Filters
Results 1 - 10 of 37037
Results 1 - 10 of 37037.
Search took: 0.052 seconds
Sort by: date | relevance |
Helene, M.E.M.
Sao Paulo Univ., SP (Brazil). Inst. de Fisica1988
Sao Paulo Univ., SP (Brazil). Inst. de Fisica1988
AbstractAbstract
[en] Short communication
Original Title
Reserva brasileira de torio processado a partir da areia monazitica
Primary Subject
Source
1988; 3 p; 1. Teachers and Searchers Meeting of Sao Paulo University (USP) on Environment; Sao Paulo, SP (Brazil); 1988
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
ACTINIDE COMPOUNDS, ACTINIDES, CHALCOGENIDES, DEVELOPING COUNTRIES, ELEMENTS, LATIN AMERICA, MATERIALS, METALS, MINERALS, NITRATES, NITROGEN COMPOUNDS, ORES, OXIDES, OXYGEN COMPOUNDS, PHOSPHATE MINERALS, RADIOACTIVE MATERIALS, RADIOACTIVE MINERALS, RESERVES, RESOURCES, SOUTH AMERICA, SULFATES, SULFUR COMPOUNDS, THORIUM COMPOUNDS, THORIUM MINERALS
LanguageLanguage
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Amazal, N.; Cocks, J.F.C.; Butler, P.A.; Cann, K.J.; Greenlees, P.T.; Jones, G.D.; Asztalos, S.; Clark, R.M.; Deleplanque, M.A.; Diamond, R.M.; Fallon, P.; Lee, I.Y.; Macchