFEP is applied to the binding free energy of human immunodeficiency virus type 1 protease to lopinavir, and AFEP reveals the contribution of each atom to the binding free energy, indicating candidate areas of the molecule to improve to produce a more strongly binding inhibitor. FEP gives a single value for the free energy change and is already a very useful method. AFEP gives a free energy change for each "part" of the system being simulated, where part can mean individual atoms, chemical groups, amino acids, or larger partitions depending on what the user is trying to measure. This method should have various applications in molecular dynamics studies of physical, chemical, or biochemical phenomena, specifically in the field of computational drug discovery.

  3. Simple method for determining binding energies of fullerene and complex atomic negative ions

    Science.gov (United States)

    Felfli, Zineb; Msezane, Alfred

    2017-04-01

    A robust potential which embeds fully the vital core polarization interaction has been used in the Regge pole method to explore low-energy electron scattering from C60, Eu and Nb through the total cross sections (TCSs) calculations. From the characteristic dramatically sharp resonances in the TCSs manifesting negative ion formation in these systems, we extracted the binding energies for the C60, Euand Nbanions they are found to be in outstanding agreement with the measured electron affinities of C60, Eu and Nb. Common among these considered systems, including the standard atomic Au is the formation of their ground state negative ions at the second Ramsauer-Townsend (R-T) minima of their TCSs. Indeed, this is a signature of all the fullerenes and complex atoms considered thus far. Shape resonances, R-T minima and binding energies of the resultant anions are presented. This work was supported by U.S. DOE, Basic Energy Sciences, Office of Energy Research.

  4. Effects of the atomic environment on the electron binding energies in samarium

    Czech Academy of Sciences Publication Activity Database

    Inoyatov, A. K.; Kovalík, Alojz; Filosofov, D. V.; Ryšavý, Miloš; Vénos, Drahoslav; Yushkevich, Y. V.; Perevoshchikov, L. L.; Zhdanov, V. S.

    2016-01-01

    Roč. 207, FEB (2016), s. 38-49 ISSN 0368-2048 R&D Projects: GA ČR(CZ) GAP203/12/1896; GA MŠk LG14004 Institutional support: RVO:61389005 Keywords : Sm-149 * atomic environment * electron ginding energy * intermediate-valence state * chemical shift * natural atomic level width Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 1.661, year: 2016

  5. Numerical comparison of atomic binding energies calculated by Thomas-Fermi like formulas

    International Nuclear Information System (INIS)

    Donnamaria, M.C.; Castro, E.A.; Fernandez, F.M.

    1985-01-01

    We apply in an exhaustive way formulas of Thomas-Fermi nature to determine atomic ground state energies. Results are compared with Hartree-Fock SCF data and the different methods are analysed in a comparative fashion. (authors)

  6. Coordination-resolved local bond contraction and electron binding-energy entrapment of Si atomic clusters and solid skins

    Energy Technology Data Exchange (ETDEWEB)

    Bo, Maolin; Huang, Yongli; Zhang, Ting [Key Laboratory of Low-Dimensional Materials and Application Technologies, Xiangtan University, Hunan 411105 (China); Wang, Yan, E-mail: ywang8@hnust.edu.cn, E-mail: ecqsun@ntu.edu.sg [Key Laboratory of Low-Dimensional Materials and Application Technologies, Xiangtan University, Hunan 411105 (China); School of Information and Electronic Engineering, Hunan University of Science and Technology, Hunan 411201 (China); Zhang, Xi [School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 (Singapore); Li, Can [Center for Coordination Bond Engineering, School of Materials Science and Engineering, China Jiliang University, Hangzhou 330018 (China); Sun, Chang Q., E-mail: ywang8@hnust.edu.cn, E-mail: ecqsun@ntu.edu.sg [Key Laboratory of Low-Dimensional Materials and Application Technologies, Xiangtan University, Hunan 411105 (China); School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 (Singapore); Center for Coordination Bond Engineering, School of Materials Science and Engineering, China Jiliang University, Hangzhou 330018 (China)

    2014-04-14

    Consistency between x-ray photoelectron spectroscopy measurements and density-function theory calculations confirms our bond order-length-strength notation-incorporated tight-binding theory predictions on the quantum entrapment of Si solid skin and atomic clusters. It has been revealed that bond-order deficiency shortens and strengthens the Si-Si bond, which results in the local densification and quantum entrapment of the core and valence electrons. Unifying Si clusters and Si(001) and (111) skins, this mechanism has led to quantification of the 2p binding energy of 96.089 eV for an isolated Si atom, and their bulk shifts of 2.461 eV. Findings evidence the significance of atomic undercoordination that is of great importance to device performance.

  7. On the atomic-number similarity of the binding energies of electrons in filled shells of elements of the periodic table

    Science.gov (United States)

    Karpov, V. Ya.; Shpatakovskaya, G. V.

    2017-03-01

    An expression for the binding energies of electrons in the ground state of an atom is derived on the basis of the Bohr-Sommerfeld quantization rule within the Thomas-Fermi model. The validity of this relation for all elements from neon to uranium is tested within a more perfect quantum-mechanical model with and without the inclusion of relativistic effects, as well as with experimental binding energies. As a result, the ordering of electronic levels in filled atomic shells is established, manifested in an approximate atomic-number similarity. It is proposed to use this scaling property to analytically estimate the binding energies of electrons in an arbitrary atom.

  8. On the atomic-number similarity of the binding energies of electrons in filled shells of elements of the periodic table

    Energy Technology Data Exchange (ETDEWEB)

    Karpov, V. Ya. [Bruk Institute of Electronic Control Machines (Russian Federation); Shpatakovskaya, G. V., E-mail: shpagalya@yandex.ru [Russian Academy of Sciences, Keldysh Institute of Applied Mathematics (Russian Federation)

    2017-03-15

    An expression for the binding energies of electrons in the ground state of an atom is derived on the basis of the Bohr–Sommerfeld quantization rule within the Thomas–Fermi model. The validity of this relation for all elements from neon to uranium is tested within a more perfect quantum-mechanical model with and without the inclusion of relativistic effects, as well as with experimental binding energies. As a result, the ordering of electronic levels in filled atomic shells is established, manifested in an approximate atomic-number similarity. It is proposed to use this scaling property to analytically estimate the binding energies of electrons in an arbitrary atom.

  9. Atomistic modeling determination of placeholder binding energy of Ti, C, and N atoms on a-Fe (100) surfaces

    International Nuclear Information System (INIS)

    Wei, X J; Liu, Y P; Han, S P

    2015-01-01

    A Fe(100) surface containing Ti, C, and N was constructed and optimized to study the placeholder binding energy of the Ti, C, and N surface atoms; this was achieved by searching the transition state with the LST (linear synchronous transit) method of the CASTEP (Cambridge Serial Total Energy Package) module. Also, the authors analyzed electron structures to determine how Ti, C, and N atoms strengthen the Fe(100) surface. The results show that when Ti, C, or N atoms take placeholder alone, or simultaneously at the Fe(100) surface, the structure stability is at its best. When including Ti, C, and N as solid solutions on the Fe(100) surface, orbital electrons of Fe3d, Ti3d, C2p, and N2p hybridize near the Fermi level; the number of electronic bonding peaks increase and bonding capacity enhances. Also, a large amount of covalent bonds formed. Covalent bonds and metallic bond coexisted. (paper)

  10. Atomic energy

    International Nuclear Information System (INIS)

    Ramanna, R.

    1978-01-01

    Development of nuclear science in India, particularly the research and development work at the Bhabha Atomic Research Centre (BARC), Bombay, is described. Among the wide range of materials developed for specific functions under rigorous conditions are nuclear pure grade uranium, zirconium and beryllium, and conventional materials like aluminium, carbon steel and stainless steels. Radioisotopes are produced and used for tracer studies in various fields. Various types of nuclear gauges and nuclear instruments are produced. Radiations have been used to develop new high yielding groundnut mutants with large kernals. The sterile male technique for pest control and radiosterilization technique to process potatoes, onions and marine foods for storage are ready for exploitation. Processes and equipment have been developed for production of electrolytic hydrogen, electrothermal phosphorus and desalinated water. Indigenously manufactured components and materials are now being used for the nuclear energy programme. Indian nuclear power programme strategy is to build heavy water reactors and to utilise their byproduct plutonium and depleted uranium to feed fast breeder reactors which will produce more fissile material than burnt. Finally a special mention has been made of the manpower development programme of the BARC. BARC has established a training school in 1957 giving advanced training in physics, chemistry and various branches of engineering and metallurgy

  11. Core-electron binding energies from self-consistent field molecular orbital theory using a mixture of all-electron real atoms and valence-electron model atoms

    International Nuclear Information System (INIS)

    Quinn, C.M.; Schwartz, M.E.

    1981-01-01

    The chemistry of large systems such as clusters may be readily investigated by valence-electron theories based on model potentials, but such an approach does not allow for the examination of core-electron binding energies which are commonly measured experimentally for such systems. Here we merge our previously developed Gaussian based valence-electron model potential theory with all-electron ab initio theory to allow for the calculation of core orbital binding energies when desired. For the atoms whose cores are to be examined, we use the real nuclear changes, all of the electrons, and the appropriate many-electron basis sets. For the rest of the system we use reduced nuclear charges, the Gaussian based model potentials, only the valence electrons, and appropriate valence-electron basis sets. Detailed results for neutral Al 2 are presented for the cases of all-electron, mixed real--model, and model--model SCF--MO calculations. Several different all-electron and valence electron calculations have been done to test the use of the model potential per se, as well as the effect of basis set choice. The results are in all cases in excellent agreement with one another. Based on these studies, a set of ''double-zeta'' valence and all-electron basis functions have been used for further SCF--MO studies on Al 3 , Al 4 , AlNO, and OAl 3 . For a variety of difference combinations of real and model atoms we find excellent agreement for relative total energies, orbital energies (both core and valence), and Mulliken atomic populations. Finally, direct core-hole-state ionic calculations are reported in detail for Al 2 and AlNO, and noted for Al 3 and Al 4 . Results for corresponding frozen-orbital energy differences, relaxed SCF--MO energy differences, and relaxation energies are in all cases in excellent agreement (never differing by more than 0.07 eV, usually by somewhat less). The study clearly demonstrates the accuracy of the mixed real--model theory

  12. Observation of core-level binding energy shifts between (100) surface and bulk atoms of epitaxial CuInSe{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, A.J. [Colorado School of Mines, Golden, CO (United States); Berry, G.; Rockett, A. [Univ. of Illinois, Urbana-Champaign, IL (United States)] [and others

    1997-04-01

    Core-level and valence band photoemission from semiconductors has been shown to exhibit binding energy differences between surface atoms and bulk atoms, thus allowing one to unambiguously distinguish between the two atomic positions. Quite clearly, surface atoms experience a potential different from the bulk due to the lower coordination number - a characteristic feature of any surface is the incomplete atomic coordination. Theoretical accounts of this phenomena are well documented in the literature for III-V and II-VI semiconductors. However, surface state energies corresponding to the equilibrium geometry of (100) and (111) surfaces of Cu-based ternary chalcopyrite semiconductors have not been calculated or experimental determined. These compounds are generating great interest for optoelectronic and photovoltaic applications, and are an isoelectronic analog of the II-VI binary compound semiconductors. Surface core-level binding energy shifts depend on the surface cohesive energies, and surface cohesive energies are related to surface structure. For ternary compound semiconductor surfaces, such as CuInSe{sub 2}, one has the possibility of variations in surface stoichiometry. Applying standard thermodynamical calculations which consider the number of individual surface atoms and their respective chemical potentials should allow one to qualitatively determine the magnitude of surface core-level shifts and, consequently, surface state energies.

  13. Observation of core-level binding energy shifts between (100) surface and bulk atoms of epitaxial CuInSe2

    International Nuclear Information System (INIS)

    Nelson, A.J.; Berry, G.; Rockett, A.

    1997-01-01

    Core-level and valence band photoemission from semiconductors has been shown to exhibit binding energy differences between surface atoms and bulk atoms, thus allowing one to unambiguously distinguish between the two atomic positions. Quite clearly, surface atoms experience a potential different from the bulk due to the lower coordination number - a characteristic feature of any surface is the incomplete atomic coordination. Theoretical accounts of this phenomena are well documented in the literature for III-V and II-VI semiconductors. However, surface state energies corresponding to the equilibrium geometry of (100) and (111) surfaces of Cu-based ternary chalcopyrite semiconductors have not been calculated or experimental determined. These compounds are generating great interest for optoelectronic and photovoltaic applications, and are an isoelectronic analog of the II-VI binary compound semiconductors. Surface core-level binding energy shifts depend on the surface cohesive energies, and surface cohesive energies are related to surface structure. For ternary compound semiconductor surfaces, such as CuInSe 2 , one has the possibility of variations in surface stoichiometry. Applying standard thermodynamical calculations which consider the number of individual surface atoms and their respective chemical potentials should allow one to qualitatively determine the magnitude of surface core-level shifts and, consequently, surface state energies

  14. Near relativistic study of binded levels in atoms. Application to alkaline atoms

    International Nuclear Information System (INIS)

    Varade, A.; Delgado-Barrio, G.; Villarreal, P.

    1985-01-01

    A model is described for the calculation of the atomic binding energies. The Pauli equation has been solved with a local potential. The results for alkaline atoms are reported here and compared with the perturbative calculation and experimental data. (author)

  15. Atomic Energy Control Act

    International Nuclear Information System (INIS)

    1970-01-01

    This act provides for the establishment of the Atomic Energy Control Board. The board is responsible for the control and supervision of the development, application and use of atomic energy. The board is also considered necessary to enable Canada to participate effectively in measures of international control of atomic energy

  16. High-energy atomic physics

    CERN Document Server

    Drukarev, Evgeny G

    2016-01-01

    This self-contained text introduces readers to the field of high-energy atomic physics - a new regime of photon-atom interactions in which the photon energies significantly exceed the atomic or molecular binding energies, and which opened up with the recent advent of new synchrotron sources. From a theoretical point of view, a small-parameter characteristic of the bound system emerged, making it possible to perform analytic perturbative calculations that can in turn serve as benchmarks for more powerful numerical computations. The first part of the book introduces readers to the foundations of this new regime and its theoretical treatment. In particular, the validity of the small-parameter perturbation expansion and of the lowest-order approximation is critically reviewed. The following chapters then apply these insights to various atomic processes, such as photoionization as a many-body problem, dominant mechanisms for the production of ions at higher energies, Compton scattering and ionization accompanied b...

  17. Atomic Energy Authority Bill

    International Nuclear Information System (INIS)

    Gray, J.H.N.; Stoddart, D.L.; Sinclair, R.M.; Ezra, D.

    1985-01-01

    The House, in Committee, discussed the following matters in relation to the Atomic Energy Authority Bill; financing; trading; personnel conditions of employment; public relations; organization; research programmes; fuels; energy sources; information dissemination. (U.K.)

  18. Atomic Energy Control Board

    International Nuclear Information System (INIS)

    Blackman, N.S.; Gummer, W.K.

    1982-02-01

    This paper has been prepared to provide an overview of the responsibilities and activities of the Atomic Energy Control Board. It is designed to address questions that are often asked concerning the establishment of the Atomic Energy Control Board, its enabling legislation, licensing and compliance activities, federal-provincial relationships, international obligations, and communications with the public

  19. Atomic energy for progress

    International Nuclear Information System (INIS)

    1974-01-01

    The film discusses the functions and activities of the Philippine Atomic Energy Commission. Shown are the applications of atomic energy in research, agriculture, engineering, industry and medicine, as well as the construction of the research reactor and its inauguration by President Marcos

  20. Atomic Energy Control Regulations

    International Nuclear Information System (INIS)

    1992-01-01

    This is the consolidated text of the Atomic Energy Control Regulations of 17 March 1960, with amendments to 27 August 1992. The Regulations cover the licensing of nuclear facilities, radiation sources, including uranium mining, radiation protection questions, etc. (NEA)

  1. Atomic Energy Act 1946

    International Nuclear Information System (INIS)

    1946-01-01

    This Act provides for the development of atomic energy in the United Kingdom and for its control. It details the duties and powers of the competent Minister, in particular his powers to obtain information on and to inspect materials, plant and processes, to control production and use of atomic energy and publication of information thereon. Also specified is the power to search for and work minerals and to acquire property. (NEA) [fr

  2. The Atomic Energy Control Board

    International Nuclear Information System (INIS)

    Doern, G.B.

    1976-01-01

    This study describes and assesses the regulatory and administrative processes and procedures of the Atomic Energy Control Board, the AECB. The Atomic Energy Control Act authorized the AECB to control atomic energy materials and equipment in the national interest and to participate in measures for the international control of atomic energy. The AECB is authorized to make regulations to control atomic energy materials and equipment and to make grants in support of atomic energy research. (author)

  3. FAO and atomic energy

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1960-07-15

    During the past six years FAO has become more engaged in work concerned with atomic energy. In 1957 it established an Atomic Energy Branch. The new forces and new tools which have become available for use in the fight against poverty, disease and malnutrition can be of the greatest assistance in FAO's work in nearly all phases of the production, storage and distribution of food and other agricultural products. The Organization promotes their use to improve the standards of feeding, clothing and housing throughout the world. Another side of work related to atomic energy is concerned with combating contamination from the use of atomic energy for power production and other purposes. This raises considerable problems for food and agriculture, so that FAO also has a responsibility for assisting Governments in safeguarding their food and food-producing resources from contamination. FAO is essentially concerned with fostering wider knowledge of the many contributions that atomic science can make to agriculture, forestry, fisheries and nutrition. It is also concerned in assisting governments to establish sound programmes for applying atomic science in food and agriculture. One way of spreading such knowledge is through the publication of documents and reports

  4. FAO and atomic energy

    International Nuclear Information System (INIS)

    1960-01-01

    During the past six years FAO has become more engaged in work concerned with atomic energy. In 1957 it established an Atomic Energy Branch. The new forces and new tools which have become available for use in the fight against poverty, disease and malnutrition can be of the greatest assistance in FAO's work in nearly all phases of the production, storage and distribution of food and other agricultural products. The Organization promotes their use to improve the standards of feeding, clothing and housing throughout the world. Another side of work related to atomic energy is concerned with combating contamination from the use of atomic energy for power production and other purposes. This raises considerable problems for food and agriculture, so that FAO also has a responsibility for assisting Governments in safeguarding their food and food-producing resources from contamination. FAO is essentially concerned with fostering wider knowledge of the many contributions that atomic science can make to agriculture, forestry, fisheries and nutrition. It is also concerned in assisting governments to establish sound programmes for applying atomic science in food and agriculture. One way of spreading such knowledge is through the publication of documents and reports

  5. US Atomic Energy Law

    International Nuclear Information System (INIS)

    1981-01-01

    This is a new volume follows in the series supplementing the volumes 11 and 12 published in 1965 and 1966, updating the collection of Federal Acts and Executive Orders of the President of the United States of America relating to atomic energy legislation. Since the publication of volumes 11 and 12, the US Atomic Energy Act of 1954 alone has been amended 25 times, mainly as a consequence of by the Nuclear Non-Proliferation Act and the Uranium Mill Tailings Radiation Control Act, both of 1978. The Atomic Energy Act of 1954 is supplemented by a selection of the most important Federal Acts, Executive Orders of the President and Resolutions of the Congress. (orig./HSCH) [de

  6. UNESCO and atomic energy

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1960-01-15

    Atomic energy has been of particular concern to UNESCO virtually since the founding of this United Nations agency with the mission of promoting the advancement of science along with education and culture. UNESCO has been involved in the scientific aspects of nuclear physics - notably prior to the creation of the International Atomic Energy Agency - but it has also focussed its attention upon the educational and cultural problems of the atomic age. UNESCO's sphere of action was laid down by its 1954 General Conference which authorized its Director-General to extend full co-operation to the United Nations in atomic energy matters, with special reference to 'the urgent study of technical questions such as those involved in the effects of radioactivity on life in general, and to the dissemination of objective information concerning all aspects of the peaceful utilization of atomic energy; to study, and if necessary, to propose measures of international scope to facilitate the use of radioisotopes in research and industry'. UNESCO's first action under this resolution was to call a meeting of a committee of experts from twelve nations to study the establishment of a system of standards and regulations for the preparation, distribution, transport and utilization of radioactive isotopes and tracer molecules

  7. Accelerators for atomic energy research

    International Nuclear Information System (INIS)

    Shibata, Tokushi

    1999-01-01

    The research and educational activities accomplished using accelerators for atomic energy research were studied. The studied items are research subjects, facility operation, the number of master theses and doctor theses on atomic energy research using accelerators and the future role of accelerators in atomic energy research. The strategy for promotion of the accelerator facility for atomic energy research is discussed. (author)

  8. Atomic energy and you

    International Nuclear Information System (INIS)

    1975-01-01

    The film discusses the peaceful applications of atomic energy in agriculture, engineering, industry and medicine. Shows exploration, prospecting and mining of uraninum ores at Larap, Camarines Norte and the study of geographical conditions of the site for the proposed Nuclear Power Plant in Bataan

  9. Energy flux of hot atoms

    International Nuclear Information System (INIS)

    Wotzak, G.P.; Kostin, M.D.

    1976-01-01

    The process in which hot atoms collide with thermal atoms of a gas, transfer kinetic energy to them, and produce additional hot atoms is investigated. A stochastic method is used to obtain numerical results for the spatial and time dependent energy flux of hot atoms in a gas. The results indicate that in hot atom systems a front followed by an intense energy flux of hot atoms may develop

  10. Meteorology and atomic energy

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    The science of meteorology is useful in providing information that will be of assistance in the choice of favorable plant locations and in the evaluation of significant relations between meteorology and the design, construction, and operation of plant and facilities, especially those from which radioactive or toxic products could be released to the atmosphere. Under a continuing contract with the Atomic Energy Commission, the Weather Bureau has carried out this study. Some of the meteorological techniques that are available are summarized, and their applications to the possible atmospheric pollution deriving from the use of atomic energy are described. Methods and suggestions for the collection, analysis, and use of meteorological data are presented. Separate abstracts are included of 12 chapters in this publication for inclusion in the Energy Data Base

  11. Calculation of the valence charge density and binding energy in a simple metal according to the neutral atom method: the Hartree-Fock ionic potential

    International Nuclear Information System (INIS)

    Dagens, L.

    1975-01-01

    The neutral atom method is generalized in order to deal with a Hartree-Fock nonlocal ionic potential. It is used to test the following metal potential, based upon a theoretical analysis due to Hedin and Lundquist. The true HF potential is used to describe the ionic part and a simple local density scheme (the Gaspar-Kohn-Sham approximation) is used for the valence part. The method is first applied to the calculation of the rigid neutral atom valence density of a few simple metals and the corresponding form factor n(q). The choice of the ionic potential (HF or GKS) is found to have a small but significant effect as far as n(q) is concerned. A comparison with experiment is made for Al and Be, using the available X-rays structure factor measurements. Good agreement is obtained for Al with the recent results of Raccah and Heinrich. No agreement is obtained with the Be results of Brown, although the general behavior of the observed and theoretical n(g) as function of g (reciprocal vector length) are found to be quite similar. The binding energy is calculated for Li, Be, Na, Mg and Al, using the Nozieres-Pines formula for the valence-valence correlation energy. The agreement with observed values is improved considerably when the present (HF+GKS) scheme is used, instead of the HFS completely local density scheme used in a previous work. The remaining discrepancies may be ascribed to the inaccuracy of the NP formula and to the neglect of the whole valence-core correlation energy [fr

  12. Atomic Energy Commission Act, 1963

    International Nuclear Information System (INIS)

    1963-01-01

    Promulgated in 1963, the Atomic Energy Commission Act (204) established and vested in the Ghana Atomic Energy Commission the sole responsibility for all matters relating to the peaceful uses of atomic energy in the country. Embodied in the Act are provisions relating to the powers, duties, rights and liabilities of the Commission. (EAA)

  13. The Atomic energy basic law

    International Nuclear Information System (INIS)

    1979-01-01

    The law aims to secure future energy resources, push forward progress of science and advancement of industry for welfare of the mankind and higher standard of national life by helping research, development and utilization of atomic power. Research, development and utilization of atomic power shall be limited to the peaceful purpose with emphasis laid on safety and carried on independently under democratic administration. Basic concepts and terms are defined, such as: atomic power; nuclear fuel material; nuclear raw material; reactor and radiation. The Atomic Energy Commission and the Atomic Energy Safety Commission shall be set up at the Prime Minister's Office deliberately to realize national policy of research, development and utilization of atomic power and manage democratic administration for atomic energy. The Atomic Energy Commission shall plan, consider and decide matters concerning research, development and utilization of atomic energy. The Atomic Energy Safety Commission shall plan, consider and decide issues particularly concerning safety securing among such matters. The Atomic Energy Research Institute shall be founded under the governmental supervision to perform research, experiment and other necessary affairs for development of atomic energy. The Power Reactor and Nuclear Fuel Development Corporation shall be established likewise to develop fast breeding reactor, advanced thermal reactor and nuclear fuel materials. Development of radioactive minerals, control of nuclear fuel materials and reactors and measures for patent and invention concerning atomic energy, etc. are stipulated respectively. (Okada, K.)

  14. WMO and atomic energy

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1960-09-15

    The growing interest of WMO in atomic energy was reflected in the decision of the Executive Committee in 1956 to establish a panel of experts to study the meteorological aspects of the nuclear energy. One of the major achievements of the panel, which has held two meetings since its inception, has been the preparation of a technical note treating fully the various meteorological problems resulting from the applications of the peaceful uses of atomic energy. Over the past four years, steady progress has also been made both in adapting nuclear techniques to meteorological uses and in providing advice and assistance. Much time and thought are now being devoted to the study of large-scale air mass movements, turbulent diffusion and the other meteorological processes on which the transport and gradual fall-out of radioactive debris depend. The safe location of nuclear plants and the disposal of radioactive waste are related problems in which WMO has also taken a very active interest. Another aspect of the help which WMO as an organization can provide is to help for the collection and analysis of radioactive material in the biosphere. Advances in nuclear physics have also opened up great possibilities for the use of radioactive isotopes in making meteorological and hydrometeorological measurements

  15. Atomic energy and food

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1969-07-01

    International activities aimed at improving, increasing and conserving food supplies are fostered in special ways by the Joint Division of Atomic Energy in Food and Agriculture established by the Agency and the Food and Agriculture Organization of the United Nations. An examination of the processes by which food is produced and of the skills arising from nuclear techniques which are being applied is made here by Maurice Fried and Bjorn Sigurbjornsson. They are the Director and Deputy Director of the Joint Division, which is an integral part of both the Agriculture Department of FAO and of the Agency's Department of Research and Isotopes. (author)

  16. Atomic energy review

    International Nuclear Information System (INIS)

    1971-01-01

    The ATOMIC ENERGY REVIEW (AER), a periodical started in 1963 in accordance with the recommendation made by the Scientific Advisory Committee, is now preparing for its tenth year of publication. The journal appears quarterly (ca 900 pages/year) and occasionally has special issues and supplements. From 1963 to 1971 AER developed into an important international high-standard scientific journal which keeps scientists in Member States informed on progress in various fields of nuclear energy. The Agency's specific role of helping 'developing countries to further their science and education' is reflected in the publication policy of the journal. The subject scope of AER, which was determined at the journal's inception, is very broad. It covers topics in experimental and theoretical physics, nuclear electronics and equipment, physics and technology of reactors and reactor materials and fuels, radio-chemistry, and industrial, medical and other uses of radioisotopes. In other words, almost any subject related to the peaceful application of nuclear energy can qualify for inclusion. Specifically, at any particular time the selection criteria for topics are influenced by the Agency's current programme and interests. AER carries comprehensive review articles, critical state-of-the-art and current awareness surveys, and reports on the important meetings organized or sponsored by the Agency. The following four subsections gradually became necessary to do justice to this variety of material: 'Reviews' proper, 'Current Research and Development', 'Special Item' and 'Conferences and Symposia'. Apart from the conference reports, one hundred and twenty-five reviews, almost all of which were published in English to make them accessible to a wide public, have so far been published

  17. ILO and atomic energy

    International Nuclear Information System (INIS)

    1961-01-01

    The work of the International Labour Organisation in the field of atomic energy has been concerned primarily with the protection of the worker against radiation; in this respect it developed the work carried out before the war on the occupational pathology of roentgen ray operators, radium and radioactive substances and uranium. In view of the extremely serious consequences to society and the individual that would result from a neglect of the essential precautions, the ILO has to adopt international standards setting out the essential precautions that should be observed in a work which may entail a radiation hazard. The 44th International Labour Conference, meeting in the summer of 1960, adopted a convention and recommendation on this subject. The Convention applies to all activities involving exposure of workers to ionizing radiations in the course of their work and provides that each Member of the ILO which ratifies it shall undertake to give effect to it by means of laws or regulations, codes of practice or other appropriate means. It further provides that the necessary steps taken at the national level to ensure effective protection should be progressively brought in line with the provisions of the Convention after its ratification

  18. Low energy atom-atom collisions

    International Nuclear Information System (INIS)

    Child, M.S.

    1980-01-01

    The semiclassical theory of atom-atom potential scattering and of low energy inelastic atom-atom scattering is reviewed. Particular attention is given to the origin and interpretation of rainbow structure, diffraction oscillations and exchange oscillations in the potential scattering differential cross-section, and to the glory structure and symmetry oscillations in the integral cross-section. Available methods for direct inversion of the cross-section data to recover the potential are reviewed in some detail. The theory of non-adiabatic transitions is introduced by a short discussion of interaction mechanisms and of diabetic and adiabatic representations. Analytical S matrix elements are presented for two state curve-crossing (Landau-Zener-Stuckelberg), Demkov and Nikitin models. The relation between Stuckelberg oscillations in the S matrix and in the differential cross-section is discussed in terms of interference between trajectories belonging to two different classical deflection functions. The energy dependences of the inelastic integral cross-section for curve-crossing and Demkov type transitions are also discussed. Finally the theory is reviewed in relation to a recent close-coupled study of fine structure transitions in F( 2 P) + Xe( 2 S) scattering

  19. The atomic energy basic law

    International Nuclear Information System (INIS)

    1977-01-01

    The law establishes clearly the principles that Japan makes R and D, and utilizations of atomic energy only for the peaceful purposes. All the other laws and regulations concerning atomic energy are based on the law. The first chapter lays down the above mentioned objective of the law, and gives definitions of basic concepts and terms, such as atomic energy, nuclear fuel material, nuclear source material, nuclear reactor and radiation. The second chapter provides for the establishment of Atomic Energy Commission which conducts plannings and investigations, and also makes decisions concerning R and D, and utilizations of atomic energy. The third chapter stipulates for establishment of two government organizations which perform R and D of atomic energy developments including experiments and demonstrations of new types of reactors, namely, Atomic Energy Research Institute and Power Reactor and Nuclear Fuel Development Corporation. Chapters from 4th through 8th provide for the regulations on development and acquisition of the minerals containing nuclear source materials, controls on nuclear fuel materials and nuclear reactors, administrations of the patents and inventions concerning atomic energy, and also prevention of injuries due to radiations. The last 9th chapter requires the government and its appointee to compensate the interested third party for damages in relation to the exploitation of nuclear source materials. (Matsushima, A.)

  20. Atomic Energy Authority Act 1954

    International Nuclear Information System (INIS)

    1954-01-01

    This Act provides for the setting up of an Atomic Energy Authority for the United Kingdom. It also makes provision for the Authority's composition, powers, duties, rights and liabilities, and may amend, as a consequence of the establishment of the Authority and in connection therewith, the Atomic Energy Act, 1946, the Radioactive Substances Act 1948 and other relevant enactments. (NEA) [fr

  1. Binding energies of cluster ions

    International Nuclear Information System (INIS)

    Parajuli, R.; Matt, S.; Scheier, P.; Echt, O.; Stamatovic, A.; Maerk, T.D.

    2002-01-01

    The binding energy of charged clusters may be measured by analyzing the kinetic energy released in the metastable decay of mass selected parent ions. Using finite heat bath theory to determine the binding energies of argon, neon, krypton, oxygen and nitrogen from their respective average kinetic energy released were carried out. A high-resolution double focussing two-sector mass spectrometer of reversed Nier-Johnson type geometry was used. MIKE ( mass-analysed ion kinetic energy) were measured to investigate decay reactions of mass-selected ions. For the inert gases neon (Ne n + ), argon (Ar n + ) and krypton (Kr n + ), it is found that the binding energies initially decrease with increasing size n and then level off at a value above the enthalpy of vaporization of the condensed phase. Oxygen cluster ions shown a characteristic dependence on cluster size (U-shape) indicating a change in the metastable fragmentation mechanism when going from the dimer to the decamer ion. (nevyjel)

  2. Climate saver atomic energy?

    International Nuclear Information System (INIS)

    1992-12-01

    According to the Schleswig-Holstein Land government nuclear power phaseout is compatible with measures designed to protect world climate. Only efforts aimed at quickly reducing energy demand by means of thermal insulation, energy conservation techniques, cogeneration systems and application of renewable energies are necessary. The Schleswig-Holstein energy concept is given as an example of making possible a worldwide carbon dioxide reduction. (DG) [de

  3. The role of extra-atomic relaxation in determining Si2p binding energy shifts at silicon/silicon oxide interfaces

    International Nuclear Information System (INIS)

    Zhang, K.Z.; Greeley, J.N.; Banaszak Holl, M.M.; McFeely, F.R.

    1997-01-01

    The observed binding energy shift for silicon oxide films grown on crystalline silicon varies as a function of film thickness. The physical basis of this shift has previously been ascribed to a variety of initial state effects (Si endash O ring size, strain, stoichiometry, and crystallinity), final state effects (a variety of screening mechanisms), and extrinsic effects (charging). By constructing a structurally homogeneous silicon oxide film on silicon, initial state effects have been minimized and the magnitude of final state stabilization as a function of film thickness has been directly measured. In addition, questions regarding the charging of thin silicon oxide films on silicon have been addressed. From these studies, it is concluded that initial state effects play a negligible role in the thickness-dependent binding energy shift. For the first ∼30 Angstrom of oxide film, the thickness-dependent binding energy shift can be attributed to final state effects in the form of image charge induced stabilization. Beyond about 30 Angstrom, charging of the film occurs. copyright 1997 American Institute of Physics

  4. Institute for Atomic Energy

    International Nuclear Information System (INIS)

    1980-01-01

    The Institute has in 1980 changed its name to 'Institutt for Energiteknikk' and this reflects a de facto change in programme emphasis in which a large part of the activity in 1979 was in energy systems analysis, energy technology and conservation, petroleum technology,etc. However previous projects in environmental and safety aspects of nuclear power, risk analysis and fundamental physics using neutron beams, have continued. Nuclear technology is now concentrated in the Halden Reactor Project, whose work is outlined. Isotope production based on the JEEP II reactor and irradiation there and in the Co-60 plant, and isotope applications in environmental and resource investigations continue as previously. Waste processing and safeguards are also carried out as national responsibilities. (JIW)

  5. A coupled channel study on a binding mechanism of positronic alkali atoms

    International Nuclear Information System (INIS)

    Kubota, Yoshihiro; Kino, Yasushi

    2008-01-01

    In order to investigate the binding mechanism of weakly bound states of positronic alkali atoms, we calculate the energies and wavefunctions using the Gaussian expansion method (GEM) where a positronium (Ps)-alkali ion channel and a positron-alkali atom channel are explicitly introduced. The energies of the bound states are updated using a model potential that reproduces well the observed energy levels of alkali atoms. The binding mechanism of the positronic alkali atom is analyzed by the wavefunctions obtained. The structure of the positronic alkali atom has been regarded as a Ps cluster orbiting the alkali ion, which is described by the Ps-alkali ion channel. We point out that the fraction having the positron-alkali atom configuration is small but plays an indispensable role for the weakly bound system

  6. Skyrmions with low binding energies

    Energy Technology Data Exchange (ETDEWEB)

    Gillard, Mike, E-mail: m.n.gillard@leeds.ac.uk; Harland, Derek, E-mail: d.g.harland@leeds.ac.uk; Speight, Martin, E-mail: speight@maths.leeds.ac.uk

    2015-06-15

    Nuclear binding energies are investigated in two variants of the Skyrme model: the first replaces the usual Skyrme term with a term that is sixth order in derivatives, and the second includes a potential that is quartic in the pion fields. Solitons in the first model are shown to deviate significantly from ansätze previously assumed in the literature. The binding energies obtained in both models are lower than those obtained from the standard Skyrme model, and those obtained in the second model are close to the experimental values.

  7. Skyrmions with low binding energies

    International Nuclear Information System (INIS)

    Gillard, Mike; Harland, Derek; Speight, Martin

    2015-01-01

    Nuclear binding energies are investigated in two variants of the Skyrme model: the first replaces the usual Skyrme term with a term that is sixth order in derivatives, and the second includes a potential that is quartic in the pion fields. Solitons in the first model are shown to deviate significantly from ansätze previously assumed in the literature. The binding energies obtained in both models are lower than those obtained from the standard Skyrme model, and those obtained in the second model are close to the experimental values

  8. Skyrmions with low binding energies

    Directory of Open Access Journals (Sweden)

    Mike Gillard

    2015-06-01

    Full Text Available Nuclear binding energies are investigated in two variants of the Skyrme model: the first replaces the usual Skyrme term with a term that is sixth order in derivatives, and the second includes a potential that is quartic in the pion fields. Solitons in the first model are shown to deviate significantly from ansätze previously assumed in the literature. The binding energies obtained in both models are lower than those obtained from the standard Skyrme model, and those obtained in the second model are close to the experimental values.

  9. The RPA Atomization Energy Puzzle.

    Science.gov (United States)

    Ruzsinszky, Adrienn; Perdew, John P; Csonka, Gábor I

    2010-01-12

    There is current interest in the random phase approximation (RPA), a "fifth-rung" density functional for the exchange-correlation energy. RPA has full exact exchange and constructs the correlation with the help of the unoccupied Kohn-Sham orbitals. In many cases (uniform electron gas, jellium surface, and free atom), the correction to RPA is a short-ranged effect that is captured by a local spin density approximation (LSDA) or a generalized gradient approximation (GGA). Nonempirical density functionals for the correction to RPA were constructed earlier at the LSDA and GGA levels (RPA+), but they are constructed here at the fully nonlocal level (RPA++), using the van der Waals density functional (vdW-DF) of Langreth, Lundqvist, and collaborators. While they make important and helpful corrections to RPA total and ionization energies of free atoms, they correct the RPA atomization energies of molecules by only about 1 kcal/mol. Thus, it is puzzling that RPA atomization energies are, on average, about 10 kcal/mol lower than those of accurate values from experiment. We find here that a hybrid of 50% Perdew-Burke-Ernzerhof GGA with 50% RPA+ yields atomization energies much more accurate than either one does alone. This suggests a solution to the puzzle: While the proper correction to RPA is short-ranged in some systems, its contribution to the correlation hole can spread out in a molecule with multiple atomic centers, canceling part of the spread of the exact exchange hole (more so than in RPA or RPA+), making the true exchange-correlation hole more localized than in RPA or RPA+. This effect is not captured even by the vdW-DF nonlocality, but it requires the different kind of full nonlocality present in a hybrid functional.

  10. Advanced technologies and atomic energy

    International Nuclear Information System (INIS)

    1995-01-01

    The expert committee on the research 'Application of advanced technologies to nuclear power' started the activities in fiscal year 1994 as one of the expert research committees of Atomic Energy Society of Japan. The objective of its foundation is to investigate the information on the advanced technologies related to atomic energy and to promote their practice. In this fiscal year, the advanced technologies in the fields of system and safety, materials and measurement were taken up. The second committee meeting was held in March, 1995. In this report, the contents of the lectures at the committee meeting and the symposium are compiled. The topics in the symposium were the meaning of advanced technologies, the advanced technologies and atomic energy, human factors and control and safety systems, robot technology and microtechnology, and functionally gradient materials. Lectures were given at two committee meetings on the development of atomic energy that has come to the turning point, the development of advanced technologies centering around ULSI, the present problems of structural fine ceramics and countermeasures of JFCC, the material analysis using laser plasma soft X-ray, and the fullerene research of advanced technology development in Power Reactor and Nuclear Fuel Development Corporation. (K.I.)

  11. The Atomic Energy Control Board

    International Nuclear Information System (INIS)

    Shultz, R.J.

    1980-01-01

    Certain aspects of the Atomic Energy Control Board's relationships with Cabinet, the Minister, Government officials, The licensees and the public are analyzed. The way some of the relationships would have been modified by the Nuclear Control and Administration Act proposed in 1977 is examined. (L.L.)

  12. Experimental electron binding energies for thulium in different matrices

    Czech Academy of Sciences Publication Activity Database

    Inoyatov, A. K.; Kovalík, Alojz; Filosofov, D. V.; Ryšavý, Miloš; Perevoshchikov, L. L.; Yushkevich, Yu. V.; Zbořil, M.

    2015-01-01

    Roč. 202, JUL (2015), s. 46-55 ISSN 0368-2048 R&D Projects: GA MŠk LG14004; GA ČR(CZ) GAP203/12/1896 Institutional support: RVO:61389005 Keywords : Tm-169 * (169)yb * atomic environment * electron binding energy * chemical shift * natural atomic level width Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 1.561, year: 2015

  13. Atomic energy laws in Germany

    International Nuclear Information System (INIS)

    Lukes, R.H.P.

    1980-01-01

    The regulations of German atomic energy laws are based in large on the fundamental law of the Federal Republic of Germany-the constitution. Atomgesetz of 1959, as amended on October 31, 1976, constitutes the core of atomic energy laws (Atomrecht), and is supplemented by orders (Verordnungen). The Federal Republic has the right to legislate Atomrecht, and the enforcement of such laws and orders is entrusted to each province. The peaceful uses of radioactive materials are stipulated by Atomgesetz and orders. Atomgesetz seeks two objects, first it is to enable the handling of radioactive substances for the acquisition of energy, medical treatment, food treatment and the harmless examination of things by radioactive materials, and secondly to ensure the protection from danger in the handling of such materials. The control of radioactive materials by the state including imports and exports, storage and possession, disposal and processing, etc., is established by the law to secure the protection from danger of atomic energy. The particular indemnification responsibility for the harm due to radiation is defined in Atomgesetz, and only the owners (Inhaber) of atomic energy facilities are liable for damage. The violation of the regulations on the transaction of radioactive materials is punished by fines up to 100,000 German marks of imprisonment of less than five years. Orders are established on roentgen ray, the protection from radiation, the treatment of foods by electron beam, gamma ray, roentgen ray or ultraviolet ray and the permission of medicines. The regulations of the EURATOM treaty have legality as Atomrecht. (Okada, K.)

  14. Atomic Energy (factories) rules: 1988

    International Nuclear Information System (INIS)

    1988-01-01

    These rules are made by the Central Government under the Factories Act, 1948 and extend to all factories engaged in carrying out the purposes of the Atomic Energy Act, 1962. The rules cover the requirements of inspecting staff, health aspects, personnel safety, personnel welfare, working hours, employment of young persons, special provisions in case of dangerous manufacturing processes or operations, supplemental rules for administrative aspects and special powers of competent authority. (M.G.B.)

  15. Atomic Energy Commission Act, 2000 (Act 588)

    International Nuclear Information System (INIS)

    2000-01-01

    Act 588 of the Republic of Ghana entitled, Atomic Energy Commission Act, 2000, amends and consolidates the Atomic Energy Commission Act, 204 of 1963 relating to the establishment of the Atomic Energy Commission. Act 588 makes provision for the Ghana Atomic Energy Commission to establish more institutes for the purpose of research in furtherance of its functions and also promote the commercialization of its research and development results. (E.A.A.)

  16. Atomic Energy Commission (Amendment) Law, 1993

    International Nuclear Information System (INIS)

    1993-02-01

    The Atomic Energy Commission (Amendment) Law, 1993 (P.N.D.C.L. 308) seeks to amend the Atomic Energy Commission Act of 1963 (Act 204) so as to provide for the establishment of a Radiation Protection Board and other institutes under the Ghana Atomic Energy Commission. The Law further repeats the Atomic Energy Commission (Amendment) Law of 1982 (P.N.D.C.L. 37). (EAA)

  17. Atomic Energy Authority Bill (Lords)

    Energy Technology Data Exchange (ETDEWEB)

    Eadie, A.; Goodlad, A.; Fisher, M.; Griffiths, P.; Coombs, S.

    1986-01-30

    The discussions of one of the standing committees of the House of Lords on the Atomic Energy Authority Bill are reported verbatim. Clauses 6, 9 and new clauses 3, 2 and 4 were discussed. The amendments to the clauses were put and debated. The safety requirements of the nuclear industry and the money necessary for these are discussed. At the end of the debate on each clause (and amendments if any), the decision of the House as to its agreement or otherwise is recorded. It was agreed that the Bill, as amended by the committee, should be reported to the (full) House of Lords. The debate lasted 1 3/4 hours.

  18. Atomic Energy Research benchmark activity

    International Nuclear Information System (INIS)

    Makai, M.

    1998-01-01

    The test problems utilized in the validation and verification process of computer programs in Atomic Energie Research are collected into one bunch. This is the first step towards issuing a volume in which tests for VVER are collected, along with reference solutions and a number of solutions. The benchmarks do not include the ZR-6 experiments because they have been published along with a number of comparisons in the Final reports of TIC. The present collection focuses on operational and mathematical benchmarks which cover almost the entire range of reaktor calculation. (Author)

  19. Atomic Energy Authority Act 1971

    International Nuclear Information System (INIS)

    1971-01-01

    This Act provides for the transfer of property, rights, liabilities and obligations of parts of the undertaking of the United Kingdom Atomic Energy Autority, to two new Compagnies set up for this purpose: the Bristish Nuclear Fuels Limited, and the Radiochemical Centre Limited. Patents licences and registered designs owned by the Autority at the time of the transfer are not included therein. The Act also includes amendments to the Nuclear Installations Act 1965, notably as regards permits to operate granted to a body corporate. Finally, the Schedule to this Act lays down a certain number of provisions relating to security and the preservation of secrets. (NEA) [fr

  20. The State and atomic energy

    International Nuclear Information System (INIS)

    Jungk, R.

    1991-01-01

    Illustrous, eloquent, and yet easy to read for the interested layman, the book begins with alleged deplorable conditions at the reprocessing centra La Hague, portrays, amongst other things, the spying on and supervision of persons in the nuclear field and in research, the misuse of fissile material, and threats and blackmail as a consequence thereof, human error as a cause of accidents, and it concludes with a nonviolent new International against the state and atomic energy, against technological tyranny. Titles of chapters: The hard road; radiation feed; the gamblers; homo atomicus; the intimidated; the ''proliferators''; nuclear terrorists; those supervised; the smooth road. It remains an open question whether the book contributes to defusing the nuclear controversy - in the book almost an ideology - and to bringing the two sides closer together. (HP) [de

  1. Design of atomic energy information network system

    International Nuclear Information System (INIS)

    Kim, Y. T.; Lee, E. J.; Han, K. W.; Lee, H. C.; Chang, J. H.

    2004-01-01

    As the 21 st century is expected to induce a Knowledge based society, responding to this kind of change on our own initiative could be achieved by establishing networks among atomic energy agencies with the Atomic Energy Portal Site in a pivotal role. Thus, enabling the knowledge information from each agency to be easily shared and utilized. Furthermore, it can contribute to further researches by providing accumulated knowledge in the atomic energy, such as research output and past achievements, and by avoiding the repetition of researches on the same subjects. It could also provide remote educational data to researchers and industrial experts in atomic energy, as well as atomic energy information for general public consistently, so that we can promote our confidence in atomic energy

  2. Co-Occurring Atomic Contacts for the Characterization of Protein Binding Hot Spots

    Science.gov (United States)

    Liu, Qian; Ren, Jing; Song, Jiangning; Li, Jinyan

    2015-01-01

    A binding hot spot is a small area at a protein-protein interface that can make significant contribution to binding free energy. This work investigates the substantial contribution made by some special co-occurring atomic contacts at a binding hot spot. A co-occurring atomic contact is a pair of atomic contacts that are close to each other with no more than three covalent-bond steps. We found that two kinds of co-occurring atomic contacts can play an important part in the accurate prediction of binding hot spot residues. One is the co-occurrence of two nearby hydrogen bonds. For example, mutations of any residue in a hydrogen bond network consisting of multiple co-occurring hydrogen bonds could disrupt the interaction considerably. The other kind of co-occurring atomic contact is the co-occurrence of a hydrophobic carbon contact and a contact between a hydrophobic carbon atom and a π ring. In fact, this co-occurrence signifies the collective effect of hydrophobic contacts. We also found that the B-factor measurements of several specific groups of amino acids are useful for the prediction of hot spots. Taking the B-factor, individual atomic contacts and the co-occurring contacts as features, we developed a new prediction method and thoroughly assessed its performance via cross-validation and independent dataset test. The results show that our method achieves higher prediction performance than well-known methods such as Robetta, FoldX and Hotpoint. We conclude that these contact descriptors, in particular the novel co-occurring atomic contacts, can be used to facilitate accurate and interpretable characterization of protein binding hot spots. PMID:26675422

  3. Atomic Energy (Miscellaneous Provisions) Act 1981

    International Nuclear Information System (INIS)

    1981-01-01

    This Act extends the power of the United Kingdom Atomic Energy Authority to dispose of shares held by it in any company, and the power of the Secretary of State for Energy to dispose of shares held by him in companies engaged in activities in the field of atomic energy or radioactive substances. (NEA) [fr

  4. Binding energy effects in cascade evolution and sputtering

    International Nuclear Information System (INIS)

    Robinson, M.T.

    1995-06-01

    The MARLOWE model was extended to include a binding energy dependent on the local crystalline order, so that atoms are bound less strongly to their lattice sites near surfaces or associated damage. Sputtering and cascade evolution were studied on the examples of self-ion irradiations of Cu and Au monocrystals. In cascades, the mean binding energy is reduced ∼8% in Cu with little dependence on the initial recoil energy; in Au, it is reduced ∼9% at 1 keV and ∼15% at 100 keV. In sputtering, the mean binding energy is reduced ∼8% in Cu and ∼15% in Au with little energy dependence; the yields are increased about half as much. Most sites from which sputtered atoms originate are isolated in both metals. Small clusters of such sites occur in Cu, but there are some large clusters in Au, especially in [111] targets. There are always more large clusters with damage-dependent binding than with a constant binding energy, but only a few clusters are compact enough to be regarded as pits

  5. Atom probe tomography simulations and density functional theory calculations of bonding energies in Cu3Au

    KAUST Repository

    Boll, Torben; Zhu, Zhiyong; Al-Kassab, Talaat; Schwingenschlö gl, Udo

    2012-01-01

    In this article the Cu-Au binding energy in Cu3Au is determined by comparing experimental atom probe tomography (APT) results to simulations. The resulting bonding energy is supported by density functional theory calculations. The APT simulations

  6. Energy levels of muonic atoms

    International Nuclear Information System (INIS)

    Borie, E.; Rinker, G.A.

    1982-01-01

    The theory of muonic atoms is a complex and highly developed combination of nuclear physics, atomic physics, and quantum electrodynamics. Perhaps nowhere else in microscopic physics are such diverse branches so intimately intertwined and yet readily available for precise experimental verification or rejection. In the present review we summarize and discuss all of the most important components of muonic atom theory, and show in selected cases how this theory meets experimental measurements

  7. Atomic energy in Latin America

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1967-06-15

    Most countries in Latin America, including all those on the mainland, are Members of the Agency. Interest in the possibilities of nuclear energy has led to considerable activity, much of it in direct collaboration with the IAEA. Member States in the region are: Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Paraguay, Peru, Uruguay, Venezuela. Of these, Argentina, Brazil, Colombia and Venezuela are operating, and Mexico and Uruguay are constructing, research reactors, while Chile and Peru are studying proposals. Argentina, Brazil, Mexico and Uruguay have all agreed to accept Agency safeguards for reactors. The possibility of future needs for nuclear power is under examination by several countries, in some cases being related to desalination of water. All atomic work in Latin America is devoted to peaceful uses, and note-worthy progress has been made with proposals for a treaty which would make the whole region a militarily de-nuclearized zone. It is proposed that when this comes into effect the Agency will be asked to apply the controls developed in its safeguards system, and to carry out the inspections necessary to establish that work in progress is solely for peaceful purposes

  8. Atomic energy in Latin America

    International Nuclear Information System (INIS)

    1967-01-01

    Most countries in Latin America, including all those on the mainland, are Members of the Agency. Interest in the possibilities of nuclear energy has led to considerable activity, much of it in direct collaboration with the IAEA. Member States in the region are: Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Paraguay, Peru, Uruguay, Venezuela. Of these, Argentina, Brazil, Colombia and Venezuela are operating, and Mexico and Uruguay are constructing, research reactors, while Chile and Peru are studying proposals. Argentina, Brazil, Mexico and Uruguay have all agreed to accept Agency safeguards for reactors. The possibility of future needs for nuclear power is under examination by several countries, in some cases being related to desalination of water. All atomic work in Latin America is devoted to peaceful uses, and note-worthy progress has been made with proposals for a treaty which would make the whole region a militarily de-nuclearized zone. It is proposed that when this comes into effect the Agency will be asked to apply the controls developed in its safeguards system, and to carry out the inspections necessary to establish that work in progress is solely for peaceful purposes

  9. Atomic energy indemnification system in Japan

    International Nuclear Information System (INIS)

    Hoshino, Eiichi

    1980-01-01

    The Japanese legislation on the indemnification by atomic energy enterprisers for atomic energy damages, published in 1961 and enforced in 1962, includes the law concerning indemnification for atomic energy damages and the law concerning atomic energy damage indemnification contracts (hereafter referred to as ''the law concerning indemnification contracts''). While the Japanese laws are same as the foreign legislation in the provisions of the responsibility of atomic energy damages without the error of atomic energy enterprisers, exemption reasons are more important in this respect. When damages are due to exceptionally grave natural disasters or social disturbances, atomic energy enterprisers are exempted from the responsibility. Indemnification amounts are determined, but the Japanese laws do not limit then, different from the foreign regulations. The periods for demanding indemnification are not defined particularly in the law concerning indemnification contracts, and the general basic rules of the civil law are applied. As a result, the demand right terminates in 3 years after the injured persons find damage and offenders, and in 20 years since the unlawful act (Article 724, Civil law). The indemnification liability for atomic energy damages is focused on atomic energy enterprisers concerned in the same way as the foreign laws. The measures for assuring the execution of indemnification responsibility consist in principle of the firm conbination of the liability insurance contracts with private insurance companies and the indemnification contracts for atomic energy damages with the state. The damages of employes suffered in works are excluded from indemnification, which has been the main issue of discussion since the enactment of atomic energy laws. (Okada, K.)

  10. International Atomic Energy Agency and Malaysia

    International Nuclear Information System (INIS)

    Abd Rahim Mohd Nor

    1985-01-01

    A review on IAEA (International Atomic Energy Agency) and its relation with Malaysia is given. This article also discusses the background history of IAEA, its organization and functions in the field of nuclear energy

  11. Atomic Energy Authority (Weapons Group) Act 1973

    International Nuclear Information System (INIS)

    1973-01-01

    This Act, which came into force on 6th March 1973 and modified Section 2 of the Atomic Energy Authority Act 1954 in respect of the Authority's power to do work on explosive nuclear devices, made provision for the transfer to the Secretary of State for Defence of the Weapons Group of the Atomic Energy Authority. (NEA) [fr

  12. Atomic Energy Law with ordinances. 9. ed.

    International Nuclear Information System (INIS)

    Anon.

    1982-01-01

    The revised edition of the text is due to a variety of major changes in, and amendments to, the German Atomic Energy Law. This book includes the current version of the Atomic Energy Law which has been changed several times, the 1982-version of the ordinace concerning procedures laid down in the Atomic Energy Law, the 1976 radiation protection ordinance together with recent amendments, the 1973 X-ray ordinance, the 1977 financial security ordinance laid down in the Atomic Energy Law, the 1981 ordinance concerning costs, the ordinance concerning performance in anticipation of ultimate disposal. The book is a compilation of the basic Atomic Energy Law which is needed mostly for imminent practical requirements. (orig./HSCH) [de

  13. Atomic Energy Act 1953-1966

    International Nuclear Information System (INIS)

    1970-01-01

    The Atomic Energy Act 1953-1966 establishes the Australian Atomic Energy Commission and lays down its powers, duties, rules of procedure and financing. The members of the Commission are appointed by the Governor-General. It is responsible, inter alia, for all activities covering uranium research, mining and trading as well as for atomic energy development and nuclear plant construction and operation. Its duties also include training of scientific research workers and collection and dissemination of information on atomic energy. For purposes of security, the Act further-more prescribes sanctions in relation to unauthorised acquisition or communication of information on this subject. Finally, the Act repeals the Atomic Energy (Control of Materials) Act 1946 and 1952. (NEA) [fr

  14. P-shell hyperon binding energies

    International Nuclear Information System (INIS)

    Koetsier, D.; Amos, K.

    1991-01-01

    A shell model for lambda hypernuclei has been used to determine the binding energy of the hyperon in nuclei throughout the p shell. Conventional (Cohen and Kurath) potential energies for nucleon-nucleon interactions were used with hyperon-nucleon interactions taken from Nijmegen one boson exchange potentials. The hyperon binding energies calculated from these potentials compare well with measured values. 7 refs., 2 figs

  15. Atomic energy levels and Grotrian diagrams

    CERN Document Server

    Bashkin, Stanley

    1975-01-01

    Atomic Energy Levels and Grotrian Diagrams, Volume I: Hydrogen I - Phosphorus XV presents diagrams of various elements that show their energy level and electronic transitions. The book covers the first 15 elements according to their atomic number. The text will be of great use to researchers and practitioners of fields such as astrophysics that requires pictorial representation of the energy levels and electronic transitions of elements.

  16. Intergovernmental organisation activities: European Atomic Energy Community, International Atomic Energy Agency, OECD Nuclear Energy Agency

    International Nuclear Information System (INIS)

    Anon.

    2012-01-01

    European Atomic Energy Community: Proposed legislative instruments, Adopted legislative instruments, Non-legislative instruments, Other activities (meetings). International Atomic Energy Agency: IAEA Action Plan on Nuclear Safety. OECD Nuclear Energy Agency: The Russian Federation to join the OECD Nuclear Energy Agency; Participation by the regulatory authorities of India and the United Arab Emirates in the Multinational Design Evaluation Programme (MDEP); NEA International Workshop on Crisis Communication, 9-10 May 2012; International School of Nuclear Law: 2013; Next NEA International Nuclear Law Essentials Course

  17. Integrating water exclusion theory into βcontacts to predict binding free energy changes and binding hot spots

    Science.gov (United States)

    2014-01-01

    Background Binding free energy and binding hot spots at protein-protein interfaces are two important research areas for understanding protein interactions. Computational methods have been developed previously for accurate prediction of binding free energy change upon mutation for interfacial residues. However, a large number of interrupted and unimportant atomic contacts are used in the training phase which caused accuracy loss. Results This work proposes a new method, βACV ASA , to predict the change of binding free energy after alanine mutations. βACV ASA integrates accessible surface area (ASA) and our newly defined β contacts together into an atomic contact vector (ACV). A β contact between two atoms is a direct contact without being interrupted by any other atom between them. A β contact’s potential contribution to protein binding is also supposed to be inversely proportional to its ASA to follow the water exclusion hypothesis of binding hot spots. Tested on a dataset of 396 alanine mutations, our method is found to be superior in classification performance to many other methods, including Robetta, FoldX, HotPOINT, an ACV method of β contacts without ASA integration, and ACV ASA methods (similar to βACV ASA but based on distance-cutoff contacts). Based on our data analysis and results, we can draw conclusions that: (i) our method is powerful in the prediction of binding free energy change after alanine mutation; (ii) β contacts are better than distance-cutoff contacts for modeling the well-organized protein-binding interfaces; (iii) β contacts usually are only a small fraction number of the distance-based contacts; and (iv) water exclusion is a necessary condition for a residue to become a binding hot spot. Conclusions βACV ASA is designed using the advantages of both β contacts and water exclusion. It is an excellent tool to predict binding free energy changes and binding hot spots after alanine mutation. PMID:24568581

  18. A History of the Atomic Energy Commission

    Science.gov (United States)

    Buck, Alice L.

    1983-07-01

    This pamphlet traces the history of the US Atomic Energy Commission's twenty-eight year stewardship of the Nation's nuclear energy program, from the signing of the Atomic Energy Act on August 1, 1946 to the signing of the Energy Reorganization Act on October 11, 1974. The Commission's early concentration on the military atom produced sophisticated nuclear weapons for the Nation's defense and made possible the creation of a fleet of nuclear submarines and surface ships. Extensive research in the nuclear sciences resulted in the widespread application of nuclear technology for scientific, medical and industrial purposes, while the passage of the Atomic Energy Act of 1954 made possible the development of a nuclear industry, and enabled the United States to share the new technology with other nations.

  19. History of the Atomic Energy Commission

    International Nuclear Information System (INIS)

    Buck, A.L.

    1983-07-01

    This pamphlet traces the history of the US Atomic Energy Commission's twenty-eight year stewardship of the Nation's nuclear energy program, from the signing of the Atomic Energy Act on August 1, 1946 to the signing of the Energy Reorganization Act on October 11, 1974. The Commission's early concentration on the military atom produced sophisticated nuclear weapons for the Nation's defense and made possible the creation of a fleet of nuclear submarines and surface ships. Extensive research in the nuclear sciences resulted in the widespread application of nuclear technology for scientific, medical and industrial purposes, while the passage of the Atomic Energy Act of 1954 made possible the development of a nuclear industry, and enabled the United States to share the new technology with other nations

  20. History of the Atomic Energy Commission

    International Nuclear Information System (INIS)

    Buck, A.L.

    1982-08-01

    This pamphlet traces the history of the Atomic Energy Commission's twenty-eight year stewardship of the Nation's nuclear energy program, from the signing of the Atomic Energy Act on August 1, 1946, to the signing of the Energy Reorganization Act on October 11, 1974. The Commission's early concentration on the military atom produced sophisticated nuclear weapons for the Nation's defense and made possible the creation of a fleet of nuclear submarines and surface ships. Extensive research in the nuclear sciences resulted in the widespread application of nuclear technology for scientific, medical and industrial purposes, while the passage of the Atomic Energy Act of 1954 made possible the development of a nuclear industry, and enabled the United States to share the new technology with other nations

  1. Atomic Energy Amendment Act 1978, No. 31

    International Nuclear Information System (INIS)

    1978-01-01

    This Act amends certain Sections of the Atomic Energy Act 1953. The principal modifications concern the definitions of atomic energy, prescribed substances, the provision and supply of uranium in relation to the functions of the Atomic Energy Commission, compliance with the agreement with the IAEA on the application of safeguards under the Non-Proliferation Treaty as well as with any agreement with any other international organization or another country. The Act also amends the 1953 Act in respect of the control of prescribed substances and repeals the section concerning jurisdiction of courts. (NEA) [fr

  2. Transfer of energy in an atom

    International Nuclear Information System (INIS)

    Chemin, J.F.

    2001-01-01

    In most cases the nucleus does not interact with the electron cloud because its energy range is far higher, but in some rare cases electrons from the electron cloud and the nucleus may exchange energy: an electron may de-excite by transferring a part of its energy to the nucleus that becomes itself excited (nuclear excitation by electronic transfer or NEET), conversely electrons can receive energy from the nucleus (bound internal conversion or BIC). For the first time both energy transfers have been observed: a BIC process on a tellurium-125 atom by a French team and a NEET process on a gold-197 atom by a Japanese team. (A.C.)

  3. Exciton Binding Energy of Monolayer WS2

    Science.gov (United States)

    Zhu, Bairen; Chen, Xi; Cui, Xiaodong

    2015-03-01

    The optical properties of monolayer transition metal dichalcogenides (TMDC) feature prominent excitonic natures. Here we report an experimental approach to measuring the exciton binding energy of monolayer WS2 with linear differential transmission spectroscopy and two-photon photoluminescence excitation spectroscopy (TP-PLE). TP-PLE measurements show the exciton binding energy of 0.71 +/- 0.01 eV around K valley in the Brillouin zone.

  4. Establishment of the Japan Atomic Energy Agency

    International Nuclear Information System (INIS)

    Okazaki, Toshio

    2006-01-01

    A goal of the 21. century is for society to pursue 'sustainable economic development and prosperous life by recycling resources', thus rejecting 'development based on the waste of resources'. For Japan, which has limited energy resources, it is important to secure safe, inexpensive, environmentally friendly energy resources having long-term availability. To contribute to long-term energy security and solve global environmental issues, and to create advanced competitive science and technology, the Japan Atomic Energy Agency (JAEA) was established by integrating the Japan Atomic Energy Research Institute (JAERI) and the Japan Nuclear Cycle Development Institute (JNC) in October 2005. JAEA is endeavoring to establish nuclear fuel cycles, to contribute to social improvement through hydrogen production initiated by atomic energy, and to pursue research and development of thermonuclear fusion and quantum beam technology. This paper reviews the main R and D activities of JAEA. The structure of the paper is the following: 1. Introduction; 2. Japan Atomic Energy Agency; 3. Efforts to Commercialize the Fast Reactor Cycle; 4. Monju Progress; 5. Geological Disposal of High-Level Radioactive Waste R and D; 6. High Temperature Gas-Cooled Reactor System R and D; 7. Fusion Research and Development; 8. LWR Spent Fuel Reprocessing Technology; 9. Quantum Beam Technologies; 10. Nuclear Safety Research and Regulatory Applications; 11. Basic Science and Engineering Research; 12. Contribution to the Enhanced International Nonproliferation Regimes; 13. Conclusions. To summarize, JAEA will promote the above R and D activities, addressing the following commitments: - On problems that atomic energy faces, we shall extend technical assistance in response to the government and the industrial sectors. - We shall produce technical options to attain political goals to secure medium to long-term stable energy supplies and to solve global environmental issues. - With the high potentials of atomic

  5. Why? The nuclear and atomic energy

    International Nuclear Information System (INIS)

    Lee, Kwangwoong

    2009-01-01

    This book is a science comic book for students in elementary school, which contains energy and life such as our body and energy, animal and energy, plant and energy, kinetic energy, potential energy and the principle of the conservation of energy in the first part. The second part explains fossil fuel like coal, petroleum and natural gas. Next it deals with electric power, nuclear energy such as atom and molecule, nuclear fusion and energy for future like solar cell and black hole power plant.

  6. Why? The nuclear and atomic energy

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Kwangwoong

    2009-01-15

    This book is a science comic book for students in elementary school, which contains energy and life such as our body and energy, animal and energy, plant and energy, kinetic energy, potential energy and the principle of the conservation of energy in the first part. The second part explains fossil fuel like coal, petroleum and natural gas. Next it deals with electric power, nuclear energy such as atom and molecule, nuclear fusion and energy for future like solar cell and black hole power plant.

  7. Atomic energy control board. History backgrounder

    International Nuclear Information System (INIS)

    1986-10-01

    The Atomic Energy Control Board (AECB) is a regulatory agency set up by the Government of Canada under the Atomic Energy Control Act of 1946 to assist the Government in its efforts to make provision for the control and supervision of the development, application and use of atomic energy and to enable Canada to participate effectively in measures of international control of atomic energy. It is also responsible for the administration of the Nuclear Liability Act, including the designation of nuclear installations and the prescription of basic insurance to be carried by the operators of such nuclear installations. An overview is presented of the AECB's evolution in chronological form, its major current activities, and some of the challenges expected in the next decade

  8. White paper on atomic energy in 2005

    International Nuclear Information System (INIS)

    2006-03-01

    Since the publication of its last White Paper on Atomic Energy in 2004, the Atomic Energy Commission of Japan (AEC) summarized trends covering all aspects of nuclear energy over the period up to December 2005. This paper is comprised of a main document and supplementary materials. In the first chapter of the main document, the first section summarized the changes on research, development and utilization of nuclear energy in 50 years from establishment of the Atomic Energy Basic Law. The second section summarized that nuclear energy utilization (energy utilization and radiation utilization) for contributing to the welfare of humanity and the improvement of the standard of living of the people, and the appropriate direction in the future and the recognitions to become its background of nuclear policies that indicated in 'Framework for Nuclear Energy Policy' (AEC decided at October 2005), concerning fundamental activities, R and D activities and international activities that essential for the realization of nuclear energy utilization. The second chapter summarized recent trends of national and private activities on research, development and utilization of nuclear energy, covering the topics 'Nuclear Energy Policy in Japan', 'Strengthening Fundamental Activities on Research, Development and Utilization of Nuclear Energy', 'Steady Promotion of Nuclear Energy Utilization', Promotion of Nuclear Energy Research and Development', Promotion of International Activity', 'Various Evaluation on Research, Development and Utilization of Nuclear Energy'. The supplementary materials include lists of AEC decisions, nuclear energy budgets, year-by-year data tables, and other such similar materials. (J.P.N.)

  9. Atomic energy today: An urgent dilemma

    International Nuclear Information System (INIS)

    Coronado, G.

    1997-01-01

    This article compiles the trajectory of the nuclear energy, in different countries of the world, since 1939. It also makes reference to the nuclear accidents that have happened in the past. It contains information of other applications of the nuclear energy, such as: the atomic industry of energetic production and alternatives to the nuclear energy [es

  10. Electricity supply without atomic energy

    International Nuclear Information System (INIS)

    Birnbaum, U.; Duering, K.; Moenig, W.; Mueller, M.; Pohlmann, M.; Wagner, H.J.

    1985-01-01

    Alongside their bill for the immediate closure of all atomic power stations in the F.R.G. (Drs. 10/1913 of the German Bundestag), the parliamentary Greens handed over a study, presented in October 1984, to the F- and T-Committee of the Bundestag for debate. This paper analyses the hypotheses and statements of these discussions. A summary is attached in the appendix. (orig.) [de

  11. The Future of Atomic Energy

    Science.gov (United States)

    Fermi, E.

    1946-05-27

    There is definitely a technical possibility that atomic power may gradually develop into one of the principal sources of useful power. If this expectation will prove correct, great advantages can be expected to come from the fact that the weight of the fuel is almost negligible. This feature may be particularly valuable for making power available to regions of difficult access and far from deposits of coal. It also may prove a great asset in mobile power units for example in a power plant for ship propulsion. On the negative side there are some technical limitations to be applicability of atomic power of which perhaps the most serious is the impossibility of constructing light power units; also there will be some peculiar difficulties in operating atomic plants, as for example the necessity of handling highly radioactive substances which will necessitate, at least for some considerable period, the use of specially skilled personnel for the operation. But the chief obstacle in the way of developing atomic power will be the difficulty of organizing a large scale industrial development in an internationally safe way. This presents actually problems much more difficult to solve than any of the technical developments that are necessary, It will require an unusual amount of statesmanship to balance properly the necessity of allaying the international suspicion that arises from withholding technical secrets against the obvious danger of dumping the details of the procedures for an extremely dangerous new method of warfare on a world that may not yet be prepared to renounce war. Furthermore, the proper balance should be found in the relatively short time that will elapse before the 'secrets' will naturally become open knowledge by rediscovery on part of the scientists and engineers of other countries.

  12. Influence of host matrices on krypton electron binding energies and KLL Auger transition energies

    Czech Academy of Sciences Publication Activity Database

    Inoyatov, A. K.; Perevoshchikov, L. L.; Kovalík, Alojz; Filosofov, D. V.; Yushkevich, Yu. V.; Ryšavý, Miloš; Lee, B. Q.; Kibédi, T.; Stuchbery, A. E.; Zhdanov, V. S.

    2014-01-01

    Roč. 197, DEC (2014), s. 64-71 ISSN 0368-2048 R&D Projects: GA ČR(CZ) GAP203/12/1896; GA MŠk LG14004 Institutional support: RVO:61389005 Keywords : Kr-83 * Rb-83 * Sr-83 * electron binding energy * KLL transitions * natural atomic level width * multiconfiguration Dirac-Fock calculations Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 1.436, year: 2014

  13. On the International Atomic Energy Agency

    Energy Technology Data Exchange (ETDEWEB)

    Eklund, S [International Atomic Energy Agency, Vienna (Austria)

    1963-07-15

    The main concepts motivating the decision to establish an international agency for peaceful uses of atomic energy are presented in the paper. They consists of: 1) co-ordination in the fields of safety field, legal liability and safeguards; 2) ensuring that scientific and technical data are made freely accessible on a worldwide scale and 3) assisting the developing countries in benefiting from this new science and technology and use the atomic energy for economic and social development

  14. Externalities of energy and atomic power

    International Nuclear Information System (INIS)

    2006-09-01

    Energy technology ensures not only energy supply but also has great impacts on society and environments. Economical value and effect evaluation alone doesn't mean appropriate so the evaluation of 'externalities' should be appreciated. In order to assess atomic power in this context, the Atomic Energy Society of Japan set up a research committee on 'externalities of energy and atomic power' from April 2002 to March 2006, whose activities were described in this report. In addition to environmental effects and environmental externalities, four areas were newly studied as follows: (1) biological effects of low dose rate exposure and externalities, (2) externalities as social/economical effects including stable supply and security, (3) energy technologies evaluation and (4) social choice and decision-making. (T. Tanaka)

  15. Report of Atomic Energy Group of Advisory Committee for Energy

    International Nuclear Information System (INIS)

    1990-01-01

    The report consists of two chapters. Chapter 1 addresses the present status and future trends in the field of atomic energy. The present conditions of atomic energy development and social background behind them are described first. Features of atomic energy is discussed in relation to its technique-intensive aspect, stability of supply, stability of price, environmental load, and handling of radioactive materials. The relations of these features with energy policies are then discussed, focusing on basic political principles, optimum combination of various energy sources, and the role to be played by atomic energy. This chapter then deals with future trends in atomic energy development efforts and major problems remaining to be solved. Future supply and demand of energy and electric power are discussed. Problems related with atomic energy development are described focusing on some severe conditions depressing the development activities, and measures to be taken immediately. Chapter 2 describes important issues and measures to be taken in the future towards atomic energy development. Discussion is made on safety measures, back-end measures, promotion of location activities, and publicity. (N.K.)

  16. Binding energy of two-dimensional biexcitons

    DEFF Research Database (Denmark)

    Singh, Jai; Birkedal, Dan; Vadim, Lyssenko

    1996-01-01

    Using a model structure for a two-dimensional (2D) biexciton confined in a quantum well, it is shown that the form of the Hamiltonian of the 2D biexciton reduces into that of an exciton. The binding energies and Bohr radii of a 2D biexciton in its various internal energy states are derived...... analytically using the fractional dimension approach. The ratio of the binding energy of a 2D biexciton to that of a 2D exciton is found to be 0.228, which agrees very well with the recent experimental value. The results of our approach are compared with those of earlier theories....

  17. Binding energies of hypernuclei and hypernuclear interactions

    Energy Technology Data Exchange (ETDEWEB)

    Bodmer, A.R. [Argonne National Lab., IL (United States)]|[Univ. of Illinois, Chicago, IL (United States). Dept. of Physics; Murali, S.; Usmani, Q.N. [Jamia Millia Islamia, New Delhi (India). Dept. of Physics

    1996-05-01

    In part 1 the effect of nuclear core dynamics on the binding energies of {Lambda} hypernuclei is discussed in the framework of variational correlated wave functions. In particular, the authors discuss a new rearrangement energy contribution and its effect on the core polarization. In part 2 they consider the interpretation of the {Lambda} single-particle energy in terms of basic {Lambda}-nuclear interactions using a local density approximation based on a Fermi hypernetted chain calculation of the A binding to nuclear matter. To account for the data strongly repulsive 3-body {Lambda}NN forces are required. Also in this framework they discuss core polarization for medium and heavier hypernuclei.

  18. Binding energies of hypernuclei and hypernuclear interactions

    International Nuclear Information System (INIS)

    Bodmer, A.R.; Univ. of Illinois, Chicago, IL; Murali, S.; Usmani, Q.N.

    1996-01-01

    In part 1 the effect of nuclear core dynamics on the binding energies of Λ hypernuclei is discussed in the framework of variational correlated wave functions. In particular, the authors discuss a new rearrangement energy contribution and its effect on the core polarization. In part 2 they consider the interpretation of the Λ single-particle energy in terms of basic Λ-nuclear interactions using a local density approximation based on a Fermi hypernetted chain calculation of the A binding to nuclear matter. To account for the data strongly repulsive 3-body ΛNN forces are required. Also in this framework they discuss core polarization for medium and heavier hypernuclei

  19. The Mean Excitation Energy of Atomic Ions

    DEFF Research Database (Denmark)

    Sauer, Stephan; Oddershede, Jens; Sabin, John R.

    2015-01-01

    A method for calculation of the mean excitation energies of atomic ions is presented, making the calculation of the energy deposition of fast ions to plasmas, warm, dense matter, and complex biological systems possible. Results are reported to all ions of helium, lithium, carbon, neon, aluminum...

  20. The Harnessed Atom: Nuclear Energy & Electricity.

    Science.gov (United States)

    Department of Energy, Washington, DC. Nuclear Energy Office.

    This document is part of a nuclear energy curriculum designed for grades six through eight. The complete kit includes a written text, review exercises, activities for the students, and a teachers guide. The 19 lessons in the curriculum are divided into four units including: (1) "Energy and Electricity"; (2) "Understanding Atoms and Radiation"; (3)…

  1. Atomic Energy Authority Act 1986

    International Nuclear Information System (INIS)

    1986-01-01

    Under this Act the UKAEA is given power to borrow so that it can finance its capital expenditure programme, and will undertake a debt to the Secretary of State for Energy representing its assets. Power is given for the Government to guarantee such borrowing. The UKAEA has been organised financially on the basis of a trading fund. The Act came into force on 1 April 1986. (NEA) [fr

  2. Ozone depletion, greenhouse effect and atomic energy

    International Nuclear Information System (INIS)

    Adzersen, K.H.

    1991-01-01

    After describing the causes and effects of ozone depletion and the greenhouse effect, the author discusses the alternative offered by the nuclear industry. In his opinion, a worldwide energy strategy of risk minimisation will not be possible unless efficient energy use is introduced immediately, efficiently and on a reliable basis. Atomic energy is not viewed as an acceptable means of preventing the threatening climate change. (DG) [de

  3. Atomic Energy Authority Bill (Lords) - second reading

    International Nuclear Information System (INIS)

    1986-01-01

    In the debate in the House of Commons on the second reading of the Atomic Energy Bill, the objective of which is to put the finances of the Authority on to a trading fund basis, the discussion included the following: proposed changes in method of financing the Authority; safety; underlying research; customer relations; accountability; personnel; public relations; radioactive waste management; energy research; parliamentary scrutiny; energy policy; nuclear power; fast reactors; fusion research; government policy. (U.K.)

  4. Review and prospects of Atomic Energy Law

    International Nuclear Information System (INIS)

    Hartkopf, G.

    1983-01-01

    At the 7th German Symposium on Atomic Energy Law which took place on March 16th, 1983 in Goettingen the Undersecretary of State of the Federal Ministery of the Interior, Dr. Guenter Hartkopf, delivered the opening speech. The speech deals with the conditions set by constitutional law and ethics, improvement of nuclear liability, guide line for incident response, participation of the public in licensing procedures under atomic energy law, necessary measures to prevent damage, the concept of waste management. Also in future the safety of the citizens has absolute priority. (orig./HSCH) [de

  5. White paper on atomic energy in 1979

    International Nuclear Information System (INIS)

    1980-01-01

    In Japan, there are currently 21 nuclear power plants in operation with a total capacity of 15,000MW. Under the present situation of the so-called second energy crisis, the role of nuclear power is assuming increasingly more importance. The white paper is presented covering the one year period from October 1978; statistics, however, are for fiscal 1978. Contents are the following: part I general ''world nuclear power situation, advances in nuclear energy, the outlook for 1980s''; part II the status of nuclear power ''nuclear power generation, nuclear power safety, nuclear fuel cycle, international activities, safeguards, development of power reactors, nuclear fusion/nuclear powered ship/high-temperature gas cooled reactor, radiation utilization, basic research, nuclear power industry''; part III references (organization/plans of Atomic Energy Commission etc., atomic energy budgets, nuclear energy statistics, etc.). (J.P.N.)

  6. The energy crisis and Bonn's atomic energy programme

    International Nuclear Information System (INIS)

    Steinhaus, K.; Heimbrecht, J.

    1979-01-01

    What are the background and causes of the energy crisis. In whose interest and on whose back is energy policy made in our country. Will the lights go out without nuclear power. Which are the real goals and dangers of Bonn's atomic energy programme. Is coal a real alternative to nuclear power in the Federal Republic of Germany. What possibilities and requirements are there for a national and democratic energy policy in the Federal Republic of Germany. Which are the central problems of the protest movement against the government's atomic energy programme. These questions, which are still in the centre of political discussion, are investigated by the authors. (orig.) [de

  7. Golden mean energy equals highest atomic electron orbital energy

    Energy Technology Data Exchange (ETDEWEB)

    Malinowski, Leonard J. [Interdisciplinary Research Club, P.O. Box 371, Monroeville, PA 15146 (United States)], E-mail: LJMalinowski@gmail.com

    2009-12-15

    The golden mean numerical value {phi} = 0.5({radical}5 - 1) has been given a physical manifestation through E infinity theory. This short paper relates the golden mean energy 0.618034 MeV to atomic electron orbitals.

  8. Golden mean energy equals highest atomic electron orbital energy

    International Nuclear Information System (INIS)

    Malinowski, Leonard J.

    2009-01-01

    The golden mean numerical value φ = 0.5(√5 - 1) has been given a physical manifestation through E infinity theory. This short paper relates the golden mean energy 0.618034 MeV to atomic electron orbitals.

  9. Atomic Energy Act and ordinances. 8. ed.

    International Nuclear Information System (INIS)

    Anon.

    1978-01-01

    The new issue of the text contains the Atomic Energy Act (AtG) in its new wording of the announcement of 31 Oct 76, the new wording of the ordinances put in effect in 1977: Atomic procedure ordinance (AtVfV), radiation protection ordinance (SSU), and atomic financial security ordinance (AtDeckV); furthermore the x-ray ordinance (RoeV) of 1978 in its wording which has been changed by the radiation protection ordinance. Also printed are the cost ordinance (AtKostV) of 1971, the food irradiation ordinance (LebensmBestrV) in the wording of 1975 and the medicine ordinance (ArzneimV) in the wording of 1971. An addition was made by adding to the liability laws the Paris agreement (PUE) on the liability towards third persons in the field of nuclear energy in the wording of the announcement of 5 Feb 76. (orig./HP) [de

  10. Danish Atomic Energy Commission 1974/75

    International Nuclear Information System (INIS)

    1975-11-01

    Activities of the Danish Atomic Energy Commission and the Risoe eesearch Establishment for the period April1, 1974 to March 31, 1975 are summarized. The operations of the various facilities at the Research Establishment are revised. Operating staff levels and financial data are tabulated, a selected list of staff publications is given, and the design data on research facilities are presented. (B.P.)

  11. Philippine Atomic Energy Commission: Annual report 1983

    International Nuclear Information System (INIS)

    1984-01-01

    This publication gives the highlights of the research and development projects of the Philippine Atomic Energy Commission in agriculture and food, nuclear fuels and power system technology, medicine, public health and nutrition, environmental surveillance, supportive basic research, social response to nuclear technology, nuclear licensing and safeguards, supportive technology and international and local linkages including manpower development. (ELC)

  12. The International Atomic Energy Agency's safeguards system

    International Nuclear Information System (INIS)

    Wagner, W.

    2000-01-01

    A system of international safeguards has been established to provide assurance that nuclear materials in civilian use are not diverted from their peaceful purpose. The safeguards system is administered by the International Atomic Energy Agency/Department of Safeguards and devolves from treaties and other international agreements. Inspectors from the Agency verify reports from States about nuclear facilities by audits, observation, and measurements. (author)

  13. Ghana Atomic Energy Commission: Annual Report 2001

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    This report covers the activities and research progams of the Ghana Atomic Energy Commission for the year 2001. The research programs and associated publications have been grouped under the three main institutes of the Commission namely National Nuclear Research Institute, Radiation Protection Institute and Biotechnology and Nuclear Agricultre Research Institute.

  14. Ghana Atomic Energy Commission: Annual Report 2001

    International Nuclear Information System (INIS)

    2002-01-01

    This report covers the activities and research progams of the Ghana Atomic Energy Commission for the year 2001. The research programs and associated publications have been grouped under the three main institutes of the Commission namely National Nuclear Research Institute, Radiation Protection Institute and Biotechnology and Nuclear Agricultre Research Institute

  15. International Atomic Energy Agency. Highlights of activities

    International Nuclear Information System (INIS)

    Gillen, V.A.

    1991-09-01

    This document provides a brief, well-illustrated summary of the activities of the International Atomic Energy Agency in the months up to September 1991. Especially mentioned are the programmes to enhance the safety of nuclear power, from the study of nuclear reactors to assessing the radiological consequences of reactor accidents, and the areas of non-proliferation and safeguards

  16. International Atomic Energy Agency: Highlights of activities

    International Nuclear Information System (INIS)

    Gillen, A.

    1992-09-01

    This document provides a brief, well-illustrated summary of the activities of the International Atomic Energy Agency in the months up to September 1992. Especially mentioned are the programmes to enhance the safety of nuclear power, from the study of nuclear reactors to assessing the radiological consequences of reactor accidents, and the areas of non-proliferation and safeguards

  17. Institute of Atomic Energy - Annual Report 1999

    International Nuclear Information System (INIS)

    Swiboda, G.

    2000-01-01

    This Annual Report of the Institute of Atomic Energy describes the results of the research works carried out at the Institute at 1999. As in the preceding years the authors of the individual scientific reports published in this Annual Report are fully responsible for their content and layout. The Report contains the information on other activities of the Institute as well

  18. Institute of Atomic Energy - Annual Report 1998

    International Nuclear Information System (INIS)

    Swiboda, G.

    1999-01-01

    This Annual Report of the Institute of Atomic Energy describes the results of the research works carried out at the Institute in 1998. As in the preceding years the authors of the individual scientific reports published in this Annual Report are fully responsible for their content and layout. The Report contains the information on other activities of the Institute as well

  19. Atomic Energy Act with ordinances. 16. ed.

    International Nuclear Information System (INIS)

    Ziegler, E.

    1992-01-01

    The convenient edition contains the entire body of German atomic energy and radiation protection laws in their updated version as of June 1992. Thus it also takes the amendments of the Atomic Energy Act (Article 22 Paragraph 1 Sentence 1 and Paragraph 3 as well as Article 46 Paragraph 3 Atomic Energy Act) into account on the basis of the Law on the Establishment of a Federal Export Office from February 28, 1992 (Code of Federal Laws I, pp. 376 ff). As a result of this law, which became effective as of April 1, 1992, within the scope of business of the Federal Ministry for Economic Affairs, a federal export office was established which was endowed with the status of a federal agency. This office is in charge of administrative and supervisory tasks on the federal level. Within the framework of the atomic energy law this agency is in charge of export and import permits as well as the supervision of the export and import of nuclear fuel and other radioactive materials. (orig./HP) [de

  20. Energy dissipation in multifrequency atomic force microscopy

    Directory of Open Access Journals (Sweden)

    Valentina Pukhova

    2014-04-01

    Full Text Available The instantaneous displacement, velocity and acceleration of a cantilever tip impacting onto a graphite surface are reconstructed. The total dissipated energy and the dissipated energy per cycle of each excited flexural mode during the tip interaction is retrieved. The tip dynamics evolution is studied by wavelet analysis techniques that have general relevance for multi-mode atomic force microscopy, in a regime where few cantilever oscillation cycles characterize the tip–sample interaction.

  1. Viet Nam National Atomic Energy Commission

    International Nuclear Information System (INIS)

    1992-01-01

    Vietnam National Atomic Energy Commission (VINATOM) is a governmental body in charge of organizing and coordinating activities related to use of nuclear energy for peaceful purpose. VINATOM in structure consists of the Nuclear Research Institute (Dalat), the Institute of Nuclear Science and Technology (Hanoi), the Institute for Technology of Radioactive and Rare Elements (Hanoi), and the Centre for Nuclear Technique Application (Ho Chi Minh City). This catalogue introduces profiles of nuclear R and D activities under management by VINATOM. (N.H.A)

  2. Philippine Atomic Energy Commission: Annual report 1982

    International Nuclear Information System (INIS)

    1983-02-01

    This publication enumerates the research and development activities of the Philippine Atomic Energy Commission with priorities geared towards achieving the economic and social upliftment of the Filipinos in the field of agriculture, energy, industry, health and environment. Highlights are summaries of investigations and studies of great importance in crop improvement, animal production, nuclear fuels, nutrition research, not to mention its supportive technology, technical services, nuclear information and public acceptance, and nuclear manpower development. (RTD)

  3. Probing dark energy with atom interferometry

    International Nuclear Information System (INIS)

    Burrage, Clare; Copeland, Edmund J.; Hinds, E.A.

    2015-01-01

    Theories of dark energy require a screening mechanism to explain why the associated scalar fields do not mediate observable long range fifth forces. The archetype of this is the chameleon field. Here we show that individual atoms are too small to screen the chameleon field inside a large high-vacuum chamber, and therefore can detect the field with high sensitivity. We derive new limits on the chameleon parameters from existing experiments, and show that most of the remaining chameleon parameter space is readily accessible using atom interferometry

  4. Probing dark energy with atom interferometry

    Energy Technology Data Exchange (ETDEWEB)

    Burrage, Clare; Copeland, Edmund J. [School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD (United Kingdom); Hinds, E.A., E-mail: Clare.Burrage@nottingham.ac.uk, E-mail: Edmund.Copeland@nottingham.ac.uk, E-mail: Ed.Hinds@imperial.ac.uk [Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ (United Kingdom)

    2015-03-01

    Theories of dark energy require a screening mechanism to explain why the associated scalar fields do not mediate observable long range fifth forces. The archetype of this is the chameleon field. Here we show that individual atoms are too small to screen the chameleon field inside a large high-vacuum chamber, and therefore can detect the field with high sensitivity. We derive new limits on the chameleon parameters from existing experiments, and show that most of the remaining chameleon parameter space is readily accessible using atom interferometry.

  5. Alcohol-Binding Sites in Distinct Brain Proteins: The Quest for Atomic Level Resolution

    Science.gov (United States)

    Howard, Rebecca J.; Slesinger, Paul A.; Davies, Daryl L.; Das, Joydip; Trudell, James R.; Harris, R. Adron

    2011-01-01

    Defining the sites of action of ethanol on brain proteins is a major prerequisite to understanding the molecular pharmacology of this drug. The main barrier to reaching an atomic-level understanding of alcohol action is the low potency of alcohols, ethanol in particular, which is a reflection of transient, low-affinity interactions with their targets. These mechanisms are difficult or impossible to study with traditional techniques such as radioligand binding or spectroscopy. However, there has been considerable recent progress in combining X-ray crystallography, structural modeling, and site-directed mutagenesis to define the sites and mechanisms of action of ethanol and related alcohols on key brain proteins. We review such insights for several diverse classes of proteins including inwardly rectifying potassium, transient receptor potential, and neurotransmit-ter-gated ion channels, as well as protein kinase C epsilon. Some common themes are beginning to emerge from these proteins, including hydrogen bonding of the hydroxyl group and van der Waals interactions of the methylene groups of ethanol with specific amino acid residues. The resulting binding energy is proposed to facilitate or stabilize low-energy state transitions in the bound proteins, allowing ethanol to act as a “molecular lubricant” for protein function. We discuss evidence for characteristic, discrete alcohol-binding sites on protein targets, as well as evidence that binding to some proteins is better characterized by an interaction region that can accommodate multiple molecules of ethanol. PMID:21676006

  6. German Atomic Energy Act turns fifty

    International Nuclear Information System (INIS)

    Schneider, Horst

    2009-01-01

    The German Atomic Energy Act entered into force on January 1, 1960. It turns fifty at the beginning of 2010. Is this a reason to celebrate or rather the opposite? Lawyers, in principle, can view old pieces of legislation from 2 perspectives: On the one hand, aged laws are treated in a spirit of veneration and are celebrated as proven. On the other hand, an anniversary of this kind can be a welcome reason for demands to abolish or, at least, fundamentally renew that law. Over the past half century, the German Atomic Energy Act went through stormy and varied phases both of a legal and a political character. Its 50 th anniversary is likely to spark off very conflicting evaluations as well. A review of legal history shows that the German or, rather, the Federal German Atomic Energy Act (AtG) was not a first-of-its-kind piece of legislation but stemmed from the 1957 EURATOM Treaty, in a way representing a latecomer of that treaty. The Atomic Energy Act experienced a number of important developments throughout its history: - In 1975, compulsory licensing of fuel element factories was introduced. - The back end of the fuel cycle, especially final storage, were incorporated in the Atomic Energy Act comprehensively first in 1976. - In 1985, legislators decided in favor of unlimited nuclear liability. - In 1994 and 1998, only some innovations in special items were introduced under the headings of environmental impact assessment and suitability for repository storage because the controversy about nuclear power did not permit a fundamental alignment towards a more comprehensive modern safety law. - The decision to opt out of the peaceful uses of nuclear power in 2002 drew the final line so far of decisions about directions of nuclear law in a major amendment. In parallel, the decisions by the Federal Constitutional Court and the Federal Administrative Court in the late 1970s and, above all, the 1980s provided important assistance which has remained valid to this day. What is

  7. Binding Energy and Equilibrium of Compact Objects

    Directory of Open Access Journals (Sweden)

    Germano M.

    2014-04-01

    Full Text Available The theoretical analysis of the existence of a limit mass for compact astronomic ob- jects requires the solution of the Einstein’s equations of g eneral relativity together with an appropriate equation of state. Analytical solutions exi st in some special cases like the spherically symmetric static object without energy sou rces that is here considered. Solutions, i.e. the spacetime metrics, can have a singular m athematical form (the so called Schwarzschild metric due to Hilbert or a nonsingula r form (original work of Schwarzschild. The former predicts a limit mass and, conse quently, the existence of black holes above this limit. Here it is shown that, the origi nal Schwarzschild met- ric permits compact objects, without mass limit, having rea sonable values for central density and pressure. The lack of a limit mass is also demonst rated analytically just imposing reasonable conditions on the energy-matter densi ty, of positivity and decreas- ing with radius. Finally the ratio between proper mass and to tal mass tends to 2 for high values of mass so that the binding energy reaches the lim it m (total mass seen by a distant observer. As it is known the negative binding energ y reduces the gravitational mass of the object; the limit of m for the binding energy provides a mechanism for stable equilibrium of any amount of mass to contrast the gravitatio nal collapse.

  8. Binding Energy, Vapor Pressure and Melting Point of Semiconductor Nanoparticles

    International Nuclear Information System (INIS)

    H. H. Farrell; C. D. Van Siclen

    2007-01-01

    Current models for the cohesive energy of nanoparticles generally predict a linear dependence on the inverse particle diameter for spherical clusters, or, equivalently, on the inverse of the cube root of the number of atoms in the cluster. Although this is generally true for metals, we find that for the group IV semiconductors, C, Si and Ge, this linear dependence does not hold. Instead, using first principles, density functional theory calculations to calculate the binding energy of these materials, we find a quadratic dependence on the inverse of the particle size. Similar results have also been obtained for the metallic group IV elements Sn and Pb. This is in direct contradiction to current assumptions. Further, as a consequence of this quadratic behavior, the vapor pressure of semiconductor nanoparticles rises more slowly with decreasing size than would be expected. In addition, the melting point of these nanoparticles will experience less suppression than experienced by metal nanoparticles with comparable bulk binding energies. This non-linearity also affects sintering or Ostwald ripening behavior of these nanoparticles as well as other physical properties that depend on the nanoparticle binding energy. The reason for this variation in size dependence involves the covalent nature of the bonding in semiconductors, and even in the 'poor' metals. Therefore, it is expected that this result will hold for compound semiconductors as well as the elemental semiconductors

  9. Core electron binding energy shifts of AlBr3 and Al2Br6 vapor

    International Nuclear Information System (INIS)

    Mueller, Astrid M.; Plenge, Juergen; Leone, Stephen R.; Canton, Sophie E.; Rude, Bruce S.; Bozek, John D.

    2006-01-01

    The Al 2p and Br 3d inner-shell photoelectron spectra of aluminum tribromide monomer and dimer vapor were measured at 90 and 95 eV photon energy, respectively, to determine the core electron binding energies of the atoms in the two molecular species. While AlBr 3 has three identical Br atoms, Al 2 Br 6 exhibits four terminal and two bridging Br atoms. The species are identified by their distinct valence photoelectron spectra. Comparison of the observed Al 2p 1/2 and Al 2p 3/2 electron binding energies of AlBr 3 with those of Al 2 Br 6 shows that there is a chemical shift of (0.15 ± 0.03) eV to lower energy in the dimer. In Al 2 Br 6 , an assignment is proposed in which the Br 3d 3/2 and Br 3d 5/2 binding energies of terminal Br atoms are (1.18 ± 0.03) eV lower than those of bridging Br atoms. This assignment assumes that both types of Br atoms have similar cross-sections for ionization. With this result, the Br 3d 3/2 and Br 3d 5/2 binding energies of Br atoms in AlBr 3 are (0.81 ± 0.03) eV lower than those of bridging Br atoms of the dimer but (0.37 ± 0.03) eV higher than those of terminal Br atoms of the dimer. The obtained chemical shifts are considered in terms of the binding relations and electron density distributions in both molecules. Chemical shifts that are larger than a few hundred millielectron volts, as observed in the Al 2 Br 6 /AlBr 3 system, offer potential to study the dissociation dynamics of the dimer in a femtosecond visible or ultraviolet-pump/XUV-probe experiment

  10. Nuclear energy and the responsibilities of the Atomic Energy Board

    International Nuclear Information System (INIS)

    De Villiers, J.W.L.

    1980-01-01

    The paper discusses nuclear energy and the responsibilities of the previous Atomic Energy Board, (now the Atomic Energy Corporation) of South Africa in this respect. The paper starts by giving a brief introduction to the Atomic Energy Board, its organization and its functions. Research is undertaken in various fields such as the exploitation of nuclear fuels, radiobiology, radioisotopes, etc. Certain activities of the Board was also more directly related to Koeberg. The paper covers four of these areas, namely the early studies of the feasibility of introducing nuclear power in South Africa; the services involving the Board's special expertise in certain areas which Escom makes use of; the regulatory function and the preparation for handling and disposal of radioactive waste

  11. QED effects on individual atomic orbital energies

    Science.gov (United States)

    Kozioł, Karol; Aucar, Gustavo A.

    2018-04-01

    Several issues, concerning QED corrections, that are important in precise atomic calculations are presented. The leading QED corrections, self-energy and vacuum polarization, to the orbital energy for selected atoms with 30 ≤ Z ≤ 118 have been calculated. The sum of QED and Breit contributions to the orbital energy is analyzed. It has been found that for ns subshells the Breit and QED contributions are of comparative size, but for np and nd subshells the Breit contribution takes a major part of the QED+Breit sum. It has also, been found that the Breit to leading QED contributions ratio for ns subshells is almost independent of Z. The Z-dependence of QED and Breit+QED contributions per subshell is shown. The fitting coefficients may be used to estimate QED effects on inner molecular orbitals. We present results of our calculations for QED contributions to orbital energy of valence ns-subshell for group 1 and 11 atoms and discuss about the reliability of these numbers by comparing them with experimental first ionization potential data.

  12. White paper on atomic energy in 1980

    International Nuclear Information System (INIS)

    1981-01-01

    The nuclear power generation in Japan attained the scale of 21 plants with 15 million kW capacity, and its proportion in electric power supply exceeded 13%. Now it is indispensable for various economic activities and national life, and it is expected that its role as the substitute energy for petroleum will grow more and more in future. The Atomic Energy Commission took up preponderantly the promotion of nuclear power generation and the related measures in view of such situation when the trend in the development and utilization of atomic energy in Japan is reviewed in this white paper. When nuclear power generation is promoted, efforts are exerted on the improvement of safety, and it is necessary to tackle with all might the subjects such as the settlement of LWRs more firmly, the development of new reactors, the establishment of nuclear fuel cycle, and the countermove to complex international situation, while giving consideration to the development of independent technologies. It is most important to obtain national consensus when atomic energy is developed and utilized, as seen in the difficulty of locating nuclear power stations. In this annual report, the events for about one year from October, 1979, are described. Also the related data and documents are shown. (Kako, I.)

  13. The law for the Japan Atomic Energy Research Institute

    International Nuclear Information System (INIS)

    1985-01-01

    The Act for Japan Atomic Energy Research Institute has been promulgated anew. Contents are the following : general rules, officials, advisors and personnel, duties, financial affairs and accounts, supervision, miscellaneous rules, penal provisions, and additional rules. (In the additional rules, the merger into JAERI of Japan Nuclear Ship Research and Development Agency is treated.) Japan Atomic Energy Research Institute conducts research etc. for the development of atomic energy comprehensively and efficiently, thereby contributing to the promotion of atomic energy research, development and utilization, according to the Atomic Energy Fundamental Act. Duties are atomic energy basic and application research, reactor relation, training of the personnel, RIs relation, etc. (Mori, K.)

  14. Responsibility for atomic energy damages and indemnification

    International Nuclear Information System (INIS)

    Pelzer, N.M.

    1980-01-01

    In the Federal Republic of Germany, the overall regulations on civil responsibility for the damages by nuclear fission or the effect of radiation of radioactive materials were established for the first time in the law concerning peaceful use and protection from danger of atomic energy (hereafter referred to as Atomgesetz) in 1959. Responsibility without error was adopted by German legislators. The liability of the owners of atomic energy facilities (Article 25) was distinguished from that of the possessors of radioactive materials (Article 26) under the law. Facility responsibility (Anlagenhaftung) was limited to 500 million German marks at the maximum. Facility owners had the obligation to offer monetary security of 80 million German marks at the maximum by insurances, etc. When disasters exceeded the amount, the owners were exempted by the state up to the maximum 500 million German marks. The Federal Republic adopted the Paris Agreement in 1975 by a law, and the domestic adjustment of Atomgesetz to the European treaty on atomic energy responsibility was made through the third revision of the Gesetz. According to Article 25-1 of Atomgesetz, the regulations of Paris Agreement are first applied to the owners of atomic energy facilities (operators), and as supplement, Articles 25 to 40 of Atomgesetz are applied. The maximum liability amount is 1,000 million German marks. The demand right of indemnification expires in 3 years after demanders find or are bound to find damages and offenders, and terminates in 30 years regardless of whether the former finds the latter or not. Brussels nuclear ship agreement is applied to nuclear ship owners in Germany (Article 25a, Atomgesetz). (Okada, K.)

  15. An Energy Conservation Approach to Adsorbate-Induced Surface Stress and the Extraction of Binding Energy Using Nanomechanics

    Energy Technology Data Exchange (ETDEWEB)

    Pinnaduwage, Lal A [ORNL; Boiadjiev, Vassil I [ORNL; Fernando, G. W. [University of Connecticut, Storrs; Hawk, J. E. [Oak Ridge National Laboratory (ORNL); Wijewardhana, L.C. R. [University of Cincinnati; Gehl, Anthony C [ORNL

    2008-01-01

    Microcantilevers are ideally-suited for the study of surface phenomena due to their large surface-to-volume ratios, which amplify surface effects. We show that when guest molecules bind to atoms/molecules on a microcantilever surface, the released binding energy is retained in the host surface, leading to a metastable state where the excess energy on the surface is manifested as an increase in surface stress leading to the bending of the microcantilever. When the excess energy is released, the microcantilever relaxes back to the original state, and the relaxation time depends on the particular binding process involved. Such experiments were conducted for three binding processes in vapor phase experiments: physisorption, hydrogen bonding, and chemisorption. To our knowledge, such an energy conservation approach has not been taken into account in adsorbate-induced surface effect investigations. Furthermore, these experiments illustrate that detailed molecular-level information on binding energies can be extracted from this simple micromechanical sensor.

  16. Ionization of atoms by high energy photons

    International Nuclear Information System (INIS)

    Amusia, M.Y.; Ioffe, A.F.

    1994-01-01

    Photoionization of atoms by high energy photons is considered. It is emphasized that in this frequency region the cross section and other characteristics of the process are strongly effected by electron shell polarization and rearrangement effects, including that due to inner vacancy Auger decay. In the effects of nuclear structure could be important and noticeable, i.e. of virtual or real excitation of the nucleus degrees of freedom and of the Quantum Electrodynamics vacuum. Ionization accompanied by secondary photon emission (Compton ionization) is analyzed in the considered domain of energies

  17. White paper on atomic energy in 2004

    International Nuclear Information System (INIS)

    2005-03-01

    Since the publication of its last White Paper on Nuclear Energy in 2003, the Atomic Energy Commission of Japan (AEC) summarized trends covering all aspects of nuclear energy over the period up to December 2004. This paper is comprised of a main document and supplementary materials. The first chapter of the main document summarizes the current activities toward national and international understanding and trust promotion of nuclear energy divided along the topics of 'Restoring trust', 'Structuring trust toward new enterprise implementation', 'Establishment of understanding and trust of international society', 'AEC's activities toward creation of new Long-Term Program', and 'Establishment of future understanding and trust. 'The second chapter summarized recent trends of national and private activities based on the Long-Term Program created in November 2000, covering the topics 'Nuclear Energy Policy in Japan', 'Harmony between People, Society and Nuclear Energy', 'Nuclear Power Generation and the Nuclear Fuel Cycle', 'Diversified Development of Nuclear Science and Technology', 'Utilization of Radiation Contributing to People's Lives', 'Harmony between International Society and Nuclear Energy', and 'Foundation to Promote Research, Development and Utilization of Nuclear Energy'. The supplementary materials include lists of AEC decisions, nuclear energy budgets, year-by-year data tables, and other such similar materials. (T. Tanaka)

  18. Proposed general amendments to the atomic energy control regulations

    International Nuclear Information System (INIS)

    1986-01-01

    Canada's Atomic Energy Control Act defines the powers and responsibilities of the Atomic Energy Control Board (AECB). Among these is to make regulations to control the development, application and use of atomic energy. In these proposed general amendments to the Atomic Energy Control Regulations substantial changes are proposed in the designation of the authority of AECB staff, exemptions from licensing, international safeguards, duties of licensees and atomic radiation workers, security of information, and provision for hearings. The scope of the control of atomic energy has been redefined as relating to matters of health, safety, security, international safeguards, and the protection of the environment

  19. Atomic energy law in Indonesia Perundang-undangan tenaga atom di Indonesia/

    International Nuclear Information System (INIS)

    Poernomo, Moendi.

    1980-01-01

    Levels of the development of the National Atomic Energy Agency of Indonesia covering the reorganization and the president's decree concerning the agency since 1958 are presented. The National Atomic Energy Agency BATAN is responsible for application of radioactive materials over the country and the protection of the general public against radioactive hazards. BATAN's missions are embodied with the atomic energy law. (SMN)

  20. Basic law of atomic energy for pacific uses

    International Nuclear Information System (INIS)

    1969-01-01

    This law comprehend information about the pacific uses of atomic energy. Likewise it creates the Commission of Atomic Energy and stipulates: it s organization and functions, regulations and licensures, responsibilities, income and patrimony. (SGB)

  1. Atomic resonances above the total ionization energy

    International Nuclear Information System (INIS)

    Doolen, G.

    1975-01-01

    A rigorous result obtained using the theory associated with dilatation analytic potentials is that by performing a complex coordinate rotation, r/subj/ → r/subj/e/subi//sup theta/, on a Hamiltonian whose potential involves only pairwise Coulombic interactions, one can show that when theta = π/2, no complex eigenvalues (resonances) appear whose energies have a real part greater than the total ionization energy of the atomic system. This appears to conflict with experimental results of Walton, Peart, and Dolder, who find resonance behavior above the total ionization energy of the H -- system and also the theoretical stabilization results of Taylor and Thomas for the same system. A possible resolution of this apparent conflict is discussed and a calculation to check its validity is proposed

  2. Formation Mechanism and Binding Energy for Body-Centred Regular Icosahedral Structure of Li13 Cluster

    International Nuclear Information System (INIS)

    Liu Weina; Li Ping; Gou Qingquan; Zhao Yanping

    2008-01-01

    The formation mechanism for the body-centred regular icosahedral structure of Li 13 cluster is proposed. The curve of the total energy versus the separation R between the nucleus at the centre and nuclei at the apexes for this structure of Li 13 has been calculated by using the method of Gou's modified arrangement channel quantum mechanics (MACQM). The result shows that the curve has a minimal energy of -96.951 39 a.u. at R = 5.46a 0 . When R approaches to infinity, the total energy of thirteen lithium atoms has the value of -96.564 38 a.u. So the binding energy of Li 13 with respect to thirteen lithium atoms is 0.387 01 a.u. Therefore the binding energy per atom for Li 13 is 0.029 77 a.u. or 0.810 eV, which is greater than the binding energy per atom of 0.453 eV for Li 2 , 0.494 eV for Li 3 , 0.7878 eV for Li 4 , 0.632 eV for Li 5 , and 0.674 eV for Li 7 calculated by us previously. This means that the Li 13 cluster may be formed stably in a body-centred regular icosahedral structure with a greater binding energy

  3. Report to the International Atomic Energy Agency

    International Nuclear Information System (INIS)

    Woznicka, U.

    1986-07-01

    The results of research done under the International Atomic Energy Agency Contract no 4121/RB: 'Measurement of the thermal neutron macroscopic absorption cross-section on small samples' at the Institut of Nuclear Physics during the period from July 1, 1985 to June 30, 1986 are presented. The research was based on the Plexiglass thermal neutron diffusion parameters and on the method of preparation of the rock samples for the measurements according to the INP method. Three rock samples delivered by the IAEA: Ottawa Sand, Royer Dolomite and Dunite Sand have been measured. (author)

  4. 1992 developments in Atomic Energy Law

    International Nuclear Information System (INIS)

    Manger, R.

    1993-01-01

    The draft legislation amending the German Atomic Energy Act existing since the autumn of 1992 clearly focuses of the back end of the fuel cycle. Spent fuel and waste management is to be opened up, privatized, and paid for. Opening spent fuel and waste management supplement the former priority given to the utilization of radioactive residues by an equivalent option, i.e. the orderly disposal of such waste which, at present, is permitted only under very limited conditions. The draft still needs to be harmonized with other ministries. (orig.) [de

  5. Atomic energy wants new personality. An essay of education and personality in atomic energy

    International Nuclear Information System (INIS)

    Takuma, Masao

    2004-01-01

    New personality in atomic energy consists of personification of independence, democracy and publication. They are able to create new technologies and new plants with safety and maintenance. The technical experts and all the parties concerned have to explain the situation and the conditions of atomic energy in order to justify the people's trust in them. Only good personality with morals can obtain the confidence of the nation. It is important for new technical experts and all the parties concerned to receive an education related to sociality. (S.Y.)

  6. The industrial development of atomic energy

    International Nuclear Information System (INIS)

    Kowarski, L.

    1955-01-01

    Countries with large stock of fissile material and producing large quantity of nuclear pure 235 U and 239 Pu are able to allocate part of the stock to non military research. For countries with low stock of fissile material, all the stock is allocated to military research. An economical and technical solution has to be find to dedicate a part of fissile material to non military research and develop the atomic energy industry. It stated the industrial and economical problems and in particular the choice between the use of enriched fuel with high refining cost or depleted fuel with low production cost. It discusses of four possible utilizations of the natural resources: reactors functioning with pure fissile material ( 235 U or 239 Pu) or concentrated material ( 235 U mixed with small quantities of 238 U after an incomplete isotopic separation), breeder reactors functioning with enriched material mixed with 238 U or Thorium placed in an appropriate spatial distribution to allow neutrons beam to activate 238 U or Thorium with the regeneration of fissile material in 239 Pu, reactors using natural uranium or low enriched uranium can also produce Plutonium with less efficiency than breeder reactors and the last solution being the use of natural uranium with the only scope of energy production and no production of secondary fissile material. The first class using pure fissile material has a low energy efficiency and is used only by large fissile material stock countries to accumulate energy in small size fuel for nuclear engines researches for submarines and warships. The advantage of the second class of reactors, breeder reactors, is that they produce energy and plutonium. Two type of breeder reactor are considered: breeder reactor using pure fissile material and 238 U or breeder reactor using the promising mixture of pure fissile material and Thorium. Different projects are in phase of development in United States, England and Scotland. The third class of reactor using

  7. An energy conservation approach to adsorbate-induced surface stress and the extraction of binding energy using nanomechanics

    Science.gov (United States)

    Pinnaduwage, Lal A.; Boiadjiev, Vassil I.; Hawk, John E.; Gehl, Anthony C.; Fernando, Gayanath W.; Rohana Wijewardhana, L. C.

    2008-03-01

    Surface stress induced by molecular adsorption in three different binding processes has been studied experimentally using a microcantilever sensor. A comprehensive free-energy analysis based on an energy conservation approach is proposed to explain the experimental observations. We show that when guest molecules bind to atoms/molecules on a microcantilever surface, the released binding energy is retained in the host surface, leading to a metastable state where the excess energy on the surface is manifested as an increase in surface stress leading to the bending of the microcantilever. The released binding energy appears to be almost exclusively channeled to the surface energy, and energy distribution to other channels, including heat, appears to be inactive for this micromechanical system. When this excess surface energy is released, the microcantilever relaxes back to the original state, and the relaxation time depends on the particular binding process involved. Such vapor phase experiments were conducted for three binding processes: physisorption, hydrogen bonding, and chemisorption. Binding energies for these three processes were also estimated.

  8. An energy conservation approach to adsorbate-induced surface stress and the extraction of binding energy using nanomechanics

    Energy Technology Data Exchange (ETDEWEB)

    Pinnaduwage, Lal A; Boiadjiev, Vassil I; Hawk, John E; Gehl, Anthony C [Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831-6122 (United States); Fernando, Gayanath W [Physics Department, University of Connecticut, Storrs, CT 06269 (United States); Wijewardhana, L C Rohana [Physics Department, University of Cincinnati, Cincinnati, OH 45221 (United States)

    2008-03-12

    Surface stress induced by molecular adsorption in three different binding processes has been studied experimentally using a microcantilever sensor. A comprehensive free-energy analysis based on an energy conservation approach is proposed to explain the experimental observations. We show that when guest molecules bind to atoms/molecules on a microcantilever surface, the released binding energy is retained in the host surface, leading to a metastable state where the excess energy on the surface is manifested as an increase in surface stress leading to the bending of the microcantilever. The released binding energy appears to be almost exclusively channeled to the surface energy, and energy distribution to other channels, including heat, appears to be inactive for this micromechanical system. When this excess surface energy is released, the microcantilever relaxes back to the original state, and the relaxation time depends on the particular binding process involved. Such vapor phase experiments were conducted for three binding processes: physisorption, hydrogen bonding, and chemisorption. Binding energies for these three processes were also estimated.

  9. Constitutional relevance of atomic energy law

    International Nuclear Information System (INIS)

    Lettow, S.

    1980-01-01

    In a decision publicized on December 20, 1979 the German Federal Constitutional Court rejected a claim of unconstitutionality in connection with the licensing procedure of the Muelheim-Kaerlich Nuclear Power Station currently under construction. This constitutes confirmation, by the 1st Department of the Court, of a decision in 1978 by the 2nd Department about the Kalkar fast breeder power plant, in which the peaceful utilization of nuclear energy had been found to be constitutional. However, the new decision by the Federal Constitutional Court particularly emphasizes the constitutional relevance of the rules of procedure under the Atomic Energy Act and their function with respect to the protection of civil rights. (orig.) [de

  10. Ninth German symposium on atomic energy law

    International Nuclear Information System (INIS)

    Lukes, R.; Birkhofer, A.

    1991-01-01

    The symposium dealt with the forthcoming amendment to the Atomic Energy Law. There was an introductory presentation of the plans of the Federal Government for the amendment the aims attached to the amendment as seen by the Social Democratic Party and the revival of the nuclear option. The topics of the five work sessions were: questions concerning constitutional law - Laender administration on behalf of the Federal Government - subordinate legislation in the system of energy law; legislation on liability; financial security financing of decommissioning; licensing, supervision, retrofitting; waste disposal, ultimate waste disposal, fuel cycle. All lectures held in the work sessions and the reports on the discussions following them are included. Finally the amendment project was considered from the technological point of view and a resume was drawn. All 22 lectures have been seperately prepared for retrieval from the database. (HSCH) [de

  11. Nuclear energy: salvaging the atomic age

    International Nuclear Information System (INIS)

    Weinberg, A.M.

    1979-01-01

    The history of atomic power is reviewed from the first chain reaction in Chicago in 1942 to the worst-to-date accident at the Three Mile Island power plant in March, 1979. While media coverage during the Three Mile Island incident made the public aware of some reactor hardware and radiation hazards, Weinberg suggests that an acceptable nuclear future should have six characteristics: increased physical isolation of reactors, further technical improvements, separation of generation and distribution, professionalization of the nuclear cadre, heightened security, and public education about the hazards of radiation. Weinberg feels the question of low-level radiation effects to be critical to public acceptance of nuclear energy. Since the effects (if any) are so rarely seen because exposures are so small, the issue may be beyond the ability of science to decipher. Weinberg again explains his reference to nuclear energy as a Faustian Bargain: ''...nuclear energy, that miraculous and quite unsuspected source of energy, demands an unprecedented degree of expertise, attention to detail, and social stability. In return, man has, in the breeder reactor, an inexhaustible energy source.''

  12. India's atomic energy programme - Past and future

    International Nuclear Information System (INIS)

    Sethna, H.N.

    1979-01-01

    A review is given of the development of the atomic energy program in India, beginning with the work of individual scientists in the period before Indian independence in 1948 and continuing through the establishment in 1954 of the Department of Atomic Energy on up to the present. It was recognized at an early stage of development that the most important task for the introduction of nuclear technology in India was to establish a cadre of scientists and engineers and to generate interactions among various scientific disciplines and, at an appropriate stage, to translate the interaction into concrete projects. Effort is made to rely on indigenous resources with the goal of making the country as self-sufficient as possible in the nuclear field. The technology developed in the nuclear program is shown to be transferable to numerous fields. The availability of adequate investment capital, as a consequence of competition from the other developing programs, is recognized as a possible constraint on the nuclear program

  13. Atomic energy for the peace and progress

    International Nuclear Information System (INIS)

    Solis, L.

    2000-06-01

    This document is a poster of the Commission of Atomic Energy of Costa Rica. In it some uses of atomic energy in Costa Rica, are mentioned. Some of them are: the technical cooperation, which has permitted to develop and to fortify the production and control of radio pharmaceuticals in the nuclear services of medicine. The diagnoses and medical processing, to acquire new equipment and to consolidate the maintenance and service of nuclear instrumentation. By means of technical of induced mutations, they have developed agricultural resistant varieties to the environmental conditions. Control of ripeness, genetic improvement of seeds, resistance to the illnesses and efficiency of the agronomic performance. The isotopic techniques of traces have great importance to evaluate the hydric resources, and their risk of contamination with toxic metals and pesticides. Nuclear techniques have been used to obtain information and to deepen in their knowledge. A laboratory of radiology control was established in the Technological Institute of Costa Rica, to give service to the industrial installations. To access the information of this field, the Nuclear Center of Information can be consulted, in the University of Costa Rica. (author) [es

  14. Project of Atomic Energy Technology Record

    International Nuclear Information System (INIS)

    Song, K. C.; Ko, Y. C.; Kwon, K. C.

    2012-12-01

    Project of the Atomic Energy Technology Record is the project that summarizes and records whole process, from the background to the performance, of each category in all fields of nuclear science technology which have been researched and developed at KAERI. This project includes development of Data And Documents Advanced at KAERI. This project includes development of Data And Documents Advanced Management System(DADAMS) to collect, organize and preserve various records occurred in each research and development process. In addition, it means the whole records related to nuclear science technology for the past, present and future. This report summarizes research contents and results of 'Project of Atomic Energy Technology Record'. Section 2 summarizes the theoretical background, the current status of records management in KAERI and the overview of this project. And Section 3 to 6 summarize contents and results performed in this project. Section 3 is about the process of sectoral technology record, Section 4 summarizes the process of Information Strategy Master Plan(ISMP), Section 5 summarizes the development of Data And Documents Advanced Management System(DADAMS) and Section 6 summarizes the process of collecting, organizing and digitalizing of records

  15. Amendment of Atomic Energy Basic Law and the development of Atomic Energy Administration

    International Nuclear Information System (INIS)

    Ochi, Kenji

    1978-01-01

    This article explains the key points of the major development of Atomic Energy Administration recently made by amendments of Atomic Energy Basic Law and other two relating laws. These amendments passed through the Diet and were enacted on 7th, June, 1978. The aim of them is focussed on reinforcement and rearrangement of safety controls on nuclear reactors. Previously, although the approval of the installation plan with basic designs of a nuclear reactor has been done by Prime Minister, further approvals of detailed designs and process of construction works, as well as inspections before and after operation have been conducted by each responsible minister, respectively. That is, those controls for power reactors have been within jurisdiction of minister of Trade and Industry, and for nuclear ships' reactors minister of Transportation has been responsible. Under the new system, above mentioned ministers continue to exercise almost same controls over reactors within their jurisdiction respectively, however the new laws have established so-called ''double check'' principle in that: when each responsible minister approves the installation, detailed designs and further stages of construction and operation of the reactor, he should hear and pay a great regard for opinions of Atomic Energy Commission and Atomic Energy Safety Commission. The latter is newly established organization which has similar status and authority to the former. (J.P.N.)

  16. First calculation of the deuteron binding energy

    International Nuclear Information System (INIS)

    Schaegger, B.

    2012-01-01

    No universal constant characterizing the nuclear force has yet been found as for gravity and electromagnetism. The neutron is globally neutral with a zero net charge. The charges contained in a neutron may be separated by the electric field of a nearby proton and therefore being attracted by electrostatic induction in the same way as a rubbed plastic pen attracts small pieces of paper. There is also a magnetic force that may repel the nucleons like magnets in the proper relative orientation. In the deuteron, the heavy hydrogen nucleus, the induced electrostatic attraction is equilibrated by the magnetic repulsion between the opposite and colinear moments of the nucleons. Equilibrium is calculated by minimizing the electromagnetic interaction potential, giving a binding energy of 1.6 MeV, not much lower than the experimental value, 2.2 MeV. No fitting parameter is used: it is a true ab initio calculation

  17. Measuring Intermolecular Binding Energies by Laser Spectroscopy.

    Science.gov (United States)

    Knochenmuss, Richard; Maity, Surajit; Féraud, Géraldine; Leutwyler, Samuel

    2017-02-22

    The ground-state dissociation energy, D0(S0), of isolated intermolecular complexes in the gas phase is a fundamental measure of the interaction strength between the molecules. We have developed a three-laser, triply resonant pump-dump-probe technique to measure dissociation energies of jet-cooled M•S complexes, where M is an aromatic chromophore and S is a closed-shell 'solvent' molecule. Stimulated emission pumping (SEP) via the S0→S1 electronic transition is used to precisely 'warm' the complex by populating high vibrational levels v" of the S0 state. If the deposited energy E(v") is less than D0(S0), the complex remains intact, and is then mass- and isomer-selectively detected by resonant two-photon ionization (R2PI) with a third (probe) laser. If the pumped level is above D0(S0), the hot complex dissociates and the probe signal disappears. Combining the fluorescence or SEP spectrum of the cold complex with the SEP breakoff of the hot complex brackets D0(S0). The UV chromophores 1-naphthol and carbazole were employed; these bind either dispersively via the aromatic rings, or form a hydrogen bond via the -OH or -NH group. Dissociation energies have been measured for dispersively bound complexes with noble gases (Ne, Kr, Ar, Xe), diatomics (N2, CO), alkanes (methane to n-butane), cycloalkanes (cyclopropane to cycloheptane), and unsaturated compounds (ethene, benzene). Hydrogen-bond dissociation energies have been measured for H2O, D2O, methanol, ethanol, ethers (oxirane, oxetane), NH3 and ND3.

  18. The way that Ibaraki Prefecture has tackled atomic energy

    International Nuclear Information System (INIS)

    Nakata, Hirokatsu; Hirai, Yasuo; Tsuji, Tadashi.

    1996-01-01

    First, the development of the district centering around Tokai Village is mentioned, where at present Japan Atomic Energy Research Institute, Power Reactor and Nuclear Fuel Development Corporation, Japan Atomic Power Co. and others are located. Ibaraki Prefecture investigated the effects that atomic energy facilities exerted economically and socially to the district. As to the social environment investigation related to atomic energy facilities, its purpose, the objects of investigation, the contents and the method of investigation are reported. As to the progress of the development and utilization of atomic energy in Ibaraki Prefecture, 23 establishments are located in the district. Also there are 16 power reactors and research reactors, one fuel reprocessing plant, 4 nuclear fuel fabrication facilities, 86 nuclear fuel using facilities and 28 radioisotope using facilities. Their situations are reported. As to the atomic energy administration of Ibaraki Prefecture, the safety administration and the countermeasures for surrounding areas are explained. The effects exerted to the society and the economy of the district are reported. The results of the investigation of the conscience concerning atomic energy of residents are shown about energy and atomic energy, atomic energy administration, and the relation of atomic energy facilities with the district. (K.I.)

  19. Why atomic energy affects Civil Law

    International Nuclear Information System (INIS)

    Knieper, R.

    1980-01-01

    Based on the decision of July 20, 1979 by the Amtsgericht Stuttgart, which dismissed the complaint filed by the Technische Werke der Stadt Stuttgart (public utility) against electricity boycotters as being unfounded for the time being, the author states that a political function is due to Civil Law. The concrete question is whether political considerations have surpassed the limits of laws and interpretations bound by the basic rights. The relationship between a customer depending on power supply and the supply monopolist exceeds contractual relationship by far since it is a social relationship: it is inescapably embraced by the customer's dependence on power supply and by the customer being subject to research work. Atomic energy is being introduced into law of contract by means of dogmatic crutches - breach of additional obligation under a contract. However, in Civil Law, there are a great number of such means enabling solutions to be corrected which seem to be inadequate. (HSCH) [de

  20. Atomic Energy Control Board vocabulary - preliminary edition

    International Nuclear Information System (INIS)

    Nolet, D.

    1995-09-01

    This preliminary edition was prepared at the Board's request to help it establish a standardized terminology. It was produced by scanning the 99 French and English documents listed at the end of this Vocabulary. The documents include legislation concerning atomic energy and the transportation of radioactive materials, as well as the Board's publications, such as the Consultative Documents, Regulatory Documents and Notices. The terms included from the following areas are: radiation protection, reactor technology, nuclear fuel cycle, radioactive material packaging and transportation, radioactive waste management, uranium mines, and medical and industrial applications of radioelements. Also included are the titles of publications and the names of organizations and units. The vocabulary contains 2,589 concepts, sometimes accompanied by definitions, contexts or usage examples. Where terms have been standardized by the Canadian Committee for the Standardization of Nuclear Terminology, this has been indicated. Where possible, we have verified the terms using the TERMIUM, the Government of Canada Linguistic Data Bank. (author)

  1. Admissibility of appeals in atomic energy law

    International Nuclear Information System (INIS)

    Rengeling, H.W.

    1981-01-01

    Using two decisions made by the Federal Court of Administration on the Whyl reactor on July 17, 1980, and on the Stade reactor on December 22, 1980, which he considers as having at least an orientation effect, the author examines the admissibility of appeals filed according to the Atomic Energy Law. For substantiating the appeal, he discusses rules of law that protect third parties and the complainant's obligation to substantiate the appeal. In view of the preclusion of objectives, he differentiates between 'forfeiture' preclusion and 'validity' preclusion. In his view, the above-mentioned decisions produce effects that are to the benefit of the constitutional state and the necessary further development of economy and technology. (HSCH) [de

  2. The China Institute of Atomic Energy

    International Nuclear Information System (INIS)

    Fan Mingwu

    2001-01-01

    The China Institute of Atomic Energy (CIAE), established in 1950, carries out multidisciplinary research in nuclear science, technology and engineering. It has three research reactors and ten low energy accelerators. The focus of its nuclear energy related R and D is on reactor engineering and technology. In the area of nuclear techniques for applications, R and D is carried out on accelerators, isotope production, nuclear electronics and utilization of radioisotopes and radiation. There is also a strong programme in basic nuclear physics and radiochemistry. New major facilities under construction in CIAE include China Advanced Research Reactor (flux 8x10 14 n/cm 2 /sec) and China Experimental Fast Reactor. China has been successfully using the products of its R and D for a variety of applications in medicine, industry, materials science etc. A dynamic research programme is tuned to attract young talent to CIEA and there is good collaboration with the Beijing University. CIEA has been an active participant of RCA programmes of the IAEA and has been a resource for many developing countries. The management expects the Institute to be a leading multidisciplinary institute in the field of nuclear science, technology and engineering. (author)

  3. Israel Atomic Energy Commission 1997 Annual Report

    International Nuclear Information System (INIS)

    1997-01-01

    The 1997 Annual Report is published in a special year for Israel, marking the 50th anniversary of its independece and statehood. From its inception, and the election of a distinguished scientist as its first president, Israel has regarded science and technology as a central pillar for future AEC development and a lever for improved quality of life of its people. The Israel Atomic Energy Commission, which will be celebrating its own anniversary in a few years, has made a modest but significant contribution to the establishment and growth of the technological infrastructure of the country. The first article in this Annual Report focuses attention on yet another aspect of our continuing investigation of the basic properties of technologically interesting and important materials, presented in our 1994 and 1996 Annual Reports. The current entry describes an application of the nuclear Time Differential Perturbed Angular Correlation technique to the study of the structure and properties of metal-hydrogen compounds, of potential interest within the framework of future, environmentally attractive hydrogen-burning energy systems, and in fusion power reactors. The second article also relates to some basic aspects of nuclear fusion. A theoretical study of the behavior and properties of laser-generated hot plasmas resulted in the proposal of a new confinement scheme, in which a plasma generated by circularly polarized laser light is confined in a miniature magnetic bottle created by magnetic fields induced in the plasma by the same light. The paper discusses the conditions under which such confinement and ensuing energy gain may be achieved. Measurements of actual axial magnetic fields generated in plasma by intense circularly polarized laser light are also reported. The third report describes one of our ongoing efforts to improve and streamline the techniques and procedures used in medical applications of radioisotopes. Replacement of the customary )311 solutions for

  4. Israel Atomic Energy Commission 1997 Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-12-31

    The 1997 Annual Report is published in a special year for Israel, marking the 50th anniversary of its independece and statehood. From its inception, and the election of a distinguished scientist as its first president, Israel has regarded science and technology as a central pillar for future AEC development and a lever for improved quality of life of its people. The Israel Atomic Energy Commission, which will be celebrating its own anniversary in a few years, has made a modest but significant contribution to the establishment and growth of the technological infrastructure of the country. The first article in this Annual Report focuses attention on yet another aspect of our continuing investigation of the basic properties of technologically interesting and important materials, presented in our 1994 and 1996 Annual Reports. The current entry describes an application of the nuclear Time Differential Perturbed Angular Correlation technique to the study of the structure and properties of metal-hydrogen compounds, of potential interest within the framework of future, environmentally attractive hydrogen-burning energy systems, and in fusion power reactors. The second article also relates to some basic aspects of nuclear fusion. A theoretical study of the behavior and properties of laser-generated hot plasmas resulted in the proposal of a new confinement scheme, in which a plasma generated by circularly polarized laser light is confined in a miniature magnetic bottle created by magnetic fields induced in the plasma by the same light. The paper discusses the conditions under which such confinement and ensuing energy gain may be achieved. Measurements of actual axial magnetic fields generated in plasma by intense circularly polarized laser light are also reported. The third report describes one of our ongoing efforts to improve and streamline the techniques and procedures used in medical applications of radioisotopes. Replacement of the customary 311 solutions for

  5. Fitting theories of nuclear binding energies

    International Nuclear Information System (INIS)

    Bertsch, G.F.; Sabbey, B.; Uusnaekki, M.

    2005-01-01

    In developing theories of nuclear binding energy such as density-functional theory, the effort required to make a fit can be daunting because of the large number of parameters that may be in the theory and the large number of nuclei in the mass table. For theories based on the Skyrme interaction, the effort can be reduced considerably by using the singular value decomposition to reduce the size of the parameter space. We find that the sensitive parameters define a space of dimension four or so, and within this space a linear refit is adequate for a number of Skyrme parameters sets from the literature. We find no marked differences in the quality of the fit among the SLy4, the BSk4, and SkP parameter sets. The root-mean-square residual error in even-even nuclei is about 1.5 MeV, half the value of the liquid drop model. We also discuss an alternative norm for evaluating mass fits, the Chebyshev norm. It focuses attention on the cases with the largest discrepancies between theory and experiment. We show how it works with the liquid drop model and make some applications to models based on Skyrme energy functionals. The Chebyshev norm seems to be more sensitive to new experimental data than the root-mean-square norm. The method also has the advantage that candidate improvements to the theories can be assessed with computations on smaller sets of nuclei

  6. Binding-energy distribution and dephasing of localized biexcitons

    DEFF Research Database (Denmark)

    Langbein, Wolfgang Werner; Hvam, Jørn Märcher; Umlauff, M.

    1997-01-01

    We report on the binding energy and dephasing of localized biexciton states in narrow ZnSe multiple quantum wells. The measured binding-energy distribution of the localized biexcitons shows a width of 2.2 meV centered at 8.5 meV, and is fairly independent of the exciton localization energy. In fo...

  7. Atomic energy policy in fiscal year 1985

    International Nuclear Information System (INIS)

    Sakurada, Michio

    1985-01-01

    The international demand and supply of petroleum advance in relaxed condition at present, but tend to get stringent in long term. Nuclear power is the most promising substitute energy for petroleum, and in Japan, 28 nuclear power plants with 20.56 million kW output are in operation, generating 20.4% of the total generated power in 1983. According to the perspective of long term power supply, the installed capacity of nuclear power plants will reach 62 million kW and 27% of the total installed capacity by 2000. It is important to positively deal with the industrialization of nuclear fuel cycle, the upgrading of nuclear power generation, the development of the reactors of new types and so on, preparing for the age that nuclear power generation will become the center of power supply. The atomic energy policy of the Ministry of International Trade and Industry in fiscal year 1985 is reflected to the budget, financial investment and funding and other measures based on the above viewpoint. The outline of the budget and financial investment and funding for fiscal year 1985 is explained. The points are the promotion of industrialization of nuclear fuel cycle, the promotion of nuclear power generation and the promotion of understanding and cooperation of nation on the location of electric power sources. (Kako, I.)

  8. Israel Atomic Energy Commission 1996 Annual Report

    International Nuclear Information System (INIS)

    1996-01-01

    Selecting the research efforts to be highlighted in the Israel Atomic Energy Commission's Annual Report from the large body and broad spectrum of ongoing work is not an easy task. The extensive bibliography of published results attached to the report attests to the scope of this difficulty. Of the many worthwhile projects, four were chosen to represent best the current trends in the continuing R and D program at the research centers of the Israel Atomic Energy Commission. One of these trends is the growing cooperation with private industry, in an attempt to gear our R and D programs to respond to market demands. Another feature, noted already several years ago, is the extensive collaboration of our scientists and engineers with colleagues at other institutions, in Israel and abroad. some of the work reported is part of evolving international industrial cooperation projects, illustrating both these trends. Following a trend common to many nuclear research centers around the world, a substantial part of our research effort is non-nuclear in nature. This is illustrated in the first article, which deals with advances in the application of non-linear optics in diverse fields of science and technology. These include state-of-the-art solid-state lasers, rapid modulation of light signals, development and generation of tunable sources of coherent light, optical data storage and the microscopic probing of biological and inorganic samples. The present work reports on a range of R and D, from the fundamentals of non-linear optical materials to proof-of-principle demonstrations of non-linear subwavelength resolution microscopy, to fabrication of prototype commercial tunable laser systems The second report considers the microstrain characteristics in some alloys using X-ray diffraction (XRD). The research utilizes XRD line broadening effects to study the characteristics of alloys from especially prepared surfaces. These characteristics include the homogeneity of alloying

  9. Israel Atomic Energy Commission 1996 Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-31

    Selecting the research efforts to be highlighted in the Israel Atomic Energy Commission`s Annual Report from the large body and broad spectrum of ongoing work is not an easy task. The extensive bibliography of published results attached to the report attests to the scope of this difficulty. Of the many worthwhile projects, four were chosen to represent best the current trends in the continuing R and D program at the research centers of the Israel Atomic Energy Commission. One of these trends is the growing cooperation with private industry, in an attempt to gear our R and D programs to respond to market demands. Another feature, noted already several years ago, is the extensive collaboration of our scientists and engineers with colleagues at other institutions, in Israel and abroad. some of the work reported is part of evolving international industrial cooperation projects, illustrating both these trends. Following a trend common to many nuclear research centers around the world, a substantial part of our research effort is non-nuclear in nature. This is illustrated in the first article, which deals with advances in the application of non-linear optics in diverse fields of science and technology. These include state-of-the-art solid-state lasers, rapid modulation of light signals, development and generation of tunable sources of coherent light, optical data storage and the microscopic probing of biological and inorganic samples. The present work reports on a range of R and D, from the fundamentals of non-linear optical materials to proof-of-principle demonstrations of non-linear subwavelength resolution microscopy, to fabrication of prototype commercial tunable laser systems The second report considers the microstrain characteristics in some alloys using X-ray diffraction (XRD). The research utilizes XRD line broadening effects to study the characteristics of alloys from especially prepared surfaces. These characteristics include the homogeneity of alloying

  10. DBAC: A simple prediction method for protein binding hot spots based on burial levels and deeply buried atomic contacts

    Science.gov (United States)

    2011-01-01

    Background A protein binding hot spot is a cluster of residues in the interface that are energetically important for the binding of the protein with its interaction partner. Identifying protein binding hot spots can give useful information to protein engineering and drug design, and can also deepen our understanding of protein-protein interaction. These residues are usually buried inside the interface with very low solvent accessible surface area (SASA). Thus SASA is widely used as an outstanding feature in hot spot prediction by many computational methods. However, SASA is not capable of distinguishing slightly buried residues, of which most are non hot spots, and deeply buried ones that are usually inside a hot spot. Results We propose a new descriptor called “burial level” for characterizing residues, atoms and atomic contacts. Specifically, burial level captures the depth the residues are buried. We identify different kinds of deeply buried atomic contacts (DBAC) at different burial levels that are directly broken in alanine substitution. We use their numbers as input for SVM to classify between hot spot or non hot spot residues. We achieve F measure of 0.6237 under the leave-one-out cross-validation on a data set containing 258 mutations. This performance is better than other computational methods. Conclusions Our results show that hot spot residues tend to be deeply buried in the interface, not just having a low SASA value. This indicates that a high burial level is not only a necessary but also a more sufficient condition than a low SASA for a residue to be a hot spot residue. We find that those deeply buried atoms become increasingly more important when their burial levels rise up. This work also confirms the contribution of deeply buried interfacial atomic contacts to the energy of protein binding hot spot. PMID:21689480

  11. A simple nonbinary scattering model applicable to atomic collisions is crystals at 1ow energies

    DEFF Research Database (Denmark)

    Andersen, Hans Henrik; Sigmund, Peter

    1966-01-01

    the asymptotic velocities of the ring atoms as well as the energy loss of the projectile. Furthermore, it can be decided whether the projectile is reflected by the ring. Both the feasibility of assumptions specifying the problem and the validity of different approximations made in the transformation from...... previously. Inelastic contributions to the energy loss can easily be included. The oscillator forces binding lattice atoms turn out to influence the scattering process only at very small energies. The validity of the so-called momentum approximation and a related perturbation method are also investigated....

  12. Atomic Energy Control Act, c A.19, s.1

    International Nuclear Information System (INIS)

    1985-01-01

    The Revised Statutes of Canada 1985 entered into force on 12 December 1988, revoking the previous Atomic Energy Control Act and replacing it with a new version. The new Act (Chapter A-16 of the Revised Statutes) updates the previous text and makes some linguistic corrections. The Atomic Energy Control Act establishes the Atomic Energy Control Board and sets out its duties and powers which include, in particular, the making of regulations for developing, controlling and licensing the production, application and use of atomic energy [fr

  13. Conformational Transitions and Convergence of Absolute Binding Free Energy Calculations

    Science.gov (United States)

    Lapelosa, Mauro; Gallicchio, Emilio; Levy, Ronald M.

    2011-01-01

    The Binding Energy Distribution Analysis Method (BEDAM) is employed to compute the standard binding free energies of a series of ligands to a FK506 binding protein (FKBP12) with implicit solvation. Binding free energy estimates are in reasonably good agreement with experimental affinities. The conformations of the complexes identified by the simulations are in good agreement with crystallographic data, which was not used to restrain ligand orientations. The BEDAM method is based on λ -hopping Hamiltonian parallel Replica Exchange (HREM) molecular dynamics conformational sampling, the OPLS-AA/AGBNP2 effective potential, and multi-state free energy estimators (MBAR). Achieving converged and accurate results depends on all of these elements of the calculation. Convergence of the binding free energy is tied to the level of convergence of binding energy distributions at critical intermediate states where bound and unbound states are at equilibrium, and where the rate of binding/unbinding conformational transitions is maximal. This finding mirrors similar observations in the context of order/disorder transitions as for example in protein folding. Insights concerning the physical mechanism of ligand binding and unbinding are obtained. Convergence for the largest FK506 ligand is achieved only after imposing strict conformational restraints, which however require accurate prior structural knowledge of the structure of the complex. The analytical AGBNP2 model is found to underestimate the magnitude of the hydrophobic driving force towards binding in these systems characterized by loosely packed protein-ligand binding interfaces. Rescoring of the binding energies using a numerical surface area model corrects this deficiency. This study illustrates the complex interplay between energy models, exploration of conformational space, and free energy estimators needed to obtain robust estimates from binding free energy calculations. PMID:22368530

  14. Young students's opinion about atomic energy

    International Nuclear Information System (INIS)

    Barroso, Belen; Martin, Hugo R.

    2006-01-01

    The present research work was performed in answer to a requirement that the CNEA-RC made to students of the Public and Institutional Relations Degree of the UES21, as a part of activities carried out in the framework of the Academic Cooperation Agreement between both institutions. In this case the students had to attend the Professional Practical course during the first semester of 2006, which included a short period in some company or organization. The Degree of Knowledge and the Opinion of the students from the Cycle of Specialization of the Province of Cordoba Educational System (ages between 15 and 17 years old), on the activities that are made in the site of CNEA-RC and DIOXITEK SA at Alta Cordoba neighborhood in Cordoba city has been analyzed. The same aspects were analyzed for Dioxitek's activities (equipment, raw materials, risk performance, etc.). Although the activities made at CNEA-RC involved during 2005/6 about 4000 students, due to the short time available for the practical part only the data of two schools located near the facilities were processed. Three aspects of the space conformed between the public and the general opinion were analyzed: the customs, the stereotypes and the attitudes of the people. These aspects were taken as the characteristics to describe to the opinions, their direction and intensity. The analysis was based on an exploratory investigation of type, characterized by its flexibility. The field work was of quantitative character. The surveys were structured with closed questions (categories of answers delimited previously on which the students must answer). For its design we used diverse sources of intelligence, such as pages of Internet, pamphlets, magazines, annual balances of the organizations, etc. The main results were the following: 1) The greater percentage of students declared to have little information on Atomic Energy. Only 4% declared to have abundant knowledge on the subject. 2) A 38% of the students indicated that

  15. Determination of Atomic Data Pertinent to the Fusion Energy Program

    International Nuclear Information System (INIS)

    Reader, J.

    2013-01-01

    We summarize progress that has been made on the determination of atomic data pertinent to the fusion energy program. Work is reported on the identification of spectral lines of impurity ions, spectroscopic data assessment and compilations, expansion and upgrade of the NIST atomic databases, collision and spectroscopy experiments with highly charged ions on EBIT, and atomic structure calculations and modeling of plasma spectra

  16. International Atomic Energy Agency activities in decommissioning

    International Nuclear Information System (INIS)

    Reisenweaver, D W.; )

    2005-01-01

    Full text: The International Atomic Energy Agency (IAEA) has been addressing the safety and technical issues of decommissioning for over 20 years, but their focus has been primarily on planning. Up to know, the activities have been on an ad hoc basis and sometimes, important issues have been missed. A new Action Plan on the Decommissioning of Nuclear Facilities has recently been approved by the Agency's board of Governors which will focus the Agency's efforts and ensure that our Member States' concerns are addressed. The new initiatives associated with this Action Plan will help ensure that decommissioning activities in the future are performed in a safe and coherent manner. The International Atomic Energy Agency (IAEA) has been preparing safety and technical documents concerning decommissioning since the mid-1980's. There have been over 30 documents prepared that provide safety requirements, guidance and supporting technical information. Many of these documents are over 10 years old and need updating. The main focus in the past has been on planning for decommissioning. During the past five years, a set of Safety Standards have been prepared and issued to provide safety requirements and guidance to Member States. However, decommissioning was never a real priority with the Agency, but was something that had to be addressed. To illustrate this point, the first requirements documents on decommissioning were issued as part of a Safety Requirements [1] on pre-disposal management of radioactive waste. It was felt that decommissioning did not deserve its own document because it was just part of the normal waste management process. The focus was mostly on waste management. The Agency has assisted Member States with the planning process for decommissioning. Most of these activities have been focused on nuclear power plants and research reactors. Now, support for the decommissioning of other types of facilities is being requested. The Agency is currently providing technical

  17. ENERGY RELAXATION OF HELIUM ATOMS IN ASTROPHYSICAL GASES

    International Nuclear Information System (INIS)

    Lewkow, N. R.; Kharchenko, V.; Zhang, P.

    2012-01-01

    We report accurate parameters describing energy relaxation of He atoms in atomic gases, important for astrophysics and atmospheric science. Collisional energy exchange between helium atoms and atomic constituents of the interstellar gas, heliosphere, and upper planetary atmosphere has been investigated. Energy transfer rates, number of collisions required for thermalization, energy distributions of recoil atoms, and other major parameters of energy relaxation for fast He atoms in thermal H, He, and O gases have been computed in a broad interval of energies from 10 meV to 10 keV. This energy interval is important for astrophysical applications involving the energy deposition of energetic atoms and ions into atmospheres of planets and exoplanets, atmospheric evolution, and analysis of non-equilibrium processes in the interstellar gas and heliosphere. Angular- and energy-dependent cross sections, required for an accurate description of the momentum-energy transfer, are obtained using ab initio interaction potentials and quantum mechanical calculations for scattering processes. Calculation methods used include partial wave analysis for collisional energies below 2 keV and the eikonal approximation at energies higher than 100 eV, keeping a significant energy region of overlap, 0.1-2 keV, between these two methods for their mutual verification. The partial wave method and the eikonal approximation excellently match results obtained with each other as well as experimental data, providing reliable cross sections in the astrophysically important interval of energies from 10 meV to 10 keV. Analytical formulae, interpolating obtained energy- and angular-dependent cross sections, are presented to simplify potential applications of the reported database. Thermalization of fast He atoms in the interstellar gas and energy relaxation of hot He and O atoms in the upper atmosphere of Mars are considered as illustrative examples of potential applications of the new database.

  18. Atom probe tomography simulations and density functional theory calculations of bonding energies in Cu3Au

    KAUST Repository

    Boll, Torben

    2012-10-01

    In this article the Cu-Au binding energy in Cu3Au is determined by comparing experimental atom probe tomography (APT) results to simulations. The resulting bonding energy is supported by density functional theory calculations. The APT simulations are based on the Müller-Schottky equation, which is modified to include different atomic neighborhoods and their characteristic bonds. The local environment is considered up to the fifth next nearest neighbors. To compare the experimental with simulated APT data, the AtomVicinity algorithm, which provides statistical information about the positions of the neighboring atoms, is applied. The quality of this information is influenced by the field evaporation behavior of the different species, which is connected to the bonding energies. © Microscopy Society of America 2012.

  19. Universal binding energy relation for cleaved and structurally relaxed surfaces

    International Nuclear Information System (INIS)

    Srirangarajan, Aarti; Datta, Aditi; Gandi, Appala Naidu; Ramamurty, U; Waghmare, U V

    2014-01-01

    The universal binding energy relation (UBER), derived earlier to describe the cohesion between two rigid atomic planes, does not accurately capture the cohesive properties when the cleaved surfaces are allowed to relax. We suggest a modified functional form of UBER that is analytical and at the same time accurately models the properties of surfaces relaxed during cleavage. We demonstrate the generality as well as the validity of this modified UBER through first-principles density functional theory calculations of cleavage in a number of crystal systems. Our results show that the total energies of all the relaxed surfaces lie on a single (universal) energy surface, that is given by the proposed functional form which contains an additional length-scale associated with structural relaxation. This functional form could be used in modelling the cohesive zones in crack growth simulation studies. We find that the cohesive law (stress–displacement relation) differs significantly in the case where cracked surfaces are allowed to relax, with lower peak stresses occurring at higher displacements. (paper)

  20. Universal binding energy relation for cleaved and structurally relaxed surfaces.

    Science.gov (United States)

    Srirangarajan, Aarti; Datta, Aditi; Gandi, Appala Naidu; Ramamurty, U; Waghmare, U V

    2014-02-05

    The universal binding energy relation (UBER), derived earlier to describe the cohesion between two rigid atomic planes, does not accurately capture the cohesive properties when the cleaved surfaces are allowed to relax. We suggest a modified functional form of UBER that is analytical and at the same time accurately models the properties of surfaces relaxed during cleavage. We demonstrate the generality as well as the validity of this modified UBER through first-principles density functional theory calculations of cleavage in a number of crystal systems. Our results show that the total energies of all the relaxed surfaces lie on a single (universal) energy surface, that is given by the proposed functional form which contains an additional length-scale associated with structural relaxation. This functional form could be used in modelling the cohesive zones in crack growth simulation studies. We find that the cohesive law (stress-displacement relation) differs significantly in the case where cracked surfaces are allowed to relax, with lower peak stresses occurring at higher displacements.

  1. Implicit ligand theory for relative binding free energies

    Science.gov (United States)

    Nguyen, Trung Hai; Minh, David D. L.

    2018-03-01

    Implicit ligand theory enables noncovalent binding free energies to be calculated based on an exponential average of the binding potential of mean force (BPMF)—the binding free energy between a flexible ligand and rigid receptor—over a precomputed ensemble of receptor configurations. In the original formalism, receptor configurations were drawn from or reweighted to the apo ensemble. Here we show that BPMFs averaged over a holo ensemble yield binding free energies relative to the reference ligand that specifies the ensemble. When using receptor snapshots from an alchemical simulation with a single ligand, the new statistical estimator outperforms the original.

  2. Atomic Energy Control Board vocabulary - preliminary edition

    Energy Technology Data Exchange (ETDEWEB)

    Nolet, D [Public Works and Government Services Canada, Montreal, PQ (Canada). Terminology and Documentation Directorate

    1995-09-01

    This preliminary edition was prepared at the Board`s request to help it establish a standardized terminology. It was produced by scanning the 99 French and English documents listed at the end of this Vocabulary. The documents include legislation concerning atomic energy and the transportation of radioactive materials, as well as the Board`s publications, such as the Consultative Documents, Regulatory Documents and Notices. The terms included from the following areas are: radiation protection, reactor technology, nuclear fuel cycle, radioactive material packaging and transportation, radioactive waste management, uranium mines, and medical and industrial applications of radioelements. Also included are the titles of publications and the names of organizations and units. The vocabulary contains 2,589 concepts, sometimes accompanied by definitions, contexts or usage examples. Where terms have been standardized by the Canadian Committee for the Standardization of Nuclear Terminology, this has been indicated. Where possible, we have verified the terms using the TERMIUM, the Government of Canada Linguistic Data Bank. (author).

  3. Pilot project of atomic energy technology record

    International Nuclear Information System (INIS)

    Song, K. C.; Kim, Y. I.; Kim, Y. G.

    2011-12-01

    Project of the Atomic Energy Technology Record is the project that summarizes and records in each category as a whole summary from the background to the performance at all fields of nuclear science technology which researched and developed at KAERI. This project includes Data and Document Management System(DDMS) that will be the system to collect, organize and preserve various records occurred in each research and development process. To achieve these goals, many problems should be solved to establish technology records process, such as issues about investigation status of technology records in KAERI, understanding and collection records, set-up project system and selection target field, definition standards and range of target records. This is a research report on the arrangement of research contents and results about pilot project which records whole nuclear technology researched and developed at KAERI in each category. Section 2 summarizes the overview of this pilot project and the current status of technology records in domestic and overseas, and from Section 3 to Section 6 summarize contents and results which performed in this project. Section 3 summarizes making TOC(Table of Content) and technology records, Section 4 summarizes sectoral templates, Section 5 summarizes writing detailed plan of technology records, and Section 6 summarizes Standard Document Numbering System(SDNS). Conclusions of this report are described in Section 7

  4. Binding free energy analysis of protein-protein docking model structures by evERdock.

    Science.gov (United States)

    Takemura, Kazuhiro; Matubayasi, Nobuyuki; Kitao, Akio

    2018-03-14

    To aid the evaluation of protein-protein complex model structures generated by protein docking prediction (decoys), we previously developed a method to calculate the binding free energies for complexes. The method combines a short (2 ns) all-atom molecular dynamics simulation with explicit solvent and solution theory in the energy representation (ER). We showed that this method successfully selected structures similar to the native complex structure (near-native decoys) as the lowest binding free energy structures. In our current work, we applied this method (evERdock) to 100 or 300 model structures of four protein-protein complexes. The crystal structures and the near-native decoys showed the lowest binding free energy of all the examined structures, indicating that evERdock can successfully evaluate decoys. Several decoys that show low interface root-mean-square distance but relatively high binding free energy were also identified. Analysis of the fraction of native contacts, hydrogen bonds, and salt bridges at the protein-protein interface indicated that these decoys were insufficiently optimized at the interface. After optimizing the interactions around the interface by including interfacial water molecules, the binding free energies of these decoys were improved. We also investigated the effect of solute entropy on binding free energy and found that consideration of the entropy term does not necessarily improve the evaluations of decoys using the normal model analysis for entropy calculation.

  5. Perturbation method for calculating impurity binding energy in an ...

    Indian Academy of Sciences (India)

    Nilanjan Sil

    2017-12-18

    Dec 18, 2017 ... Abstract. In the present paper, we have studied the binding energy of the shallow donor hydrogenic impurity, which is confined in an inhomogeneous cylindrical quantum dot (CQD) of GaAs-AlxGa1−xAs. Perturbation method is used to calculate the binding energy within the framework of effective mass ...

  6. Extrapolations of nuclear binding energies from new linear mass relations

    DEFF Research Database (Denmark)

    Hove, D.; Jensen, A. S.; Riisager, K.

    2013-01-01

    We present a method to extrapolate nuclear binding energies from known values for neighboring nuclei. We select four specific mass relations constructed to eliminate smooth variation of the binding energy as function nucleon numbers. The fast odd-even variations are avoided by comparing nuclei...

  7. Solar and Geothermal Energy: New Competition for the Atom

    Science.gov (United States)

    Carter, Luther J.

    1974-01-01

    Describes new emphasis on research into solar and geothermal energy resources by governmental action and recent legislation and the decreased emphasis on atomic power in supplementing current energy shortages. (BR)

  8. Books on Atomic Energy for Adults and Children

    Energy Technology Data Exchange (ETDEWEB)

    None

    1969-01-01

    This booklet contains two lists of atomic energy books, one for students and one for adults. The student list has grade annotations. The lists are not all-inclusive but comprise selected basic books on atomic energy and closely related subjects.

  9. On promotion of base technologies of atomic energy

    International Nuclear Information System (INIS)

    1988-01-01

    In the long term plan of atomic energy development and utilization decided in June, 1987 by the Atomic Energy Commission, it was recognized that hereafter, the opening-up of the new potential that atomic energy possesses should be aimed at, and the policy was shown so that the research and development hereafter place emphasis on the creative and innovative region which causes large technical innovation, by which the spreading effect to general science and technology can be expected, and the development of the base technologies that connect the basic research and project development is promoted. The trend of atomic energy development so far, the change of the situation surrounding atomic energy, the direction of technical development of atomic energy hereafter and the base technologies are discussed. The concept of the technical development of materilas, artificial intelligence, lasers, and the evaluation and reduction of radiation risks used for atomic energy is described. As the development plan of atomic energy base technologies, the subjects of technical development, the future image of technical development, the efficient promotion of the development and so on are shown. (Kato, I.)

  10. The law for the Japan Atomic Energy Research Institute

    International Nuclear Information System (INIS)

    1977-01-01

    The law establishes the Japan Atomic Energy Research Institute in accordance with the Basic Act on Atomic Energy as a government corporation for the purpose of promoting R and D and utilizations of atomic energy (first chapter). The second chapter concerns the directors, advisers and personnel of the institute, namely a chairman of the board of directors, a vice-chairman, directors not more than seven persons, and auditors not more than two persons. The chairman represents and supervises the intitute, whom the prime minister appoints with the agreement of Atomic Energy Commission. The vice-chairman and other directors are nominated by the chairman with the approval of the prime minister, while the auditors are appointed by the prime minister with the advice of the Atomic Energy Commission. Their terms of office are 4 years for directors and 2 years for auditors. The third chapter defines the scope of activities of the institute as follows: basic and applied researches on atomic energy; design, construction and operation of nuclear reactors; training of researchers and technicians; and import, production and distribution of radioisotopes. Those activities should be done in accordance with the basic development and utilization plans of atomic energy established by the prime minister with the determination of Atomic Energy Commission. The fourth chapter provides for the finance and accounting of the institute, and the fifth chapter requires the supervision of the institute by the prime minister. (Matsushima, A.)

  11. Eleventh Arab Conference on the Peaceful Uses of Atomic Energy

    International Nuclear Information System (INIS)

    Nasr, N.

    2012-01-01

    The Arab conference on the peaceful uses of atomic energy is an important station where Arab researchers and scientists meet to present the results of their scientific and applied research activities, to exchange views, experiences and knowledge and to strengthen the bonds of cooperation among them. Under this framework, the Arab Atomic Energy Agency organized the eleventh Arab conference on the peaceful uses of atomic energy in cooperation with the Ministry of Science and Communications of the Republic of Sudan and the Sudan Atomic Energy Commission in Khartoum city during the period of 23-27 December 2012. The sessions of the conference included scientific papers, in addition to specialized lectures on topics of particular importance in the field of peaceful applications of atomic energy followed by panel discussions.

  12. Positronium-alkali atom scattering at medium energies

    International Nuclear Information System (INIS)

    Chakraborty, Ajoy; Basu, Arindam; Sarkar, Nirmal K; Sinha, Prabal K

    2004-01-01

    We investigate the scattering of orthopositronium (o-Ps) atom off different atomic alkali targets (Na to Cs) at low and medium energies (up to 120 eV). Projectile-elastic and target-elastic close-coupling models have been employed to investigate the systems in addition to the static-exchange model. Elastic, excitation and total cross sections have been reported for all four systems. The magnitude of the alkali excitation cross section increases with increasing atomic number of the target atom while the position of the peak value shifts towards lower incident energies. The magnitudes of the Ps excitation and ionization cross sections increase steadily with atomic number with no change in the peak position. The reported results show regular behaviour with increasing atomic number of the target atom. Scattering parameters for the Ps-Rb and Ps-Cs systems are being reported for the first time

  13. K- nuclear states: Binding energies and widths

    Czech Academy of Sciences Publication Activity Database

    Hrtánková, Jaroslava; Mareš, Jiří

    2017-01-01

    Roč. 96, č. 1 (2017), č. článku 015205. ISSN 2469-9985 R&D Projects: GA ČR(CZ) GA15-04301S Institutional support: RVO:61389005 Keywords : K- nuclear * kaonic * states Subject RIV: BE - Theoretical Physics OBOR OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) Impact factor: 3.820, year: 2016

  14. Atomic energy and science disclosure in Cordoba

    International Nuclear Information System (INIS)

    Martin, Hugo R.

    2011-01-01

    In September 2009, considering the existing interest in public communication of scientific activities that are developed locally, a group of researchers and communicators from Córdoba, decided to form the Network of Outreach of Córdoba. Its stated objectives of the Constitutive Act are presented in this paper along with the main activities undertaken to date and plans for the future. Since that time, the Management of Institutional Relations of the CNEA in Córdoba became involved in public circulation of scientific knowledge, in what has proven to be a framework that ensures an adequate level of debate to present nuclear national activities. This will involve collaborative efforts with professional institutions involved in research, teaching and communicating science. The main objective was to encourage the transfer of knowledge to optimize available resources, improving the methodological approaches and generating creative products tailored to regional needs, in order to promote the democratization of science and nuclear technology. This paper consists of two parts. On the one hand describes the activities of the Network during the year 2011 shows results with particular emphasis on topics related to atomic energy, and secondly, shows the desirability of promoting such activities in the CNEA. Among the main actions considered, highlighting the institutional participation in the official Ministry of Science and Technology Fair participation in Science and Technology Provincial Cordoba 2011, issue of the radio program 'Green Light: Science and technology everyday life' by National Technological University Radio and a network of forty provincial stations, and active participation in the Course of Specialization in Public Communication of Science and Scientific Journalism, organized by the School of Information Sciences and the Faculty of Mathematics, Physics and Astronomy, National University of Cordoba, among others. (author) [es

  15. Annual report 2003[International Atomic Energy Agency

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    The Annual Report reviews the results of the Agency's programme according to the three 'pillars' of technology, safety and verification. The main part of the report, starting on page 9, generally follows the programme structure as it applied in 2003. The introductory chapter, seeks to provide a thematic analysis, based on the three pillars, of the Agency's activities within the overall context of notable developments during the year. Additional information on specific issues can be found in the latest editions of the Agency's Nuclear Safety Review, Nuclear Technology Review and Technical Co-operation Report. This material is also available on the Agency's WorldAtom web site (http://www.iaea.org/Worldatom/Documents/Anrep/Anrep2003/). All sums of money are expressed in United States dollars. The designations employed and the presentation of material in this document do not imply the expression of any opinion whatsoever on the part of the Secretariat concerning the legal status of any country or territory or of its authorities, or concerning the delimitation of its frontiers. The topics covered in the chapter related to Technology are: Nuclear Power; Nuclear Fuel Cycle and Material Technologies; Analysis for Sustainable Energy Development; Nuclear Science; Food and Agriculture; Human Health; Water Resources; Protection of the Marine and Terrestrial Environments; Physical and Chemical Applications. Topics related to safety discussed in this report are: Safety of Nuclear Installations; Radiation Safety; Management of Radioactive Waste; Security of Material. Topics related to Verification are Safeguards and Verification in Iraq Pursuant to UNSC Resolutions. A separate chapter is devoted to Management of Technical Cooperation for Development.

  16. Effect of inelastic energy losses on development of atom-atom collision cascades

    International Nuclear Information System (INIS)

    Marinyuk, V.V.; Remizovich, V.S.

    2001-01-01

    The problem of influence of inelastic energy losses (ionization braking) of particles on the development of atom-atom collision cascades in infinite medium was studied theoretically. Main attention was paid to study of angular and energy distributions of primary ions and cascade atoms in the presence of braking. Analytical calculations were made in the assumption that single scattering of particles occurs by solid balls law, while the value of electron braking ability of a medium is determined by the Lindhard formula. It is shown that account of braking (directly when solving the Boltzmann transport equation) changes in principle the previously obtained angular and energy spectra of ions and cascade atoms. Moreover, it is the braking that is the determining factor responsible for anisotropy of angular distributions of low-energy primary ions and cascade atoms [ru

  17. On binding energy of trions in bulk materials

    Science.gov (United States)

    Filikhin, Igor; Kezerashvili, Roman Ya.; Vlahovic, Branislav

    2018-03-01

    We study the negatively T- and positively T+ charged trions in bulk materials in the effective mass approximation within the framework of a potential model. The binding energies of trions in various semiconductors are calculated by employing Faddeev equation in configuration space. Results of calculations of the binding energies for T- are consistent with previous computational studies and are in reasonable agreement with experimental measurements, while the T+ is unbound for all considered cases. The mechanism of formation of the binding energy of trions is analyzed by comparing contributions of a mass-polarization term related to kinetic energy operators and a term related to the Coulomb repulsion of identical particles.

  18. Ion Binding Energies Determining Functional Transport of ClC Proteins

    Science.gov (United States)

    Yu, Tao; Guo, Xu; Zou, Xian-Wu; Sang, Jian-Ping

    2014-06-01

    The ClC-type proteins, a large family of chloride transport proteins ubiquitously expressed in biological organisms, have been extensively studied for decades. Biological function of ClC proteins can be reflected by analyzing the binding situation of Cl- ions. We investigate ion binding properties of ClC-ec1 protein with the atomic molecular dynamics simulation approach. The calculated electrostatic binding energy results indicate that Cl- at the central binding site Scen has more binding stability than the internal binding site Sint. Quantitative comparison between the latest experimental heat release data isothermal titration calorimetry (ITC) and our calculated results demonstrates that chloride ions prefer to bind at Scen than Sint in the wild-type ClC-ec1 structure and prefer to bind at Sext and Scen than Sint in mutant E148A/E148Q structures. Even though the chloride ions make less contribution to heat release when binding to Sint and are relatively unstable in the Cl- pathway, they are still part contributors for the Cl- functional transport. This work provides a guide rule to estimate the importance of Cl- at the binding sites and how chloride ions have influences on the function of ClC proteins.

  19. Multiple binding modes of ibuprofen in human serum albumin identified by absolute binding free energy calculations

    KAUST Repository

    Evoli, Stefania

    2016-11-10

    Human serum albumin possesses multiple binding sites and transports a wide range of ligands that include the anti-inflammatory drug ibuprofen. A complete map of the binding sites of ibuprofen in albumin is difficult to obtain in traditional experiments, because of the structural adaptability of this protein in accommodating small ligands. In this work, we provide a set of predictions covering the geometry, affinity of binding and protonation state for the pharmaceutically most active form (S-isomer) of ibuprofen to albumin, by using absolute binding free energy calculations in combination with classical molecular dynamics (MD) simulations and molecular docking. The most favorable binding modes correctly reproduce several experimentally identified binding locations, which include the two Sudlow\\'s drug sites (DS2 and DS1) and the fatty acid binding sites 6 and 2 (FA6 and FA2). Previously unknown details of the binding conformations were revealed for some of them, and formerly undetected binding modes were found in other protein sites. The calculated binding affinities exhibit trends which seem to agree with the available experimental data, and drastically degrade when the ligand is modeled in a protonated (neutral) state, indicating that ibuprofen associates with albumin preferentially in its charged form. These findings provide a detailed description of the binding of ibuprofen, help to explain a wide range of results reported in the literature in the last decades, and demonstrate the possibility of using simulation methods to predict ligand binding to albumin.

  20. On promotion of base technologies of atomic energy. Aiming at breakthrough in atomic energy technologies in 21st century

    Energy Technology Data Exchange (ETDEWEB)

    1988-09-01

    In the long term plan of atomic energy development and utilization decided in June, 1987 by the Atomic Energy Commission, it was recognized that hereafter, the opening-up of the new potential that atomic energy possesses should be aimed at, and the policy was shown so that the research and development hereafter place emphasis on the creative and innovative region which causes large technical innovation, by which the spreading effect to general science and technology can be expected, and the development of the base technologies that connect the basic research and project development is promoted. The trend of atomic energy development so far, the change of the situation surrounding atomic energy, the direction of technical development of atomic energy hereafter and the base technologies are discussed. The concept of the technical development of materilas, artificial intelligence, lasers, and the evaluation and reduction of radiation risks used for atomic energy is described. As the development plan of atomic energy base technologies, the subjects of technical development, the future image of technical development, the efficient promotion of the development and so on are shown. (Kato, I.).

  1. Structure-function relationships of Na+, K+, ATP, or Mg2+ binding and energy transduction in Na,K-ATPase

    DEFF Research Database (Denmark)

    Jorgensen, Peter L.; Pedersen, Per Amstrup

    2000-01-01

    Na,K-ATPase; Mutagenesis; Na+ binding; K+ binding; Tl+ binding; Mg2+ binding; ATP binding; Cation binding site; Energy transduction......Na,K-ATPase; Mutagenesis; Na+ binding; K+ binding; Tl+ binding; Mg2+ binding; ATP binding; Cation binding site; Energy transduction...

  2. Long term plan of atomic energy development and utilization

    International Nuclear Information System (INIS)

    1982-01-01

    The atomic energy utilization and development in Japan have progressed remarkably, and already nuclear power generation has borne an important part in electric power supply, while radiation has been utilized in the fields of industry, agriculture, medicine and so on. Now, atomic energy is indispensable for national life and industrial activity. The former long term plan was decided in September, 1978, and the new long term plan should be established since the situation has changed largely. The energy substituting for petroleum has been demanded, and the expectation to nuclear power generation has heightened because it enables stable and economical power supply. The independently developed technology related to atomic energy must be put in practical use. The peaceful utilization of atomic energy must be promoted, while contributing to the nuclear non-proliferation policy. The Atomic Energy Commission of Japan decided the new long term plan to clearly show the outline of the important measures related to atomic energy development and utilization in 10 years hereafter, and the method of its promotion. The basic concept of atomic energy development and utilization, the long term prospect and the concept on the promotion, the method of promoting the development and utilization, and the problems of funds, engineers and location are described. (kako, I.)

  3. Radial behavior of the average local ionization energies of atoms

    International Nuclear Information System (INIS)

    Politzer, P.; Murray, J.S.; Grice, M.E.; Brinck, T.; Ranganathan, S.

    1991-01-01

    The radial behavior of the average local ionization energy bar I(r) has been investigated for the atoms He--Kr, using ab initio Hartree--Fock atomic wave functions. bar I(r) is found to decrease in a stepwise manner with the inflection points serving effectively to define boundaries between electronic shells. There is a good inverse correlation between polarizability and the ionization energy in the outermost region of the atom, suggesting that bar I(r) may be a meaningful measure of local polarizabilities in atoms and molecules

  4. Present status and future perspective of development of atomic energy

    International Nuclear Information System (INIS)

    Takuma, Masao

    1990-01-01

    The last year was the 50th year from the discovery of the nuclear fission of uranium in 1939. The utilization of atomic energy made the unfortunate start as atomic bombs, but after the 'Atoms for Peace' declaration of President Eisenhauer, it has become to contribute to the development of mankind as nuclear power generation and radiation utilization. In Japan, the Atomic Energy Act was instituted in 1955, and the utilization of atomic energy has been eagerly promoted. As to nuclear power generation, as of the end of June, 1989, 423 power plants were in operation in the world, which generated 333 million kW, equivalent to 17 % of the total generated electric power. The nuclear power plants under construction and at planning stage were 199 with 190 million kW capacity, in this way, the development is advanced actively. At present in Japan, 38 nuclear power plants are in operation, generating 29.46 million kW, which has reached 30 % of the total generated electric power. The social environment surrounding atomic energy and the basic way of thinking on atomic energy development are discussed. The demand and supply of electric power in 21st century and atomic energy, and the policy of electric power companies to cope with it are explained. (K.I.)

  5. Course of atomic energy safety during ten years

    International Nuclear Information System (INIS)

    1988-10-01

    The Nuclear Safety Commission started in the autumn of 1978 as the result of reexamining the system of atomic energy safety regulation in order to deal with the national criticism against the promotion of atomic energy that arose after the radiation leak accident on the nuclear ship 'Mutsu' 1974. For the development of atomic energy, it is indispensable to obtain the understanding and trust of nation on the safety of atomic energy as clearly shown in the Atomic Energy Act and in the background of founding and the policy of hte Nuclear Safety Commission. The Nuclear Safety Commission has carried out the safety examination for the permission of installing nuclear facilities, the decision of guidelines for the examination, the holding of public hearing, the promotion of safety research and so on. In this book, the reform of the system of atomic energy safety regulation, the countermeasures after TMI accident, the public hearing and others taking root, the further heightening of reliability of LMRs, efforts for operation managment and environment safety, the substantiating of the research on atomic energy safety, the diversification of the objects of safety regulation, the treatment and disposal of radioactive waste, the countermeasures after the chernobyl-4 accident and the positive promotion of international cooperation are described. (Kako, I.)

  6. Using the fast fourier transform in binding free energy calculations.

    Science.gov (United States)

    Nguyen, Trung Hai; Zhou, Huan-Xiang; Minh, David D L

    2018-04-30

    According to implicit ligand theory, the standard binding free energy is an exponential average of the binding potential of mean force (BPMF), an exponential average of the interaction energy between the unbound ligand ensemble and a rigid receptor. Here, we use the fast Fourier transform (FFT) to efficiently evaluate BPMFs by calculating interaction energies when rigid ligand configurations from the unbound ensemble are discretely translated across rigid receptor conformations. Results for standard binding free energies between T4 lysozyme and 141 small organic molecules are in good agreement with previous alchemical calculations based on (1) a flexible complex ( R≈0.9 for 24 systems) and (2) flexible ligand with multiple rigid receptor configurations ( R≈0.8 for 141 systems). While the FFT is routinely used for molecular docking, to our knowledge this is the first time that the algorithm has been used for rigorous binding free energy calculations. © 2017 Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

  7. The effect of cigarette smoke extract on thrombomodulin-thrombin binding: an atomic force microscopy study.

    Science.gov (United States)

    Wei, Yujie; Zhang, Xuejie; Xu, Li; Yi, Shaoqiong; Li, Yi; Fang, Xiaohong; Liu, Huiliang

    2012-10-01

    Cigarette smoking is a well-known risk factor for cardiovascular disease. Smoking can cause vascular endothelial dysfunction and consequently trigger haemostatic activation and thrombosis. However, the mechanism of how smoking promotes thrombosis is not fully understood. Thrombosis is associated with the imbalance of the coagulant system due to endothelial dysfunction. As a vital anticoagulation cofactor, thrombomodulin (TM) located on the endothelial cell surface is able to regulate intravascular coagulation by binding to thrombin, and the binding results in thrombosis inhibition. This work focused on the effects of cigarette smoke extract (CSE) on TM-thrombin binding by atomic force microscopy (AFM) based single-molecule force spectroscopy. The results from both in vitro and live-cell experiments indicated that CSE could notably reduce the binding probability of TM and thrombin. This study provided a new approach and new evidence for studying the mechanism of thrombosis triggered by cigarette smoking.

  8. Recoil saturation of the self-energy in atomic systems

    International Nuclear Information System (INIS)

    Manson, J.R.; Ritchie, R.H.

    1988-01-01

    Within the framework of the general self-energy problem for the interaction of a projectile with a many-body system, we consider the dispersion force between two atoms or between a charge and an atom. Since the Born-Oppenheimer approximation is not made, this is a useful approach for exhibiting non-adiabatic effects. We find compact expressions in terms of matrix elements of operators in the atomic displacement which are not limited by multipole expansions. 7 refs

  9. Kinetic-energy density functional: Atoms and shell structure

    International Nuclear Information System (INIS)

    Garcia-Gonzalez, P.; Alvarellos, J.E.; Chacon, E.

    1996-01-01

    We present a nonlocal kinetic-energy functional which includes an anisotropic average of the density through a symmetrization procedure. This functional allows a better description of the nonlocal effects of the electron system. The main consequence of the symmetrization is the appearance of a clear shell structure in the atomic density profiles, obtained after the minimization of the total energy. Although previous results with some of the nonlocal kinetic functionals have given incipient structures for heavy atoms, only our functional shows a clear shell structure for most of the atoms. The atomic total energies have a good agreement with the exact calculations. Discussion of the chemical potential and the first ionization potential in atoms is included. The functional is also extended to spin-polarized systems. copyright 1996 The American Physical Society

  10. Predicting accurate absolute binding energies in aqueous solution

    DEFF Research Database (Denmark)

    Jensen, Jan Halborg

    2015-01-01

    Recent predictions of absolute binding free energies of host-guest complexes in aqueous solution using electronic structure theory have been encouraging for some systems, while other systems remain problematic. In this paper I summarize some of the many factors that could easily contribute 1-3 kcal......-represented by continuum models. While I focus on binding free energies in aqueous solution the approach also applies (with minor adjustments) to any free energy difference such as conformational or reaction free energy differences or activation free energies in any solvent....

  11. Is atomic energy different from a nucleus?

    International Nuclear Information System (INIS)

    Lee, Sun Young

    1995-07-01

    This book describes of two faces of nuclear energy : the secret of a nuclear, the history of nuclear energy : the scientists with a nuclear, the nuclear energy generation : the third disapprobation, a nuclear weapon : Choice of fear, the Korean peninsula and a nuclear and nuclear energy and utilization in peace. It consists of 31 questions and the answers of the questions about nuclear energy and nucleus.

  12. Streaming current of a rotary atomizer for energy harvesting

    NARCIS (Netherlands)

    Nguyen, Trieu; de Boer, Hans L.; Tran, T.; van den Berg, Albert; Eijkel, Jan C.T.; Zengerle, R.

    2013-01-01

    We present the experimental results of an energy conversion system based on a rotary atomizer and the streaming current phenomenon. The advantage of using a rotary atomizer instead of a channel or membrane micropore as in conventional pressure-driven approached is that the centrifugal force exerted

  13. Quantum yield and translational energy of hydrogen atoms

    Indian Academy of Sciences (India)

    TECS

    erage kinetic energy of H atoms calculated from Doppler profiles was found to be ET(lab) = (50 ± 3) kJ/mol. The ... in this wavelength range H atoms are produced by ... tral hydrogen. 1,9 ... a spectral window of molecular oxygen, solar radia-.

  14. Present problems with atomic energy laws and regulations. 2. ed.

    International Nuclear Information System (INIS)

    Bluemel, W.

    1993-01-01

    The report includes two speeches held by the author on the 3rd Japanese-German Atomic Law Symposion in Tokio on 5-7 Oct. 1992. The titles are: 1) Recent developments in the German Laws and regulations ruling atomic energy; 2) Legal aspects of stopping and eliminating nuclear plants in Germany. Both speeches were translated into Japanese. (HP) [de

  15. The International Atomic Energy Agency Nuclear Security Education Strategies

    International Nuclear Information System (INIS)

    BRAUNEGGER-GUELICH, A.; RUKHLO, V.; GREGORIC, M.; COLGAN, P.

    2011-01-01

    The threat of nuclear terrorism has not diminished. In response to the concerns of States, an international nuclear security framework has emerged through the establishment of a number of legally binding and non-binding international instruments which obligates or commits States to carry out a number of actions to protect against nuclear terrorism. In this context, the need for human resource development programmes in nuclear security was underscored at several International Atomic Energy Agency (IAEA) General Conferences and Board of Governors' Meetings. In the pursuit of this need, the IAEA provides a comprehensive nuclear security training programme to States on a regular basis, and has developed a concept that seeks to effectively pass ownership of nuclear security knowledge and skills to States through the establishment of a Nuclear Security Support Centre. In addition, the IAEA has developed a technical guidance titled IAEA Nuclear Security Series No. 12 - Educational Programme in Nuclear Security that consists of a model of a Master of Science (M.Sc.) and assists educational institutions to provide nuclear security education. The article sets out IAEA efforts in the area of nuclear security training and education, including the assistance to States for establishing a Nuclear Security Support Centre. It underlines the objective and content of the IAEA Nuclear Security Series No. 12, discusses different concepts on how to establish nuclear security at universities and, emphasizes on the IAEA efforts to assist educational and research institutions, and other stake holders to enhance global nuclear security by developing, sharing and promoting excellence in nuclear security education. (author)

  16. White paper on atomic energy in 2003

    International Nuclear Information System (INIS)

    2003-12-01

    This white paper explains the state of nuclear energy from June 19, 1998, to September, 2003. It consists of text and material. The text contains two chapters, of which the first chapter includes nuclear power plant, recovery of reliance, nuclear fuel cycle, development of research, international trend and evaluation of policy, and the second chapter nuclear energy administration of Japan, consensus of citizen and nuclear energy, nuclear power plant and nuclear fuel cycle, various kinds of development of nuclear energy technologies, radiation use for national life, consensus of international society and nuclear energy and propulsive basis of research, development and use of nuclear energy. Material collects determination of committee, budget on nuclear energy and chronological tables. This paper contains only the fundamental items related to the nuclear energy policy except nuclear energy safety. (S.Y.)

  17. Electron-atom scattering at intermediate energies

    International Nuclear Information System (INIS)

    Kingston, A.E.; Walters, H.R.J.

    1982-01-01

    The problems of intermediate energy scattering are approached from the low and high energy ends. At low intermediate energies difficulties associated with the use of pseudostates and correlation terms are discussed, special consideration being given to nonphysical pseudoresonances. Perturbation methods appropriate to high intermediate energies are described and attempts to extend these high energy approximations down to low intermediate energies are studied. It is shown how the importance of electron exchange effects develops with decreasing energy. The problem of assessing the 'effective completeness' of pseudostate sets at intermediate energies is mentioned and an instructive analysis of a 2p pseudostate approximation to elastic e - -H scattering is given. It is suggested that at low energies the Pauli Exclusion Principle can act to hide short range defects in pseudostate approximations. (author)

  18. Structure of Alzheimer’s disease amyloid precursor protein copper-binding domain at atomic resolution

    Energy Technology Data Exchange (ETDEWEB)

    Kong, Geoffrey Kwai-Wai; Adams, Julian J. [Biota Structural Biology Laboratory, St Vincent’s Institute, 9 Princes Street, Fitzroy, Victoria 3065 (Australia); Cappai, Roberto [Department of Pathology and Centre for Neuroscience, The University of Melbourne, Victoria 3010 (Australia); The Mental Health Research Institute of Victoria, Parkville, Victoria 3052 (Australia); Bio21 Institute, The University of Melbourne, Victoria 3010 (Australia); Parker, Michael W., E-mail: mparker@svi.edu.au [Biota Structural Biology Laboratory, St Vincent’s Institute, 9 Princes Street, Fitzroy, Victoria 3065 (Australia); Bio21 Institute, The University of Melbourne, Victoria 3010 (Australia)

    2007-10-01

    An atomic resolution structure of the copper-binding domain of the Alzheimer’s disease amyloid precursor protein is presented. Amyloid precursor protein (APP) plays a central role in the pathogenesis of Alzheimer’s disease, as its cleavage generates the Aβ peptide that is toxic to cells. APP is able to bind Cu{sup 2+} and reduce it to Cu{sup +} through its copper-binding domain (CuBD). The interaction between Cu{sup 2+} and APP leads to a decrease in Aβ production and to alleviation of the symptoms of the disease in mouse models. Structural studies of CuBD have been undertaken in order to better understand the mechanism behind the process. Here, the crystal structure of CuBD in the metal-free form determined to ultrahigh resolution (0.85 Å) is reported. The structure shows that the copper-binding residues of CuBD are rather rigid but that Met170, which is thought to be the electron source for Cu{sup 2+} reduction, adopts two different side-chain conformations. These observations shed light on the copper-binding and redox mechanisms of CuBD. The structure of CuBD at atomic resolution provides an accurate framework for structure-based design of molecules that will deplete Aβ production.

  19. Energy dependence of the ionization of highly excited atoms by collisions with excited atoms

    International Nuclear Information System (INIS)

    Shirai, T.; Nakai, Y.; Nakamura, H.

    1979-01-01

    Approximate analytical expressions are derived for the ionization cross sections in the high- and low-collision-energy limits using the improved impulse approximation based on the assumption that the electron-atom inelastic-scattering amplitude is a function only of the momentum transfer. Both cases of simultaneous excitation and de-excitation of one of the atoms are discussed. The formulas are applied to the collisions between two excited hydrogen atoms and are found very useful for estimating the cross sections in the wide range of collisions energies

  20. Neck of public acceptance of atomic energy in Japan

    International Nuclear Information System (INIS)

    Tawara, Soichiro.

    1978-01-01

    Discussion is lacking concerning the public acceptance of atomic energy in Japan. In case of the atomic powered ship Mutsu, an opponent says that the ship carries an atomic bomb, but a member of a support group says that the ship emits soft radiation like a hot spring. This is an example of discussion, and most of discussions are made under the political interest, instead of on the scientific base. In Japan, preparatory negotiations are required in advance to the decision making meeting in most cases. Therefore, most of substantial discussions are not public. Engineers in the nuclear industry can hardly express their opinion concerning the development of atomic energy. Most of the data for discussions are not original, but foreign data. Reasons for the development of atomic energy change case by case. It is necessary to consider that people will decide their opinion according to whether the responsible person is reliable or not. Some people oppose to atomic energy to find a new sense of value. Now, all people are requested to think and discuss the problem of atomic energy calmly. (Kato, T.)

  1. Atomic Energy Amendment Act 1987 - No 5 of 1987

    International Nuclear Information System (INIS)

    1987-01-01

    This Act modifies substantially the Atomic Energy Act 1953 as already amended. It repeals almost all of the existing Atomic Energy Act, including the provisions establishing the Australian Atomic Energy Commission and the security provisions. A new authority is created under separate legislation to replace the Commission: the Australian Nuclear Science and Technology Organization. The only parts of the Act which remain are the sections covering the authorization of the Ranger Project and the Commonwealth title to uranium in the Northern Territory; and the requirement for reporting of discoveries of prescribed substances (uranium, thorium, i.e. any substance which may be used for production of atomic energy) and information on their production. Certain definitions have also been kept. (NEA) [fr

  2. Managing public perceptions about atomic energy in India

    International Nuclear Information System (INIS)

    Shankar, Ravi; Malhotra, S.K.

    2009-01-01

    Dr. Homi Jehangir Bhabha, in his presidential address at the first International Conference on the Peaceful Uses of Atomic Energy in Geneva in August 1955 had said 'Acquisition by man of the knowledge of how to release and use atomic energy must be recognized as the third epoch of human history'. Indeed during the last six decades, Atomic Energy has touched practically all aspects of human life and has registered its presence in almost every part of the globe. In India too, the Department of Atomic Energy set up in 1954, has been successfully pursuing a programme with a mandate to generate electricity, produce radioisotopes and develop radiation technologies with application in the areas of healthcare, food security, industry, water management, environment, R and D etc. Besides, DAE is also engaged in developing advanced technologies such as lasers, accelerator, robotics, fast computing and biosciences

  3. Atomic Energy of Canada Limited annual report 1987-88

    International Nuclear Information System (INIS)

    1988-01-01

    The annual report of Atomic Energy of Canada Limited for the fiscal year ended March 31, 1988 covers: Research Company; CANDU Operations; Radiochemical Company; Medical Products Division; The Future; Financial Sections; Board of Directors and Officers; and AECL locations

  4. Atomic Energy Authority Act, No. 19 of 1969

    International Nuclear Information System (INIS)

    1969-01-01

    Act to provide for the establishment of an Atomic Energy Authority and an advisory committee to advise such authority, to specify the power, duties, rights and functions of such authority, and to provide for matters connected therewith or incidental thereto

  5. Ghana Atomic Energy Commission : at a glance. 3. ed.

    International Nuclear Information System (INIS)

    1998-07-01

    The brochure provides a brief history of the establishment and functions of the Ghana Atomic Energy Commission. It also provides information on the structure, facilities and activities of existing research institutes and centres

  6. Annual Report 2002 of the Institute of Atomic Energy

    International Nuclear Information System (INIS)

    2003-06-01

    Annual Report of the Institute of Atomic Energy described the results of the research works carried out at the Institute in 2002 year. The Report contains the information on technical and research studies developed by all Institute Departments and Laboratories

  7. The future of atomic energy; TOPICAL

    International Nuclear Information System (INIS)

    Fermi, E.

    1946-01-01

    There is definitely a technical possibility that atomic power may gradually develop into one of the principal sources of useful power. If this expectation will prove correct, great advantages can be expected to come from the fact that the weight of the fuel is almost negligible. This feature may be particularly valuable for making power available to regions of difficult access and far from deposits of coal. It also may prove a great asset in mobile power units for example in a power plant for ship propulsion. On the negative side there are some technical limitations to be applicability of atomic power of which perhaps the most serious is the impossibility of constructing light power units; also there will be some peculiar difficulties in operating atomic plants, as for example the necessity of handling highly radioactive substances which will necessitate, at least for some considerable period, the use of specially skilled personnel for the operation. But the chief obstacle in the way of developing atomic power will be the difficulty of organizing a large scale industrial development in an internationally safe way. This presents actually problems much more difficult to solve than any of the technical developments that are necessary, It will require an unusual amount of statesmanship to balance properly the necessity of allaying the international suspicion that arises from withholding technical secrets against the obvious danger of dumping the details of the procedures for an extremely dangerous new method of warfare on a world that may not yet be prepared to renounce war. Furthermore, the proper balance should be found in the relatively short time that will elapse before the 'secrets' will naturally become open knowledge by rediscovery on part of the scientists and engineers of other countries

  8. About connection between atomic and hydrogen energy power

    International Nuclear Information System (INIS)

    Avdeeva, M.Zh.; Vecher, A.A.; Pan'kov, V.V.

    2008-01-01

    Possible interaction between atomic and hydrogen energy power has been discussed. The analysis of the result held shows that the electrical energy produced by the atomic reactor during the of-load hours can be involved into the process of obtaining hydrogen by electrolysis. In order to optimize the transportation and storage of hydrogen it is proposed to convert it into ammonia. The direct uses of ammonia as a fuel into the internal combustion engine and fuel cells are examined. (authors)

  9. Atom-surface interaction: Zero-point energy formalism

    International Nuclear Information System (INIS)

    Paranjape, V.V.

    1985-01-01

    The interaction energy between an atom and a surface formed by a polar medium is derived with use of a new approach based on the zero-point energy formalism. It is shown that the energy depends on the separation Z between the atom and the surface. With increasing Z, the energy decreases according to 1/Z 3 , while with decreasing Z the energy saturates to a finite value. It is also shown that the energy is affected by the velocity of the atom, but this correction is small. Our result for large Z is consistent with the work of Manson and Ritchie [Phys. Rev. B 29, 1084 (1984)], who follow a more traditional approach to the problem

  10. Mesonic atom production in high-energy nuclear collisions

    International Nuclear Information System (INIS)

    Wakai, M.; Bando, H.; Sano, M.

    1987-08-01

    The production probability of π-mesonic atom in high-energy nuclear collisions is estimated by a coalescence model. The production cross section is calculated for p + Ne and Ne + Ne systems at 2.1 GeV/A and 5.0 GeV/A beam energy. It is shown that nuclear fragments with larger charge numbers have the advantage in the formation of π-mesonic atoms. The cross section is proportional to Z 3 and of the order of magnitude of 1 ∼ 10 μb in all the above cases. The production cross sections of K-mesonic atoms are also estimated. (author)

  11. Glossary of scientific and technical terms in atomic energy

    International Nuclear Information System (INIS)

    1986-01-01

    In order to facilitate the task of Arabic speaking scientists in the field of nuclear energy, the Atomic Energy Commission of Syria assigned a committee constituted of leading physicists and chemists at Damascus University, the aim of the commission was to include the Arabic equivalent of the terms cited in English, French, Russian and Spanish in the glossary published by the United Nations, 1958 ''Atomic Energy Glossary of Technical Terms.'' The result of the committee's work was this glossary containing approximately 6000 terms in the field of nuclear energy which are given in Arabic, English, French, Russian and Spanish

  12. Binding energy and single-particle energies in the 16O Region

    International Nuclear Information System (INIS)

    Fiase, J.O.; Sharma, L.K.

    2004-01-01

    In this paper we present the binding energy of 16 O together with single-particle energies in the oxygen region by folding together a Hamiltonian in the rest-frame of the nucleus with two-body correlation functions based on the Nijmegen potential. We have found that the binding energies are very sensitive to the core radius rc and that the effects of tensor correlations are non-negligible.Our calculated binding energy, E B = - 127.8 MeV with r c = 0.241 fm compares well with the experimental binding energy, E B = - 127.6 MeV

  13. Coordination-resolved local bond relaxation, electron binding-energy shift, and Debye temperature of Ir solid skins

    Energy Technology Data Exchange (ETDEWEB)

    Bo, Maolin [Key Laboratory of Low-Dimensional Materials and Application Technologies, Ministry of Education, Xiangtan University, Xiangtan, Hunan 411105 (China); Wang, Yan [Key Laboratory of Low-Dimensional Materials and Application Technologies, Ministry of Education, Xiangtan University, Xiangtan, Hunan 411105 (China); School of Information and Electronic Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201 (China); Huang, Yongli, E-mail: huangyongli@xtu.edu.cn [Key Laboratory of Low-Dimensional Materials and Application Technologies, Ministry of Education, Xiangtan University, Xiangtan, Hunan 411105 (China); Yang, Xuexian [Department of Physics, Jishou University, Jishou, Hunan 416000 (China); Yang, Yezi [Key Laboratory of Low-Dimensional Materials and Application Technologies, Ministry of Education, Xiangtan University, Xiangtan, Hunan 411105 (China); Li, Can [Center for Coordination Bond Engineering, School of Materials Science and Engineering, China Jiliang University, Hangzhou 330018 (China); Sun, Chang Q., E-mail: ecqsun@ntu.edu.sg [Key Laboratory of Low-Dimensional Materials and Application Technologies, Ministry of Education, Xiangtan University, Xiangtan, Hunan 411105 (China); NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 (Singapore)

    2014-11-30

    Highlights: • Cohesive energy of the representative bond determines the core-level shift. • XPS derives the energy level of an isolated atom and its bulk shift. • XPS derives the local bond length, bond energy, binding energy density. • Thermal XPS resolves the Debye temperature and atomic cohesive energy. - Abstract: Numerical reproduction of the measured 4f{sub 7/2} energy shift of Ir(1 0 0), (1 1 1), and (2 1 0) solid skins turns out the following: (i) the 4f{sub 7/2} level of an isolated Ir atom shifts from 56.367 eV to 60.332 eV by 3.965 eV upon bulk formation; (ii) the local energy density increases by up to 130% and the atomic cohesive energy decreases by 70% in the skin region compared with the bulk values. Numerical match to observation of the temperature dependent energy shift derives the Debye temperature that varies from 285.2 K (Surface) to 315.2 K (Bulk). We clarified that the shorter and stronger bonds between under-coordinated atoms cause local densification and quantum entrapment of electron binding energy, which perturbs the Hamiltonian and the core shifts in the skin region.

  14. Atomic scale simulations of pyrochlore oxides with a tight-binding variable-charge model: implications for radiation tolerance

    International Nuclear Information System (INIS)

    Sattonnay, G; Tétot, R

    2014-01-01

    Atomistic simulations with new interatomic potentials derived from a tight-binding variable-charge model were performed in order to investigate the lattice properties and the defect formation energies in Gd 2 Ti 2 O 7 and Gd 2 Zr 2 O 7 pyrochlores. The main objective was to determine the role played by the defect stability on the radiation tolerance of these compounds. Calculations show that the titanate has a more covalent character than the zirconate. Moreover, the properties of oxygen Frenkel pairs, cation antisite defects and cation Frenkel pairs were studied. In Gd 2 Ti 2 O 7 the cation antisite defect and the Ti-Frenkel pair are not stable: they evolve towards more stable defect configurations during the atomic relaxation process. This phenomenon is driven by a decrease of the Ti coordination number down to five which leads to a local atomic reorganization and strong structural distortions around the defects. These kinds of atomic rearrangements are not observed around defects in Gd 2 Zr 2 O 7 . Therefore, the defect stability in A 2 B 2 O 7 depends on the ability of B atoms to accommodate high coordination number (higher than six seems impossible for Ti). The accumulation of structural distortions around Ti-defects due to this phenomenon could drive the Gd 2 Ti 2 O 7 amorphization induced by irradiation. (paper)

  15. Establishment of 'Japan Atomic Energy Agency'. Its role and expectation

    International Nuclear Information System (INIS)

    Nakahara, Toru; Itakura, Shuichiro; Shiozawa, Shusaku; Hino, Ryutaro; Fujii, Yasuhiko; Sakurada, Michio; Kimura, Itsuro; Kikuyama, Kaoru

    2005-01-01

    In October 2005, the Japan Atomic Energy Agency (JAEA) was established as an independent administrative institution with the integration of the Japan Atomic Energy Research Institute (JAERI) and the Japan Nuclear Cycle Development Institute (JNC). JAEA is the only institute in Japan dedicated to comprehensive research and development in the field of nuclear energy. This paper put together a special article on its role and expectation. Firstly the essentials of comprehensive nuclear research and its future perspective were discussed mainly based on 'Framework for Nuclear Energy Policy' of the Atomic Energy Commission of Japan. Eight articles were followed on specific items such as quantum beams utilization, hydrogen production with nuclear heat, neutron science and ITER project, and put stress on joint works and smooth transfer of related technology to the private sector. (T. Tanaka)

  16. Reaction of hydrogen with Ag(111): binding states, minimum energy paths, and kinetics.

    Science.gov (United States)

    Montoya, Alejandro; Schlunke, Anna; Haynes, Brian S

    2006-08-31

    The interaction of atomic and molecular hydrogen with the Ag(111) surface is studied using periodic density functional total-energy calculations. This paper focuses on the site preference for adsorption, ordered structures, and energy barriers for H diffusion and H recombination. Chemisorbed H atoms are unstable with respect to the H(2) molecule in all adsorption sites below monolayer coverage. The three-hollow sites are energetically the most favorable for H chemisorption. The binding energy of H to the surface decreases slightly up to one monolayer, suggesting a small repulsive H-H interaction on nonadjacent sites. Subsurface and vacancy sites are energetically less favorable for H adsorption than on-top sites. Recombination of chemisorbed H atoms leads to the formation of gas-phase H(2) with no molecular chemisorbed state. Recombination is an exothermic process and occurs on the bridge site with a pronounced energy barrier. This energy barrier is significantly higher than that inferred from experimental temperature-programmed desorption (TPD) studies. However, there is significant permeability of H atoms through the recombination energy barrier at low temperatures, thus increasing the rate constant for H(2) desorption due to quantum tunneling effects, and improving the agreement between experiment and theory.

  17. Funnel metadynamics as accurate binding free-energy method

    Science.gov (United States)

    Limongelli, Vittorio; Bonomi, Massimiliano; Parrinello, Michele

    2013-01-01

    A detailed description of the events ruling ligand/protein interaction and an accurate estimation of the drug affinity to its target is of great help in speeding drug discovery strategies. We have developed a metadynamics-based approach, named funnel metadynamics, that allows the ligand to enhance the sampling of the target binding sites and its solvated states. This method leads to an efficient characterization of the binding free-energy surface and an accurate calculation of the absolute protein–ligand binding free energy. We illustrate our protocol in two systems, benzamidine/trypsin and SC-558/cyclooxygenase 2. In both cases, the X-ray conformation has been found as the lowest free-energy pose, and the computed protein–ligand binding free energy in good agreement with experiments. Furthermore, funnel metadynamics unveils important information about the binding process, such as the presence of alternative binding modes and the role of waters. The results achieved at an affordable computational cost make funnel metadynamics a valuable method for drug discovery and for dealing with a variety of problems in chemistry, physics, and material science. PMID:23553839

  18. The International Atomic Energy Agency - IAEA

    International Nuclear Information System (INIS)

    Pezzutti, A.A.C.

    1980-01-01

    The origens, functions and objectives of the IAEA are analysed. The application of safeguards to avoid military uses of nuclear energy is discussed. In the final section the agrement between Brazil and Germany regarding IAEA safeguards, as well as the competence for executing the brazilian program are explained. It is, then, an informative study dealing with nuclear energy and its peaceful path, the creation of International Fuel Cycle Evaluation and nonproliferation [pt

  19. Exciton binding energy in a pyramidal quantum dot

    Indian Academy of Sciences (India)

    A ANITHA

    2018-03-27

    Mar 27, 2018 ... screening function on exciton binding energy in a pyramid-shaped quantum dot of ... tures may generate unique properties and they show .... where Ee is the ground-state energy of the electron in ... Figure 1. The geometry of the pyramidal quantum dot. base and H is the height of the pyramid which is taken.

  20. Atomic Energy Law and technical standardization

    International Nuclear Information System (INIS)

    Vieweg, K.

    1982-01-01

    The dissertation given a representation of the origination of the Nuclear Technology Committee (KTA), its responsibilities and organization, and of the procedure of establishing and amending the KTA rules in terms of factural structure, and deals with the legal quality of the KTA and its legal organizational form. In addition, it describes the legal status of the KTA members, the legal quality of the KTA office and of the bodies participating in the establishment of rules. In conclusion, it deals with the legal quality of KTA rules and their legal significances within administrative and court procedures and proceedings bearing on atomic law. The author qualifies the KTA rules as simple administrative acts in the form of abstract-general anticipated expert's opinions. (HSCH) [de

  1. Binding energies and chemical shifts of least bound core electron excitations in cubic Asub(N)Bsub(8-N) semiconductors

    International Nuclear Information System (INIS)

    Bechstedt, F.; Enderlein, R.; Wischnewski, R.

    1981-01-01

    Core electron binding energies Esup(B) with respect to the vacuum level and their chemical shifts are calculated for the least bound core levels of cations and anions of cubic Asub(N)Bsub(8-N) semiconductors. Starting from the HF-binding energy of the free atom absolute values of Esup(B) are obtained by adding core level shifts and relaxation energies. Core level shifts are calculated by means of an electrostatic model with ionic and bond charges according to Phillips' bond charge model. For the calculation of relaxation energies the linear dielectric theory of electronic polarization is applied. Valence and core electrons, and diagonal and non-diagonal screening are taken into account. The theoretical results for chemical shifts of binding energies are compared with experimental values from XPS-measurements corrected by work function data. Good agreement is obtained in all cases within the error limit of about one eV. Chemical and atomic trends of core level shifts, relaxation energies, and binding energies are discussed in terms of changes of atomic and solid state parameters. Chemical shifts and relaxation energies are predicted for various ternary Asub(N)Bsub(8-N) compounds. (author)

  2. Present status and perspective of Japanese atomic energy industry

    International Nuclear Information System (INIS)

    Miura, Kenzo

    1990-01-01

    Already 35 years are going to elapse since atomic energy industry was founded in Japan, and the positive development has been carried out in the nuclear power generation mainly with light water reactors as the base energy, as the result, now both the result of electric power generation and the technology have reached the highest level in the world. These are due to the accumulation of efforts, the preponderant assignment of able men and the positive investment for the research and development of the atomic energy industry. However, since 1985, the slowdown of power reactor development, the practical use of new type power reactors such as fast breeder reactors and the establishment of nuclear fuel cycle such as uranium enrichment and fuel reprocessing have been the new situation to be dealt with. In order to properly and flexibly cope with such change of situation, the healthy development of the atomic energy industry so as to secure the market on a certain scale and develop the business with responsibility is indispensable. The outlay of electric power industry related to atomic energy, the development of atomic energy market and the sales of mining and manufacturing industries, the trend of research and development and personnel, and the perspective and subjects of hereafter are reported. (K.I.)

  3. The promotion and control functions of atomic energy law

    International Nuclear Information System (INIS)

    Roser, T.

    1998-01-01

    The question about the purpose of atomic energy law may sound superfluous in Germany, a country where a highly differential legal framework for the peaceful utilization of nuclear power has existed for nearly 40 years in the Basic Law, the Atomic Energy Act, and its ordinances, and a comprehensive body of case laws. Yet, it is justified in view of the declared intention of the German federal government to establish an environmental code into which atomic energy law, hitherto an independent branch of the law, would be integrated, and it is justified also in view of persistent complaints that the present rules and regulations stifled investment activities. A look into some codes of law may help answer the question. Already in 1959, the authors of the Atomic Energy Act outlined the purposes of the legislation in relatively clear terms in Section 1. Besides the two foreign policy aspects of security and loyalty under treaties, which do not concern us in this connection, the key purposes of atomic energy law are stated there as promotion and protection. The protection purpose, which implies the need to protect life, health, and property from the hazards of nuclear energy and harmful effects of ionizing radiation, ranks second in the Act. In accordance with the ruling in 1972 of the Federal Administrative Court, however, it should rank at the top. (orig.) [de

  4. The licensing procedure under Atomic Energy Law

    International Nuclear Information System (INIS)

    Ronellenfitsch, M.

    1983-01-01

    This post-doctoral thesis of 1981 has been updated to include developments in this field up to the year 1983. The author discusses in detail all questions relating to the peaceful uses of nuclear energy in the Federal Republic of Germany, predominantly from the point of view of administrative law. He investigates nuclear energy and its contribution to electricity supplies with a view to other energy sources, renewable energy sources, alternative energy policies, nuclear fuel and the fuel cycle, development of the nuclear industry, nuclear power stations in operation, under construction, or in development. Following a survey of the nuclear controversy, both on the national and the international level, the author reviews the legal system and arising controversies in the Federal Republic of Germany, defining the purpose of this thesis to be the systematic analysis of the available legal instruments, in order to show structural deficiencies in the planning law relating to nuclear power stations, and thus reasons of ambiguities within the licensing procedure. The author studies the following terms and requirements: licensing requirements and licensability, the licensing method and scenario, the legal character of licences, their contents and effects within the stepwise procedure, and due publication. (HSCH) [de

  5. Energy-enhanced atomic layer deposition : offering more processing freedom

    NARCIS (Netherlands)

    Potts, S.E.; Kessels, W.M.M.

    2013-01-01

    Atomic layer deposition (ALD) is a popular deposition technique comprising two or more sequential, self-limiting surface reactions, which make up an ALD cycle. Energy-enhanced ALD is an evolution of traditional thermal ALD methods, whereby energy is supplied to a gas in situ in order to convert a

  6. Law on the use of atomic energy for peaceful purposes

    International Nuclear Information System (INIS)

    1995-01-01

    This is an amended and corrected edition of the Bulgarian atomic energy law. Its purpose is to promote nuclear energy peaceful applications, to regulate the use of radioactive substances and instrumentation, to provide protection against the radioactive hazards. The Law also determines the status of the Governmental Regulatory Body - the CUAEPP

  7. Energy eigenvalues of helium-like atoms in dense plasmas

    International Nuclear Information System (INIS)

    Hashino, Tasuke; Nakazaki, Shinobu; Kato, Takako; Kashiwabara, Hiromichi.

    1987-04-01

    Calculations based on a variational method with wave functions including the correlation of electrons are carried out to obtain energy eigenvalues of Schroedinger's equation for helium-like atoms embedded in dense plasmas, taking the Debye-Hueckel approximation. Energy eigenvalues for the 1 1 S, 2 1 S, and 2 3 S states are obtained as a function of Debye screening length. (author)

  8. The 25th anniversary of the International Atomic Energy Agency

    International Nuclear Information System (INIS)

    Osztrovszki, Gy.

    1982-01-01

    The leader of the Hungarian delegation at the 26th General Assembly of the International Atomic Energy (IAEA) held in Vienna in September, 1982, on the occasion of the IAEA's 25th anniversary, presented a short review of the IAEA's activities during its existence, the Hungarian participation in them and Hungary's efforts in the peaceful uses of the nuclear energy. (A.L.)

  9. Positron impact ionization of atomic hydrogen at low energies

    Indian Academy of Sciences (India)

    The study of low energy ionization of atomic hydrogen has undergone a rapid ... Three distinct theories for describing low energy ionization can now .... clear evidence that the backward peak for ΘЅѕ = 180° is due to positron-nucleus scat-.

  10. Single atom identification by energy dispersive x-ray spectroscopy

    International Nuclear Information System (INIS)

    Lovejoy, T. C.; Dellby, N.; Krivanek, O. L.; Ramasse, Q. M.; Falke, M.; Kaeppel, A.; Terborg, R.; Zan, R.

    2012-01-01

    Using aberration-corrected scanning transmission electron microscope and energy dispersive x-ray spectroscopy, single, isolated impurity atoms of silicon and platinum in monolayer and multilayer graphene are identified. Simultaneously acquired electron energy loss spectra confirm the elemental identification. Contamination difficulties are overcome by employing near-UHV sample conditions. Signal intensities agree within a factor of two with standardless estimates.

  11. Department of Atomic Energy [India]: Annual report 1979-1980

    International Nuclear Information System (INIS)

    1980-01-01

    The work of the research establishments, projects undertaken and public sector undertakings of the Department of Atomic Energy during the financial year 1979-80 is surveyed. The research and development activities of the Bhabha Atomic Research Centre at Bombay, the Reactor Research Centre at Kalpakkam, the Tata Institute of Fundamental Research at Bombay, the Saha Institute of Nuclear Physics at Calcutta and the Tata Memorial Centre at Bombay are described. An account of the progress of heavy water production plant projects, the Madras and Narora Atomic Power Projects, the MHD project and the 100 MW thermal research reactor R-5 Project at Trombay is given. Performance of the Tarapur and Rajasthan Atomic Power Stations, Nuclear Fuel Complex at Hyderabad, Atomic Minerals Division, ISOMED (the radiation sterilisation plant for medical products) at Bombay, the Indian Rare Earths Ltd., the Uranium Corporation of India Ltd., and the Electronics Corporation of India Ltd., Hyderabad is reported. (M.G.B.)

  12. Atomic Energy Commission reports. Volume 6. Opinions and decisions of the Atomic Energy Commission with selected orders, January 1, 1973 to December 31, 1973

    International Nuclear Information System (INIS)

    1974-01-01

    Issuances of the Atomic Energy Commission, the Atomic Safety and Licensing Appeal Boards, the Atomic Safety and Licensing Boards, and the Board of Contract Appeals including the Contract Adjustment Board are presented. (U.S.)

  13. International nuclear low and atomic energy

    International Nuclear Information System (INIS)

    Aouinet, Nejib

    2008-01-01

    The aim of this work is to put points on the codification of international law of nuclear energy and its uses in military and peaceful in the first part. The second part was devoted for the imperfection of the law of international nuclear.

  14. Classical calculation of the total ionization energy of helium-like atoms

    International Nuclear Information System (INIS)

    Karastoyanov, A.

    1990-01-01

    Quantum mechanics rejects the classical modelling of microworld. One of the reasons is that the Bohr's rules can not be applied for many-electron atoms and molecules. But the many-body problem in classical mechanics has no analytical solution even for 3 particles. Numerical solutions should be used. The quantum Bohr's rule expressing the moment of momentum conservation for two particles is invalid in more complicated cases. Yet Bohr reached some success for helium-like atoms. The Bohr's formula concerning helim-like atoms is deduced again in this paper and its practical reliability is analyzed with contemporary data. The binding energy of the system is obtained in the simple form E=(Z-1/4) 2 α 2 mc 2 , where Z is the atomic number, α - the fine structure constant, M - the electron mass and c - the light speed in vacuum. The calculated values are compared with experimental data on the total ionization energy of the helium-like atoms from 2 He 4 to 29 Cu 64 . The error decreases quickly with the increasing of atomic mass, reaching zero for Cu. This indicated that the main source of error is the nucleus motion. The role of other possible causes is analyzed and proves negligible. (author). 1 tab, 4 refs

  15. The law for the Japan Atomic Energy Research Institute

    International Nuclear Information System (INIS)

    1979-01-01

    The institute is established under the atomic energy basic law to make effectively research of development of atomic energy in general and help to promote investigation, development and utilization of it. The institute is a legal person and has its main office in Tokyo. Its capital is the amount of yen 2,500 million plus contributions by persons other than the government. The government invests the said yen 2,500 million at the time of its establishment. The articles of the institute shall prescribe matters, such as: capital, contributions and assets; officer and meeting; business and its execution; accounting, etc. The officers are consisted of a chief director, a deputy chief director and less than 7 directors and less than 2 auditors. The chief director is appointed by the Prime Minister with the consent of the atomic energy commission. The term of the chief director, the deputy chief director and directors is 4 years and that of auditors is 2 years. Functions of the institute include basic and application research of atomic energy, planning, building and operation of reactors, training of researchers and engineers of atomic energy, etc. The budget, the business program and the financial project shall be prepared each business year and authorized by the Prime Minister. The institute is subject to the supervision of the Prime Minister. (Okada, K.)

  16. The atomic policy consensus as legally binding contract; Der Atomkonsens als rechtsverbindlicher Vertrag. Gutachten im Rahmen des ICSID-Schiedsverfahrens Vattenfall v. Germany im Auftrag der Vattenfall AB

    Energy Technology Data Exchange (ETDEWEB)

    Kischel, Uwe

    2017-07-01

    The booklet on the atomic policy consensus as legally binding contract covers the following issues: legal prerequisites for legal binding, interpretation viewpoints, possible further aspect of the legal binding.

  17. Deep Atomic Binding (DAB) Hypothesis: A New Approach of Fission Product Chemistry

    International Nuclear Information System (INIS)

    Ajlouni, Abdul-Wali M.S.

    2006-01-01

    Former studies assumed that, after fission process occurs, the highly ionized new born atoms (20-22 positive charge), ionize the media in which they pass through before becoming stable atoms in a manner similar to 4-MeV ?-particles. Via ordinary chemical reactions with the surroundings, each stable atom has a probability to form chemical compound. Since there are about 35 different elemental atoms created through fission processes, a large number of chemical species were suggested to be formed. But, these suggested chemical species were not found in the environment after actual releases of FP during accidents like TMI (USA, 1979), and Chernobyl (former USSR, 1986), also the models based on these suggested reactions and species could not interpret the behavior of these actual species. It is assumed here that the ionization states of the new born atoms and the long term high temperature were not dealt with in an appropriate way and they were the reasons of former models failure. Our new approach of Deep Atomic Binding (DAB) based on the following: 1-The new born atoms which are highly ionized, 10-12 electrons associated with each nucleus, having a large probability to create bonds between them to form molecules. These bonds are at the L, or M shells, and we call it DAB. 2-The molecules stay in the reactor at high temperatures for long periods, so they undergo many stages of composition and decomposition to form giant molecules. By applying DAB approach, field data from Chernobyl, TMI and nuclear detonations could be interpreted with a wide coincidence resulted. (author)

  18. Van der Waals dispersion energy between atoms and nanoparticles

    International Nuclear Information System (INIS)

    Boustimi, M; Loulou, M; Natto, S; Belafhal, A; Baudon, J

    2017-01-01

    In this work, we focus on the atom-surface interaction where the geometry of the surface is highly symmetric (i.e. sphere, cylinder and plane) and the atom is in ground state. We first present the main features of our model, based on the susceptibility tensors of the two partners in interaction, to determine a general expression of the dispersive energy of van der Waals interaction. Some results are given as applications of this model which addresses recent nanophysical problems, for example, when atoms are in the vicinity of metallic nanoshells, nanospheres or nanowires. (paper)

  19. Binding studies of costunolide and dehydrocostuslactone with HSA by spectroscopy and atomic force microscopy

    International Nuclear Information System (INIS)

    Gao Wenhua; Li Nana; Chen Gaopan; Xu Yanping; Chen Yaowen; Hu Shunlin; Hu Zhide

    2011-01-01

    Human serum albumin (HSA), a major plasma protein and plasma-derived therapeutic, interacts with a wide variety of drugs and native plasma metabolites. In this study the interactions of costunolide (CE) and dehydrocostuslactone (DE) with HSA were investigated by molecule modeling, atomic force microscopy (AFM), and different optical techniques. In the mechanism discussion, it was proved that fluorescence quenching of HSA by both of the drugs is a result of the formation of drug-HSA complexes. Binding parameters for the reactions were determined according to the Stern-Volmer equation and static quenching. The results of thermodynamic parameters ΔG 0 , ΔH 0 , and ΔS 0 at different temperatures indicated that hydrogen bonding interactions play a major role in the drug-HSA associations process. The binding properties were further studied by quantitative analysis of CD, FTIR, and Raman spectra. Furthermore, AFM results showed that the dimension of HSA molecules became more swollen after binding with the drugs. - Highlights: → Interactions of costunolide and dehydrocostuslactone with HSA have been investigated for the first time. → Raman spectra were used to analyze the drug-HSA interactions. → Atomic force microscopy has been used to study the topography change of HSA by addition of the drugs. → These results are important for the drugs containing costunolide and dehydrocostuslactone distribution and metabolism.

  20. Annual meeting on nuclear technology '88. Technical session on focal points of the atomic energy law and the radiation protection law in 1988

    International Nuclear Information System (INIS)

    1988-06-01

    This issue of Annual Meeting on Nuclear Technology reports presents the papers of the technical session on 'Focal points of the atomic energy law and the radiation protection law in 1988'. The titles are: Is there a binding link between decisions of the atomic energy authority and criminal law? Conclusions to be drawn from the Alkem case court decision. - Recent developments in atomic energy law. - Current radiation protection law. - Codetermination at plant level in a nuclear installation. - The legal position of foreigners from neigbour countries in the field of atomic energy law. The licensing of nuclear installations near the border. (RST) [de

  1. Analysis of experimental positron-molecule binding energies

    International Nuclear Information System (INIS)

    Danielson, J R; Surko, C M; Young, J A

    2010-01-01

    Experiments show that positron annihilation on molecules frequently occurs via capture into vibrational Feshbach resonances. In these cases, the downshifts in the annihilation spectra from the vibrational mode spectra provide measures of the positron-molecule binding energies. An analysis of these binding energy data is presented in terms of the molecular dipole polarizability, the permanent dipole moment, and the number of π bonds in aromatic molecules. The results of this analysis are in reasonably good agreement with other information about positron-molecule bound states. Predictions for other targets and promising candidate molecules for further investigation are discussed.

  2. Scientists speak of the peaceful use of atomic energy

    International Nuclear Information System (INIS)

    Salas Murillo, Otto; Rodriguez Solis, Marisel

    2010-01-01

    Experts from Argentina, Cuba, Mexico, Peru and Costa Rica have met in that last country, to offer the forum 'Peaceful uses of atomic energy: prospects for Costa Rica'. Specialists were invited by the Centro de Investigacion en Biologia Celular y Molecular (CIBCM) of the Universidad de Costa Rica (UCR) and the Centro de Investigacion en Biotecnologia (CIB) of Instituto Tecnologico de Costa Rica. The forum has developed around the theme the usefulness of atomic energy for science, and importance for the development of the country. The peaceful use of atomic energy was explained by specialists in each country, specifically in the field of health, industry, agriculture, industrial equipment sterilization, medical products, body tissues and crops [es

  3. Status of Nuclear Activities of Bangladesh Atomic Energy Commission

    Energy Technology Data Exchange (ETDEWEB)

    Begum, Zakia [Planning and Development, Bangladesh Atomic Energy Commission - BAEC, Paramanu Bhaban, E 12/A, Agargoan, 01207 Shere Banglanagar, Dhaka (Bangladesh)

    2008-07-01

    Bangladesh Atomic Energy Commission (BAEC) is the national authority for acquisition, development and application of Nuclear Science and Technology and thus is playing the pioneering role for the development of the country's nuclear research programmes and thus helping to achieve the cherished goal of self-reliance through national efforts and international co-operation. Being firmly committed to the peaceful uses of Atomic Energy, programmes have been undertaken in Physical Sciences, Biological Sciences, Engineering and Nuclear Power Sector by Bangladesh Atomic Energy Commission and some of the results have been transferred from laboratories to hospitals, agriculture, industries and environment for practical applications. In spite of some major constrains, presently BAEC's activities have increased many folds and keeping in view of the overall power crisis of the country efforts have also been given to establish Nuclear Power Plant in the country. (author)

  4. General engineering ethics and multiple stress of atomic energy engineering

    International Nuclear Information System (INIS)

    Takeda, Kunihiko

    1999-01-01

    The factors, by which the modern engineering ethics has been profoundly affected, were classified to three categories, namely mental blow, the destruction of human function and environment damage. The role of atomic energy engineering in the ethic field has been shown in the first place. It is pointed out that it has brought about the mental blow by the elucidation of universal truth and discipline and the functional disorder by the power supply. However, the direct effect of radiation to the human kinds is only a part of the stresses comparing to the accumulation of the social stress which should be taken into account of by the possibility of disaster and the suspicion of the atomic energy politics. An increase in the multiple stresses as well as the restriction of criticism will place obstacles on the promotion of atomic energy. (author)

  5. General engineering ethics and multiple stress of atomic energy engineering

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, Kunihiko [Shibaura Inst. of Tech., Tokyo (Japan)

    1999-08-01

    The factors, by which the modern engineering ethics has been profoundly affected, were classified to three categories, namely mental blow, the destruction of human function and environment damage. The role of atomic energy engineering in the ethic field has been shown in the first place. It is pointed out that it has brought about the mental blow by the elucidation of universal truth and discipline and the functional disorder by the power supply. However, the direct effect of radiation to the human kinds is only a part of the stresses comparing to the accumulation of the social stress which should be taken into account of by the possibility of disaster and the suspicion of the atomic energy politics. An increase in the multiple stresses as well as the restriction of criticism will place obstacles on the promotion of atomic energy. (author)

  6. German atomic energy law in the international framework

    International Nuclear Information System (INIS)

    Pelzer, N.

    1992-01-01

    The regional conference was devoted to the legal problems that ensue from German reunification against the background of the integration of German atomic energy law within international law. The elements of national atomic energy legislation required by international law and recent developments in international nuclear liability law were discussed from different perspectives. The particular problems of the application of the German Atomic Energy Act in the 5 new Laender (the territories of the former GDR) were presented and discussed, namely: The continued validity of old licences issued by the GDR; practical legal problems connected with the construction of nuclear power plants in the 5 new Laender; the legal issues connected with the final repository for radioactive wastes at Morsleben; and the new developments in radiation protection law following from the Unification Treaty and the new ICRP recommendations. All 14 lectures have been abstracted and indexed individually. (orig.) [de

  7. Philippine Atomic Energy Commission 1972 - 1980

    International Nuclear Information System (INIS)

    1981-01-01

    This publication presents in a nutshell the organization, its facilities and equipment resources and its thrusts and accomplishments as contributions to the country's programs from 1972 to 1981. It enumerates its research and development program geared toward basic needs like food and agriculture, energy studies; industry and engineering, medicine, public health and nutrition, improvement of the human environment and other basic objective researches. Equally important besides its research and development program are its other functions on nuclear regulation and safety, technical extension services, nuclear public acceptance, nuclear manpower development, and its commitments in international affairs by means of bilateral agreements. (author)

  8. Decisions of the atomic energy authority binding on penal law?

    International Nuclear Information System (INIS)

    Horn, E.

    1988-01-01

    The essay analyses the acquittal of the accused persons by the Landgericht Hanau in the so-called Alkem process. The author criticizes the considerations of the court to disregard in case the justifying effect of valid administrative permissions because of the abuse of rights. A criminal judge cannot ignore valid acts given by authorities which he considers to be against the law. As long as he does not identify them as invalid, he has to accept the administrative act until authorities abolish their decision. (KW) [de

  9. 1989 basic plan for atomic energy development and utilization

    International Nuclear Information System (INIS)

    1989-01-01

    A Basic Plan for Atomic Energy Development and Utilization has been established each year based on the guidelines set up by the Atomic Energy Commission of Japan, with the aim of promoting the development and utilization of atomic energy schematically and efficiently. The Basic Plan shows specific projects to achieve the objectives specified in the Long-Range Plan for Atomic Energy Development and Utilization. The Basic Plan specifies efforts to be made for overall strengthening of safety measures (safety policies, safety research, disaster prevention, etc.), promotion of nuclear power generation, establishment of the nuclear fuel cycle (securing of uranium, technology for uranium enrichment, reprocessing, etc.), development of new types of power reactors (fast breeder reactor, new types of converter reactors, plutonium fuel processing technology), promotion of leading projects (nuclear fusion, utilization of radiations, atomic powered ships, high-temperature engineering tests), promotion of basic technology development (basic research, training of scientists and engineers), voluntary and active international activities (international cooperation), and acquisition of understanding and cooperation of the general public. (N,K.)

  10. The situation of Chinese atomic energy and cooperation

    International Nuclear Information System (INIS)

    Nagasaki, Takao

    2003-01-01

    China will have 8.7 million kW atomic energy in 2005. Japan will complete with China in a sale war of international atomic energy and domestic power source. The position, development and situation of Chinese atomic energy and the future nuclear fuel cycle are reported. 5.4 million kW of 7 atomic power plants in China and 45.9 million kW of 53 plants in Japan are running. 3.3 million kW of 4 plants in China and 4 million kW of 4 plants in Japan are building. New type reactor, the fast breeder and high temperature gas-cooled reactor are developing. Radiation exposure to food, radiation therapy, Radio-pharmaceuticals, polymerization and treatment of sewage and smoke are carried out. The situation of atomic energy co-operation between China and Japan and other countries are stated. Japan has to change to advance mutual interests type co-operation with China. Construction of the nuclear community in Asia area and development of the international long big project are proposed. (S.Y.)

  11. Analytic properties of the relativistic Thomas-Fermi equation and the total energy of atomic ions

    International Nuclear Information System (INIS)

    March, N.H.; Senatore, G.

    1985-06-01

    The analytic properties of solutions of the relativistic Thomas-Fermi equation which tend to zero at infinity are first examined, the neutral atom solution being a member of this class. A new length is shown to enter the theory, proportional to the square root of the fine structure constant. This information is used to develop a perturbation expansion around the neutral atom solution, corresponding to positive atomic ions with finite but large radii. The limiting law relating ionic radius to the degree of ionization is thereby displayed in functional form, and solved explicitly to lowest order in the fine structure constant. To embrace this knowledge of heavy positive ions, as well as results from the one-electron Dirac equation, a proposal is then advanced as to the analytic form of the relativistic total energy E(Z,N) of an atomic ion with nuclear charge Ze and total number of electrons N. The fact that, for N>1, the nucleus is known only to bind Z+n electrons, where n is 1 or 2, indicates non-analyticity in the complex Z plane, represented by a circle of radius Z approx.= N. Such non-analyticity is also a property of the non-relativistic energy derived from the many-electron Schroedinger equation. The relativistic theory, however, must also embody a second type of non-analyticity associated with the known property for N=1 that the Dirac equation predicts electron-positron pair production when the electronic binding energy becomes equal to twice the electron rest mass energy. This corresponds to a second circle of non-analyticity in E(Z,N), and hence to a Taylor-Laurent expansion of this quantity in the atomic number Z. The relation of this expansion to the Layzer-Bahcall series is finally discussed. (author)

  12. Understanding Atomic Structure: Is There a More Direct and Compelling Connection between Atomic Line Spectra and the Quantization of an Atom's Energy?

    Science.gov (United States)

    Rittenhouse, Robert C.

    2015-01-01

    The "atoms first" philosophy, adopted by a growing number of General Chemistry textbook authors, places greater emphasis on atomic structure as a key to a deeper understanding of the field of chemistry. A pivotal concept needed to understand the behavior of atoms is the restriction of an atom's energy to specific allowed values. However,…

  13. Large-dimension configuration-interaction calculations of positron binding to the group-II atoms

    International Nuclear Information System (INIS)

    Bromley, M. W. J.; Mitroy, J.

    2006-01-01

    The configuration-interaction (CI) method is applied to the calculation of the structures of a number of positron binding systems, including e + Be, e + Mg, e + Ca, and e + Sr. These calculations were carried out in orbital spaces containing about 200 electron and 200 positron orbitals up to l=12. Despite the very large dimensions, the binding energy and annihilation rate converge slowly with l, and the final values do contain an appreciable correction obtained by extrapolating the calculation to the l→∞ limit. The binding energies were 0.00317 hartree for e + Be, 0.0170 hartree for e + Mg, 0.0189 hartree for e + Ca, and 0.0131 hartree for e + Sr

  14. The tenth Arab conference on peaceful uses of atomic energy

    International Nuclear Information System (INIS)

    2010-01-01

    This conference includes the paper presented at the tenth Arab conference of the peaceful uses of Nuclear Atomic Energy that is organized by AAEA (Arab Atomic Energy Agency) in cooperation with Iraqi Ministry of Science and Technology and Kurdistan government , held in Erbil (Iraq) from 12-16 December 2010. This conference consists of three volumes covering the following concepts: Analysis and Material Improvement, Soil fertility, Water Recourse Management, Nuclear Medicine and Biological Irradiation, Isotopes Production, Improvement of Plant and Animal Production, Decommissioning and Dismantling of Nuclear Facilities, Radioactive Waste Management, Nuclear Safety and Security of Radiation Protection, Pest Control and Food Irradiation Processing

  15. The Atomic Energy Control Board's regulatory research and support program

    International Nuclear Information System (INIS)

    1988-04-01

    The purpose of the Regulatory Research and Support Program is to augment and extend the capability of the Atomic Energy Control Board's (AECB) regulatory program beyond the capability of in-house resources. The overall objective of the program is to produce pertinent and independent scientific and other knowledge and expertise that will assist the AECB in making correct, timely and credible decisions on regulating the development, application and use of atomic energy. The objectives are achieved through contracted research, development, studies, consultant and other kinds of projects administered by the Research and Radiation Protection Branch (RRB) of the AECB

  16. Legislation in Hungary. Implementation of the Act on Atomic Energy

    International Nuclear Information System (INIS)

    Szonyi, Z.

    1999-01-01

    The presentation gives a short overview of the history and development of the Hungarian nuclear regulatory regime. The new Act on Atomic Energy is a consequence of the significant internal and international changes. The main characteristic of the Act represent the new expectations and challenges of the nuclear community and the solid and reliable Hungarian legal solutions. The competences, duties and responsibilities of Hungarian Atomic Energy Authority and of the joining other relevant ministries and the complete regulatory framework guarantee the enforcement of the requirements set by the Act.(author)

  17. Annual report 2001[International Atomic Energy Agency

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    Article VI.J of the Agency's Statute requires the Board of Governors to submit 'an annual report to the General Conference concerning the affairs of the Agency and any projects approved by the Agency'. This report covers the period 1 January to 31 December 2001. The report outlines the IAEA activities in the following fields: nuclear power, nuclear fuel cycle and waste management technology, comparative assessment for sustainable energy development; food and agriculture, human health, marine environment and water resources, applications of physical and chemical sciences, nuclear safety, radiation safety, radioactive waste safety, co-ordination of safety activities, safeguards, security of material, verification in Iraq pursuant to UNSC resolutions, management of technical co-operation for development, policy-making, management and support.

  18. Atoms for peace - the work of the International Atomic Energy Agency

    International Nuclear Information System (INIS)

    Daglish, J.

    1984-01-01

    The article deals with the International Atomic Energy Agency (IAEA), which is situated in Vienna. The aims of the IAEA and its work are described. The safeguards system; promotional work; technical cooperation programme; and nuclear safety work concerned with basic safety standards for radiation protection; are all discussed. (U.K.)

  19. The World Power Conference and atomic energy

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1962-01-15

    The possibility that emerged after the last World War that useful power could be produced from nuclear fission led to optimistic estimates that nuclear power would prove to be the solution to the world's energy problems. The possible advantages of nuclear methods of power production compared with conventional means are discussed at the World Power Conference. The 1962 Conference with its theme 'The Changing Pattern of Power' will undoubtedly attract great interest in a world where the change-over from conventional to nuclear fuels for power production has started in some countries and is being actively examined in others. It is generally being realized that even though a country may possess indigenous supplies of uranium or thorium minerals, the building up of a nuclear industry i s a long and expensive process and the alternative of depending on countries more advanced in nuclear technology for the supply of materials, skill and know-how is costly in foreign exchange and international prestige. Many of the industrialized countries, still possessing supplies of conventional fuels, are preparing for the day when their reserves will become depleted and are embarking on training schemes to ensure a continuing supply of engineers and scientists skilled in nuclear arts

  20. International Atomic Energy Agency Annual Report 2014

    International Nuclear Information System (INIS)

    2015-01-01

    Along with an examination of the state of worldwide nuclear-related developments last year, the IAEA Annual Report 2014 provides a comprehensive look at the Agency’s activities over the course of the year. From coordinating 125 research projects to conducting 2114 nuclear verification inspections worldwide, the IAEA’s 2560 employees continued to work on a wide range of areas to meet the evolving needs of Member States. The Annual Report, published in August, will be discussed and endorsed at the IAEA’s General Conference in September. Serving 162 Member States, two more than the year before, the IAEA’s activities in 2014 focused on the following areas, in line with its mandate: • Nuclear Energy: The IAEA assisted Member States in the introduction of nuclear power programmes and in the efficient and safe use of nuclear energy, fostering innovation and building capability in energy planning, analysis, and nuclear information and knowledge management. • Nuclear Sciences and Applications: The IAEA continued to assist Member States in building, strengthening and maintaining capacities in the safe, peaceful and secure use of nuclear technology. • Nuclear Safety and Security: The IAEA and its Member States continued to strengthen nuclear safety worldwide, including through the implementation of the Action Plan on Nuclear Safety, which had been endorsed by the General Conference in 2011 after the accident at the Fukushima Daiichi nuclear power plant earlier that year. The IAEA also supported States, upon request, in their efforts to achieve effective security wherever nuclear and other radioactive materials are in use. • Nuclear Verification: The IAEA implemented safeguards in 180 States and as at the end of every year, it drew conclusions for each State for which safeguards were applied. • Technical Cooperation: The IAEA assisted Member States in their efforts to achieve the Millennium Development Goals and in preparation for the post-2015 Sustainable

  1. On mechanism of low-energy heavy ions scattering on a target surface with small atomic mass

    Energy Technology Data Exchange (ETDEWEB)

    Umarov, F.F. E-mail: farid1945@yahoo.com; Bazarbaev, N.N.; Kudryashova, L.B.; Krylov, N.M

    2002-11-01

    In the present work, an experimental study of low-energy (E{sub 0}=20-500 eV) heavy Cs{sup +} ions scattering on target surfaces with small atomic masses (Al, Si, Ni) has been performed for more accurate definition of mechanism of scattering and evaluation of an opportunity for use of heavy ions scattering as a tool of surface layer analysis. It is shown that the dependence of the relative energies of scattered ions versus the initial energy E/E{sub 0} (E{sub 0}) for Si (E{sub b}=4.64 eV/atom) and Ni (E{sub b}=4.43 eV/atom) approximately coincide despite the fact that the mass of Ni atom is twice as large as that of the Si atom mass. At the same time their binding energies E{sub b} are approximately equal to each other. It is found that the scattering angles of Cs{sup +} ions considerably exceed a limiting scattering angle {theta}{sub lim} in a single collision. It has been established that the scattering of low-energy heavy ions by light targets is described by a non-binary mechanism of many-particle interactions (simultaneous ion interaction with several target atoms). It has been shown that during the many-particle interactions the structure of energy spectra disappears; high relative energy of scattering ions and their dependence on energy of bombardment is observed. It has been found that the energy of scattered ions depends on binding energy, melting temperature and packing density of target atoms.

  2. International Atomic Energy Agency annual report 2006

    International Nuclear Information System (INIS)

    2007-01-01

    The Annual Report reviews the results of the Agency's programme according to the three pillars of technology, safety and verification. The main part of the report generally follows the programme structure as given in The Agency's Programme and Budget 2006-2007 (GC(49)/2). The introductory chapter seeks to provide a thematic analysis, based on the three pillars, of the Agency's activities within the overall context of notable developments during the year. More detailed information can be found in the latest editions of the Agency's Nuclear Safety Review, Nuclear Technology Review, Technical Cooperation Report and the Safeguards Statement for 2006 and Background to the Safeguards Statement. For the convenience of readers, these documents are available on the CD-ROM attached to the inside back cover of this report. Additional information covering various aspects of the Agency's programme is provided on the attached CD-ROM, and is also available on the Agency's web site at http://www.iaea.org/Worldatom/Documents/Anrep/Anrep2006/. Except where indicated, all sums of money are expressed in United States dollars. The designations employed and the presentation of material in this document do not imply the expression of any opinion whatsoever on the part of the Secretariat concerning the legal status of any country or territory or of its authorities, or concerning the delimitation of its frontiers. The topics covered in the chapter related to technology are: nuclear power; nuclear fuel cycle and materials technologies; capacity building and nuclear knowledge maintenance for sustainable energy development; nuclear science; food and agriculture; human health; water resources; assessment and management of marine and terrestrial environments; radioisotope production and radiation technology; safety and security; incident and emergency preparedness and response; safety of nuclear installations; radiation and transport safety; management of radioactive waste; nuclear security

  3. Nuclear Cartography: Patterns in Binding Energies and Subatomic Structure

    Science.gov (United States)

    Simpson, E. C.; Shelley, M.

    2017-01-01

    Nuclear masses and binding energies are some of the first nuclear properties met in high school physics, and can be used to introduce radioactive decays, fusion, and fission. With relatively little extension, they can also illustrate fundamental concepts in nuclear physics, such as shell structure and pairing, and to discuss how the elements…

  4. Polaron binding energy in polymers: poly[methyl(phenyl)silylene

    Czech Academy of Sciences Publication Activity Database

    Nožár, Juraj; Nešpůrek, Stanislav; Šebera, Jakub

    2012-01-01

    Roč. 18, č. 2 (2012), s. 623-629 ISSN 1610-2940 R&D Projects: GA AV ČR KAN400720701 Institutional research plan: CEZ:AV0Z40500505 Keywords : polaron * polaron binding energy * polysilane Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.984, year: 2012

  5. Binding energy and formation heat of UO2

    International Nuclear Information System (INIS)

    Almeida, M.R. de; Veado, J.T.; Siqueira, M.L. de

    The Born-Haber cycle is utilized for the calculation of the heat of formation of UO 2 , on the assumption that the binding energy is predominantly ionic in character. The ionization potentials of U and the repulsion energy are two critical values that influence calculations. Calculations of the ionization potentials with non-relativistic Hartree-Fock-Gaspar-Kohn-Sham approximation are presented [pt

  6. First-principles real-space tight-binding LMTO calculation of electronic structures for atomic clusters

    International Nuclear Information System (INIS)

    Xie, Z.L.; Dy, K.S.; Wu, S.Y.

    1997-01-01

    A real-space scheme has been developed for a first-principles calculation of electronic structures and total energies of atomic clusters. The scheme is based on the combination of the tight-binding linear muffin-tin orbital (TBLMTO) method and the method of real-space Green close-quote s function. With this approach, the local electronic density of states can be conveniently determined from the real-space Green close-quote s function. Furthermore, the full electron density of a cluster can be directly calculated in real space. The scheme has been shown to be very efficient due to the incorporation of the method of real-space Green close-quote s function and Delley close-quote s method of evaluating multicenter integrals. copyright 1996 The American Physical Society

  7. Free energies of binding from large-scale first-principles quantum mechanical calculations: application to ligand hydration energies.

    Science.gov (United States)

    Fox, Stephen J; Pittock, Chris; Tautermann, Christofer S; Fox, Thomas; Christ, Clara; Malcolm, N O J; Essex, Jonathan W; Skylaris, Chris-Kriton

    2013-08-15

    Schemes of increasing sophistication for obtaining free energies of binding have been developed over the years, where configurational sampling is used to include the all-important entropic contributions to the free energies. However, the quality of the results will also depend on the accuracy with which the intermolecular interactions are computed at each molecular configuration. In this context, the energy change associated with the rearrangement of electrons (electronic polarization and charge transfer) upon binding is a very important effect. Classical molecular mechanics force fields do not take this effect into account explicitly, and polarizable force fields and semiempirical quantum or hybrid quantum-classical (QM/MM) calculations are increasingly employed (at higher computational cost) to compute intermolecular interactions in free-energy schemes. In this work, we investigate the use of large-scale quantum mechanical calculations from first-principles as a way of fully taking into account electronic effects in free-energy calculations. We employ a one-step free-energy perturbation (FEP) scheme from a molecular mechanical (MM) potential to a quantum mechanical (QM) potential as a correction to thermodynamic integration calculations within the MM potential. We use this approach to calculate relative free energies of hydration of small aromatic molecules. Our quantum calculations are performed on multiple configurations from classical molecular dynamics simulations. The quantum energy of each configuration is obtained from density functional theory calculations with a near-complete psinc basis set on over 600 atoms using the ONETEP program.

  8. Multipolar electrostatics for proteins: atom-atom electrostatic energies in crambin.

    Science.gov (United States)

    Yuan, Yongna; Mills, Matthew J L; Popelier, Paul L A

    2014-02-15

    Accurate electrostatics necessitates the use of multipole moments centered on nuclei or extra point charges centered away from the nuclei. Here, we follow the former alternative and investigate the convergence behavior of atom-atom electrostatic interactions in the pilot protein crambin. Amino acids are cut out from a Protein Data Bank structure of crambin, as single amino acids, di, or tripeptides, and are then capped with a peptide bond at each side. The atoms in the amino acids are defined through Quantum Chemical Topology (QCT) as finite volume electron density fragments. Atom-atom electrostatic energies are computed by means of a multipole expansion with regular spherical harmonics, up to a total interaction rank of L = ℓA+ ℓB + 1 = 10. The minimum internuclear distance in the convergent region of all the 15 possible types of atom-atom interactions in crambin that were calculated based on single amino acids are close to the values calculated from di and tripeptides. Values obtained at B3LYP/aug-cc-pVTZ and MP2/aug-cc-pVTZ levels are only slightly larger than those calculated at HF/6-31G(d,p) level. This convergence behavior is transferable to the well-known amyloid beta polypeptide Aβ1-42. Moreover, for a selected central atom, the influence of its neighbors on its multipole moments is investigated, and how far away this influence can be ignored is also determined. Finally, the convergence behavior of AMBER becomes closer to that of QCT with increasing internuclear distance. Copyright © 2013 Wiley Periodicals, Inc.

  9. The Atomic Energy Commission's Annual Report to Congress for 1961. Major Activities in the Atomic Energy Programs, January - December 1961

    Energy Technology Data Exchange (ETDEWEB)

    Seaborg, Glenn T.

    1962-01-31

    The document represents the 1961 Annual Report of the Atomic Energy Commission (AEC) to Congress. This year's report consists of four parts: Part One, The Atomic Energy Industry for 1961 and Related Activities; Part Two, Nuclear Power Programs for 1961; Part Three, Major Activities in Atomic Energy Programs; and Part Four, Regulatory Activities. Sixteen appendices are also included.

  10. The Atomic Energy Commission's Annual Report to Congress for 1959. Major Activities in the Atomic Energy Programs, January - December 1959

    Energy Technology Data Exchange (ETDEWEB)

    McCone, John A.

    1960-01-31

    The document represents the first annual reporting versus semiannual reporting of the Atomic Energy Commission (AEC) to Congress. The report consists of three parts: Part One, The Atomic Energy Industry in 1959 and Related Activities; Part Two, Major Activities in Atomic Energy Programs; and Part Three, Management of Radioactive Wastes. Nineteen appendices are also included.

  11. Alternate Energy Sources for Thermalplastic Binding Agent Consolidation

    Energy Technology Data Exchange (ETDEWEB)

    Frame, B.J.

    1999-01-01

    A study was conducted to investigate microwave and electron beam technologies as alternate energy sources to consolidate fiber coated with a thermoplastic binding agent into preforms for composite molding applications. Bench experiments showed that both microwave and electron beam energy can produce heat sufficient to melt and consolidate a thermoplastic binding agent applied to fiberglass mat, and several two- and three-dimensional fiberglass preforms were produced with each method. In both cases, it is postulated that the heating was accomplished by the effective interaction of the microwave or electron beam energy with the combination of the mat preform and the tooling used to shape the preform. Both methods contrast with conventional thermal energy applied via infrared heaters or from a heated tool in which the heat to melt the thermoplastic binding agent must diffuse over time from the outer surface of the preform toward its center under a thermal gradient. For these reasons, the microwave and electron beam energy techniques have the potential to rapidly consolidate thick fiber preforms more efficiently than the thermal process. With further development, both technologies have the potential to make preform production more cost effective by decreasing cycle time in the preform tool, reducing energy costs, and by enabling the use of less expensive tooling materials. Descriptions of the microwave and electron beam consolidation experiments and a summary of the results are presented in this report.

  12. Positron scattering by atomic hydrogen at intermediate energies

    International Nuclear Information System (INIS)

    Higgins, K.; Burke, P.G.; Walters, H.R.J.

    1990-01-01

    Results of an accurate calculation based upon the intermediate energy R-matrix theory are reported for elastic scattering of positrons by atomic hydrogen. T-matrix elements for both low and intermediate energy scattering are evaluated for the S e , P o , D e and F o partial wave symmetries. The low-energy elastic phaseshifts are found to be in good agreement with previous accurate variational calculations. Using an optical potential approach to include the effect of the higher partial waves, elastic and total cross sections are presented for energies ranging from near threshold to 3.7 Rydbergs. (author)

  13. Environment. 1980-1994. International Atomic Energy Agency publications

    International Nuclear Information System (INIS)

    1995-06-01

    The catalogue lists all publications of the International Atomic Energy Agency dealing with the Environment issued during the period 1980-1993. The major subjects covered include: effect of agrochemical residues on soils and aquatic ecosystems, application of radioisotopes in conservation of the environment, siting of nuclear power plants, environmental isotope data and environmental contamination due to nuclear accidents

  14. Topical problems in the implementation of Atomic Energy Law

    International Nuclear Information System (INIS)

    Basse, H.

    1983-01-01

    The German Symposium on Atomic Energylaw, a discussion circle of law and various opinious in the field of nuclear energy, is 10 years old and has in the meanwhile become an institution. The 7th meeting again had an impressive scientific level as far as the speeches, and discussions were concerned. (orig.) [de

  15. Act to amend cost regulations of the Atomic Energy Act

    International Nuclear Information System (INIS)

    1980-01-01

    Article 21 is replaced by articles 21 to 21b. According to this, fees or reimbursements for expenses for official acts (e.g. decisions, supervisory acts, safeguarding of nuclear fuels) as well as for the use of facilities according to article 9a, section 3, of the Atomic Energy Act (e.g. Laender facilities to collect nuclear waste). (HP) [de

  16. China institute of atomic energy annual report 1991

    International Nuclear Information System (INIS)

    1992-01-01

    The Annual Report is a comprehensive review of achievements made by China Institute of Atomic Energy in 1991, which concerns nuclear physics (theories, experimentation), high power laser, mathematics, accelerators, reactor science and technology, radiochemistry, radiochemical engineering and analytical chemistry, isotopes, radiation protection and environmental protection

  17. China institute of atomic energy annual report (1995)

    International Nuclear Information System (INIS)

    1996-01-01

    This Report is a comprehensive review of achievements made by China Institute of Atomic Energy in 1995, which concerns nuclear physics (theories, experimentation), evaluation and calculation of nuclear data, experimental technique and equipment, high power laser, electro-physics, reactor science and technology, radiochemistry, radiochemical engineering and analytical chemistry, isotopes, application of nuclear technique, radiation protection and environmental protection

  18. Scientists credit `Atoms for Peace' for progress on energy, security

    CERN Multimedia

    Jones, D

    2003-01-01

    "Fifty years after President Eisenhower unveiled his plan for developing peaceful uses for nuclear fission, the scientific advances spawned by his Atoms for Peace program have made possible major advances in energy and national security, a panel of physicists said last week" (1 page).

  19. The creation of the Argentine Atomic Energy Commission

    International Nuclear Information System (INIS)

    Marzorati, Zulema del V.

    2000-01-01

    After a mention to the Argentine regulation of 1945 concerning the export of uranium ores and a short description of the 'Richter affair', the decree 10936 of 1950, that creates the Argentine Atomic Energy Commission (CNEA) , is analyzed. The activities of the CNEA between the years 1952 - 1955 are also outlined

  20. Radiation therapy. 1990-2001. International Atomic Energy Agency publications

    International Nuclear Information System (INIS)

    2001-04-01

    This catalog lists all sales publications of the International Atomic Energy Agency dealing with Radiation Therapy, and issued during the period 1 January 1990 - 30 April 2001. Most publications are issued in English, though some are also available in other languages. These are noted in the catalogue

  1. Atomic Energy of Canada Limited annual report 1986-87

    International Nuclear Information System (INIS)

    1987-01-01

    The annual report of Atomic Energy of Canada Limited for the fiscal year ended March 31, 1987 covers the followings subjects: report from the president; research company; CANDU operations; radiochemical company; the future; financial section and board of directors and officers

  2. A history of the Atomic Energy Control Board

    International Nuclear Information System (INIS)

    Sims, G.H.E.

    1980-07-01

    Topics covered include the pre-history of the AECB, its creation, early operations and evolution, its relations with nuclear research, the uranium industry, and the nuclear power industry, its involvement with transportation and safeguards, and some current problems. The focus is on the Atomic Energy Control Act and regulations derived from the act

  3. A Bibliography of Basic Books on Atomic Energy

    Energy Technology Data Exchange (ETDEWEB)

    None

    1974-01-01

    This booklet lists selected commercially published books for the general public on atomic energy and closely related subjects. Books for young readers have school grade annotations.This booklet contains an author index, a title index, and a list of publishers’ addresses.

  4. Atomic Energy of Canada Limited, annual report, 1995-1996

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-31

    The 1996 Annual Report of Atomic Energy of Canada Ltd. (AECL) is published and submitted to the Honourable member of Parliament, Minister of Natural Resources. Included in this report are messages from Marketing and Commercial Operation, Product Development, i e.CANDU and Research Reactors, CANDU research, Waste Management, Environmental Management, Financial Review and also included are copies of the financial statements.

  5. Atomic Energy of Canada Limited, annual report, 1995-1996

    International Nuclear Information System (INIS)

    1996-01-01

    The 1996 Annual Report of Atomic Energy of Canada Ltd. (AECL) is published and submitted to the Honourable member of Parliament, Minister of Natural Resources. Included in this report are messages from Marketing and Commercial Operation, Product Development, i e.CANDU and Research Reactors, CANDU research, Waste Management, Environmental Management, Financial Review and also included are copies of the financial statements

  6. Atomic Energy of Canada Limited annual report 1985-86

    International Nuclear Information System (INIS)

    1986-01-01

    The annual report of Atomic Energy of Canada Limited for the fiscal year ended March 31, 1986 covers the following subjects: report from the chairman and the president; research company; CANDU operations; radiochemical company; employee performance; nuclear Canada; Financial section; and board of directors and officers

  7. Environment. 1990-2001. International Atomic Energy Agency publications

    International Nuclear Information System (INIS)

    2001-05-01

    This catalog lists all sales publications of the International Atomic Energy Agency dealing with the Environment, and issued during the period 1 January 1990 - 30 April 2001. Most publications are issued in English, though some are also available in other languages. These are noted in the catalogue

  8. International Atomic Energy Agency Publications. Catalogue 1986-1999

    International Nuclear Information System (INIS)

    2000-11-01

    This catalogue lists all sales publications of the International Atomic Energy Agency issued from 1986 up to the end of 1999 and still available. Some earlier titles which form part of an established series or are still considered important have also been included. The catalogue is in CD-ROM format

  9. Annual Report 2003 of the Institute of Atomic Energy

    International Nuclear Information System (INIS)

    2004-06-01

    Annual report of the Institute of Atomic Energy, Swierk (PL), described the results of the research work carried out at the Institute in 2003 year. The report contains detailed information on technical and research studies developed by all Institute Departments and Laboratories

  10. Current trend of atomic energy development in Japan - 2

    International Nuclear Information System (INIS)

    Cho, M.; Yang, M. H.; Yun, S. W.

    1999-01-01

    The atomic energy power generation is recognized to be important to solve the problems of the competitive relations among the Asian developing countries due to the increasing dependency on the crude oil produced in the Middle East and the insecurity of transport route of the oil. The reorganization and inauguration of JNC(former PNC) has been carried out for the development of liquid metal reactor and related fuel cycle technology as the national development project to prevent the global green house effect and to continue the economic development. The construction of light water reactor, the utilization of plutonium in light water reactor and the enrichment and reprocessing of spent fuel of light water reactor are classified as proven technologies which will be covered by the industry. The government will lead to the environment favorable for introduction of the atomic energy and will monitor the situation. The specifics of atomic energy development project and the development system for the 21th century will be contained in the long term atomic energy development plan which will be completed by 2000 and the reorganization operation has been initiated. (author). 41 refs., 5 tabs., 30 figs

  11. Inelastic collisions of medium energy atomic elements. Qualitative model of energy losses during collisions

    International Nuclear Information System (INIS)

    Pustovit, A.N.

    2006-01-01

    A new approach to the theoretical description of energy losses of atomic particle of medium energy during their interaction with the substance is proposed. The corner-stone of this approach is the supposition that all of the collision processes have inelastic nature during particle movement through the substance, while the calculation of the atomic particles braking is based on the law of their dispersion and the laws of energy and momentum conservation at the inelastic collisions. It is shown that inelastic atomic collision there are three dispersion zones for the only potential interaction with different laws, which characterize energy losses. The application conditions of this approach are determined [ru

  12. Nanodisc-Targeted STD NMR Spectroscopy Reveals Atomic Details of Ligand Binding to Lipid Environments.

    Science.gov (United States)

    Muñoz-García, Juan C; Inacio Dos Reis, Rosana; Taylor, Richard J; Henry, Alistair J; Watts, Anthony

    2018-05-18

    Saturation transfer difference (STD) NMR spectroscopy is one of the most popular ligand-based NMR techniques for the study of protein-ligand interactions. This is due to its robustness and the fact that it is focused on the signals of the ligand, without any need for NMR information on the macromolecular target. This technique is most commonly applied to systems involving different types of ligands (e.g., small organic molecules, carbohydrates or lipids) and a protein as the target, in which the latter is selectively saturated. However, only a few examples have been reported where membrane mimetics are the macromolecular binding partners. Here, we have employed STD NMR spectroscopy to investigate the interactions of the neurotransmitter dopamine with mimetics of lipid bilayers, such as nanodiscs, by saturation of the latter. In particular, the interactions between dopamine and model lipid nanodiscs formed either from charged or zwitterionic lipids have been resolved at the atomic level. The results, in agreement with previous isothermal titration calorimetry studies, show that dopamine preferentially binds to negatively charged model membranes, but also provide detailed atomic insights into the mode of interaction of dopamine with membrane mimetics. Our findings provide relevant structural information for the design of lipid-based drug carriers of dopamine and its structural analogues and are of general applicability to other systems. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  13. Multiloop atom interferometer measurements of chameleon dark energy in microgravity

    Science.gov (United States)

    Chiow, Sheng-wey; Yu, Nan

    2018-02-01

    Chameleon field is one of the promising candidates of dark energy scalar fields. As in all viable candidate field theories, a screening mechanism is implemented to be consistent with all existing tests of general relativity. The screening effect in the chameleon theory manifests its influence limited only to the thin outer layer of a bulk object, thus producing extra forces orders of magnitude weaker than that of the gravitational force of the bulk. For pointlike particles such as atoms, the depth of screening is larger than the size of the particle, such that the screening mechanism is ineffective and the chameleon force is fully expressed on the atomic test particles. Extra force measurements using atom interferometry are thus much more sensitive than bulk mass based measurements, and indeed have placed the most stringent constraints on the parameters characterizing chameleon field. In this paper, we present a conceptual measurement approach for chameleon force detection using atom interferometry in microgravity, in which multiloop atom interferometers exploit specially designed periodic modulation of chameleon fields. We show that major systematics of the dark energy force measurements, i.e., effects of gravitational forces and their gradients, can be suppressed below all hypothetical chameleon signals in the parameter space of interest.

  14. Tenth act amending the German atomic energy act

    International Nuclear Information System (INIS)

    Heller, W.

    2009-01-01

    On January 14, 2009, the German federal government introduced into parliament the 10th Act Amending the Atomic Energy Act. In the first reading in the federal parliament, Federal Minister for the Environment Gabriel emphasized 2 main points: Intensified protection of nuclear facilities and of transports of radioactive substances against unauthorized interventions; transfer by law to the Federal Office for Radiological Protection (BfS) of decommissioning of the Asse mine. Reliability review: The amendment to Sec.12 b of the Atomic Energy Act is to meet the different safety and security conditions after the terrorist attacks on September 11, 2001 in the United States and other terrorist activities afterwards (London, Madrid) also with respect to hazards arising to nuclear facilities and nuclear transports. The bill must be seen in conjunction with the Ordinance on Reliability Reviews under the Atomic Energy Act dated July 1, 1999 which covers reviews of reliability of persons holding special responsibilities. Asse II mine: The competence of the Federal Office for Radiological Protection is achieved by an amendment to Sec.23, Para.1, Number 2, Atomic Energy Act, in which the words ''and for the Asse II mine'' are added after the word ''waste.'' Further proceedings depend on the additional provision in a new Sec.57 b, Atomic Energy Act. Accordingly, the operation and decommissioning of the Asse II mine are subject to the regulations applicable to facilities of the federation pursuant to Sec.9a, Para.3. In this way, Asse II is given the same legal status as the federal waste management facilities. Moreover, it is stipulated that the mine is to be shut down immediately. (orig.)

  15. The No.I. Law (1980) on atomic energy

    International Nuclear Information System (INIS)

    1980-01-01

    The Atomic Energy Law regulates all aspects of the use and application of nuclear energy. The four basic principles of the law are as follows: 1. Nuclear energy can be applied only for peaceful purposes, and this must be promoted by effective international cooperation. 2. The materials, equipment and establishments serving the application of nuclear energy are generally in social ownership. 3. Nuclear energy can be applied only with satisfactory safety precautions, and its uses are determined and regularly controlled by the state. 4. The compensation of the damages caused by nuclear energy applications is regulated by special rules. The enforcement of the law and the direction, control and development of the application of nuclear energy is the responsibility of the Council of Ministers. (R.J.)

  16. Atomic-orbital expansion model for describing ion-atom collisions at intermediate and low energies

    International Nuclear Information System (INIS)

    Lin, C.D.; Fritsch, W.

    1983-01-01

    In the description of inelastic processes in ion-atom collisions at moderate energies, the semiclassical close-coupling method is well established as the standard method. Ever since the pioneering work on H + + H in the early 60's, the standard procedure is to expand the electronic wavefunction in terms of molecular orbitals (MO) or atomic orbitals (AO) for describing collisions at, respectively, low or intermediate velocities. It has been recognized since early days that traveling orbitals are needed in the expansions in order to represent the asymptotic states in the collisions correctly. While the adoption of such traveling orbitals presents no conceptual difficulties for expansions using atomic orbitals, the situation for molecular orbitals is less clear. In recent years, various forms of traveling MO's have been proposed, but conflicting results for several well-studied systems have been reported

  17. Energy exchange in thermal energy atom-surface scattering: impulsive models

    International Nuclear Information System (INIS)

    Barker, J.A.; Auerbach, D.J.

    1979-01-01

    Energy exchange in thermal energy atom surface collisions is studied using impulsive ('hard cube' and 'hard sphere') models. Both models reproduce the observed nearly linear relation between outgoing and incoming energies. In addition, the hard-sphere model accounts for the widths of the outcoming energy distributions. (Auth.)

  18. Converging ligand-binding free energies obtained with free-energy perturbations at the quantum mechanical level.

    Science.gov (United States)

    Olsson, Martin A; Söderhjelm, Pär; Ryde, Ulf

    2016-06-30

    In this article, the convergence of quantum mechanical (QM) free-energy simulations based on molecular dynamics simulations at the molecular mechanics (MM) level has been investigated. We have estimated relative free energies for the binding of nine cyclic carboxylate ligands to the octa-acid deep-cavity host, including the host, the ligand, and all water molecules within 4.5 Å of the ligand in the QM calculations (158-224 atoms). We use single-step exponential averaging (ssEA) and the non-Boltzmann Bennett acceptance ratio (NBB) methods to estimate QM/MM free energy with the semi-empirical PM6-DH2X method, both based on interaction energies. We show that ssEA with cumulant expansion gives a better convergence and uses half as many QM calculations as NBB, although the two methods give consistent results. With 720,000 QM calculations per transformation, QM/MM free-energy estimates with a precision of 1 kJ/mol can be obtained for all eight relative energies with ssEA, showing that this approach can be used to calculate converged QM/MM binding free energies for realistic systems and large QM partitions. © 2016 The Authors. Journal of Computational Chemistry Published by Wiley Periodicals, Inc. © 2016 The Authors. Journal of Computational Chemistry Published by Wiley Periodicals, Inc.

  19. Converging ligand‐binding free energies obtained with free‐energy perturbations at the quantum mechanical level

    Science.gov (United States)

    Olsson, Martin A.; Söderhjelm, Pär

    2016-01-01

    In this article, the convergence of quantum mechanical (QM) free‐energy simulations based on molecular dynamics simulations at the molecular mechanics (MM) level has been investigated. We have estimated relative free energies for the binding of nine cyclic carboxylate ligands to the octa‐acid deep‐cavity host, including the host, the ligand, and all water molecules within 4.5 Å of the ligand in the QM calculations (158–224 atoms). We use single‐step exponential averaging (ssEA) and the non‐Boltzmann Bennett acceptance ratio (NBB) methods to estimate QM/MM free energy with the semi‐empirical PM6‐DH2X method, both based on interaction energies. We show that ssEA with cumulant expansion gives a better convergence and uses half as many QM calculations as NBB, although the two methods give consistent results. With 720,000 QM calculations per transformation, QM/MM free‐energy estimates with a precision of 1 kJ/mol can be obtained for all eight relative energies with ssEA, showing that this approach can be used to calculate converged QM/MM binding free energies for realistic systems and large QM partitions. © 2016 The Authors. Journal of Computational Chemistry Published by Wiley Periodicals, Inc. PMID:27117350

  20. Atomic and electronic structures of a-SiC:H from tight-binding molecular dynamics

    CERN Document Server

    Ivashchenko, V I; Shevchenko, V I; Ivashchenko, L A; Rusakov, G V

    2003-01-01

    The atomic and electronic properties of amorphous unhydrogenated (a-SiC) and hydrogenated (a-SiC:H) silicon carbides are studied using an sp sup 3 s sup * tight-binding force model with molecular dynamics simulations. The parameters of a repulsive pairwise potential are determined from ab initio pseudopotential calculations. Both carbides are generated from dilute vapours condensed from high temperature, with post-annealing at low temperature for a-SiC:H. A plausible model for the inter-atomic correlations and electronic states in a-SiC:H is suggested. According to this model, the formation of the amorphous network is weakly sensitive to the presence of hydrogen. Hydrogen passivates effectively only the weak bonds of threefold-coordinated atoms. Chemical ordering is very much affected by the cooling rate and the structure of the high-temperature vapour. The as-computed characteristics are in rather good agreement with the results for a-SiC and a-Si:H from ab initio calculations.

  1. Predicting Ligand Binding Sites on Protein Surfaces by 3-Dimensional Probability Density Distributions of Interacting Atoms

    Science.gov (United States)

    Jian, Jhih-Wei; Elumalai, Pavadai; Pitti, Thejkiran; Wu, Chih Yuan; Tsai, Keng-Chang; Chang, Jeng-Yih; Peng, Hung-Pin; Yang, An-Suei

    2016-01-01

    Predicting ligand binding sites (LBSs) on protein structures, which are obtained either from experimental or computational methods, is a useful first step in functional annotation or structure-based drug design for the protein structures. In this work, the structure-based machine learning algorithm ISMBLab-LIG was developed to predict LBSs on protein surfaces with input attributes derived from the three-dimensional probability density maps of interacting atoms, which were reconstructed on the query protein surfaces and were relatively insensitive to local conformational variations of the tentative ligand binding sites. The prediction accuracy of the ISMBLab-LIG predictors is comparable to that of the best LBS predictors benchmarked on several well-established testing datasets. More importantly, the ISMBLab-LIG algorithm has substantial tolerance to the prediction uncertainties of computationally derived protein structure models. As such, the method is particularly useful for predicting LBSs not only on experimental protein structures without known LBS templates in the database but also on computationally predicted model protein structures with structural uncertainties in the tentative ligand binding sites. PMID:27513851

  2. A hierarchical coarse-grained (all-atom to all residue) approach to peptides (P1, P2) binding with a graphene sheet

    Science.gov (United States)

    Pandey, Ras; Kuang, Zhifeng; Farmer, Barry; Kim, Sang; Naik, Rajesh

    2012-02-01

    Recently, Kim et al. [1] have found that peptides P1: HSSYWYAFNNKT and P2: EPLQLKM bind selectively to graphene surfaces and edges respectively which are critical in modulating both the mechanical as well as electronic transport properties of graphene. Such distinctions in binding sites (edge versus surface) observed in electron micrographs were verified by computer simulation by an all-atomic model that captures the pi-pi bonding. We propose a hierarchical approach that involves input from the all-atom Molecular Dynamics (MD) study (with atomistic detail) into a coarse-grained Monte Carlo simulation to extend this study further to a larger scale. The binding energy of a free amino acid with the graphene sheet from all-atom simulation is used in the interaction parameter for the coarse-grained approach. Peptide chain executes its stochastic motion with the Metropolis algorithm. We investigate a number of local and global physical quantities and find that peptide P1 is likely to bind more strongly to graphene sheet than P2 and that it is anchored by three residues ^4Y^5W^6Y. [1] S.N. Kim et al J. Am. Chem. Soc. 133, 14480 (2011).

  3. Development of a microlesson in teaching energy levels of atoms

    Science.gov (United States)

    Rodriguez, Cherilyn A.; Buan, Amelia T.

    2018-01-01

    Energy levels of atoms is one of the difficult topics in understanding atomic structure of matter. It appears tobe abstract, theoretical and needs visual representation and images. Hence, in this study a microlesson in teaching the high school chemistry concept on the energy levels of atoms is developed and validated. The researchers utilized backward curriculum design in planning the microlesson to meet the standards of the science K-12 curriculum. The planning process of the microlesson involved a) Identifying the learning competencies in K-12 science curriculum b) write learning objectives c) planning of assessment tools d) making a storyboard e) designing the microlesson and validate and revise the microlesson. The microlesson made use of varied resources in the internet from which the students accessed and collected information about energy levels of atoms. Working in groups, the students synthesized the information on how and why fireworks produce various colors of light through a post card. Findings of the study showed that there was an increase of achievement in learning the content and the students were highly motivated to learn chemistry. Furthermore, the students perceived that the microlesson helped them to understand the chemistry concept through the use of appropriate multimedia activities.

  4. Utilization of atomic energy in Asia and nuclear nonproliferation system

    International Nuclear Information System (INIS)

    Ishii, Makoto

    1995-01-01

    The economical growth in East Asia is conspicuous as it was called East Asian Miracle, and also the demand of energy increased rapidly. The end of Cold War created the condition for the further development in this district. Many countries advanced positively the plan of atomic energy utilization, and it can be said that the smooth progress of atomic energy utilization is the key for the continuous growth in this district in view of the restriction of petroleum resources and its price rise in future and the deterioration of global environment. The nuclear nonproliferation treaty (NPT) has accomplished large role, but also its limitation became clear. At present, there is not the local security system in Asia, but in order that the various countries in Asia make the utilization of atomic energy and the security compatible, it is useful to jointly develop safety technology, execute security measures and form the nuclear fuel cycle as Asia. Energy and environmental problems in Asia are reported. Threat is essentially intention and capability, and the regulation only by capability regardless of intention brings about unrealistic result. The limitation of the NPT is discussed. The international relation of interdependence deepends after Cold War, and the security in Asia after Cold War is considered. As the mechanism of forming the nuclear fuel cycle for whole Asia, it is desirable to realize ASIATOM by accumulating the results of possible cooperation. (K.I.)

  5. White paper on atomic energy in 1993. 1993 ed.

    International Nuclear Information System (INIS)

    1993-01-01

    In order to cope with the problem of how to secure the energy which is the base of mankind survival in the continuing increase of global population, the research and development of atomic energy and new energies, energy conservation and various other efforts have been carried out. But still the stable supply and securing of energy are important policy subjects. It is the policy of the new Hosokawa Cabinet to inherit important basic policies including energy policy. The nuclear power that generates about 30% of Japanese electric power is indispensable for stable energy supply, and its development and utilization are advanced steadily. The peaceful utilization of the plutonium produced in nuclear reactors by the establishment of nuclear fuel cycle must be advanced. For the purpose, the construction of Rokkasho fuel reprocessing plant and the development of the FBR 'Monju' are in progress. Also advance has been made in the fields of radiation cancer therapy and nuclear fusion. In this book, the general remarks on the circumstances surrounding atomic energy, nuclear power generation, the securing of safety and envrionment preservation, nuclear fuel cycle, the development of new power reactors and others are reported. The related materials are attached. (K.I.)

  6. Simulation of core-level binding energy shifts in germanium-doped lead telluride crystals

    International Nuclear Information System (INIS)

    Zyubin, A.S.; Dedyulin, S.N.; Yashina, L.V.; Shtanov, V.I.

    2007-01-01

    To simulate the changes in core-level binding energies in germanium-doped lead telluride, cluster calculations of the changes in the electrostatic potential at the corresponding centers have been performed. Different locations of the Ge atom in the crystal bulk have been considered: near vacancies, near another dopant site, and near the surface. For calculating the potential in the clusters that model the bulk and the surface of the lead telluride crystal (c-PbTe), the electron density obtained in the framework of the Hartree-Fock and hybrid density functional theory (DFT) methods has been used [ru

  7. Accurate core-electron binding energy shifts from density functional theory

    International Nuclear Information System (INIS)

    Takahata, Yuji; Marques, Alberto Dos Santos

    2010-01-01

    Current review covers description of density functional methods of calculation of accurate core-electron binding energy (CEBE) of second and third row atoms; applications of calculated CEBEs and CEBE shifts (ΔCEBEs) in elucidation of topics such as: hydrogen-bonding, peptide bond, polymers, DNA bases, Hammett substituent (σ) constants, inductive and resonance effects, quantitative structure activity relationship (QSAR), and solid state effect (WD). This review limits itself to works of mainly Chong and his coworkers for the period post-2002. It is not a fully comprehensive account of the current state of the art.

  8. Free energy calculations on Transthyretin dissociation and ligand binding from Molecular Dynamics Simulations

    DEFF Research Database (Denmark)

    Sørensen, Jesper; Hamelberg, Donald; McCammon, J. Andrew

    experimental results have helped to explain this aberrant behavior of TTR, however, structural insights of the amyloidgenic process are still lacking. Therefore, we have used all-atom molecular dynamics simulation and free energy calculations to study the initial phase of this process. We have calculated......Many questions about the nature of aggregation and the proteins that are involved in these events are still left unanswered. One of the proteins that is known to form amyloids is Transthyretine (TTR), the secondary transporter of thyroxine and transporter of retinol-binding-protein. Several...

  9. Swiss association for atomic energy (SVA/ASPEA)

    International Nuclear Information System (INIS)

    Anon.

    1985-01-01

    A report of the general assembly of the Swiss association for atomic energy held on 4th June 1985. The president, Alain Colomb, called for a 'second electrification' of the country to free Switzerland from a dependence on petroleum. Nuclear energy is necessary to combat air pollution. An invited speaker, Manuel Poyatos of the 'Electricite de France', recounted the French experience of restructuring their electric production system; particular the increasing contribution of nuclear energy and the beneficial effects on the environment. (G.T.H.)

  10. Accurate Estimation of the Standard Binding Free Energy of Netropsin with DNA

    Directory of Open Access Journals (Sweden)

    Hong Zhang

    2018-01-01

    Full Text Available DNA is the target of chemical compounds (drugs, pollutants, photosensitizers, etc., which bind through non-covalent interactions. Depending on their structure and their chemical properties, DNA binders can associate to the minor or to the major groove of double-stranded DNA. They can also intercalate between two adjacent base pairs, or even replace one or two base pairs within the DNA double helix. The subsequent biological effects are strongly dependent on the architecture of the binding motif. Discriminating between the different binding patterns is of paramount importance to predict and rationalize the effect of a given compound on DNA. The structural characterization of DNA complexes remains, however, cumbersome at the experimental level. In this contribution, we employed all-atom molecular dynamics simulations to determine the standard binding free energy of DNA with netropsin, a well-characterized antiviral and antimicrobial drug, which associates to the minor groove of double-stranded DNA. To overcome the sampling limitations of classical molecular dynamics simulations, which cannot capture the large change in configurational entropy that accompanies binding, we resort to a series of potentials of mean force calculations involving a set of geometrical restraints acting on collective variables.

  11. Low energy collisions of spin-polarized metastable argon atoms with ground state argon atoms

    Science.gov (United States)

    Taillandier-Loize, T.; Perales, F.; Baudon, J.; Hamamda, M.; Bocvarski, V.; Ducloy, M.; Correia, F.; Fabre, N.; Dutier, G.

    2018-04-01

    The collision between a spin-polarized metastable argon atom in Ar* (3p54s, 3P2, M = +2) state slightly decelerated by the Zeeman slower-laser technique and a co-propagating thermal ground state argon atom Ar (3p6, 1S0), both merged from the same supersonic beam, but coming through adjacent slots of a rotating disk, is investigated at the center of mass energies ranging from 1 to 10 meV. The duration of the laser pulse synchronised with the disk allows the tuning of the relative velocity and thus the collision energy. At these sub-thermal energies, the ‘resonant metastability transfer’ signal is too small to be evidenced. The explored energy range requires using indiscernibility amplitudes for identical isotopes to have a correct interpretation of the experimental results. Nevertheless, excitation transfers are expected to increase significantly at much lower energies as suggested by previous theoretical predictions of potentials 2g(3P2) and 2u(3P2). Limits at ultra-low collisional energies of the order of 1 mK (0.086 μeV) or less, where gigantic elastic cross sections are expected, will also be discussed. The experimental method is versatile and could be applied using different isotopes of Argon like 36Ar combined with 40Ar, as well as other rare gases among which Krypton should be of great interest thanks to the available numerous isotopes present in a natural gas mixture.

  12. Atomic energy, environment and energy conservation in Eastern Europe

    International Nuclear Information System (INIS)

    Kanno, Koko

    1990-01-01

    About 12 % of generated electric power is the nuclear power in Eastern European countries. Generally electric power is short in these countries, and as the countermeasures for environment, the promotion of nuclear power generation is considered. However, the public opinion opposing it is also strong. The situation in respective countries is briefly discussed. The prevention of warming of the earth and the reduction of carbon dioxide gas release are the largest environmental problems discussed in western countries, but in Eastern European countries, the far more primitive problem of the damage due to SO 2 is serious. Notwithstanding high sulfur brown coal is the main fuel, the installation of desulfurizing facilities has been neglected. The demand for the countermeasures to environmental pollution by people has become strong. The energy efficiency in Eastern European countries is poor, and it is one of the causes of environmental pollution. The industrial structure is centering around heavy industries which consume much energy, the energy loss arises due to the delay of equipment modernization, and the energy is cheap, so its saving is neglected. Energy conservation is important. (K.I.)

  13. Citizen awareness level of the peaceful uses of atomic energy

    International Nuclear Information System (INIS)

    Elfawairs, Kh.; Elammari, M.

    2015-01-01

    This paper aims to know the level of public awareness of different types of people, about the peaceful application of nuclear energy. A questionnaire about this subject was distributed randomly in different cities in Libya; the questionnaire was targeting males and females with different educational levels. From data obtained and which was analyzed statistically comparing the educational level with the level of awareness. It was found that the highest contribution was for those holding university degrees 43%. Data analysis showed that 50.5% of the total number do not know what is meant by the peaceful uses of atomic energy and this significantly related to the educational level at significance level ∝=0.01. Concerning the assessment of environmental awareness of the Libyan citizens, 83.3% said that it is weak and the relation is not signification. Concerning the best ways of making people more aware of atomic energy and its peaceful uses 63.9% said all possible means should be used and 21.3% said practical application is the best way, where 13.9% said that they don't know. About the uses of nuclear technology in different fields, the participants had different views. From this study it was concluded that a%. Warnaco programs concerning the peaceful uses of atomic energy should be intensified.(author)

  14. Low-energy positron interactions with atoms and molecules

    International Nuclear Information System (INIS)

    Surko, C M; Gribakin, G F; Buckman, S J

    2005-01-01

    This paper is a review of low-energy positron interactions with atoms and molecules. Processes of interest include elastic scattering, electronic and vibrational excitation, ionization, positronium formation and annihilation. An overview is presented of the currently available theoretical and experimental techniques to study these phenomena, including the use of trap-based positron beam sources to study collision processes with improved energy resolution. State-resolved measurements of electronic and vibrational excitation cross sections and measurement of annihilation rates in atoms and molecules as a function of incident positron energy are discussed. Where data are available, comparisons are made with analogous electron scattering cross sections. Resonance phenomena, common in electron scattering, appear to be less common in positron scattering. Possible exceptions include the sharp onsets of positron-impact electronic and vibrational excitation of selected molecules. Recent energy-resolved studies of positron annihilation in hydrocarbons containing more than a few carbon atoms provide direct evidence that vibrational Feshbach resonances underpin the anomalously large annihilation rates observed for many polyatomic species. We discuss open questions regarding this process in larger molecules, as well as positron annihilation in smaller molecules where the theoretical picture is less clear. (topical review)

  15. Atomic column resolved electron energy-loss spectroscopy

    International Nuclear Information System (INIS)

    Duscher, G.; Pennycook, S.J.; Browning, N.D.

    1998-01-01

    Spatially resolved electron energy-loss spectroscopy (EELS) is rapidly developing into a unique and powerful tool to characterize internal interfaces. Because atomic column resolved Z-contrast imaging can be performed simultaneously with EELS in the scanning transmission electron microscope, this combination allows the atomic structure to be correlated with the electronic structure, and thus the local properties of interfaces or defects can be determined directly. However, the ability to characterize interfaces and defects at that level requires not only high spatial resolution but also the exact knowledge of the beam location, from where the spectrum is obtained. Here we discuss several examples progressing from cases where the limitation in spatial resolution is given by the microscopes or the nature of the sample, to one example of impurity atoms at a grain boundary, which show intensity and fine structure changes from atomic column to atomic column. Such data can be interpreted as changes in valence of the impurity, depending on its exact site in the boundary plane. Analysis ofthis nature is a valuable first step in understanding the microscopic structural, optical and electronic properties of materials. (orig.)

  16. Department of Atomic Energy: Annual report, 1983-84

    International Nuclear Information System (INIS)

    1984-01-01

    The annual report of the Department of Atomic Energy for the financial year 1983-84 describes its activities under the headings: Nuclear Power, Research and Development, Public Sector Undertakings, and Other Activities. The report surveys: (1) the performance of nuclear power plants at Tarapur, Kota and Kalpakkam, heavy water plants, fuel fabrication and reprocessing plants, and waste management facilities, (2) the research and development activities of Bhabha Atomic Research Centre at Bombay and its constituent units at various locations in the country, Reactor Research Centre at Kalpakkam, the aided institutes, namely, Tata Institute of Fundamental Research and Tata Memorial Centre, both at Bombay, and Saha Institute of Nuclear Physics at Calcutta, (3) performance of public sector undertakings: Indian Rare Earths Ltd., Uranium Corporation of India Ltd., and Electronics Corporation of India Ltd., (4) progress of nuclear power projects at Narora and Kakrapar, Orissa Sand Complex Project, MHD project at Tiruchirapalli, DHRUVA (formerly known as R-5) project at Bombay, Fast Breeder Test Reactor and 500 MW Prototype Fast Breeder Reactor projects at Kalpakkam, and heavy water projects at Thal-Vaishet and Manuguru, and (5) other activities including technology transfer; training; service to industry, agriculture and medicine in use of radioisotopes and radiation, export of radioisotopes, allied products and nuclear instruments; international relations; countrywide radiation safety programme, exploration of atomic minerals; information and publicity etc. An Atomic Energy Regulatory Board was established during the report year for the special purpose of carrying out regulatory and safety functions specified in the Atomic Energy Act of the Government of India. (M.G.B.)

  17. Department of Atomic Energy, annual report, 1980-81

    International Nuclear Information System (INIS)

    1981-01-01

    The annual report of the Department of Atomic Energy (DAE) of the Government of India for the period of the fiscal year 1980-81 surveys the work of DAE, its various constituent units and aided institutions. The main thrust of the DAE's programme in the country is directed towards peaceful uses of atomic energy - primarily for generation of electric power and also for application of radioisotopes and radiation in medicine, agriculture, and industry. The research and development (R and D) activities of the Bhabha Atomic Research Centre (BARC) at Bombay, the major R and D establishment of DAE, in the fields of nuclear physics, solid state physics, chemistry and materials science, isotope and radiation applications, reactor technology and radioactive waste management are described in detail. The R and D activities of the Reactor Research Centre at Kalpakkam and the aided institutions such as the Tata Institute of Fundamental Research and the Tata Memorial Centre, both at Bombay, and the Saha Institute of Nuclear Physics at Calcutta are reviewed in brief. Progress of the MHD project, the heavy water plant projects, the thermal research reactor R-5 project at BARC and nuclear power plant projects at Narora and Kalpakkam is surveyed. Performance of industrial production units such as nuclear power stations at Tarapur and Kota, the Nuclear Fuel Complex at Hyderabad, Atomic Minerals Division, ISOMED - the radiation sterilisation plant for medical products, the Indian Rare Earths Ltd., the Electronics Corporation of India Ltd., and the Uranium Corporation of India Ltd., is reported. India's participation in the activities of the International Atomic Energy Agency and collaboration with other countries are also mentioned. (M.G.B.)

  18. Evaluation of binding energies by using quantum mechanical methods

    International Nuclear Information System (INIS)

    Postolache, Cristian; Matei, Lidia; Postolache, Carmen

    2002-01-01

    Evaluation of binding energies (BE) in molecular structure is needed for modelling chemical and radiochemical processes by quantum-chemical methods. An important field of application is evaluation of radiolysis and autoradiolysis stability of organic and inorganic compounds as well as macromolecular structures. The current methods of calculation do not allow direct determination of BE but only of total binding energies (TBE) and enthalpies. BEs were evaluated indirectly by determining the homolytic dissociation energies. The molecular structures were built and geometrically optimized by the molecular mechanics methods MM+ and AMBER. The energy minimizations were refined by semi-empirical methods. Depending on the chosen molecular structure, the CNDO, INDO, PM3 and AM1 methods were used. To reach a high confidence level the minimizations were done for gradients lower than 10 -3 RMS. The energy values obtained by the difference of the fragment TBLs, of the transition states and initial molecular structures, respectively, were associated to the hemolytic fragmentation energy and BE, respectively. In order to evaluate the method's accuracy and to establish the application fields of the evaluation methods, the obtained values of BEs were compared with the experimental data taken from literature. To this goal there were built, geometrically optimized by semi-empirical methods and evaluated the BEs for 74 organic and inorganic compounds (alkanes, alkene, alkynes, halogenated derivatives, alcohols, aldehydes, ketones, carboxylic acids, nitrogen and sulfur compounds, water, hydrogen peroxide, ammonia, hydrazine, etc. (authors)

  19. Three-atom clusters

    International Nuclear Information System (INIS)

    Pen'kov, F.M.

    1998-01-01

    The Born-Oppenheimer approximation is used to obtain an equation for the effective interaction in three atoms bound by a single electron. For low binding energies in an 'electron + atom' pair, long-range forces arise between the atoms, leading to bound states when the size of the three-atom cluster is a few tens of angstrom. A system made of alkali-metal atoms is considered as an example

  20. Training courses run by the Department of Atomic Energy, India

    International Nuclear Information System (INIS)

    1981-01-01

    The Department of Atomic Energy (DAE), India, conducts a large number of courses covering a variety of fields, mainly concerned with nuclear energy and its applications. These courses are : (1) a comprehensive multidisciplinary course in nuclear sciences and engineering, (2) courses in safety aspects of: (a) the medical uses of radioisotopes, (b) research applications of ionising radiations, (c) the industrial applications of radiation sources, and (d) industrial radiography; (3) industrial radiographer's certification course, (4) course in hospital physics and radiological physics, (5) diploma course in radiation medicine, (6) courses in operation and maintenance of: (a) research reactors and facilities, (b) nuclear power reactors, and (7) course in exploration of atomic minerals. Detailed information on these courses, covering institutions of DAE conducting them, duration, academic requirements for admission to them, method of adimission, detailed syllabus, and general information such as fees, accommodation, stipend if any, etc. is given. (M.G.B.)

  1. Managing vital records in the Ghana Atomic Energy Commission

    International Nuclear Information System (INIS)

    Osei, Mary Mavis

    2004-05-01

    Several vital records can be found within the Ghana Atomic Energy Commission. Some of these records include confidential files on staff and general purpose files on staff, specialised subject files on IAEA, FAO, UN agencies etc, records on agreements from memorandum of understanding between the commission and other organisations, legislative instruments establishing the commission and its institutes and research publications. The study critically examined how these vital records at the Ghana Atomic Energy Commission were managed with the view of identifying problems and to propose actions for improvement. The specific objectives of the study was to examine methods of storage, security measures put in place to manage vital records, committment of management and staff to these measures, quality of records staff and vital records policy. Recommendations have been provided to help in the efficient and effective management of records in the commission. (A.B.)

  2. Local energy equation for two-electron atoms and relation between kinetic energy and electron densities

    International Nuclear Information System (INIS)

    March, N.H.

    2002-08-01

    In early work, Dawson and March [J. Chem. Phys. 81, 5850 (1984)] proposed a local energy method for treating both Hartree-Fock and correlated electron theory. Here, an exactly solvable model two-electron atom with pure harmonic interactions is treated in its ground state in the above context. A functional relation between the kinetic energy density t(r) at the origin r=0 and the electron density p(r) at the same point then emerges. The same approach is applied to the Hookean atom; in which the two electrons repel with Coulombic energy e 2 /r 12 , with r 12 the interelectronic separation, but are still harmonically confined. Again the kinetic energy density t(r) is the focal point, but now generalization away from r=0 is also effected. Finally, brief comments are added about He-like atomic ions in the limit of large atomic number. (author)

  3. Single atom spectroscopy: Decreased scattering delocalization at high energy losses, effects of atomic movement and X-ray fluorescence yield.

    Science.gov (United States)

    Tizei, Luiz H G; Iizumi, Yoko; Okazaki, Toshiya; Nakanishi, Ryo; Kitaura, Ryo; Shinohara, Hisanori; Suenaga, Kazu

    2016-01-01

    Single atom localization and identification is crucial in understanding effects which depend on the specific local environment of atoms. In advanced nanometer scale materials, the characteristics of individual atoms may play an important role. Here, we describe spectroscopic experiments (electron energy loss spectroscopy, EELS, and Energy Dispersed X-ray spectroscopy, EDX) using a low voltage transmission electron microscope designed towards single atom analysis. For EELS, we discuss the advantages of using lower primary electron energy (30 keV and 60 keV) and higher energy losses (above 800 eV). The effect of atomic movement is considered. Finally, we discuss the possibility of using atomically resolved EELS and EDX data to measure the fluorescence yield for X-ray emission. Copyright © 2015 Elsevier B.V. All rights reserved.

  4. Single atom spectroscopy: Decreased scattering delocalization at high energy losses, effects of atomic movement and X-ray fluorescence yield

    International Nuclear Information System (INIS)

    Tizei, Luiz H.G.; Iizumi, Yoko; Okazaki, Toshiya; Nakanishi, Ryo; Kitaura, Ryo; Shinohara, Hisanori; Suenaga, Kazu

    2016-01-01

    Single atom localization and identification is crucial in understanding effects which depend on the specific local environment of atoms. In advanced nanometer scale materials, the characteristics of individual atoms may play an important role. Here, we describe spectroscopic experiments (electron energy loss spectroscopy, EELS, and Energy Dispersed X-ray spectroscopy, EDX) using a low voltage transmission electron microscope designed towards single atom analysis. For EELS, we discuss the advantages of using lower primary electron energy (30 keV and 60 keV) and higher energy losses (above 800 eV). The effect of atomic movement is considered. Finally, we discuss the possibility of using atomically resolved EELS and EDX data to measure the fluorescence yield for X-ray emission.

  5. Environment, 1986-1997. International Atomic Energy Agency publications

    International Nuclear Information System (INIS)

    1998-04-01

    This catalogue lists all sales publications of the International Atomic Energy Agency dealing with Environment and issued during the period of 1986-1997. Some earlier titles which form part of an established series or are still considered of importance have been included. Most publications are in English. Proceedings of conferences, symposia and panels of experts may contain papers in languages other than English, but all of these papers have abstracts in English

  6. Earth sciences. 1990-2001. International Atomic Energy Agency publications

    International Nuclear Information System (INIS)

    2001-05-01

    This catalogue lists all sales publications of the International Atomic Energy Agency dealing with Earth Sciences and issued during the period 1 January 1990 - 31 May 2001. Most publications are issued in English, though some are also available in other languages. This is noted as A for Arabic, C for Chinese, E for English, F for French, R for Russian and S for Spanish before the relevant ISBN number

  7. Radiation protection and atomic energy legislation in the Nordic countries

    International Nuclear Information System (INIS)

    Persson, L.

    1987-01-01

    The radiation protection and atomic energy laws of the Nordic countries Denmark, Finland, Iceland, Norway and Sweden are presented in this report in their status of March 1, 1984. As a background to this legislation the Nordic co-operation is briefly reviewed and the common basis for the legal texts is given. Some historical remarks for the legislation of each country are included. (orig./HP)

  8. Analytical quality control services of the International Atomic Energy Agency

    International Nuclear Information System (INIS)

    Suschny, O.

    1986-01-01

    The International Atomic Energy Agency provides quality control services to analytical laboratories. These services which include the provision of reference materials and the organisation of intercomparisons are rendered for the purpose of assisting laboratories in determining the accuracy of their analytical work. The following classes of materials are presently available: nuclear materials, environmental materials, animal and plant materials, materials for biomedical studies and materials of marine origin. (orig.) [de

  9. Safety Culture in Rosatom State Atomic Energy Corporation

    International Nuclear Information System (INIS)

    Adamchik, S. A.

    2016-01-01

    The paper presents Rosatom State Atomic Energy Corporation (hereinafter “Rosatom”) current activity in safety culture enhancement. After the Chernobyl accident individual commitment to safety, organizational factors influencing on safety were put under more significant attention. Safety culture (hereinafter “SC”) should be considered like a resource to provide safety in nuclear facilities. The resource potential is in minimisation of breaches by development and existing that patterns of human performance and organizational behavior which form attitude to safety as an overriding.

  10. Draft of a Fourth Act amending the Atomic Energy Act

    International Nuclear Information System (INIS)

    1976-01-01

    The bill comprises regulations concerning 1. the handling over and treatment of radioactive waste as well as its final storage under federal adminstration (article 87, section 3, sentence 1 Basic Law), 2. authorizations regarding the issuing of statuatory orders supplementing and extending sections 11 and 12 of the Atomic Energy Act, particulary in aim of the rationalization of licensing and the carrying-out of governmental supervision, 3. supplementing penal provisions. (LN) [de

  11. Supplementary plasma heating studies in the Atomic Energy Commission France

    International Nuclear Information System (INIS)

    Consoli, T.

    1976-01-01

    The research on supplementary heating of toroidal plasma made in France at the Atomic Energy Commission and in the European Community are described (with special reference to the J.E.T. project) in the frame of the national programs. A non exhaustive description of the world effort in this topic is also presented: (neutral injection heating, TTMP (transit time magnetic pumping) heating, electron and ion cyclotron resonance, and lower hybrid resonance heating)

  12. Atomic Energy Board, twenty first annual report, 1977

    International Nuclear Information System (INIS)

    1978-01-01

    Progress is reported on the following: nuclear materials, nuclear power, application of radioisotopes and radiation, health and safety, and fundamental studies undertaken in the fields of physics, chemistry, metallurgy, medicine and geology during 1977. The supporting activities of the computer services, engineering sevices, waste disposal plant, instrumentation section, research reactor and analytical services are given for 1977. The report contains a bibliography of publications published by staff members and bursars of the Atomic Energy Board during 1977

  13. High energy halogen atom reactions activated by nuclear transformations

    International Nuclear Information System (INIS)

    Rack, E.P.

    1990-05-01

    This program, which has been supported for twenty-four years by the Us Atomic Energy Commission and its successor agencies, has produced significant advances in the understanding of the mechanisms of chemical activation by nuclear processes; the stereochemistry of radioactivity for solution of specific problems. This program was contributed to the training of approximately seventy scientists at various levels. This final report includes a review of the areas of research and chronological tabulation of the publications

  14. The Atomic Energy of Canada Limited (AECL) employee health study

    International Nuclear Information System (INIS)

    Weeks, J.L.

    1985-01-01

    The Atomic Energy Health Study formally began in April 1980. The purpose of the study is to determine the causes of death among a population of radiation workers and to compare this information with data available for the causes of death in the general population. The study population and the implementation are briefly discussed. The aim of the study is to determine the real occupational risk of being a radiation worker. 3 refs

  15. Atomic Energy of Canada Limited 2007 annual financial report

    International Nuclear Information System (INIS)

    2007-01-01

    This is the annual report of Atomic Energy of Canada Limited for the year ending March 31, 2007 and summarizes the financial activities of AECL during the period 2006-2007. The highlights for this period include increase in consolidated commercial revenue by 40%, progress on the Cernavoda reactor, increased investment in the safety and performance of the CANDU fleet and a memorandum of understanding with Natural Resources Canada to govern implementation of a five-year waste management and decommissioning plan.

  16. Current radiation protection activities of the International Atomic Energy Agency

    International Nuclear Information System (INIS)

    Webb, G.A.M.

    1996-01-01

    The International Atomic Energy Agency (IAEA) program of the Radiation Safety Section is described in this paper. The Section has two main components: (1) the development of consensus safety documentation and (2) the use of that documentation as the basis for assisting countries to deal safely with their applications of radiation and radioactivity. Main activities of the section are listed for each of these components. Activities include documentation, coordinated research programs, and assistance to developing countries. 14 tabs

  17. The international law and the pacific uses of the atomic energy

    International Nuclear Information System (INIS)

    Mora, A.; Gutierrez, I.; Vargas, N.M.

    1992-01-01

    Contains information about: fundamental aspects of atomic energy; International Atomic Energy Agency; pacific uses of nuclear energy at national and international level; regulation for some risky activities in the pacific uses of radioactive materials; United Nations system for the secure use of atomic energy with pacific purposes; nuclear accidents; responsibility as fundamental element of nuclear law. 207 refs

  18. Comparative study of low-energy neutral atom imaging techniques

    International Nuclear Information System (INIS)

    Funsten, H.O.; McComas, D.J.; Scime, E.E.

    1994-01-01

    Low-energy neutral atom (LENA) imaging promise to be a revolutionary tool for global imaging of space plasmas. The technical challenges of LENA detection include separating them from the intense ambient UV without losing information about their incident trajectories, quantifying their trajectories, and obtaining high-sensitivity measurements. Two techniques that have been proposed for this purpose are based on fundamentally different atomic interaction mechanisms between LENAs and a solid; LENA transmission through an ultra thin foil and LENA reflection from a solid surface. Both of these methods provide LENA ionization (for subsequent removal from the UV by electrostatic deflection) and secondary electron emission (for time-of-flight start pulse generation and/or coincidence). They present a comparative study of the transmission and reflection techniques based on differences in atomic interactions with solids and surfaces. Transmission methods are shown to be superior for secondary electron emission rather than reflection methods. Furthermore, transmission methods are shown to be a sufficient for LENA imaging at LENA energies of approximately 1 keV to greater than 30 keV. A hybrid instrument using reflection from a low work function surface for LENA ionization and transmission for secondary electron emission is optimal for imaging of LENAs with energies less than approximately 1 keV

  19. World situation of atomic energy and nuclear fuel cycle

    International Nuclear Information System (INIS)

    Szili, G.

    1978-01-01

    At the International Conference organized by the IAEA in May 1976, several sections dealt with problems of the production of atomic energy and of the nuclear fuel cycle. However, the whole spectrum of these problems was discussed including problems of economic policy, politics and ethical problems, too. Reports were presented on trends of the development of atomic energy in developed and developing countries. Besides the systems of nuclear power plants and the trends of their development, the Conference attached prominent importance to the supply of nuclear fuels and to the fuel cycle, respectively. Owing to important factors, the reprocessing of the spent nuclear fuel was emphasized. The problem area of the treatment of radioactive wastes, the protection of workers in immediate contact and of environment against radiations, the possibilities of ensuring nuclear safety, the degrees of hazards and the methods of protection of fast breeder reactors and up-to-date equipments were discussed. In contrast to earlier conferences the complex problem of the correlation of atomic energy to public opinion played an important role, too. (P.J.)

  20. Plasma screening effects on the energies of hydrogen atom

    International Nuclear Information System (INIS)

    Soylu, A.

    2012-01-01

    A more general exponential cosine screened Coulomb potential is used for the first time to investigate the screening effects on the hydrogen atom in plasmas. This potential is examined for four different cases that correspond to four different type potentials when the different parameters are used in the potential within the framework of the well-known asymptotic iteration method. By solving the corresponding the radial Schrödinger equation with the screened and exponential cosine screened Coulomb potentials and comparing the obtained energy eigenvalues with the results of other studies, the applicability of the method to this kind of plasma physics problem is shown. The energy values of more general exponential cosine screened Coulomb potential are presented for various parameters in the potential. One of the advantages of the present potential is that it exhibits stronger screening effect than that of the exponential cosine screened Coulomb potential and it is also reduced to screened Coulomb and exponential cosine screened Coulomb as well as Coulomb potentials for special values of parameters. The parameters in the potential would be useful to model screening effects which cause an increase or decrease in the energy values of hydrogen atom in both Debye and quantum plasmas and in this manner this potential would be useful for the investigations of the atomic structure and collisions in plasmas.

  1. Binding activity of patterned concanavalin A studied by atomic force microscopy

    International Nuclear Information System (INIS)

    Lebed, Kateryna; Pyka-Fosciak, Grazyna; Raczkowska, Joanna; Lekka, Malgorzata; Styczen, Jan

    2005-01-01

    The mode of protein immobilization plays a crucial role in the preparation of protein microarrays used for a wide spectrum of applications in analytical biochemistry. The microcontact printing technique was used to form a protein pattern using concanavalin A (Con A) since Con A belongs to a group of proteins widely used in analytical assays due to their selectivity as regards different kinds of carbohydrates. Atomic force microscopy was used to image surface topography, delivering information about the quality of the protein pattern. The force spectroscopy mode was used to verify the functional activity of deposited proteins via determination of the forces of interaction between Con A and carboxypeptidase Y bearing carbohydrate structure recognized by Con A. The calculated binding force between Con A and CaY was 105 ± 2 pN and it was compared with that measured for Con A deposited directly from the protein solution. The similarity of the value obtained for the interaction force was independent of the mode of protein deposition, thereby verifying that the microcontact printing technique did not influence the carbohydrate binding activity of Con A. The correlation between the surface topography of patterned samples and adhesion maps obtained showed the possible use of AFM for studying the chemical properties of different regions of the micropatterns produced

  2. Calculation of positron binding energies using the generalized any particle propagator theory

    International Nuclear Information System (INIS)

    Romero, Jonathan; Charry, Jorge A.; Flores-Moreno, Roberto; Varella, Márcio T. do N.; Reyes, Andrés

    2014-01-01

    We recently extended the electron propagator theory to any type of quantum species based in the framework of the Any-Particle Molecular Orbital (APMO) approach [J. Romero, E. Posada, R. Flores-Moreno, and A. Reyes, J. Chem. Phys. 137, 074105 (2012)]. The generalized any particle molecular orbital propagator theory (APMO/PT) was implemented in its quasiparticle second order version in the LOWDIN code and was applied to calculate nuclear quantum effects in electron binding energies and proton binding energies in molecular systems [M. Díaz-Tinoco, J. Romero, J. V. Ortiz, A. Reyes, and R. Flores-Moreno, J. Chem. Phys. 138, 194108 (2013)]. In this work, we present the derivation of third order quasiparticle APMO/PT methods and we apply them to calculate positron binding energies (PBEs) of atoms and molecules. We calculated the PBEs of anions and some diatomic molecules using the second order, third order, and renormalized third order quasiparticle APMO/PT approaches and compared our results with those previously calculated employing configuration interaction (CI), explicitly correlated and quantum Montecarlo methodologies. We found that renormalized APMO/PT methods can achieve accuracies of ∼0.35 eV for anionic systems, compared to Full-CI results, and provide a quantitative description of positron binding to anionic and highly polar species. Third order APMO/PT approaches display considerable potential to study positron binding to large molecules because of the fifth power scaling with respect to the number of basis sets. In this regard, we present additional PBE calculations of some small polar organic molecules, amino acids and DNA nucleobases. We complement our numerical assessment with formal and numerical analyses of the treatment of electron-positron correlation within the quasiparticle propagator approach

  3. The origins of the International Atomic Energy Agency

    Energy Technology Data Exchange (ETDEWEB)

    Goldschmidt, B [Commissariat a l' Energie Atomique, International Relations (France)

    1977-08-15

    On 23 October 1956 in New York, 81 member countries of the United Nations Organization or of its specialized agencies adopted the Statute of the International Atomic Energy Agency, which was to go into formal operation before the end of 1957. A major step towards world-wide control of nuclear energy thus came to be taken more than ten years after the idea of establishing such control had been launched - the first tentative efforts, from 1946 to 1948, having ended in failure. The account follows in an attempt to retrace this 'prehistory' of the IAEA.

  4. The origins of the International Atomic Energy Agency

    International Nuclear Information System (INIS)

    Goldschmidt, B.

    1977-01-01

    On 23 October 1956 in New York, 81 member countries of the United Nations Organization or of its specialized agencies adopted the Statute of the International Atomic Energy Agency, which was to go into formal operation before the end of 1957. A major step towards world-wide control of nuclear energy thus came to be taken more than ten years after the idea of establishing such control had been launched - the first tentative efforts, from 1946 to 1948, having ended in failure. The account follows in an attempt to retrace this 'prehistory' of the IAEA

  5. Epp names new interim execs to head Atomic Energy Canada

    International Nuclear Information System (INIS)

    1992-01-01

    Federal Energy Minister Jake Epp has named Mrs. Marnie Paiken as acting chairman and Bruce Howe as acting president of AECL (formerly Atomic Energy Canada Ltd.), the federal Crown corporation charged with the development and utilization of nuclear energy. Both appointments were made necessary by the resignations of Robert Ferchat as chairman and Stanley Hatcher as president, each citing deep differences in their respective approaches to the management of the corporation. Mrs. Paiken has been a member of AECL's board since 1985, and previously served as acting chairman from March 1989 to July 1990. Howe has been deputy minister of the federal energy department since 1988, a position he will retain while carrying out his duties as president of AECL. A search has begun to find permanent replacements

  6. Photoelectron binding energy shifts observed during oxidation of group IIA, IIIA and IVA elemental surfaces

    International Nuclear Information System (INIS)

    Heide, P.A.W. van der

    2006-01-01

    An extensive re-evaluation of XPS binding energies (BE's) and binding energy shifts (ΔBE's) from metals, oxides and the carbonates of the group II, III and IVA elements (exceptions are Be, Mg and Hf) has been carried out using a substrate specific BE referencing approach. From this, O-1s BE's are found to fall into surface oxide, bulk oxide and carbonate groupings, with bulk oxides showing the lowest BE's followed by surface oxides (+∼1.5 eV) and then carbonates (+∼3.0 eV). The O-1s BE's from the bulk oxides also appear to scale with 1/d, where d is inter-atomic distance. The same is noted in the ΔBE's observed from the metallic counterparts during oxidation of the elemental surfaces. This, and the decreasing BE exhibited by Ca, Sr and Ba on oxidation is explained within the charge potential model as resulting from competing inter- and intra-atomic effects, and is shown to be consistent with partial covalency arguments utilizing Madulung potentials. The ΔBE's also fall into groups according to the elements location in the periodic table, i.e. s, p or d block. These trends open up the possibility of approximating ΔBE's arising from initial and final state effects, and bond distances

  7. A = 4 0+ - 1+ binding-energy difference

    International Nuclear Information System (INIS)

    Gibson, B.F.; Lehman, D.R.

    1982-01-01

    The A = 4 Λ-hypernuclei provide a rich source of information about the s-wave properties of the fundamental hyperon-nucleon (YN) force as well as offer a unique opportunity to investigate the complications that arise in calculations of the properties of bound systems in which one baryon (here the Λ) with a given isospin couples strongly to another (the Σ) with a different isospin. The Λ 4 H - Λ 4 He isodoublet ground-state energies are not consistent with a charge symmetry hypothesis for the YN interaction. The (spin-flip) excitation energies are quite sensitive to the ΛN - ΣN coupling of the YN interaction. In particular, when one represents the free YN interaction in terms of one-channel effective ΛN potentials, the resulting 0 + (ground) state and 1 + (excited) spin-flip state are inversely ordered in terms of binding energies, the 1 + state being more bound. It is the Σ suppression that results from the reduced strength of the ΛN - ΣN off-diagonal coupling potential when the trinucleon core is restricted to isospin-1/2 which we study here. We find this spin-isospin suppression of the Λ-Σ conversion, which is due to the composite nature of the nuclear cores of the Λ 4 H and Λ 4 He hypernuclei, to be a significant factor in understanding the 0 + - 1 + binding energy relationship

  8. Sampling and energy evaluation challenges in ligand binding protein design.

    Science.gov (United States)

    Dou, Jiayi; Doyle, Lindsey; Jr Greisen, Per; Schena, Alberto; Park, Hahnbeom; Johnsson, Kai; Stoddard, Barry L; Baker, David

    2017-12-01

    The steroid hormone 17α-hydroxylprogesterone (17-OHP) is a biomarker for congenital adrenal hyperplasia and hence there is considerable interest in development of sensors for this compound. We used computational protein design to generate protein models with binding sites for 17-OHP containing an extended, nonpolar, shape-complementary binding pocket for the four-ring core of the compound, and hydrogen bonding residues at the base of the pocket to interact with carbonyl and hydroxyl groups at the more polar end of the ligand. Eight of 16 designed proteins experimentally tested bind 17-OHP with micromolar affinity. A co-crystal structure of one of the designs revealed that 17-OHP is rotated 180° around a pseudo-two-fold axis in the compound and displays multiple binding modes within the pocket, while still interacting with all of the designed residues in the engineered site. Subsequent rounds of mutagenesis and binding selection improved the ligand affinity to nanomolar range, while appearing to constrain the ligand to a single bound conformation that maintains the same "flipped" orientation relative to the original design. We trace the discrepancy in the design calculations to two sources: first, a failure to model subtle backbone changes which alter the distribution of sidechain rotameric states and second, an underestimation of the energetic cost of desolvating the carbonyl and hydroxyl groups of the ligand. The difference between design model and crystal structure thus arises from both sampling limitations and energy function inaccuracies that are exacerbated by the near two-fold symmetry of the molecule. © 2017 The Authors Protein Science published by Wiley Periodicals, Inc. on behalf of The Protein Society.

  9. Low-energy neutral atom emission from the Earth's magnetosphere

    International Nuclear Information System (INIS)

    Moore, K.R.; Scime, E.E.; Funsten, H.O.; McComas, D.J.; Thomsen, M.F.

    1994-01-01

    Imaging of the terrestrial magnetosphere is possible through the detection of low-energy neutral atoms (LENAs) produced by charge exchange between magnetospheric plasma ions and neutral atoms of the Earth's geocorona. The authors present calculations of both hydrogen and oxygen line-of-sight LENA fluxes expected on orbit for various plasma regimes as predicted by the Rice University Magnetospheric Specification Model. To decrease the required computation time, they are in the process of adapting their code for massively parallel computers. The speed gains achieved from parallel algorithms are substantial, and they present results from computational runs on the Connection Machine CM-2 data parallel supercomputer. They also estimate expected image count rates and image quality based on realistic instrument geometric factors, energy passbands, neutral atom scattering in the instrument, and image accumulation intervals. The results indicate that LENA imaging instruments will need a geometric factor (G) on the order of 0.1 cm 2 sr eV/eV to be capable of imaging storm time ring currents, and a G of 1.0 cm 2 sr eV/eV in order to image the quiet time ring current fluxes, ion injections from the tail, and subsequent ion drifts toward the dayside magnetopause

  10. Conference report 11th German atomic energy law symposium

    International Nuclear Information System (INIS)

    Anon.

    2001-01-01

    The 11 th German Atomic Energy Law Symposium organized by the Federal Ministry for the Environment, Nature Conservation, and Nuclear Safety (BMU) was held in Berlin on October 9 and 10, 2001. Approximately 250 participants from industry, politics, administration, science, and associations had accepted the invitation by BMU and discussed a variety of questions arising mainly out of the new nuclear energy policy of the federal government. In the introductory session, Federal Minister for the Environment Juergen Trittin sketched the framework of federal policy resulting from the criteria set forth by the federal government and the negotiations with the power utilities after the agreement on the future use of nuclear power had been signed. The following seven technical sessions dealt with basic constitutional matters as well as problems of public law and economic law stemming from the nuclear power policy of the federal government. Major points included the amendment to the Atomic Energy Act, interim storage, the redefined objectives of final storage, and problems relating to yardsticks by which to gauge safety, and problems of ensuring safety. Among other subjects, also the relationship between the federal government and the federal states in nuclear regulatory matters as well aspects of power economy and energy policy were debated. (orig.) [de

  11. Energy loading effects in the scaling of atomic xenon lasers

    International Nuclear Information System (INIS)

    Ohwa, M.; Kushner, M.J.

    1990-01-01

    The intrinsic power efficiency of the atomic xenon (5d → 6p) infrared (1.73--3.65 μm) laser is sensitive to the rate of pumping due to electron collision mixing of the laser levels. Long duration pumping at moderate power deposition may therefore result in higher energy efficiencies than pumping at higher powers. In this paper the authors examine the consequences of high energy deposition (100's J/1 atm) during long pumping pulses (100's μs) on the intrinsic power and energy efficiency and optimum power deposition of the atomic xenon laser. The dominant effect of high energy loading, gas heating, causes an increase in the electron density and therefore an increase in the electron collision mixing of the laser levels. The optimum power deposition for a given gas density therefore shifts to lower values with increasing gas temperature. For sufficiently long pumping pulses, nonuniform gas heating results in convection and rarification of highly pumped regions. The optimum power deposition therefore shifts to even lower values as the length of the pumping pulse increases. As a result, laser efficiency depends on the spatial distribution of power deposition as well as its magnitude

  12. Precautionary measures to prevent damage, as defined in the Atomic Energy Law

    International Nuclear Information System (INIS)

    Marburger, P.

    1983-01-01

    The requirement to take every 'precaution which is necessary in the light of existing scientific knowledge and technology to prevent damage' (section 7, sub-section (2), no. 3 Atomic Energy Act) is not restricted to conventional (preventive) measures but is to be understood as a duty to actively provide for appropriate protection from conceivable damage. Below the level of legally binding laws and regulations, there is the level of scientific-technical codes and standards, which are of great significance to the licensing procedure under atomic energy law. As these codes and standards do not form part of the law but nevertheless represent the essence of scientific knowledge needed to fulfill the duty defined by the law, they are gaining full impact only through the licensing procedure, thus being transformed into concrete legal requirements. Hence one can say that the legal situation in atomic energy law relating to the licensing requirements as laid down in section 7, sub-section (2), no. 3 is presently characterised by a regulatory deficit. This regulatory deficit cannot be overcome by the means and tools offered by the current law. One possibility to fill the gap is to give a legally binding status to the safety guides defined by the deterministic safety concept, by listing the conceivable accidents to be mastered. This recommendable procedure could lead to an ordinance on the safety of nuclear installations. Such an ordinance could be kept abreast with technical progress and scientific knowledge by creating a referring legal instrument, pointing to, e.g., the KTA Safety Guide. (orig./HSCH) [de

  13. How to deal with multiple binding poses in alchemical relative protein-ligand binding free energy calculations.

    Science.gov (United States)

    Kaus, Joseph W; Harder, Edward; Lin, Teng; Abel, Robert; McCammon, J Andrew; Wang, Lingle

    2015-06-09

    Recent advances in improved force fields and sampling methods have made it possible for the accurate calculation of protein–ligand binding free energies. Alchemical free energy perturbation (FEP) using an explicit solvent model is one of the most rigorous methods to calculate relative binding free energies. However, for cases where there are high energy barriers separating the relevant conformations that are important for ligand binding, the calculated free energy may depend on the initial conformation used in the simulation due to the lack of complete sampling of all the important regions in phase space. This is particularly true for ligands with multiple possible binding modes separated by high energy barriers, making it difficult to sample all relevant binding modes even with modern enhanced sampling methods. In this paper, we apply a previously developed method that provides a corrected binding free energy for ligands with multiple binding modes by combining the free energy results from multiple alchemical FEP calculations starting from all enumerated poses, and the results are compared with Glide docking and MM-GBSA calculations. From these calculations, the dominant ligand binding mode can also be predicted. We apply this method to a series of ligands that bind to c-Jun N-terminal kinase-1 (JNK1) and obtain improved free energy results. The dominant ligand binding modes predicted by this method agree with the available crystallography, while both Glide docking and MM-GBSA calculations incorrectly predict the binding modes for some ligands. The method also helps separate the force field error from the ligand sampling error, such that deviations in the predicted binding free energy from the experimental values likely indicate possible inaccuracies in the force field. An error in the force field for a subset of the ligands studied was identified using this method, and improved free energy results were obtained by correcting the partial charges assigned to the

  14. How To Deal with Multiple Binding Poses in Alchemical Relative Protein–Ligand Binding Free Energy Calculations

    Science.gov (United States)

    2016-01-01

    Recent advances in improved force fields and sampling methods have made it possible for the accurate calculation of protein–ligand binding free energies. Alchemical free energy perturbation (FEP) using an explicit solvent model is one of the most rigorous methods to calculate relative binding free energies. However, for cases where there are high energy barriers separating the relevant conformations that are important for ligand binding, the calculated free energy may depend on the initial conformation used in the simulation due to the lack of complete sampling of all the important regions in phase space. This is particularly true for ligands with multiple possible binding modes separated by high energy barriers, making it difficult to sample all relevant binding modes even with modern enhanced sampling methods. In this paper, we apply a previously developed method that provides a corrected binding free energy for ligands with multiple binding modes by combining the free energy results from multiple alchemical FEP calculations starting from all enumerated poses, and the results are compared with Glide docking and MM-GBSA calculations. From these calculations, the dominant ligand binding mode can also be predicted. We apply this method to a series of ligands that bind to c-Jun N-terminal kinase-1 (JNK1) and obtain improved free energy results. The dominant ligand binding modes predicted by this method agree with the available crystallography, while both Glide docking and MM-GBSA calculations incorrectly predict the binding modes for some ligands. The method also helps separate the force field error from the ligand sampling error, such that deviations in the predicted binding free energy from the experimental values likely indicate possible inaccuracies in the force field. An error in the force field for a subset of the ligands studied was identified using this method, and improved free energy results were obtained by correcting the partial charges assigned to the

  15. A New Instrument Design for Imaging Low Energy Neutral Atoms

    Science.gov (United States)

    Keller, John W.; Collier, Michael R.; Chornay, Dennis; Rozmarynowski, Paul; Getty, Stephanie; Cooper, John F.; Smith, Billy

    2007-01-01

    The MidSTAR-2 satellite, to be built at the US Naval Academy as a follow-on to the successful MidSTAR-1 satellite (http://web.ew.usna.edu/midstar/), will launch in 2011 and carry three Goddard Space Flight Center (GSFC) experiments developed under Goddard's Internal Research and Development (IRAD) program. One of these GSFC instruments, the Miniature Imager for Neutral Ionospheric atoms and Magnetospheric Electrons (MINI-ME) builds on the heritage of the Goddard-developed Low-Energy Neutral Atom (LENA) imager launched on the IMAGE spacecraft in 2000. MINI-ME features a Venetian-blind conversion surface assembly that improves both light rejection and conversion efficiency in a smaller and lighter package than LENA making this an highly effective instrument for viewing solar wind charge exchange with terrestrial and planetary exospheres. We will describe the MINI-ME prototyping effort and its science targets.

  16. Theoretical treatment of electron capture and excitation in two-electron system ion-atom, atom-atom collisions at low to intermediate energy

    International Nuclear Information System (INIS)

    Kimura, M.

    1986-01-01

    A review of various theoretical treatments which have been used to study electron-capture and excitation processes in two-electron-system ion-atom, atom-atom collisions at low to intermediate energy is presented. Advantages as well as limitations associated with these theoretical models in application to practical many-electron ion-atom, atom-atom collisions are specifically pointed out. Although a rigorous theoretical study of many-electron systems has just begun so that reports of theoretical calculations are scarce to date in comparison to flourishing experimental activities, some theoretical results are of great interest and provide important information for understanding collision dynamics of the system which contains many electrons. Selected examples are given for electron capture in a multiply charged ion-He collision, ion-pair formation in an atom-atom collision and alignment and orientation in a Li + + He collision. (Auth.)

  17. Absence of a Scott correction for the total binding energy of noninteracting fermions in a smooth potential well

    International Nuclear Information System (INIS)

    Huxtable, B.D.

    1988-01-01

    It is shown, for V in a particular class of smooth functions, that the total binding energy, E(Z), of Z noninteracting Fermions in the potential well Z 4/3 V(Z 1/3 X) obeys E(Z) = c TF (V)Z 7/3 + O(Z 5/3 ) as Z → ∞. Here c TF (V) is the coefficient predicted by Thomas-Fermi theory. This result is consistent with the conjectured Scott correction, which occurs at order Z 2 , to the total binding energy of an atomic number Z. This correction is thought to arise only because V(x)∼ - |x| -1 near x = 0 in the atomic problem, and so V is not a smooth function

  18. Binding energy and single–particle Energies in the 16 0 region ...

    African Journals Online (AJOL)

    ... single-particle energies in the oxygen region by folding together a Hamiltonian in the rest-frame of the nucleus with two-body correlation functions based on the Njimegen potential. We have found that the binding energies are very sensitive to the core radius rc and that the effects of tensor correlations are non-negligible.

  19. Measurement of Exciton Binding Energy of Monolayer WS2

    Science.gov (United States)

    Chen, Xi; Zhu, Bairen; Cui, Xiaodong

    Excitonic effects are prominent in monolayer crystal of transition metal dichalcogenides (TMDCs) because of spatial confinement and reduced Coulomb screening. Here we use linear differential transmission spectroscopy and two-photon photoluminescence excitation spectroscopy (TP-PLE) to measure the exciton binding energy of monolayer WS2. Peaks for excitonic absorptions of the direct gap located at K valley of the Brillouin zone and transitions from multiple points near Γ point of the Brillouin zone, as well as trion side band are shown in the linear absorption spectra of WS2. But there is no gap between distinct excitons and the continuum of the interband transitions. Strong electron-phonon scattering, overlap of excitons around Γ point and the transfer of the oscillator strength from interband continuum to exciton states make it difficult to resolve the electronic interband transition edge even down to 10K. The gap between excited states of the band-edge exciton and the single-particle band is probed by TP-PLE measurements. And the energy difference between 1s exciton and the single-particle gap gives the exciton binding energy of monolayer WS2 to be about 0.71eV. The work is supported by Area of excellency (AoE/P-04/08), CRF of Hong Kong Research Grant Council (HKU9/CRF/13G) and SRT on New Materials of The University of Hong Kong.

  20. Charge compensation and binding energy referencing in XPS analysis

    International Nuclear Information System (INIS)

    Metson, J.B.

    1999-01-01

    Full text: The past decade has seen a number of significant advances in the capabilities of commercial X-ray Photoelectron spectrometers. Of note have been the near universal adoption of monochromatised X-ray sources, very useful advances in spatial resolution, particularly in spectroscopy, and radical developments in sample handling and automation. However one of the most significant advances has been the development of several relatively new concepts in charge compensation. Throughout the evolution of XPS, the ability to compensate for surface charging and accurately determine binding energies, particularly with electrically inhomogenous samples, has remained one of the most intractable problems. Beginning perhaps with the Kratos, 'in the lens' electrostatic mirror/electron source coupled with a magnetic snorkel lens, a number of concepts have been advanced which take a quite different conceptual approach to charge compensation. They differ in a number of quite fundamental ways to the electron flood type compensators widely used and absolutely essential with instruments based on monochromatised sources. The concept of the local return of secondary electrons to their point of emission, largely negates the problems associated with differential charging across different regions of the surface, and suggests the possibility of overcoming one of the central limitations of XPS, that is the inability to compare absolute binding energies of species in different electrical as well as chemical environments. The general status of charge compensation and the use of internal binding energy references in XPS will be reviewed, along with some practical examples of where these techniques work, and where there is clearly still room for further development. Copyright (1999) Australian X-ray Analytical Association Inc

  1. Elastic scattering of low-energy electrons with Sr atoms

    International Nuclear Information System (INIS)

    Yuan, J.; Zhang, Z.; Wan, H.

    1990-01-01

    Static-exchange, plus correlation-polarization-potential calculations are performed for elastic low-energy electron scattering from Sr atoms while paying attention to the low-lying shape resonances. The correlation potential is calculated both with and without a scaling factor. A 2 D-shape resonance is produced at 1.0 eV with a parameter-free, and at 1.25 eV with a scaled, correlation potential. No 2 P-shape resonances are predicted, but evidence to support the existence of a stable negative ion Sr - in the 5s 2 5p electron configuration is given from the viewpoint of electron scattering. The bound energy of the extra electron in the negative ion is estimated by transforming the phase shift of the corresponding partial wave into the polarization quantum-defect number and extrapolating the number from positive to negative energies

  2. Atomic Oxygen Energy in Low Frequency Hyperthermal Plasma Ashers

    Science.gov (United States)

    Banks, Bruce A.; Miller, Sharon K R.; Kneubel, Christian A.

    2014-01-01

    Experimental and analytical analysis of the atomic oxygen erosion of pyrolytic graphite as well as Monte Carlo computational modeling of the erosion of Kapton H (DuPont, Wilmington, DE) polyimide was performed to determine the hyperthermal energy of low frequency (30 to 35 kHz) plasma ashers operating on air. It was concluded that hyperthermal energies in the range of 0.3 to 0.9 eV are produced in the low frequency air plasmas which results in texturing similar to that in low Earth orbit (LEO). Monte Carlo computational modeling also indicated that such low energy directed ions are fully capable of producing the experimentally observed textured surfaces in low frequency plasmas.

  3. Fifth Semiannual Report of the Commission to the Congress: Atomic Energy Development, 1947- 1948

    Energy Technology Data Exchange (ETDEWEB)

    Lilienthal, David E.; Bacher, Robert F.; Pike, Sumner T.; Strauss, Lewis L.

    1949-01-01

    The document represents the fifth semiannual report to Congress, covering specifically the various developments in atomic energy since the inception of the Atomic Energy Commission in 1946. This fifth report represents an expansion of effort in all phases of atomic energy development and is prepared against a background of world affairs.

  4. Nuclear energy policy and atomic energy law. Issues and developmental aspects

    International Nuclear Information System (INIS)

    Schmidt-Preuss, M.

    1998-01-01

    Nuclear energy policy and the atomic energy law recurrently have been a focal point of interest and an issue of political debate in Germany. However, this time the political debate is gaining a new dimension in the wake of the general elections held in September 1998 and the resulting change of government. The contribution compares aspects of the history of atomic energy research and nuclear technology with the current political situation and assesses the impacts of announced changes in government policy and legislation. (orig./CB) [de

  5. Australian Atomic Energy Commission: A new energy research establishment at Lucas Heights

    Energy Technology Data Exchange (ETDEWEB)

    Moyal, A [Sydney Univ. (Australia). Dept. of Government and Public Administration

    1980-02-01

    A review of the role of the Atomic Energy Commission has recommended that the Lucas Heights establishment should engage in research on energy sources in general, rather than nuclear only as at present, and that certain of its present functions (regulatory and manufacturing) should be handled by other organisations.

  6. Innovation projects of atomic energy institute of national nuclear center RK in the area of peaceful use of atomic energy

    International Nuclear Information System (INIS)

    Kenzhin, E.; Tazhibayeva, I.; Vasiliyev, Y.; Kolodeshnikov, A.; Vurim, A.

    2010-01-01

    Institute of Atomic Energy of National Nuclear Center RK (IAE NNC RK) is located in Kurchatov. The city is situated at the border of former Semipalatinsk test site. The institute includes two reactor complexes - IGR and Baikal-1, which are rather distant from Kurchatov. Main activities of IAE NNC RK are: 1. Experimental researches of the nuclear power reactors safety; 2. Experimental researches of behavior of the structural materials for fusion and fission facilities under reactor irradiation; 3. Management of radioactive wastes; 4. Participation in the projects on decommissioning of the fast neutron reactor BN-350; 5. innovation projects: creation of first Kazakhstan's fusion reactor - tokamak KTM for materials; research and testing; development of new technologies (irradiated Be-recycling); development of new reactor technologies - project on creation of high temperature gas-cooled reactor KHTR. IAE NNC RK jointly with Japanese Atomic Energy Agency and with participation of Japanese Atomic Power Company is performing the activities on experimental substantiation of design of active core of prospective fast neutron reactor. Main goal of out-of-pile experiments at the EAGLE facility is obtaining of the information on fuel movement processes under conditions simulating the accident with melting of fast reactor core containing tube-design fuel assembly. Batch mixture is loaded into graphite crucible; then it is melded into electric melting furnace and poured into melt top trap. The outlet pipe is melted by the melt, which is poured into bottom melt trap through the pipe with sodium

  7. Terrestrial magnetospheric imaging: Numerical modeling of low energy neutral atoms

    International Nuclear Information System (INIS)

    Moore, K.R.; Funsten, H.O.; McComas, D.J.; Scime, E.E.; Thomsen, M.F.

    1993-01-01

    Imaging of the terrestrial magnetosphere can be performed by detection of low energy neutral atoms (LENAs) that are produced by charge exchange between magnetospheric plasma ions and cold neutral atoms of the Earth's geocorona. As a result of recent instrumentation advances it is now feasible to make energy-resolved measurements of LENAs from less than I key to greater than 30 key. To model expected LENA fluxes at a spacecraft, we initially used a simplistic, spherically symmetric magnetospheric plasma model. 6 We now present improved calculations of both hydrogen and oxygen line-of-sight LENA fluxes expected on orbit for various plasma regimes as predicted by the Rice University Magnetospheric Specification Model. We also estimate expected image count rates based on realistic instrument geometric factors, energy passbands, and image accumulation intervals. The results indicate that presently proposed LENA instruments are capable of imaging of storm time ring current and potentially even quiet time ring current fluxes, and that phenomena such as ion injections from the tail and subsequent drifts toward the dayside magnetopause may also be deduced

  8. International Atomic Energy Agency. Highlights of activities. September 1993

    International Nuclear Information System (INIS)

    Gillen, V.A.

    1993-09-01

    This document describes the most important activities of the International Atomic Energy Agency during the period September 1992 - September 1993, in particular in the following areas: (i) nuclear power; (ii) nuclear fuel cycle; (iii) radioactive waste management; (iv) comparative assessment of energy sources; (v) IAEA laboratory activities; (vi) nuclear applications in the food industry and in agriculture; (vii) human health applications of nuclear techniques, especially in the treatment and prevention of diseases and in the analysis of health problems related to the environment; (viii) industry and earth sciences; (ix) physical and chemical sciences; (x) radiation protection; (xi) safety of nuclear installations; (xii) safeguards and non-proliferation activities; (xiii) activities in the area of public and technical information such as the International Nuclear Information System (INIS) and other IAEA computerized databases and reference systems, the publication Nuclear Fusion, a monthly scientific journal of articles on thermonuclear fusion research and development, and the organization of meetings on atomic energy; and (xiv) a description of the Agency's technical assistance activities, including financial data

  9. Low energy atomic field bremsstrahlung from thin rare gas targets

    International Nuclear Information System (INIS)

    Semaan, M.E.

    1982-01-01

    A relative measurement of the doubly-differential cross-section for electron atomic field bremsstrahling, differential in photon energy and angle is reported. Data for (d 2 sigma)/(dk dO/sub k/) have been taken for incident electron energies T ranging from 4 to 10 keV on target atoms of helium, neon, argon, krypton and xenon at a photon emission angle of 90 0 . The X-rays, produced at 90 0 to the intersection of the crossed electron and gas beams, are detected by a Si(Li) detector, having a resolution of about 200 eV at 6 keV and 0.3 mil Be window. The theoretical angular distribution (d 2 sigma)/(dk dO/sub k/) has been deduced from the photon energy spectrum by the use of the shape function S(Z,T,k,T) defined by Tseng and Pratt as S(Z,T,k,T) = [(d 2 sigma)/(dk dO/sub k/)] / [(dsigma)/(dk)]. The values of S used were obtained by an interpolation of the benchmark data provided by Pratt et al. Agreement between our experiment and the theory is measured by how well the theoretical curve fits the data. The agreement appeared to be good

  10. Non-proliferation and the control of atomic energy

    International Nuclear Information System (INIS)

    Goldschmidt, B.

    1977-01-01

    The non-proliferation problem has never ceased to haunt and to influence those responsible for the development of atomic energy. During and after the Second World War, Anglo-American co-operation was reflected in restrictions on the exchange of enrichment and reprocessing know-how. Between 1945 and 1955, the Anglo-Saxon powers continued with the policy of secrecy and uranium monopoly decided on in 1943 at the Quebec summit conference. Starting in 1955, the failure of this policy led - at the suggestion of the United States of America - to a freer flow of information and to the creation of the International Atomic Energy Agency with its safeguards, which permitted widespread application of the policy of technical assistance subject to controls and widespread commerce in research and power reactors - mainly fuelled with enriched uranium and manufactured in the USA. There followed periods characterized by general legal blocks, with two unilateral renunciation treaties - the Partial Test Ban Treaty of 1963, covering non-underground tests, and the Treaty on the Non-Proliferation of Nuclear Weapons, of 1968, covering nuclear explosive devices and the entire fuel cycle. The Indian atomic explosion and the acceleration of nuclear programmes owing to the oil crisis prompted - in 1974 - efforts by supplier countries to limit the transfer of sensitive technology and the possession of plants capable of producing substances which could be used in the production of nuclear weapons; the USA has even proposed the curtailment of plutonium extraction and of breeder construction, although these are considered by many countries to be essential to the independence of their energy development programmes. This policy of reserving the sensitive stages of the fuel cycles to a few advanced countries and the questioning of existing nuclear agreements have created, in the relations between supplier and recipient countries, a regrettable intensification of the distrust which must be dispelled

  11. Recent developments at the atomic and molecular data unit of the International Atomic Energy Agency

    International Nuclear Information System (INIS)

    Clark, R.E.H.; )

    2002-01-01

    The Atomic and Molecular (A+M) Data Unit of the IAEA main purpose is to establish and maintain databases in support of nuclear fusion energy research. This encompasses a very large number of processes in atomic, molecular, and plasma - material interaction physics. Recent improvements and additions to these databases are presented. A prototype search engine, which searches five different sites for radiative data and two sites for electron impact excitation and ionization data is introduced. It is available at the IAEA, Weizmann Institute and GAPHYOR web sites. Data on erosion materials produced by the Co-ordinated research project (CRP) 'Plasma-interaction induced erosion of fusion reactor materials' was evaluated, fitted to physically realistic forms for angle and energy dependence and the resulting fits were added to the online electronic database. In a CRP on radiative power losses in plasmas, many lenghtly modelling calculations were carried out. In addition to providing the calculated radiated power, effective ionisation and recombination rate coefficients were derived. These data were stored along with the populations of the ion stages as well as the total radiation from each ion stage. Thus, it is possible to use these data to interpolate in temperature and electron density to obtain the radiated power at an arbitrary temperature and density. A preliminary version of a new interface to the bibliographic database at the A+M Data unit was developed, it allows the user to search by author and/or keyword. The resulting references are displayed along with a link to the home page of the journal where possible. A code for calculation electron impact excitation cross sections using the so-called 'average approximation' and a version of the Hartree-Fock atomic structure code were installed in the unit and can be run through an interface at the web page. (nevyjel)

  12. Safeguards and legal matters 1996. International Atomic Energy Agency publications

    International Nuclear Information System (INIS)

    1997-03-01

    This catalogue lists all currently valid sales publications of the International Atomic Energy Agency dealing with Safeguards and Legal Matters. Most publications are published in English. Proceedings of conferences, symposia and panels of experts may contain some papers in languages other than English (French, Russian or Spanish), but all of these papers have abstracts in English. It should be noted that prices of books are quoted in Austrian Schillings. The prices do not include local taxes and are subject to change without notice. All books in this catalogue are 16 x 24 cm, paper-bound, unless otherwise stated

  13. Proceedings of the fifteenth Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    Vidovszky, I.

    2005-11-01

    The present volume contains 59 papers, presented on the fifteenth Symposium of Atomic Energy Research, held in Znojmo, Czech Republic, 3-7 October 2005. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Spectral and Core Calculation Methods, Core Design, Operation and Fuel Management, Core Monitoring, Surveillance and Testing, Neutron Kinetics and Reactor Dynamics Methods, Criticality Safety, Spent Fuel, and CFD Codes Application - according to the presentation sequence on the Symposium

  14. International Atomic Energy Agency Safeguards: Challenge and response

    Science.gov (United States)

    Spector, Leonard S.

    2017-11-01

    This article provides a critical review of the nuclear accounting and inspection system of the International Atomic Energy Agency (IAEA), known as "IAEA safeguards." The article focuses on the multiple challenges the Agency confronts in verifying that all nuclear activities in the countries under its safeguards system are being pursued for exclusively peaceful purposes. The principal challenges noted are those posed by: undeclared facilities, the development of enrichment and reprocessing capabilities, illicit procurement activities, denial of inspector access, difficulties in verifying absence of weaponization activities, and difficulties in establishing that all nuclear-relevant activities in a state are peaceful. The article is in the form of annotated PowerPoint briefing slides.

  15. White paper on atomic energy, for 1974 and 1975. [Japan

    Energy Technology Data Exchange (ETDEWEB)

    1975-09-01

    Nearly 20 years have passed since the initiation of peaceful uses of atomic energy in Japan. Close to the end of this period, there occurred the so-called oil crisis, which emphasized the need for nuclear power development. Meanwhile, voices of the people in Japan are varied concerning nuclear power, as in siting of the power plants and the n.s. (nuclear ship) Mutsu. The paper describes the following: safety, environmental protection, nuclear power generation, nuclear fuel cycle, fission reactor and fusion reactor development, nuclear-powered ships, and radiation utilization.

  16. Annual activity report of Atomic Energy Organization of Iran

    International Nuclear Information System (INIS)

    1976-07-01

    The second year activities of Atomic Energy Organization of Iran (AEOI) was reported as follows: Activites of two R and D centres at Tehran, and one in Isfahan which is concentrated on technical and industrial problems of nuclear power plant; site selection from geographical, geological and environmental points of view; nuclear power construction in the vicinity of Bushehr; supply and quantity survey of nuclear fuel for the next 20 years and the activity program of AEOI on nuclear safety. This report also included nuclear information centre activities plus administrative organization and international relations activities

  17. Atomic Energy of Canada Limited annual report 2002-2003

    International Nuclear Information System (INIS)

    2003-01-01

    This is the annual report of Atomic Energy of Canada Limited for the year ending March 31, 2003 and summarizes the activities of AECL during the period 2002-2003. It outlines the strategic objectives that include growing the market and market share, maximize return on resources, evolve the business structure to support business growth, grow knowledge assets, be a technology and knowledge-based innovative leader, leverage intellectual property to provide marketable products and services and establish nuclear power as a clean air and public policy solution.

  18. Proceedings of the eighth Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    Vidovszky, I.

    1998-10-01

    These are the remaining 9 papers, presented on the eighth Symposium of Atomic Energy Research, held in Bystrice nad Perstejnem, Czech Republic, 21-25 September 1998. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Spectral and Core Calculation Methods, Core Design, Operation and Fuel Management, Core Monitoring, Surveillance and Testing, Neutron Kinetics and reactor Dynamics Methods, Safety Issues and Analysis, Rod Drop Reactivity Measurements, Criticality safety, Spent Fuel and Decommissioning, - according to the presentation sequence on the Symposium

  19. Proceedings of the thirteenth Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    Vidovszky, Istvan

    2003-11-01

    The present volume contains 58 papers, presented on the thirteenth Symposium of Atomic Energy Research, held in Dresden, Germany, 22-26 September 2003. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Core Monitoring, Surveillance and Testing, Safety Issues, Spectral and Core Calculation Methods, Core Operation and Fuel Management, Spent Fuel Transmutations and Decommissioning, Neutron Kinetics and reactor Dynamics Methods, Poster Session - according to the presentation sequence on the Symposium

  20. International Atomic Energy Agency Publications. Catalogue 1986-1999

    International Nuclear Information System (INIS)

    2000-07-01

    This catalogue lists all sales publications of the International Atomic Energy Agency issued from 1986 up to the end of 1999 and still available. Some earlier titles which form part of an established series or are still considered of importance have been included. Most Agency publications are issued in English, though some are also available in Chinese, French, Russian or Spanish. This is noted as C for Chinese, E for English, F for French, R for Russian and S for Spanish by the relevant ISBN number

  1. Proceedings of the twelfth Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    Vidovszky, Istvan

    2002-11-01

    The present volume contains 45 papers, presented on the twelfth Symposium of Atomic Energy Research, held in Sunny Beach, Bulgaria, 22-28 September 2002. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Core Monitoring, Surveillance and Testing, Safety Issues, Core Operation and Fuel Management, Spectral and Core Calculation Methods, Spent Fuel Transmutations and Decommissioning, Neutron Kinetics and reactor Dynamics Methods, Poster Session - according to the presentation sequence on the Symposium

  2. Earth sciences 1980-1994. International Atomic Energy Agency Publications

    International Nuclear Information System (INIS)

    1995-04-01

    This catalogue lists sales publications of the International Atomic Energy Agency dealing with Earth Sciences issued during the period 1969-1994. Most publications are published in English. Proceedings of conferences, symposia and panels of experts may contain some papers in languages other than English (French, Russian or Spanish), but all these papers have abstracts in English. It should be noted that prices of books are quoted in Austrian Schillings. The prices do not include local taxes and are subject to change without notice. All books in this catalogue are 16 x 24 cm, paper-bound, unless otherwise stated

  3. White paper on atomic energy, for 1974 and 1975

    International Nuclear Information System (INIS)

    1975-01-01

    Nearly 20 years have passes since the initiation of peaceful uses of atomic energy in Japan. Close to the end of this period, there had occurred the so-called oil crisis, which emphasizes the keen need for nuclear power development. In the meanwhile, voices of the people in Japan are varied concerning the nuclear power, as in siting of the power plants and the n.s. (nuclear ship) Mutsu. The white paper describes the following: safety, environment preservation, nuclear power generation, nuclear fuel cycle, power reactor development and fusion reactor, nuclear-powered ship, radiation utilization, etc. (Mori, K.)

  4. Atomic Energy of Canada Limited 2008 annual financial report

    International Nuclear Information System (INIS)

    2008-01-01

    This is the annual report of Atomic Energy of Canada Limited for the year ending March 31, 2008 and summarizes the financial activities of AECL during the period 2007-2008. The major highlights for this period include increase of consolidated revenue by 4%, significant progress on Liquid Waste Transfer and Storage (LWTS) and the Fuel Packaging and Storage (FPS) project, feasibility study of a new ACR-1000 plant in New Brunswick and a memorandum of understanding with CNSC for pre project design review of ACR-1000.

  5. Status of AMS at the China Institute of Atomic Energy

    International Nuclear Information System (INIS)

    Jiang Shan; He Ming; Hu Yueming; Yuan Jian

    2007-01-01

    The first accelerator mass spectrometry (AMS) system in China was set up at the China Institute of Atomic Energy in 1989. In the following years, long-lived nuclides 10 Be, 26 Al, 36 Cl, 41 Ca, 79 Se and 129 I were measured in geology, environment and biology samples. The newly development of the AMS measurement and applications in recent years were introduced. The current projects include upgrading of AMS injection system for increasing mass resolution, new particle identification techniques for separation of isobars, development of the AMS measurement methods for 99 Tc, 93 Zr, 151 Sm and 182 Hf analyses, and applications in biology, environment and nuclear astrophysics. (authors)

  6. SOR/88-144, Atomic Energy Control Regulations, amendment

    International Nuclear Information System (INIS)

    1988-01-01

    These amendments dated 25 February 1988 mainly concern naturally-occurring radioactive prescribed substances (namely, uranium, thorium, radium, etc.). Any naturally-occurring radioactive material in a mineral or other material which has not been related to an activity associated with the development, application or use of atomic energy, is exempted from the scope of the Regulations. The Regulations will therefore not apply to such radioactive substances present in building materials or in minerals commonly used in industrial activities which are not associated with the nuclear fuel cycle. This exemption does not apply to such material in connection with import control and preparation for transport. (NEA)

  7. Proceedings of the eleventh Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    Vidovszky, Istvan

    2001-12-01

    The present volume contains 57 papers, presented on the eleventh Symposium of Atomic Energy Research, held in Csopak, Hungary, 24-28 September 2001. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Improvement of Neutron Physical Codes and Methods, Reactor Kinetics and Dynamics, Thermal-Hydraulics, Spent Fuel - Criticality Radiation, Fuel Behaviour, Spent Fuel Transmutation, Evaluation of Reactor Physical Measurements, Core Design-Core Calculations-according to the presentation sequence on the Symposium (Author)

  8. Cooperation in research in the European Atomic Energy Community (EURATOM)

    International Nuclear Information System (INIS)

    Marka, Philippe.

    1977-01-01

    This work studies the legal instruments for cooperative research granted to Euratom under the Treaty establishing the European Atomic Energy Community, and the conditions whereby concrete use was made of these instruments. This assessment of Euratom's efforts to launch a community nuclear industry is accompanied by an analysis of the respective roles of the bodies of the Community, the Council and the Commission, as well as of the circumstances which, according to the author, have led to a paralysis of this institution. (NEA) [fr

  9. Proceedings of the 16. Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    Vidovszky, Istvan

    2006-10-01

    The present volume contains 56 papers, presented on the sixteenth Symposium of Atomic Energy Research, held in Bratislava, Slovakia, 25-29 September 2006. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Spectral and Core Calculation, Core Operation Experiments and Code Validation, Fuel Management, Core Surveillance and Monitoring, Reactor Dynamics Thermal Hydraulics and Safety Analysis, Physical Problems of Spent Fuel Decommissioning, and Radwaste, Actinide Transmutation and Spent Fuel Disposal - according to the presentation sequence on the Symposium (Author)

  10. Proceedings of the twentieth symposium of atomic energy research

    International Nuclear Information System (INIS)

    Vidovszky, I.

    2010-10-01

    The present volume contains 69 papers, presented on the twentieth symposium of atomic energy research, held in Hanasaari, Espoo, Finland, 20-24 September 2010. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Fuel Management, Spectral and Core Calculations, Core Surveillance and Monitoring, CFD Analysis, Reactor Dynamics Thermal Hydraulics and Safety Analysis, Physical Problems of Spent Fuel Decommissioning and Radwaste, Actinide Transmutation and Spent Fuel Disposal, Core Operation, Experiments and Code Validation - according to the presentation sequence on the Symposium. (Author)

  11. Air pollution aspects of the atomic energy industry

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    Meteorology is important to the atomic energy industry for engineering and operational applications common to industry generally, but, in particular, it is important because of its usefulness when dealing with radioactivity in the atmosphere. Meteorology must be used in estimating environmental exposure risks if radioactivity is released through tall stacks and laboratory type vents as part of a routine waste disposal procedure or when it is necessary to consider accidental releases under a variety of circumstances. An outstanding use of meteorology is in the estimation of the spread of contaminants from a reactor disaster. The nature of radioactive materials and their sources are discussed. 7 figures

  12. The Atomic Energy of Canada Limited (AECL) employee health study

    International Nuclear Information System (INIS)

    Myers, D.K.; Werner, M.M.

    1985-01-01

    A preliminary examination of records relating to past Chalk River employees provides some reassurance that large numbers of cancer deaths that might be related to occupational radiation exposure do not exist in the groups of employees studied to the end of 1982. The lack of reliable information on deaths of ex-employees who left AECL for other employment prevented the inclusion of this group in this preliminary study. This information will presumably be obtained during the course of the more comprehensive Atomic Energy of Canada Ltd. employee health study. 6 refs

  13. Nuclear energy: fusion and fission - From the atomic nucleus to energy

    International Nuclear Information System (INIS)

    2002-09-01

    Matter is made up of atoms. In 1912, the English physicist Ernest Rutherford (who had shown that the atom had a nucleus), and the Danish physicist Niels Bohr developed a model in which the atom was made up of a positively charged nucleus surrounded by a cloud of electrons. In 1913, Rutherford discovered the proton, and in 1932, the English physicist Chadwick discovered the neutron. In 1938, Hahn and Strassmann discovered spontaneous fission and the French physicist Frederic Joliot-Curie, assisted by Lew Kowarski and Hans Von Halban, showed in 1939 that splitting uranium nuclei caused an intense release of heat. The discovery of the chain reaction would enable the exploitation of nuclear energy. 'It was the Second World War leaders who, by encouraging research for military purposes, contributed to the development of nuclear energy'. During the Second World War, from 1939 to 1945, studies of fission continued in the United States, with the participation of emigre physicists. The Manhattan project was launched, the aim of which was to provide the country with a nuclear weapon (used at Hiroshima and Nagasaki in 1945). After the war ended, research into energy production by the nuclear fission reaction continued for civil purposes. CEA (the French Atomic Energy Commission) was set up in France in 1945 under the impetus of General de Gaulle. This public research body is responsible for giving France mastery of the atom in the research, health, energy, industrial, safety and defense sectors. (authors)

  14. On mechanism of low-energy heavy ions scattering on a target surface with small atomic mass

    CERN Document Server

    Umarov, F F; Kudryashova, L B; Krylov, N M

    2002-01-01

    In the present work, an experimental study of low-energy (E sub 0 =20-500 eV) heavy Cs sup + ions scattering on target surfaces with small atomic masses (Al, Si, Ni) has been performed for more accurate definition of mechanism of scattering and evaluation of an opportunity for use of heavy ions scattering as a tool of surface layer analysis. It is shown that the dependence of the relative energies of scattered ions versus the initial energy E/E sub 0 (E sub 0) for Si (E sub b =4.64 eV/atom) and Ni (E sub b =4.43 eV/atom) approximately coincide despite the fact that the mass of Ni atom is twice as large as that of the Si atom mass. At the same time their binding energies E sub b are approximately equal to each other. It is found that the scattering angles of Cs sup + ions considerably exceed a limiting scattering angle theta sub l sub i sub m in a single collision. It has been established that the scattering of low-energy heavy ions by light targets is described by a non-binary mechanism of many-particle inter...

  15. An Accurate Redetermination of the $^{118}Sn$ Binding Energy

    CERN Document Server

    Borzakov, S B; Faikow-Stanczyk, H; Grigoriev, Yu V; Panteleev, T; Pospísil, S; Smotritsky, L M; Telezhnikov, S A

    2001-01-01

    The energy of well-known strong {gamma}-line from {{^198}Au}, the "gold standard", has been modified in the light of new adjustments in the fundamental constants and the value of 411.80176(12) keV was determined which is 0.29 eV lower than the latest 1999 value. An energy calibration procedure for determining the neutron binding energy, {B_n}, from complicated {(n , gamma)}-spectra has been developed. A mathematically simple minimization function consisting only of terms having as parameters the coefficients of the energy calibration curve (polynomial) is used. A priori information about the relationships among the energies of different peaks on the spectrum is taking into account by a Monte Carlo simulation. The procedure was used in obtaining of {B_n} for {{^118}Sn} and {{^64}Cu}. The {gamma}-ray spectrum from thermal neutron radiative capture by {{^117}Sn} has been measured on the IBR-2 pulsed reactor. {gamma}-rays were detected by a 72 cm^3 HPGe-detector. {B_n} for {{^64}Cu} was obtained from two {gamma}-...

  16. Exciton binding energy in a pyramidal quantum dot

    Science.gov (United States)

    Anitha, A.; Arulmozhi, M.

    2018-05-01

    The effects of spatially dependent effective mass, non-parabolicity of the conduction band and dielectric screening function on exciton binding energy in a pyramid-shaped quantum dot of GaAs have been investigated by variational method as a function of base width of the pyramid. We have assumed that the pyramid has a square base with area a× a and height of the pyramid H=a/2. The trial wave function of the exciton has been chosen according to the even mirror boundary condition, i.e. the wave function of the exciton at the boundary could be non-zero. The results show that (i) the non-parabolicity of the conduction band affects the light hole (lh) and heavy hole (hh) excitons to be more bound than that with parabolicity of the conduction band, (ii) the dielectric screening function (DSF) affects the lh and hh excitons to be more bound than that without the DSF and (iii) the spatially dependent effective mass (SDEM) affects the lh and hh excitons to be less bound than that without the SDEM. The combined effects of DSF and SDEM on exciton binding energy have also been calculated. The results are compared with those available in the literature.

  17. Non-abelian binding energies from the lightcone bootstrap

    Energy Technology Data Exchange (ETDEWEB)

    Li, Daliang [Department of Physics, Yale University,New Haven, CT 06511 (United States); Department of Physics and Astronomy, Johns Hopkins University,Baltimore, MD 21218 (United States); Meltzer, David [Department of Physics, Yale University,New Haven, CT 06511 (United States); Poland, David [Department of Physics, Yale University,New Haven, CT 06511 (United States); School of Natural Sciences, Institute for Advanced Study,Princeton, NJ 08540 (United States)

    2016-02-23

    We analytically study the lightcone limit of the conformal bootstrap for 4-point functions containing scalars charged under global symmetries. We show the existence of large spin double-twist operators in various representations of the global symmetry group. We then compute their anomalous dimensions in terms of the central charge C{sub T}, current central charge C{sub J}, and the OPE coefficients of low dimension scalars. In AdS, these results correspond to the binding energy of two-particle states arising from the exchange of gravitons, gauge bosons, and light scalar fields. Using unitarity and crossing symmetry, we show that gravity is universal and attractive among different types of two-particle states, while the gauge binding energy can have either sign as determined by the representation of the two-particle state, with universal ratios fixed by the symmetry group. We apply our results to 4D N=1 SQCD and the 3D O(N) vector models. We also show that in a unitary CFT, if the current central charge C{sub J} stays finite when the global symmetry group becomes infinitely large, such as the N→∞ limit of the O(N) vector model, then the theory must contain an infinite number of higher spin currents.

  18. The four decades of Korea Atomic Energy Research Institute through pictures

    International Nuclear Information System (INIS)

    2000-04-01

    This reports the process and development of Korea Atomic Energy Research Institute with a lot of photos. It is divided five parts, which includes the introduction of the purpose of publication, the quickening period of nuclear Atomic Energy during 1960s the period of building foundation on nuclear power during 1970s the period for technical independence for nuclear atomic energy during 1980s and maturity on technical independence for nuclear atomic energy during 1990s. It deals with the history of Korea Atomic Energy Research Institute from 1959 to 1990.

  19. The uses of atomic energy for the economic and social development in the German Democratic Republic

    International Nuclear Information System (INIS)

    1987-01-01

    A report is given on the peaceful uses of atomic energy in the GDR. The following topics are discussed: (1) present state and prospects of the utilization of atomic energy in the GDR, (2) protection against the dangers from the use of atomic energy, (3) the GDR's share in international efforts to secure the peaceful uses and to further the development of atomic energy, and (4) conclusions for the enhancement of international cooperation in the peaceful uses of atomic energy. 2 tabs., 6 figs., and 23 color and 3 black-and-white plates are included

  20. Atomic structure of nitrate-binding protein crucial for photosynthetic productivity

    Energy Technology Data Exchange (ETDEWEB)

    Koropatkin, Nicole M.; Pakrasi, Himadri B.; Smith, Thomas J.

    2006-06-27

    C) that regulates transport (4). NrtA binds both nitrate and nitrite (Kd = 0.3 mM) and is necessary for cell survival when nitrate is the primary nitrogen source (5). The role of NrtA is to scavenge nitrate/nitrite from the periplasm for delivery to the membrane permease, NrtB. The passage of solute through the transmembrane pore is linked to ATP hydrolysis by NrtC and NrtD. NrtD consists of a single ATPase domain. In contrast, NrtC contains both an ATPase domain and a Cterminal solute-binding domain that shares 50% amino acid sequence similarity with NrtA, and is required for the ammonium-mediated inhibition of nitrate transport (6, 7). Aside from the homologous transporter for bicarbonate, CmpABCD, there are no other known examples of ABC transporters that have an ATPase/solute-binding fusion component. The specificity of the nitrate transporter is conferred by NrtA (4). NrtA is ~49% identical (60% similar) in amino acid sequence to the bicarbonate receptor CmpA. In its entirety, it does not have significant homology to any other known protein. To elucidate the molecular determinants of nitrate specificity, we determined the crystal structure of the Synechocystis 6803 NrtA to 1.5 Å. While the general shape of NrtA is akin to that of other solute binding proteins, NrtA clearly represents a new and unique structural variant of these ‘C clamp’ proteins. From this structure and sequence alignments of other bicarbonate and nitrate transporters, the molecular basis for solute selectivity is clear and suggests that regulatory domains of both icarbonate and nitrate transport systems bind nitrate. Based on these findings, a model is presented that 4 demonstrates how such synergistic regulation of bicarbonate and nitrate transport is important in conserving energy during the process of carbon fixation and nitrogen assimilation.

  1. Proposal for the International Atomic Energy Agency Training Course

    International Nuclear Information System (INIS)

    McCarthy, T.L.

    1994-06-01

    The Hanford Site has hosted similar activities, including both Hanford Summits I and II. The Hanford Summits were two-day televised events to discuss the commitment of the current Presidential administration to the environmental restoration of the Hanford Site. Public involvement and strategic issues established from Hanford Summit I include: Regulatory issues, training and education, economic development and partnership, and technology transfer. Hanford Summit II provided a summary of how Secretary of Energy O'Leary is proceeding on the above strategic issues. The DOE and Westinghouse School for Environmental Excellence frequently offers a six-week course for environmental professionals and workers. Approximately thirty to forty individuals attend the training course, which provides training in environmental regulation compliance. The Hanford Site has hosted two previous International Atomic Energy Agency training courses. The courses lasted two weeks and had approximately eight to ten participants. Nuclear Material Management and Neutron Monitoring were the courses hosted by the Hanford Site

  2. Public opinion on atomic energy after JCO accident

    International Nuclear Information System (INIS)

    Okamoto, Koichi; Miyamoto, Sosuke; Ishikawa, Masayori; Shimomura, Hideo; Hori, Hiromoto; Suzuki, Yasuko; Kamise, Yumiko

    2004-04-01

    JCO accident happened on September 30, 1999. This book deals with the public opinion of atomic energy after JCO accident in Japan and comparison with that of USA and France. The analysis of public opinion structure is also shown. The important chapter is the eighth chapter a n opinion survey after the accident , of which sampling areas consisted of three areas such as JCO accident area, the nuclear power plants and the general cities. The analytical results of data showed that the public opinion in Tokai-mura and Naka-machi, the JCO accident area, indicated moderate opinions. It is the interesting results were obtained that the moderate tendency of opinion was in order JCO accident area, the nuclear power plants and the general cities. People's attitude toward nuclear energy related to their social values. Abstract of JCO accident, JCO structure, the effects of accident on the environment and news stories about the accident are reported. (S.Y.)

  3. International human cooperation in Japan Atomic Energy Research Institute

    International Nuclear Information System (INIS)

    Shiba, Koreyuki; Kaieda, Keisuke; Makuuchi, Keizo; Takada, Kazuo; Nomura, Masayuki

    1997-01-01

    Rearing of talented persons in the area of nuclear energy is one of the important works in Japan Atomic Energy Research Institute. In this report, the present situations and future schedules of international human cooperation in this area wsere summarized. First, the recent activities of International Nuclear Technology Center were outlined in respect of international human cooperation. A study and training course which was started in cooperation with JICA and IAEA from the middle of eighties and the international nuclear safety seminar aiming at advancing the nuclear safety level of the world are now being put into practice. In addition, a study and training for rearing talented persons was started from 1996 to improve the nuclear safety level of the neighbouring countries. The activities of the nuclear research interchange system by Science and Technology Agency established in 1985 and Bilateral Co-operation Agreement from 1984 were explained and also various difficulties in the international cooperation were pointed out. (M.N.)

  4. Atomic energy-level and Grotrian diagrams. Vol. 4

    International Nuclear Information System (INIS)

    Bashkin, S.; Stoner, J.O. Jr.

    1982-01-01

    This is the fifth in a series of volumes that present diagrammatically the spectra of atoms and monatomic ions. All observed transitions and all known levels of manganese are included. All wavelengths are given in angstroms in vacuum below 2000 A, in air above 2000 A. Energies of levels are specified in wavenumbers (cm -1 ), kcm -1 (1 X 10 3 cm -1 ), or Mcm -1 (1 X 10 6 cm -1 ). For energies, all experimentally significant figures are included; for wavelengths, we usually include two decimal places (three for the shortest wavelengths). Descriptions of levels are based in most cases upon the largest percentage contributions of elementary coupling arrangements to the levels. In a few instances several different descriptions of the same levels are presented. (Auth.)

  5. ASTROPHYSICS. Atom-interferometry constraints on dark energy.

    Science.gov (United States)

    Hamilton, P; Jaffe, M; Haslinger, P; Simmons, Q; Müller, H; Khoury, J

    2015-08-21

    If dark energy, which drives the accelerated expansion of the universe, consists of a light scalar field, it might be detectable as a "fifth force" between normal-matter objects, in potential conflict with precision tests of gravity. Chameleon fields and other theories with screening mechanisms, however, can evade these tests by suppressing the forces in regions of high density, such as the laboratory. Using a cesium matter-wave interferometer near a spherical mass in an ultrahigh-vacuum chamber, we reduced the screening mechanism by probing the field with individual atoms rather than with bulk matter. We thereby constrained a wide class of dark energy theories, including a range of chameleon and other theories that reproduce the observed cosmic acceleration. Copyright © 2015, American Association for the Advancement of Science.

  6. Department of Atomic Energy [India]: Annual report 1978-79

    International Nuclear Information System (INIS)

    1979-01-01

    The research and development activities and achievements of the research organizations of the Department of Atomic Energy (DAE, India), progress of various DAE projects underway and performance of nuclear power plants and other public sector underking of DAE have been reported. The report covers the financial year 1978-79. Some of the major achievements during the year have been: (1) development of a portable local vacuum electron beam welding machine, (2) commissioning of the Variable Energy Cyclotron, Calcutta for obtaining an external beam of 30 MeV alphas, (4) locating minute leaks by tracer techniques on the 140 km. Koyali-Viramgam Oil pipeline and (5) investigation by tracer technique of geological fault at the Lakya dam site of the Kudremukh Iron Ore Project in Karnataka. The R and D work of the Bhabha Atomic Research Centre, Bombay; Reactor Research Centre, Kalpakkam; Tata Institute of Fundamental Research, Bombay; Saha Institute of Nuclear Physics, Calcutta, Tata Memorial Centre and Cancer Research Centre both at Bombay is summarised. (M.G.B.)

  7. R and D policy of the Hungarian Atomic Energy Authority

    International Nuclear Information System (INIS)

    Berki, Tamas; Macsuga, Geza; Neubauer, Istvan

    2010-01-01

    The Hungarian Atomic Energy Authority (HAEA) is authorised by the prescriptions of the law on Atomic Energy to support research and development activities in those scientific and technical areas, which primarily contribute to performing the nuclear safety regulatory responsibility and improving effectiveness and efficiency of licensing, inspection and assessment activities. HAEA's Research and Development program is an essential one: it is run on significant financial resources and with the involvement of a wide range of Technical Support Organisations (TSO). Therefore appropriate priorities have to be applied and directions have to be followed when decisions are made on activities to be supported by the HAEA. These priorities and strategic directions for the R and D activities are defined in the Research and Development Policy of HAEA, which was lastly revised in 2008. The report introduces the summary evaluation and major results of R and D activities sponsored by the HAEA in the previous 2005-2008 cycle and the directions and general elements of the R and D Policy of the ongoing period 2009-2012. (author)

  8. Freedom or security - the unsolvable dilemma of atomic energy

    International Nuclear Information System (INIS)

    Rossnagel, A.

    1989-01-01

    The threat of a non-peaceful use of atomic energy is not a fixed quantity. The hazard may increase depending on the social situation and the insentity of social crises emerging. In view of the damage potential involved with atomic energy, the principle of 'dynamic protection of civil rights' requires security measures to be intensified according to growing threat. The restrictions of freedom connected with enhanced security measures are to be felt already today. The pressure for security of nuclear installations or material creates a dilemma: any security step-up will be done at the expense of freedom, and conserving freedom will mean reducing security. The pressure for security which is achieved by the instruments of balancing the objects of legal protection and following the principle of reasonablenesse, will eventually lead to a de facto decline of the civil rights by way of a clandestine and gradual change of legal terms and definitions. We even then would be living in a constitutional state. But what will freedom then mean? The civil rights would still be incorporated in our Basic Law, but protection in practical life will have been decreased. (orig./HSCH) [de

  9. Limited and unlimited liability in the German Atomic Energy Law

    International Nuclear Information System (INIS)

    Pelzer, N.

    1982-01-01

    The liability of operators of nuclear installations in the FRG is limited under current law to the sum of one thousand million DM (section 31 of the Atomic Energy law). Since about the autumn of 1979, the Federal Ministry of the Interior is making inquiries into the necessity and appropriateness of abandoning the provision on liability limitations, in order to improve the victims compensation. The legal problems involved in this decision are presented by the author, trying to answer the question of whether the current system of liability limitations should be maintained or abandoned by discussing this issue from the point of view of the legal functions ''justice'' and ''expedience'' of this provision. The manifold international interlacement of the atomic energy law does not allow this study to be restricted to the law of the FRG. A brief review of the development and current state of the international nuclear liability law is the basis of this study into the problems of a possible modification of the German nuclear liability provisions. The study is carried out with the purpose of elaborating model solutions. (orig./HP) [de

  10. Various high precision measurements of pressure in atomic energy industry

    International Nuclear Information System (INIS)

    Aritomi, Masanori; Inoue, Akira; Hosoma, Takashi; Tanaka, Izumi; Gabane, Tsunemichi.

    1987-01-01

    As for the pressure measurement in atomic energy industry, it is mostly the measurement using differential pressure transmitters and pressure transmitters for process measurement with the general accuracy of measurement of 0.2 - 0.5 % FS/year. However, recently for the development of nuclear fusion reactors and the establishment of nuclear fuel cycle accompanying new atomic energy technology, there are the needs of the pressure measurement having higher accuracy of 0.01 % FS/year and high resolution, and quartz vibration type pressure sensors appeared. New high accuracy pressure measurement techniques were developed by the advance of data processing and the rationalization of data transmission. As the results, the measurement of the differential pressure of helium-lithium two-phase flow in the cooling system of nuclear fusion reactors, the high accuracy measuring system for the level of plutonium nitrate and other fuel substance in tanks in fuel reprocessing and conversion, the high accuracy measurement of atmospheric pressure and wind velocity in ducts, chimneys and tunnels in nuclear facilities and so on became feasible. The principle and the measured data of quartz vibration type pressure sensors are shown. (Kako, I.)

  11. Anisotropic Lithium Insertion Behavior in Silicon Nanowires: Binding Energy, Diffusion Barrier, and Strain Effect

    KAUST Repository

    Zhang, Qianfan; Cui, Yi; Wang, Enge

    2011-01-01

    Silicon nanowires (SiNWs) have recently been shown to be promising as high capacity lithium battery anodes. SiNWs can be grown with their long axis along several different crystallographic directions. Due to distinct atomic configuration and electronic structure of SiNWs with different axial orientations, their lithium insertion behavior could be different. This paper focuses on the characteristics of single Li defects, including binding energy, diffusion barriers, and dependence on uniaxial strain in [110], [100], [111], and [112] SiNWs. Our systematic ab initio study suggests that the Si-Li interaction is weaker when the Si-Li bond direction is aligned close to the SiNW long axis. This results in the [110] and [111] SiNWs having the highest and lowest Li binding energy, respectively, and it makes the diffusion barrier along the SiNW axis lower than other pathways. Under external strain, it was found that [110] and [001] SiNWs are the most and least sensitive, respectively. For diffusion along the axial direction, the barrier increases (decreases) under tension (compression). This feature results in a considerable difference in the magnitude of the energy barrier along different diffusion pathways. © 2011 American Chemical Society.

  12. Anisotropic Lithium Insertion Behavior in Silicon Nanowires: Binding Energy, Diffusion Barrier, and Strain Effect

    KAUST Repository

    Zhang, Qianfan

    2011-05-19

    Silicon nanowires (SiNWs) have recently been shown to be promising as high capacity lithium battery anodes. SiNWs can be grown with their long axis along several different crystallographic directions. Due to distinct atomic configuration and electronic structure of SiNWs with different axial orientations, their lithium insertion behavior could be different. This paper focuses on the characteristics of single Li defects, including binding energy, diffusion barriers, and dependence on uniaxial strain in [110], [100], [111], and [112] SiNWs. Our systematic ab initio study suggests that the Si-Li interaction is weaker when the Si-Li bond direction is aligned close to the SiNW long axis. This results in the [110] and [111] SiNWs having the highest and lowest Li binding energy, respectively, and it makes the diffusion barrier along the SiNW axis lower than other pathways. Under external strain, it was found that [110] and [001] SiNWs are the most and least sensitive, respectively. For diffusion along the axial direction, the barrier increases (decreases) under tension (compression). This feature results in a considerable difference in the magnitude of the energy barrier along different diffusion pathways. © 2011 American Chemical Society.

  13. Adsorption Energies of Carbon, Nitrogen, and Oxygen Atoms on the Low-temperature Amorphous Water Ice: A Systematic Estimation from Quantum Chemistry Calculations

    Science.gov (United States)

    Shimonishi, Takashi; Nakatani, Naoki; Furuya, Kenji; Hama, Tetsuya

    2018-03-01

    We propose a new simple computational model to estimate the adsorption energies of atoms and molecules to low-temperature amorphous water ice, and we present the adsorption energies of carbon (3 P), nitrogen (4 S), and oxygen (3 P) atoms based on quantum chemistry calculations. The adsorption energies were estimated to be 14,100 ± 420 K for carbon, 400 ± 30 K for nitrogen, and 1440 ± 160 K for oxygen. The adsorption energy of oxygen is consistent with experimentally reported values. We found that the binding of a nitrogen atom is purely physisorption, while that of a carbon atom is chemisorption, in which a chemical bond to an O atom of a water molecule is formed. That of an oxygen atom has a dual character, with both physisorption and chemisorption. The chemisorption of atomic carbon also implies the possibility of further chemical reactions to produce molecules bearing a C–O bond, though this may hinder the formation of methane on water ice via sequential hydrogenation of carbon atoms. These properties would have a large impact on the chemical evolution of carbon species in interstellar environments. We also investigated the effects of newly calculated adsorption energies on the chemical compositions of cold dense molecular clouds with the aid of gas-ice astrochemical simulations. We found that abundances of major nitrogen-bearing molecules, such as N2 and NH3, are significantly altered by applying the calculated adsorption energy, because nitrogen atoms can thermally diffuse on surfaces, even at 10 K.

  14. Importance of length and sequence order on magnesium binding to surface-bound oligonucleotides studied by second harmonic generation and atomic force microscopy.

    Science.gov (United States)

    Holland, Joseph G; Geiger, Franz M

    2012-06-07

    The binding of magnesium ions to surface-bound single-stranded oligonucleotides was studied under aqueous conditions using second harmonic generation (SHG) and atomic force microscopy (AFM). The effect of strand length on the number of Mg(II) ions bound and their free binding energy was examined for 5-, 10-, 15-, and 20-mers of adenine and guanine at pH 7, 298 K, and 10 mM NaCl. The binding free energies for adenine and guanine sequences were calculated to be -32.1(4) and -35.6(2) kJ/mol, respectively, and invariant with strand length. Furthermore, the ion density for adenine oligonucleotides did not change as strand length increased, with an average value of 2(1) ions/strand. In sharp contrast, guanine oligonucleotides displayed a linear relationship between strand length and ion density, suggesting that cooperativity is important. This data gives predictive capabilities for mixed strands of various lengths, which we exploit for 20-mers of adenines and guanines. In addition, the role sequence order plays in strands of hetero-oligonucleotides was examined for 5'-A(10)G(10)-3', 5'-(AG)(10)-3', and 5'-G(10)A(10)-3' (here the -3' end is chemically modified to bind to the surface). Although the free energy of binding is the same for these three strands (averaged to be -33.3(4) kJ/mol), the total ion density increases when several guanine residues are close to the 3' end (and thus close to the solid support substrate). To further understand these results, we analyzed the height profiles of the functionalized surfaces with tapping-mode atomic force microscopy (AFM). When comparing the average surface height profiles of the oligonucleotide surfaces pre- and post- Mg(II) binding, a positive correlation was found between ion density and the subsequent height decrease following Mg(II) binding, which we attribute to reductions in Coulomb repulsion and strand collapse once a critical number of Mg(II) ions are bound to the strand.

  15. The Atomic Energy Commission's Annual Report to Congress for 1960. Major Activities in the Atomic Energy Programs, January - December 1960

    Energy Technology Data Exchange (ETDEWEB)

    McCone, John A.

    1961-01-31

    The document covers activities for the period January - December 1960. The report consists of two parts: Part One, The Atomic Energy Industry in 1960 and Related Activities; and Part Two, Major Activities in Atomic Energy Programs. Twenty-one appendices are also included.

  16. Studies of the energy density functional and its derivatives in atomic and molecular systems

    International Nuclear Information System (INIS)

    Robles, J.

    1986-01-01

    The first chapter is a review of formal density functional theory, (DFT). In the second chapter, approximations to exact DFT are reviewed. In chapter three, the author proposes a modified molecular Thomas-Fermi, (TF) theory. He proceeds by imposing a continuity condition on the density. This avoids the singularities at the nuclei of classical TF. The method is sanctioned by Teller and Balasz theorems. However, it is found that while the classical TF theory is improved, the present method still predicts no-binding. In chapter four, it is suggested that the correlation energy, (E/sub c/), is proportional to the exchange energy, (K), E/sub c/ = cK. This idea is tested with Hartree-Fock (HF) and DFT data. In HF, c = 1/40 for atoms and c = 1/25 for molecules. Furthermore, the method is used to estimate dissociation energies. Thereafter, the author studies the chemical potential, (μ), of atoms (chapter five) and molecules (chapter six). In chapter seven, the concept of local pressure in an inhomogeneous electronic system is studied and extended, within the local thermodynamic formulation of DFT. Finally, appendix A provides the required mathematical framework (basic functional calculus) to understand this work, while appendix B is essentially a summary of the HF method

  17. Fundamentals of low-energy neutral atom imaging

    International Nuclear Information System (INIS)

    McComas, D.J.; Funsten, H.O.; Gosling, J.T.; Moore, K.R.; Scime, E.E.; Thomsen, M.F.

    1994-01-01

    Imaging of the space plasma environment via low-energy neutral atoms (LENAs) promises to revolutionize the way in which large-scale space plasma phenomena are viewed and understood. LENAs are produced by charge exchange between plasma ions (less than tens of kilo-electron-volts) and cold geocoronal neutrals; these LENAs radiate outward in all directions from their points of origin. Previously developed methods for imaging higher energy neutrals are not suitable for observing the majority of the terrestrial magnetosphere, which is comprised primarily of lower energy plasma populations. This paper briefly describes both the direct and indirect techniques that have been suggested for imaging LENAs to date. The authors then examine in more detail the most advanced of these techniques appropriate for magnetospheric imaging, indirect detection based on ionization of LENAs as they transit ultra thin foils. Such a LENA imager consists of four basic components: (1) a biased collimator to remove the ambient charged particles and set the azimuthal field of view; (2) an ultra thin foil, which ionizes a portion of the incident LENAs; (3) an electrostatic analyzer to reject UV light and set the energy passband; and (4) a coincidence position detector to measure converted LENAs while rejecting noise and penetrating radiation

  18. Atoms

    International Nuclear Information System (INIS)

    Fuchs, Alain; Villani, Cedric; Guthleben, Denis; Leduc, Michele; Brenner, Anastasios; Pouthas, Joel; Perrin, Jean

    2014-01-01

    Completed by recent contributions on various topics (atoms and the Brownian motion, the career of Jean Perrin, the evolution of atomic physics since Jean Perrin, relationship between scientific atomism and philosophical atomism), this book is a reprint of a book published at the beginning of the twentieth century in which the author addressed the relationship between atomic theory and chemistry (molecules, atoms, the Avogadro hypothesis, molecule structures, solutes, upper limits of molecular quantities), molecular agitation (molecule velocity, molecule rotation or vibration, molecular free range), the Brownian motion and emulsions (history and general features, statistical equilibrium of emulsions), the laws of the Brownian motion (Einstein's theory, experimental control), fluctuations (the theory of Smoluchowski), light and quanta (black body, extension of quantum theory), the electricity atom, the atom genesis and destruction (transmutations, atom counting)

  19. An atomic empire a technical history of the rise and fall of the British atomic energy programme

    CERN Document Server

    Hill, C N

    2013-01-01

    Britain was the first country to exploit atomic energy on a large scale, and at its peak in the mid-1960s, it had generated more electricity from nuclear power than the rest of the world combined.The civil atomic energy programme grew out of the military programme which produced plutonium for atomic weapons. In 1956, Calder Hall power station was opened by the Queen. The very next year, one of the early Windscale reactors caught fire and the world's first major nuclear accident occurred.The civil programme ran into further difficulty in the mid-1960s and as a consequence of procrastination in

  20. Fundamental plan of atomic energy development and utilization in fiscal year 1986 related to atomic energy safety

    International Nuclear Information System (INIS)

    1986-01-01

    The Nuclear Safety Commission decided to report to the Prime Minister after having determined this matter by assuming the passage of the budget draft for fiscal year 1986 as the prerequisite. As the fundamental policy, in order to cope with the advance of atomic energy development and utilization, such as the promotion of nuclear power generation and the construction of a prototype FBR, a demonstration ATR, a reprocessing plant and other nuclear fuel cycle facilities, it is required to perfect the measures for ensuring the safety of atomic energy. For this purpose, the perfecting of the function of Nuclear Safety Commission and the system for safety examination, inspection and operation management and supervision in Government organs, the improvement of the quality of operators, the safety regulation of radioactive waste treatment and disposal, and the perfecting of the laws related to the regulation of nuclear raw materials, nuclear fuel and nuclear reacters are carried out. The research on the engineering safety of LWRs, the reactors of new types and reprocessing facilities, the research on the prevention of radiation injuries and the research on the safety of radioactive wastes are advanced. The establishment of nuclear fuel cycle, and the research on reactor decommissioning, the development of new type reactors and nuclear fusion are promoted from the viewpoint of safety. (Kako, I.)

  1. Atomic energy in its repercussions on life and health. [In French

    Energy Technology Data Exchange (ETDEWEB)

    1956-01-01

    The papers given at the July 1955 conference in Paris on the dangers of atomic energy and radiation are presented. The topics discussed include the dangers inherent in atomic equipment, the radioactive effects of atomic explosions, a review of the analyses made in Japan of the radioactive ash from the March 1954 Bikini explosions, long distance propagation and characteristics of the radioactive particles emitted in atomic explosions, eventual influences of atomic explosions on evolution, radioactivity in air and rain, radioactive clouds, meteorological effects of atomic explosions, a general review of the biological effects of ionizing radiation, medical problems posed by the immediate effects of atomic explosions, cataracts received from explosions or research in atomic energy, atomic radiation and aquatic life, biological danger from powders emitting ..beta.. rays, effect of weak doses of radiation, ionizing radiation and the gases in atomic industry, and therapy for radiolesions.

  2. An accurate redetermination of the 118Sn binding energy

    International Nuclear Information System (INIS)

    Borzakov, S.B.; Panteleev, Ts.Ts.; Telezhnikov, S.A.; Chrien, R.E.; Faikow-Stanczyk, H.; Grigor'ev, Yu.V.; Pospisil, S.; Smotritskij, L.M.

    2001-01-01

    The energy of well-known strong γ-line from 198 Au, the 'gold standard', has been modified in the light of new adjustments in the fundamental constants and the value of 411.80176(12) keV was determined which is 0.29 eV lower than the latest 1999 value. An energy calibration procedure for determining the neutron binding energy, B n , from complicated (n,γ)-spectra has been developed. A mathematically simple minimization function consisting only of terms having as parameters the coefficients of the energy calibration curve (polynomial) is used. A priori information about the relationships among the energies of different peaks on the spectrum was taken into account by a Monte Carlo simulation. The procedure was used in obtaining of B n for 118 Sn and 64 Cu. The γ-ray spectrum from thermal neutron radiative capture by 117 Sn has been measured on the IBR-2 pulsed reactor. γ-rays were detected by a 72 cm 2 HPGe-detector. B n for 64 Cu was obtained from two γ-spectra. One spectrum was measured on the IBR-2 by the same detector. The other spectrum was measured with a pair spectrometer at the Brookhaven High Flux Beam Reactor. From these two spectra B n for 64 Cu was determined equal to 7915.52(8) keV. The mean value of two most precise results of B n for 118 Sn was determined to be 9326.35(9) keV. The B n for 57Fe was determined to be 7646.08(9) keV

  3. Energy dissipation unveils atomic displacement in the noncontact atomic force microscopy imaging of Si(111 )-(7 ×7 )

    Science.gov (United States)

    Arai, Toyoko; Inamura, Ryo; Kura, Daiki; Tomitori, Masahiko

    2018-03-01

    The kinetic energy of the oscillating cantilever of noncontact atomic force microscopy (nc-AFM) at room temperature was considerably dissipated over regions between a Si adatom and its neighboring rest atom for Si(111 )-(7 ×7 ) in close proximity to a Si tip on the cantilever. However, nc-AFM topographic images showed no atomic features over those regions, which were the hollow sites of the (7 ×7 ). This energy dissipation likely originated from displacement of Si adatoms with respect to the tip over the hollow sites, leading to a lateral shift of the adatoms toward the rest atom. This interaction led to hysteresis over each cantilever oscillation cycle; when the tip was retracted, the Si adatom likely returned to its original position. To confirm the atomic processes involved in the force interactions through Si dangling bonds, the Si(111 )-(7 ×7 ) surface was partly terminated with atomic hydrogen (H) and examined by nc-AFM. When the Si adatoms and/or the rest atoms were terminated with H, the hollow sites were not bright (less dissipation) in images of the energy dissipation channels by nc-AFM. The hollow sites acted as metastable sites for Si adatoms in surface diffusion and atom manipulation; thus, the dissipation energy which is saturated on the tip likely corresponds to the difference in the potential energy between the hollow site and the Si adatom site. In this study, we demonstrated the ability of dissipation channels of nc-AFM to enable visualization of the dynamics of atoms and molecules on surfaces, which cannot be revealed by nc-AFM topographic images alone.

  4. Studies on low energy ion-atom collisions by means of electron-spectroscopy

    International Nuclear Information System (INIS)

    Hirosi Suzuki

    1991-01-01

    The typical results of studies on autoionization processes produced by low energy ion-atom collisions are given by means of the ejected electron spectroscopy, which have been performed by Atomic Physics Group of Sophia University

  5. Higher order corrections to energy levels of muonic atoms

    International Nuclear Information System (INIS)

    Rinker, G.A. Jr.; Steffen, R.M.

    1975-08-01

    In order to facilitate the analysis of muonic x-ray spectra, the results of numerical computations of all higher order quantum electrodynamical corrections to the energy levels of muonic atoms are presented in tabular and graphical form. These corrections include the vacuum polarization corrections caused by emission and reabsorption of virtual electron pairs to all orders, including ''double-bubble'' and ''cracked-egg'' diagrams. An estimate of the Delbruecke scattering-type correction is presented. The Lamb-shift (second- and fourth-order vertex) corrections have been calculated including the correction for the anomalous magnetic moment of the muon. The relativistic nuclear motion (or recoil) correction as well as the correction caused by the screening of the atomic electrons is presented in graphs. For the sake of completeness a graph of the nuclear polarization as computed on the basis of Chen's approach has been included. All calculations were made with a two-parameter Fermi distribution of the nuclear charge density. 7 figures, 23 references

  6. Inevitability of atomic energy in India's power programme

    International Nuclear Information System (INIS)

    Ramanna, R.

    1977-01-01

    The case for atomic energy as the inevitable answer to the energy problem of India has been emphatically put up and supported with data. Hydroelectric power is costly to develop and moreover its potential is not enough to meet India's growing energy requirements. On the grounds of economics and safety, nuclear power has been shown to be superior to power from coal-based power plants. India's proved reserves of coal are 21 billion tonnes out of which 80% has ash content more than 20% and in order to reach only half of the present per capita energy consumption in Europe, the present output of 90 million tonnes/year of coal will have to be increased by a factor of 10, which in addition raises the problem of its transportation to the plant sites. Secondly, total energy from the available coal is estimated at 160 x 10 12 kwh, while that from known reserves of 52,000 tonnes of uranium is 7.2 x 10 12 kwh if used in thermal reactors and 208 x 10 12 kwh if used in fast reactors. Thorium with its known reserves of 320,000 tonnes would give another 1280 x 10 12 kwh. As for safety and ecology, it has been pointed out that : (1) in U.S., the number of coal miners dying of black cancer is 1000 per 10 12 kwh of electricity generated, whereas the fatality rate of uranium miners due to lung cancer is 20 per 10 12 kwh of electricity generated and (2) safety has been the primary concern in all aspects of nuclear technology - mining, fuel production, reactor operation and radioactive waste processing. It has also been explained how the fear of any terrorist getting possession of plutonium for spreading it into atmosphere or making a nuclear bomb is highly improbable, because at any point throughout the fuel cycle plutonium is under strict security surveillance and it is impossible to make a nuclear device without the back-up of powerful laboratory facilities. Finally, India's three stage atomic power programme is described in brief. (M.G.B.)

  7. Proceedings of the ninth Symposium of Atomic Energy Research

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-10-01

    The present volume contains 57 papers. Most of the papers were presented on the ninth Symposium of Atomic Energy Research, held in Demanovska Dolina, Slovakia, 4-6 October 1999. The rest of the papers (intended to be presented but not presented due to difficulties) is included based on the decision of the organizers. The papers are in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Spectral and Core Calculation Methods, Core Operation and Fuel Management, Core Monitoring, Surveillance and Testing, Safety Issues, Neutron Kinetics and Reactor Dynamics, Reactivity Evaluation, High Subcriticality, Critical Safety and Spent Fuel and Spent Fuel Transmutations - according to the presentation sequence on the Symposium. At the end of the volume an alphabetical author index is given.

  8. Proceedings of the ninth Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    1999-10-01

    The present volume contains 57 papers. Most of the papers were presented on the ninth Symposium of Atomic Energy Research, held in Demanovska Dolina, Slovakia, 4-6 October 1999. The rest of the papers (intended to be presented but not presented due to difficulties) is included based on the decision of the organizers. The papers are in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Spectral and Core Calculation Methods, Core Operation and Fuel Management, Core Monitoring, Surveillance and Testing, Safety Issues, Neutron Kinetics and Reactor Dynamics, Reactivity Evaluation, High Subcriticality, Critical Safety and Spent Fuel and Spent Fuel Transmutations - according to the presentation sequence on the Symposium. At the end of the volume an alphabetical author index is given

  9. The International Atomic Energy Agency's program on decontamination and decommissioning

    International Nuclear Information System (INIS)

    Feraday, M.A.

    1989-01-01

    The International Atomic energy Agency (IAEA) is developing an integrated information base that will systematically cover the technical, regulatory, radiation protection, planning, and economic aspects related to the decontamination and decommissioning (D/D) of nuclear facilities. The object of this program is to assist member states in developing the required expertise, equipment, and programs so that they can decommission their nuclear facilities in a safe, timely, and cost-effective manner. In addition to providing information, the IAEA encourages research and provides technical assistance in the form of expert missions, equipment design and procurement, etc., to assist member states in implementing their D/D programs. The technology contained in some recent IAEA reports is reviewed, including the decontamination, segmentation, and demolition of concrete and steel; the recycle/reuse of components from decommissioning; and the reduction of occupational exposures in D/D and the regulatory process in decommissioning. The IAEA's future program is briefly reviewed

  10. Proceedings of the eighth Symposium of Atomic Energy Research

    International Nuclear Information System (INIS)

    Vidovszky, I.

    1998-10-01

    The present volume contains 53 papers, presented on the eighth Symposium of Atomic Energy Research, held in Bystrice nad Perstejnem, Czech Republic, 21-25 September 1998. The papers are presented in their original form, i. e. no corrections or modifications were carried out. The content of this volume is divided into thematic groups: Spectral and Core Calculation Methods, Core Design, Operation and Fuel Management, Core Monitoring, Surveillance and Testing, Neutron Kinetics and reactor Dynamics Methods, Safety Issues and Analysis, Rod Drop Reactivity Measurements, Criticality safety, Spent Fuel and Decommissioning, - according to the presentation sequence on the Symposium. At the end of the volume a list of the participants and an alphabetical author index is given as well

  11. Atomic Energy of Canada Limited annual report 2000-2001

    International Nuclear Information System (INIS)

    2001-01-01

    This is the annual report of the Atomic Energy of Canada Limited for the year ending March 31, 2001 and summarizes the activities of AECL during the period 2000-2001. The activities covered in this report include the CANDU reactor business, with progress being reported in the construction of two CANDU 6 reactors for the Qinshan CANDU project in China, the anticipated completion of Cernavoda unit 2, the completion of spent fuel storage at Cernavoda unit 1 in Romania, as well as the service business with New Brunswick Power, Ontario Power Generation, Bruce Power and Hydro Quebec in the refurbishment of operating, CANDU reactors. In the R and D programs discussions continue on funding for the Canadian Neutron Facility for Materials Research (CNF) and progress on the Maple medical isotope reactor

  12. Atomic Energy of Canada Limited annual report 1999-2000

    International Nuclear Information System (INIS)

    2000-01-01

    This is the annual report of the Atomic Energy of Canada Limited for the year ending March 31, 2000, and summarizes the activities of AECL during the period 1999-2000. The activities covered in this report include the CANDU reactor business, with the completion of the Wolsong unit 4 in the Republic of Korea, progress in the construction of two CANDU reactors for the Qinshan CANDU project in China, as well as the service business with Ontario Power Generation in the rehabilitation and life extension of operating CANDU reactors. In the R and D programs there is on-going effort towards the next generation of reactor technologies for CANDU nuclear power plants, discussions continue on the funding for the Canadian Neutron Facility for materials research (CNF) and progress being made on the Maple medical isotope reactor

  13. Atomic energy as an humane endeavor: Retrospective on its development

    International Nuclear Information System (INIS)

    Seaborg, G.T.; Stahlkopf, K.E.

    1989-01-01

    This report is a speech delivered in Tokyo, Japan, by the author. It covers the historical aspects of atomic energy, from the pre-fission days until present. Such pioneer experiments conducted by O. Hahn, L. Meitner, and F. Strassmann to describe barium isotopes as the result of bombardment of uranium with neutrons are discussed. The author also discussed in detail the pre-war nuclear research at Berkeley, a leading center of nuclear research. Such important events as the synthesis and identification of cobalt-60, iodine-131, and technetium-99m are also discussed. The author discussed the nuclear power as a source of electricity and the perspective on the future of nuclear power. 32 refs., 19 figs., 5 tabs

  14. International Atomic Energy Agency Publications. Catalogue 1980-1995

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-08-01

    This catalogue lists all sales publications of the International Atomic Energy Agency issued from 1980 up to the end of 1995 an still available. Some earlier titles which form part of an established series or are still considered of importance have been included. Most Agency publications are issued in English, though some are also available in Chinese, French, Russian or Spanish. This is noted as C for Chinese, E for English, F for French, R for Russian and S For Spanish by the relevant ISBN number. Proceedings of conferences, symposia, seminars and panels, of experts contain papers in their original language (English, French, Russian or Spanish) with abstracts in English and in the original language.

  15. The Atomic Energy Control Board and the uranium mining industry

    International Nuclear Information System (INIS)

    Duncan, R.M.

    The Atomic Energy Control Board controls prescribed substances and nuclear facilities through a licensing system. It is only recently that this system has been applied to the uranium industry. There are four stages in the licensing procedure before a Mine-Mill Facility Operating Licence is issued: exploration requires an underground exploration permit; site approval is needed before the start of the development stage; development approval is required before the construction of the mill and waste management facilities and depends on the information in a preliminary safety report; the granting of a final operating licence occurs after the Board is satisfied with the final safety report, operating policies and principles, tailings management, and decommissioning plans. The Board has resource management policies designed to ensure that uranium reserves are available to meet Canada's needs. The administration of safeguards is also the Board's responsibility. (LL)

  16. Current trend of atomic energy development in Japan- I

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Manne; Yang, M. H.; Yoon, S. W.; Choi, M. J.; Kim, S. M.; Choi, Y. M

    1998-01-01

    After hundreds of meeting including the round table meeting on the atomic energy development policy, their conclusions were as follows: 1. The competitive nuclear fuel cycle should be completed. 2. In order to achieve above objective, the development of fast breeder reactor must be continued, and the utilization of JOYO and MONJU, and the international cooperation are highly recommended. 3. The PNC should focus on the development of the fast breeder reactor and the related fuel cycle and the management of high level radioactive waste. PNC, which had been working on too many projects, must be reformed to a slim and more efficient organization. Although there was a regret that the proposals were prepared in a short time to meet the due date for the budget bill of 1988, the Japanese government will seriously consider their proposal and take several administrative measures such as the revision of the related laws for the realization of their proposals. (author).

  17. Atomic Energy of Canada Limited annual report 1989-1990

    International Nuclear Information System (INIS)

    1990-01-01

    In 1990, after a comprehensive industry review, the Canadian government announced that steps would be taken to revitalize the nuclear industry. Canada's nuclear utilities made a commitment to bear a large share of the cost of nuclear research and development. Atomic Energy of Canada Limited (AECL) reported its first financial loss in twelve years, as anticipated at the start of the year. Four of the 20 CANDU reactors operating worldwide were in the top ten based on lifetime performance. By year-end one foreign and two domestic utilities had announced their intention to build more CANDU units. The federal government has agreed to stabilize AECL's research funding at 1989-90 levels ($31.5 million above levels planned in 1985), has authorized AECL to negotiate with New Brunswick to build Point Lepreau-2 as the prototype for the CANDU-3 reactor, and has allowed the restructuring of AECL so utility and private sector investors can become equity partners in AECL CANDU

  18. Optimal allocation of International Atomic Energy Agency inspection resources

    International Nuclear Information System (INIS)

    Markin, J.T.

    1987-12-01

    The Safeguards Department of the International Atomic Energy Agency (IAEA) conducts inspections to assure the peaceful use of a state's nuclear materials and facilities. Because of limited resources for conducting inspections, the careful disposition of inspection effort among these facilities is essential if the IAEA is to attain its safeguards goals. This report describes an optimization procedure for assigning an inspection effort to maximize attainment of IAEA goals. The procedure does not require quantitative estimates of safeguards effectiveness, material value, or facility importance. Instead, the optimization is based on qualitative, relative prioritizations of inspection activities and materials to be safeguarded. This allocation framework is applicable to an arbitrary group of facilities such as a state's fuel cycle, the facilities inspected by an operations division, or all of the facilities inspected by the IAEA

  19. Safeguards and legal matters 1994. International Atomic Energy Agency Publications

    International Nuclear Information System (INIS)

    1995-01-01

    This catalogue lists all sales publications of the International Atomic Energy Agency dealing with Safeguards and Legal Matters issued during the period 1970-1994. Most publications are published in English, through some are also available in French, Russian and Spanish. Proceedings of conferences, symposia and panels of experts may contain some papers in languages other than English (French, Russian or Spanish), but all of these papers have abstracts in English. If publications are also available in other languages than English, this is noted as C for Chinese, F for French, R for Russian and S for Spanish by the relevant ISBN number. It should be noted that prices of books are quoted in Austrian Schillings. The prices do not include local taxes and are subject to change without notice. All books in this catalogue are 16 x 24 cm, paper-bound, unless otherwise stated

  20. Atomic Physics in the Quest for Fusion Energy and ITER

    International Nuclear Information System (INIS)

    Skinner, Charles H.

    2008-01-01

    The urgent quest for new energy sources has led developed countries, representing over half of the world population, to collaborate on demonstrating the scientific and technological feasibility of magnetic fusion through the construction and operation of ITER. Data on high-Z ions will be important in this quest. Tungsten plasma facing components have the necessary low erosion rates and low tritium retention but the high radiative efficiency of tungsten ions leads to stringent restrictions on the concentration of tungsten ions in the burning plasma. The influx of tungsten to the burning plasma will need to be diagnosed, understood and stringently controlled. Expanded knowledge of the atomic physics of neutral and ionized tungsten will be important to monitor impurity influxes and derive tungsten concentrations. Also, inert gases such as argon and xenon will be used to dissipate the heat flux flowing to the divertor. This article will summarize the spectroscopic diagnostics planned for ITER and outline areas where additional data is needed.

  1. The role and structure of the Atomic Energy Control Board

    International Nuclear Information System (INIS)

    Hamel, P.E.

    1981-04-01

    The Atomic Energy Control Board is responsible for the control and supervision of the application and use of nuclear materials and the operation of nuclear facilities to ensure that the health and safety of people are protected and that the nuclear materials and equipment are used only in accordance with the government non-proliferation policy. Requirements for control and supervision are made into regulations subject to approval by the Governor in Council. They are applied through a comprehensive licensing system. The interpretation and implementation of the regulations are contained in a series of regulatory documents published from time to time by the Board. The functional organization of staff that assist the Board for the administration, the assessment and issuance of licenses, compliance and inspection, as well as for the management of the regulatory research program is described. (author) [fr

  2. International Atomic Energy Agency Publications. Catalogue 1980-1995

    International Nuclear Information System (INIS)

    1996-08-01

    This catalogue lists all sales publications of the International Atomic Energy Agency issued from 1980 up to the end of 1995 an still available. Some earlier titles which form part of an established series or are still considered of importance have been included. Most Agency publications are issued in English, though some are also available in Chinese, French, Russian or Spanish. This is noted as C for Chinese, E for English, F for French, R for Russian and S For Spanish by the relevant ISBN number. Proceedings of conferences, symposia, seminars and panels, of experts contain papers in their original language (English, French, Russian or Spanish) with abstracts in English and in the original language

  3. Atomic Energy of Canada Limited annual report 1999-2000

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    This is the annual report of the Atomic Energy of Canada Limited for the year ending March 31, 2000, and summarizes the activities of AECL during the period 1999-2000. The activities covered in this report include the CANDU reactor business, with the completion of the Wolsong unit 4 in the Republic of Korea, progress in the construction of two CANDU reactors for the Qinshan CANDU project in China, as well as the service business with Ontario Power Generation in the rehabilitation and life extension of operating CANDU reactors. In the R and D programs there is on-going effort towards the next generation of reactor technologies for CANDU nuclear power plants, discussions continue on the funding for the Canadian Neutron Facility for materials research (CNF) and progress being made on the Maple medical isotope reactor.

  4. Atomic Energy of Canada Limited annual report 2000-2001

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This is the annual report of the Atomic Energy of Canada Limited for the year ending March 31, 2001 and summarizes the activities of AECL during the period 2000-2001. The activities covered in this report include the CANDU reactor business, with progress being reported in the construction of two CANDU 6 reactors for the Qinshan CANDU project in China, the anticipated completion of Cernavoda unit 2, the completion of spent fuel storage at Cernavoda unit 1 in Romania, as well as the service business with New Brunswick Power, Ontario Power Generation, Bruce Power and Hydro Quebec in the refurbishment of operating, CANDU reactors. In the R and D programs discussions continue on funding for the Canadian Neutron Facility for Materials Research (CNF) and progress on the Maple medical isotope reactor.

  5. Binding energy and mechanical stability of single- and multi-walled carbon nanotube serpentines

    International Nuclear Information System (INIS)

    Zhao, Junhua; Lu, Lixin; Rabczuk, Timon

    2014-01-01

    Recently, Geblinger et al. [Nat. Nanotechnol. 3, 195 (2008)] and Machado et al. [Phys. Rev. Lett. 110, 105502 (2013)] reported the experimental and molecular dynamics realization of S-like shaped single-walled carbon nanotubes (CNTs), the so-called CNT serpentines. We reported here results from continuum modeling of the binding energy γ between different single- and multi-walled CNT serpentines and substrates as well as the mechanical stability of the CNT serpentine formation. The critical length for the mechanical stability and adhesion of different CNT serpentines are determined in dependence of E i I i , d, and γ, where E i I i and d are the CNT bending stiffness and distance of the CNT translation period. Our continuum model is validated by comparing its solution to full-atom molecular dynamics calculations. The derived analytical solutions are of great importance for understanding the interaction mechanism between different single- and multi-walled CNT serpentines and substrates

  6. Atomic excitation and molecular dissociation by low energy electron collisions

    International Nuclear Information System (INIS)

    Weyland, Marvin

    2016-01-01

    In this work, momentum imaging experiments have been conducted for the electron impact excitation of metastable states in noble gases and for dissociative electron attachment (DEA) in polyatomic molecules. For the electron impact excitation study a new experimental technique has been developed which is able to measure the scattering angle distribution of the electrons by detection of the momentum transfer to the atoms. Momentum transfer images have been recorded for helium and neon at fixed electron impact energy close to the excitation threshold and good agreement with current R-matrix theory calculations was found. A new momentum imaging apparatus for negative ions has been built for the purpose of studying DEA in biologically relevant molecules. During this work, DEA was investigated in the molecules ammonia, water, formic acid, furan, pyridine and in two chlorofluorocarbons. Furthermore, the change of DEA resonance energies when molecules form clusters compared to monomers was investigated in ammonia and formic acid. The experimental results of most studied molecules could be compared to recent theoretical calculations and they support further development in the theoretical description of DEA. The new apparatus built in this work also delivered a superior momentum resolution compared to existing setups. This allows the momentum imaging of heavier fragments and fragments with lower kinetic energy.

  7. Annual activity report of Atomic Energy Organization of Iran 1981

    International Nuclear Information System (INIS)

    1981-01-01

    Annual research activities of atomic energy organization of Iran AEOI is described for 1981. 1.Nuclear research centre acompolishment is devoted to nuclear physics radiochemistry, reactor operation, electronic and health physics. 2.The nuclear power plants activities are centered on the maintenance of the installed equipments of power plants sites and making use of these installation in the line of countrys needs. 3.Isfahan nuclear technology has reported it's goal and according to it planned a research program for reactor control systems, preparation of pure uranium oxide from yellow cake, installation and operation of equipments for fuel pellet production. 4.The exploration centre exploited a geologic survey for the potential uranium ores and despite of difficulties and deficiences rich deposits are identifed. 5.The radiation protection centre research is allocated to a)Measuring the environmental radioactivity, b)dosimetry, c)inspection and controlling the radioactivity, of the medical and industrial centers 6.The renewable energy sources described their studies on solar energy and biogas application in Iran and finally attributes of International affiars, staff services, budget and adminis trative departments are outlined

  8. Atomic excitation and molecular dissociation by low energy electron collisions

    Energy Technology Data Exchange (ETDEWEB)

    Weyland, Marvin

    2016-11-16

    In this work, momentum imaging experiments have been conducted for the electron impact excitation of metastable states in noble gases and for dissociative electron attachment (DEA) in polyatomic molecules. For the electron impact excitation study a new experimental technique has been developed which is able to measure the scattering angle distribution of the electrons by detection of the momentum transfer to the atoms. Momentum transfer images have been recorded for helium and neon at fixed electron impact energy close to the excitation threshold and good agreement with current R-matrix theory calculations was found. A new momentum imaging apparatus for negative ions has been built for the purpose of studying DEA in biologically relevant molecules. During this work, DEA was investigated in the molecules ammonia, water, formic acid, furan, pyridine and in two chlorofluorocarbons. Furthermore, the change of DEA resonance energies when molecules form clusters compared to monomers was investigated in ammonia and formic acid. The experimental results of most studied molecules could be compared to recent theoretical calculations and they support further development in the theoretical description of DEA. The new apparatus built in this work also delivered a superior momentum resolution compared to existing setups. This allows the momentum imaging of heavier fragments and fragments with lower kinetic energy.

  9. Role of codeposited impurities during growth. II. Dependence of morphology on binding and barrier energies

    Science.gov (United States)

    Sathiyanarayanan, Rajesh; Hamouda, Ajmi Bh.; Pimpinelli, A.; Einstein, T. L.

    2011-01-01

    In an accompanying article we showed that surface morphologies obtained through codeposition of a small quantity (2%) of impurities with Cu during growth (step-flow mode, θ = 40 ML) significantly depends on the lateral nearest-neighbor binding energy (ENN) to Cu adatom and the diffusion barrier (Ed) of the impurity atom on Cu(0 0 1). Based on these two energy parameters, ENN and Ed, we classify impurity atoms into four sets. We study island nucleation and growth in the presence of codeposited impurities from different sets in the submonolayer (θ⩽ 0.7 ML) regime. Similar to growth in the step-flow mode, we find different nucleation and growth behavior for impurities from different sets. We characterize these differences through variations of the number of islands (Ni) and the average island size with coverage (θ). Further, we compute the critical nucleus size (i) for all of these cases from the distribution of capture-zone areas using the generalized Wigner distribution.

  10. Examination of employment in the atomic energy field

    International Nuclear Information System (INIS)

    Baker, J.G.

    1978-02-01

    This study, which focuses on the years 1968--1975, singles out important employment trends in the atomic energy field and develops causal explanations for these trends. The study also provides a descriptive profile of employment in the field. Employment in the atomic energy field has grown from 138,519 in 1963 to 197,466 in 1975, an annual rate of 3.0 percent. The deployment of scientists, engineers, and technicians in the government-owned, contractor-operated (GOCO) sector changed little from 1968 to 1975. Private sector deployment altered considerably, with a large increase. Within the scientist group, the GOCO sector employment by field has changed little from 1968 to 1975. Private sector scientists have seen considerable alteration of their employment. There has been little change in the employment shares of engineering fields in the GOCO sector for the 1968 to 1975 period. Private sector engineers have seen much greater change, with civil engineers increasing their share 6% to 11%. Of all GOCO technicians, physical science technicians have increased their employment share from 12% to 17%. Of all private sector technicians, draftsmen have increased their share from 29% to 37% and reactor operators from 4% to 7%. Total employment in the field is shifting toward smaller firms. Employment by region has changed considerably in the private sector from 1968 to 1975. GOCO regional employment has also changed. The percentage of scientists and engineers involved in research and development has declined from 68% in 1968 to 39% in 1975. Three private sector industrial segments--reactor design and manufacturing, nuclear facilities design and engineering, and operation and maintenance of reactors--have experienced tremendous growth from 1968 to 1975. 8 figures, 32 tables

  11. Energy landscape of all-atom protein-protein interactions revealed by multiscale enhanced sampling.

    Directory of Open Access Journals (Sweden)

    Kei Moritsugu

    2014-10-01

    Full Text Available Protein-protein interactions are regulated by a subtle balance of complicated atomic interactions and solvation at the interface. To understand such an elusive phenomenon, it is necessary to thoroughly survey the large configurational space from the stable complex structure to the dissociated states using the all-atom model in explicit solvent and to delineate the energy landscape of protein-protein interactions. In this study, we carried out a multiscale enhanced sampling (MSES simulation of the formation of a barnase-barstar complex, which is a protein complex characterized by an extraordinary tight and fast binding, to determine the energy landscape of atomistic protein-protein interactions. The MSES adopts a multicopy and multiscale scheme to enable for the enhanced sampling of the all-atom model of large proteins including explicit solvent. During the 100-ns MSES simulation of the barnase-barstar system, we observed the association-dissociation processes of the atomistic protein complex in solution several times, which contained not only the native complex structure but also fully non-native configurations. The sampled distributions suggest that a large variety of non-native states went downhill to the stable complex structure, like a fast folding on a funnel-like potential. This funnel landscape is attributed to dominant configurations in the early stage of the association process characterized by near-native orientations, which will accelerate the native inter-molecular interactions. These configurations are guided mostly by the shape complementarity between barnase and barstar, and lead to the fast formation of the final complex structure along the downhill energy landscape.

  12. Differential cross sections for inelastic scattering of electrons on Kr and Xe atoms at intermediate energies

    International Nuclear Information System (INIS)

    Filipovic, D.M.

    1989-01-01

    Electron-impact excitation of the larger- number noble-gas atoms is a way of understanding excitation mechanisms in atomic collisional processes. Krypton and xenon have the largest atomic number of all the stable noble gases. Therefore, effects dependent on the size of a target atom, such as alignment and orientation of the atomic outer shell charge cloud after collisional excitation, are best observed by studying these atoms. Normalized, absolute differential cross sections (DCS's) for the lowest electronic states of Kr and Xe atoms, at intermediate energies, are the subject of this report

  13. A study of beta decay energies and atomic masses

    International Nuclear Information System (INIS)

    Spanier, L.

    1988-04-01

    The q β energies of 123-131 In have been determined using the end points of β spectra recorded in β-γ coincidence experiments. A HPGe planar detector was used to detect the β-particles and a semi-empirical response function was used when unfolding the electron distribution. The mass excesses were deduced and when they were compared with the predictions of various mass formulae, the cadmium isotopes were found to be heavier than those predicted by most of the mass formulae. The excitation energy of the 1/2 - proton-hole state in the odd indium isotopes was shown to be constant for all the heavy isotopes. The Q EC energies of 148 Dy and 96 Pd were determined using the β + /EC intensity ratio method. The ratio of the intensity of the β+ branch to the total beta decay intensity was determined by means of γ-spectroscopic methods. The mass excesses were deduced. The two-proton binding energy for the N=82 isotones showed only a small step of approximately 0.5 MeV when the doubly-magic nucleus 146 Gd was encountered. A liquid drop type mass formula with deformation and shell energy corrections and with few free parameters is presented. The shell energy correction is a simple analytical expression for the equilibrium deformation of the nucleus. An analytical expression for the equilibrium nuclear deformation is also presented. The mass formula was applied to nuclei with Z and N greater than 50. The RMS deviation is 0.55 milli mass units. The reaction 98 Mo(p,n) 98 Tc was investigated through the counter ratio method, the ratio of the number of slow neutrons to the number of fast neutrons. The Q pn energy value of a low-spin state in 98 Tc was determined. The state at 90.9 keV excitation energy is proposed to be the 14.6 m u s isomer and have spin and parity 1 + . (author)

  14. The International Atomic Energy Agency (IAEA) standards and recommendations on radioactive waste and transport safety

    International Nuclear Information System (INIS)

    Warnecke, E.; Rawl, R.

    1996-01-01

    The International Atomic Energy Agency (IAEA) publishes standards and recommendations on all aspects of nuclear safety in its Safety Series, which includes radioactive waste management and transport of radioactive materials. Safety Series documents may be adopted by a State into its national legal framework. Most of the States used the IAEA transport regulations (Safety Series No. 6) as a basis for their national regulation. The two highest ranking documents of the Radioactive Waste Safety Standards (RADWASS) programme, the Safety Fundamentals and the Safety Standard on the national waste management system, have been published. Both provide impetus into the waste management safety convention, a legally binding document for signatory states, which is being drafted. The already existing Convention on Nuclear Safety covers the management of radioactive waste at land-based civil nuclear power plants. (author) 1 fig., 18 refs

  15. Inelastic collisions of atomic particles at mean energies. Pt.1. Qualitative model of energy losses during a collision

    International Nuclear Information System (INIS)

    Pustovit, A.N.

    2005-01-01

    A new approach is proposed for description of the energy losses of mean-energy atomic particles during their interactions with atomic particles of solids. It is shown that all these interactions are inelastic ones and are determined by different scattering zones with different laws of energy loss dependences [ru

  16. Energy dependence of the anisotropy of noncharacteristic x-rays emitted in fast ion-atom collisions

    International Nuclear Information System (INIS)

    Thoe, R.S.; Sellin, I.A.; Brown, M.D.; Forester, J.P.; Griffin, P.M.; Pegg, D.J.; Peterson, R.S.

    1974-01-01

    The effect of beam velocity and K-shell binding energy on the angular distributions of the noncharacteristic x-radiation emitted for various collision pairs. The results are in general agreement with the calculations of Mueller and Greiner, in that the anisotropy increases rapidly with energy, provided that the ions are still moving slowly, compared to the velocity of the K-shell electrons of the separated atoms. The anisotropy in some cases exceeds the maximum permitted by the Mueller--Greiner model for the zero alignment case, implying that strong alignment phenomena also occur

  17. Transport Gap and exciton binding energy determination in organic semiconductors

    Energy Technology Data Exchange (ETDEWEB)

    Krause, Stefan; Schoell, Achim; Reinert, Friedrich; Umbach, Eberhard [University of Wuerzburg (Germany). Experimental Physics II; Casu, Benedetta [Inst. f. Physik. u. Theor. Chemie, Tuebingen (Germany)

    2008-07-01

    The transport gap of an organic semiconductor is defined as the energy difference between the HOMO and LUMO levels in the presence of a hole or electron, respectively, after relaxation has occurred. Its knowledge is mandatory for the optimisation of electronic devices based on these materials. UV photoelectron spectroscopy (UPS) and inverse photoelectron spectroscopy (IPES) are routinely applied to measure these molecular levels. However, the precise determination of the transport gap on the basis of the respective data is not an easy task. It involves fundamental questions about the properties of organic molecules and their condensates, about their reaction on the experimental probe, and on the evaluation of the spectroscopic data. In particular electronic relaxation processes, which occur on the time scale of the photo excitation, have to be considered adequately. We determined the transport gap for the organic semiconductors PTCDA, Alq3, DIP, CuPc, and PBI-H4. After careful data analysis and comparison to the respective values for the optical gap we obtain values for the exciton binding energies between 0.1-0.5 eV. This is considerably smaller than commonly believed and indicates a significant delocalisation of the excitonic charge over various molecular units.

  18. On sulfur core level binding energies in thiol self-assembly and alternative adsorption sites: An experimental and theoretical study

    International Nuclear Information System (INIS)

    Jia, Juanjuan; Kara, Abdelkader; Pasquali, Luca; Bendounan, Azzedine; Sirotti, Fausto; Esaulov, Vladimir A.

    2015-01-01

    Characteristic core level binding energies (CLBEs) are regularly used to infer the modes of molecular adsorption: orientation, organization, and dissociation processes. Here, we focus on a largely debated situation regarding CLBEs in the case of chalcogen atom bearing molecules. For a thiol, this concerns the case when the CLBE of a thiolate sulfur at an adsorption site can be interpreted alternatively as due to atomic adsorption of a S atom, resulting from dissociation. Results of an investigation of the characteristics of thiol self-assembled monolayers (SAMs) obtained by vacuum evaporative adsorption are presented along with core level binding energy calculations. Thiol ended SAMs of 1,4-benzenedimethanethiol (BDMT) obtained by evaporation on Au display an unconventional CLBE structure at about 161.25 eV, which is close to a known CLBE of a S atom on Au. Adsorption and CLBE calculations for sulfur atoms and BDMT molecules are reported and allow delineating trends as a function of chemisorption on hollow, bridge, and atop sites and including the presence of adatoms. These calculations suggest that the 161.25 eV peak is due to an alternative adsorption site, which could be associated to an atop configuration. Therefore, this may be an alternative interpretation, different from the one involving the adsorption of atomic sulfur resulting from the dissociation process of the S–C bond. Calculated differences in S(2p) CLBEs for free BDMT molecules, SH group sulfur on top of the SAM, and disulfide are also reported to clarify possible errors in assignments

  19. On sulfur core level binding energies in thiol self-assembly and alternative adsorption sites: An experimental and theoretical study

    Energy Technology Data Exchange (ETDEWEB)

    Jia, Juanjuan [Institut des Sciences Moléculaires d’Orsay, Université-Paris Sud, 91405 Orsay (France); CNRS, UMR 8214, Institut des Sciences Moléculaires d’Orsay, Orsay ISMO, Bâtiment 351, Université Paris Sud, 91405 Orsay (France); Kara, Abdelkader, E-mail: abdelkader.kara@ucf.edu, E-mail: vladimir.esaulov@u-psud.fr [Department of Physics, University of Central Florida, Orlando, Florida 32816 (United States); Pasquali, Luca [Dipartimento di Ingegneria “E. Ferrari,” Università di Modena e Reggio Emilia, Via Vignolese 905, 41125 Modena (Italy); IOM-CNR, s.s. 14, Km. 163.5 in AREA Science Park, 34149 Basovizza, Trieste (Italy); Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006 (South Africa); Bendounan, Azzedine; Sirotti, Fausto [Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex (France); Esaulov, Vladimir A., E-mail: abdelkader.kara@ucf.edu, E-mail: vladimir.esaulov@u-psud.fr [Institut des Sciences Moléculaires d’Orsay, Université-Paris Sud, 91405 Orsay (France); CNRS, UMR 8214, Institut des Sciences Moléculaires d’Orsay, Orsay ISMO, Bâtiment 351, Université Paris Sud, 91405 Orsay (France); IOM-CNR, s.s. 14, Km. 163.5 in AREA Science Park, 34149 Basovizza, Trieste (Italy)

    2015-09-14

    Characteristic core level binding energies (CLBEs) are regularly used to infer the modes of molecular adsorption: orientation, organization, and dissociation processes. Here, we focus on a largely debated situation regarding CLBEs in the case of chalcogen atom bearing molecules. For a thiol, this concerns the case when the CLBE of a thiolate sulfur at an adsorption site can be interpreted alternatively as due to atomic adsorption of a S atom, resulting from dissociation. Results of an investigation of the characteristics of thiol self-assembled monolayers (SAMs) obtained by vacuum evaporative adsorption are presented along with core level binding energy calculations. Thiol ended SAMs of 1,4-benzenedimethanethiol (BDMT) obtained by evaporation on Au display an unconventional CLBE structure at about 161.25 eV, which is close to a known CLBE of a S atom on Au. Adsorption and CLBE calculations for sulfur atoms and BDMT molecules are reported and allow delineating trends as a function of chemisorption on hollow, bridge, and atop sites and including the presence of adatoms. These calculations suggest that the 161.25 eV peak is due to an alternative adsorption site, which could be associated to an atop configuration. Therefore, this may be an alternative interpretation, different from the one involving the adsorption of atomic sulfur resulting from the dissociation process of the S–C bond. Calculated differences in S(2p) CLBEs for free BDMT molecules, SH group sulfur on top of the SAM, and disulfide are also reported to clarify possible errors in assignments.

  20. Effect of isovector coupling channel on the macroscopic part of the nuclear binding energy

    International Nuclear Information System (INIS)

    Haddad, S.

    2011-04-01

    The effect of the isovector coupling channel on the macroscopic part of the nuclear binding energy is determined utilizing the relativistic density dependent Thomas-Fermi approach for the calculation of the macroscopic part of the nuclear binding energy, and the dependency of this effect on the numbers of neutrons and protons is studied. The isovector coupling channel leads to increased nuclear binding energy, and this effect sharpens with growing excess of the number of neutrons on the number of protons. (author)

  1. Protocol Additional to the agreement between France, the European Atomic Energy Community and the International Atomic Energy Agency for the application of safeguards in France

    International Nuclear Information System (INIS)

    2005-01-01

    The text of the Protocol Additional to the Agreement between France, the European Atomic Energy Community and the International Atomic Energy Agency for the Application of Safeguards in France is reproduced in the Annex to this document for the information of all Members. The Additional Protocol was approved by the Board of Governors on 11 June 1998. It was signed in Vienna on 22 September 1998. Pursuant to Article 16 of the Additional Protocol, the Protocol entered into force on 30 April 2004, the date on which the Agency received written notification that the European Atomic Energy Community and France had met their respective internal requirements for entry into force

  2. Two atoms scattering at low and cold energies

    Indian Academy of Sciences (India)

    A modified static-exchange model is developed to study the collision of an atom with another atom. It includes the effect of long-range dipole–dipole van der Waals interaction between two atoms in addition to the exact effect of short-range force due to Coulomb exchange between two system electrons. Both these ...

  3. Change of Energy of the Cubic Subnanocluster of Iron Under Influence of Interstitial and Substitutional Atoms.

    Science.gov (United States)

    Nedolya, Anatoliy V; Bondarenko, Natalya V

    2016-12-01

    Energy change of an iron face-centred cubic subnanocluster was evaluated using molecular mechanics method depending on the position of a carbon interstitial atom and substitutional atoms of nickel. Calculations of all possible positions of impurity atoms show that the energy change of the system are discrete and at certain positions of the atoms are close to continuous.In terms of energy, when all impurity atoms are on the same edge of an atomic cluster, their positions are more advantageous. The presence of nickel atoms on the edge of a cubic cluster resulted in decrease of potential barrier for a carbon atom and decrease in energy in the whole cluster. A similar drift of a carbon atom from central octahedral interstitial site to the surface in the direction occurred under the influence of surface factors.Such configuration corresponds to decreasing symmetry and increasing the number of possible energy states of a subnanocluster, and it corresponds to the condition of spontaneous crystallization process in an isolated system.Taking into account accidental positions of the nickel atom in the iron cluster, such behaviour of the carbon atom can explain the mechanism of growth of a new phase and formation of new clusters in the presence of other kind of atoms because of surface influence.

  4. Hamaoka Atomic Energy Hall, Chubu Electric Power Co. , Inc

    Energy Technology Data Exchange (ETDEWEB)

    Kawasaki, Y [Chubu Electric Power Co. Inc., Nagoya (Japan)

    1979-10-01

    Hamaoka Nuclear Power Station was constructed in the very large site of about 1.6 million m/sup 2/ surrounded by sand dunes and pine forests at the southern tip of Shizuoka Prefecture. Hamaoka Atomic Energy Hall was built on the right side of this power station. This hall had been planned as a part of the works commemorating the 20th anniversary of the founding of the company, and was opened in August, 1972. The building is of steel frame type, and has two floors of 1135 m/sup 2/ total area. The first floor comprises cinema room, power generation corner and open gallery, and the second floor comprises meeting room, native land corner and observation room. Moreover, there is observation platform on the roof. The purpose of the hall is coexistence and coprosperity with the regional residents, and 13 persons make explanations to visitors having reached to 1.9 million as of the end of June, 1979. It is incorporated in the sightseeing route centering around the Omaezaki lighthouse. The cinema hall accommodates 120 men, and the films concerning nuclear power generation and the construction of a nuclear power plant are shown. In the power generation corner, the explanation on nuclear power generation is made with models and panels. The third hall is being built now as energy corner, and it will be completed in autumn, 1979.

  5. Hamaoka Atomic Energy Hall, Chubu Electric Power Co., Inc

    International Nuclear Information System (INIS)

    Kawasaki, Yukio

    1979-01-01

    Hamaoka Nuclear Power Station was constructed in the very large site of about 1.6 million m 2 surrounded by sand dunes and pine forests at the southern tip of Shizuoka Prefecture. Hamaoka Atomic Energy Hall was built on the right side of this power station. This hall had been planned as a part of the works commemorating the 20th anniversary of the founding of the company, and was opened in August, 1972. The building is of steel frame type, and has two floors of 1135 m 2 total area. The first floor comprises cinema room, power generation corner and open gallery, and the second floor comprises meeting room, native land corner and observation room. Moreover, there is observation platform on the roof. The purpose of the hall is coexistence and coprosperity with the regional residents, and 13 persons make explanations to visitors having reached to 1.9 million as of the end of June, 1979. It is incorporated in the sightseeing route centering around the Omaezaki lighthouse. The cinema hall accommodates 120 men, and the films concerning nuclear power generation and the construction of a nuclear power plant are shown. In the power generation corner, the explanation on nuclear power generation is made with models and panels. The third hall is being built now as energy corner, and it will be completed in autumn, 1979. (Kako, I.)

  6. Tree planting in deserts and utilization of atomic energy

    International Nuclear Information System (INIS)

    Hattori, Sadao; Minato, Akio; Hashizume, Kenichi; Handa, Norihiko.

    1991-01-01

    Global environment problems are discussed actively, concretely, those are the warming of the earth, the advance of desertification, the damage due to acid rain, the decrease of tropical forests, the pollution of sea, the depletion of ozone layer and so on. Most of these phenomena advance gradually. However, the advance of desertification is different from other phenomena in that the people in the areas concerned are deprived of their living space and even their lives are threatened at this moment. Desertification is advancing on global scale, and its rate is estimated to be 60,000 km 2 yearly. Especially the area where the advance is remarkable is the southern edge of Sahara Desert, which advances southward at 10-30 km in one year. Recently also in Japan, the interest in the prevention of desertification has become high, and the experiment on tree planting in a desert using a huge desert dome of the Institute of Physical and Chemical Research, 'Desert Aquanet concept' of Shimizu Construction Co., Ltd., 'Sahara green belt project' of the Ministry of International Trade and Industry and so on were published. Water and energy for tree planting in deserts, utilization of atomic energy for seawater desalination and the technical fields to which Japan can contribute are reported. (K.I.)

  7. Japan Atomic Energy Research Institute in the 21st century

    International Nuclear Information System (INIS)

    Sato, Y.

    2001-01-01

    Major nuclear research institutes in Japan are the Japan Atomic Energy Research Institute (JAERI), Nuclear Cycle Development Institute (JNC), National Research Institute of Radiological Science (NIRS), and the Institute of Physical and Chemical Research (RIKEN). In the 50s and 60s JAERI concentrated on the introduction of nuclear technology from overseas. Energy security issues led to the development of a strong nuclear power programme in the next two decades resulting in Japan having 50 light water cooled nuclear power plants in operation. Japan also worked on other reactor concepts. The current emphasis of JAERI is on advanced reactors and nuclear fusion. Its budget of 270 million US$ supports five research establishments. JAERI has strong collaboration with industry and university system on nuclear and other advanced research topics (neutron science, photon science). In many areas Japan has strong international links. JAERI has also been transferring know-how on radioisotope and radiation applications to the developing countries particularly through IAEA-RCA mechanisms. (author)

  8. Tree planting in deserts and utilization of atomic energy

    Energy Technology Data Exchange (ETDEWEB)

    Hattori, Sadao; Minato, Akio [Central Research Inst. of Electric Power Industry, Tokyo (Japan); Hashizume, Kenichi; Handa, Norihiko

    1991-06-01

    Global environment problems are discussed actively, concretely, those are the warming of the earth, the advance of desertification, the damage due to acid rain, the decrease of tropical forests, the pollution of sea, the depletion of ozone layer and so on. Most of these phenomena advance gradually. However, the advance of desertification is different from other phenomena in that the people in the areas concerned are deprived of their living space and even their lives are threatened at this moment. Desertification is advancing on global scale, and its rate is estimated to be 60,000 km{sup 2} yearly. Especially the area where the advance is remarkable is the southern edge of Sahara Desert, which advances southward at 10-30 km in one year. Recently also in Japan, the interest in the prevention of desertification has become high, and the experiment on tree planting in a desert using a huge desert dome of the Institute of Physical and Chemical Research, 'Desert Aquanet concept' of Shimizu Construction Co., Ltd., 'Sahara green belt project' of the Ministry of International Trade and Industry and so on were published. Water and energy for tree planting in deserts, utilization of atomic energy for seawater desalination and the technical fields to which Japan can contribute are reported. (K.I.).

  9. Various issues associated with laws concerning atomic energy in Japan

    International Nuclear Information System (INIS)

    Ishibashi, Tadao.

    1989-01-01

    It the report, the legislation and policymaking systems, particularly for high-level radioactive wastes, in Japan and the U.S. are compared. Major legislation that reflects the policies for atomic energy in the U.S. includes: National Environmental Policy Act (1960, Nixon Administration), Low-Level Radioactive Waste Policy Act (1980, Carter Administration), Reagan's statement in October 1981, Nuclear Waste Policy Act (1982, Reagan Administration), 1986 Revision of Low-Level Radioactive Waste Policy Act, and 1987 Revision of Nuclear Waste Policy Act. According to the basic concept specified in the revised Nuclear Waste Policy Act, the Department of Energy is required to establish the 'Mission Plan'. The 1988 Mission Plan describes details of the wastes, MRS and repository as covered by the above-mentioned basic concept. The 1982 Nuclear Waste Policy Act and its 1987 revision focus procedures for policymaking concerning the treatment and disposal of wastes. In particular, the Act specifies the time sequence of the processes down to the waste disposal together with material-related processes including the material selection at the disposal site, and also clarifies the rights and obligations of the persons and organizations having the legal responsibility. (N.K.)

  10. A study on the improvement of the legal system concerning Korean Atomic Energy Act

    Energy Technology Data Exchange (ETDEWEB)

    Yoo, Il Un; Jung, Jong Hak; Kim, Jae Ho; Moon, Jong Wook; Kim, In Sub [Chungnam National Univ., Taejon (Korea, Republic of)

    1998-03-15

    Cause-effect analysis, adjustment, and generalization of the current atomic energy act are contents of this research. These are to be based on the legal theory. Analysis of the current atomic energy act from the viewpoint of constitutional law and administrative law. Review of the other domestic legal systems which have similar problems as the atomic energy act has. Inquiry about the operation of nuclear legal systems of foreign nations.

  11. A study on the improvement of the legal system concerning Korean Atomic Energy Act

    International Nuclear Information System (INIS)

    Yoo, Il Un; Jung, Jong Hak; Kim, Jae Ho; Moon, Jong Wook; Kim, In Sub

    1998-03-01

    Cause-effect analysis, adjustment, and generalization of the current atomic energy act are contents of this research. These are to be based on the legal theory. Analysis of the current atomic energy act from the viewpoint of constitutional law and administrative law. Review of the other domestic legal systems which have similar problems as the atomic energy act has. Inquiry about the operation of nuclear legal systems of foreign nations

  12. The new protection level of the atomic energy law; Das neue Schutzniveau des Atomgesetzes

    Energy Technology Data Exchange (ETDEWEB)

    Ziehm, Cornelia [Deutsche Umwelthilfe e.V. (DUH), Berlin (Germany). Klimaschutz und Energiewende

    2011-07-01

    The atomic energy law is determining the normative basis for best possible danger prevention and hazard control in accordance with the actual state-of-the art of science and technology. This is not only essential for the legal licensing procedures but also for atomic energy authorities. With the introduction of paragraph 7d into the German atomic energy law in the frame of revision 12 essential protection requirements and retrofitting measures will be withdrawn from the danger prevention in the sense of the atomic energy law and thus the third party protection.

  13. Atomic Energy Act and Related Legislation. Environmental Guidance Program Reference Book: Revision 6

    Energy Technology Data Exchange (ETDEWEB)

    1992-09-01

    This report presents information related to the Atomic Energy Act and related legislation. Sections are presented pertaining to legislative history and statutes, implementing regulations, and updates.

  14. Report on the atom what you should know about atomic energy

    CERN Document Server

    Dean, Gordon

    1954-01-01

    The American approach to the atom ; Uranium is where you find it ; the production line: ore to bombs ; the expanding programme ; the headaches ; the pay-off: weapons ; the military and the atoms ; power: the peaceful goals, first phase ; power: the peaceful goals, second goals ; radioisotopes: servants of man ; the quest for knowledge ; secrecy, security and spies ; the international atom ; behind the Iron Curtain ; the way ahead.

  15. Index to the United States Atomic Energy Commission's Annual Report to Congress for 1960. Major activities in the atomic energy programs, January 1960 - December 1960

    Energy Technology Data Exchange (ETDEWEB)

    McCone, John A.

    1961-01-31

    This volume contains a name and subject index for the 1960 report of the United States Atomic Energy Commission to Congress. The full semiannual report covers the major unclassified activities of the Commission from January through December 1960.

  16. Index to the United States Atomic Energy Commission's Annual Report to Congress for 1962. Major activities in the atomic energy programs, January 1962 - December 1962

    Energy Technology Data Exchange (ETDEWEB)

    Seaborg, Glenn T.

    1963-01-31

    This volume contains a name and subject index for the 1962 report of the United States Atomic Energy Commission to Congress. The full semiannual report covers the major unclassified activities of the Commission from January through December 1962.

  17. Index to the United States Atomic Energy Commission's Annual Report to Congress for 1959. Major activities in the atomic energy programs, January 1959 - December 1959

    Energy Technology Data Exchange (ETDEWEB)

    McCone, John A.

    1960-01-31

    This volume contains a name and subject index for the 1959 report of the United States Atomic Energy Commission to Congress. The full semiannual report covers the major unclassified activities of the Commission from January through December 1959.

  18. Semiphenomenological studies of the ground state binding energies of hypernuclei

    International Nuclear Information System (INIS)

    Mian, M.

    1987-01-01

    We show that the binding energies of /sub Λ/ 5 He and p-shell hypernuclei can be satisfactorily explained in the folding model approach using a density dependent effective ΛN interaction. Our analysis predicts a very reasonable value of the range of the ΛN interaction. The calculated value of B/sub Λ/ of /sub Λ/ 7 Li using the cluster model density for 6 Li and the best fit parameters of this potential supports the view that 6 Li possesses an α-d cluster structure. Using this potential we also determine the average size parameter (a 0 ) of the oscillator shell model density of nucleons in Nnot =Z core nuclei from fitting the B/sub Λ/ values of the corresponding hypernuclei. The effect of different forms of density distribution of core nuclei on the values of potential parameters is investigated and is found to be very small. As regards the form of density dependence, a rho/sup 2/3/ form is found to be the most appropriate for this purpose and is used throughout this work. Other forms do not give a satisfactory account of the data

  19. Atomic energy law after the opt-out. Alive and fascinating. Report about the 14th German atomic energy law symposium 2012

    International Nuclear Information System (INIS)

    Leidinger, Tobias

    2013-01-01

    Atomic energy law remains a living, fascinating subject matter. Nearly 200 participants were convinced of this impression at the 14 th German Atomic Energy Law Symposium held in Berlin on November 19-20, 2012. Under the scientific chairmanship of Professor Dr. Martin Burgi, Ludwig Maximilian University of Munich, the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU), after an interruption of 5 years, again organized a scientific conference about practice-related topics of atomic energy and radiation protection law. Atomic energy law once again proved to be a reference area for sophisticated issues of constitutional law and administrative law above and beyond its technical confines. The agenda of the 14 th German Atomic Energy Law Symposium featured a broad spectrum of topics ranging from backfitting of nuclear power plants to European atomic energy and radiation protection law, to challenges facing national legal systems in the execution of atomic energy law, to legal issues connected with decommissioning and waste management, and on to the topical subject of finding a repository site. The 14 th German Atomic Energy Law Symposium, on the whole, again demonstrated that an open discourse between science and practice is able to furnish important contributions to the implementation of laws in a balanced way rooted in practice. Especially the contributions dealing with the independence of public authorities and their organization, the doctrine of the reservation of functions of the executive branch, and planning by laws contain additional provisions able to influence the continued development of administrative law also above and beyond atomic energy law. The BMU also referred to a decision just heard from Brussels to the effect that a new European Safety Directive would be published as early as in 2013. As a consequence of the nuclear stress tests conducted EU-wide, the Directive is to lay down provisions about transparency

  20. Bibliography on atomic energy levels and spectra. Special pub., Jul 1971--Jun 1975

    International Nuclear Information System (INIS)

    Hagan, L.

    1977-01-01

    This is the first supplement to the NBS Special Publication 363, 'Bibliography on Atomic Energy Levels and Spectra, July 1968 through June 1971,' and it covers the most recent literature from July 1971 through June 1975. It contains approximately 2150 references classified by subject for individual atoms and atomic ions. A number index identifies the references. An author index is included. References included contain data on energy levels, classified lines, wavelengths, Zeeman effect, Stark effect, hyperfine structure, isotope shift, ionization potentials, or theory which gives results for specific atoms or atomic ions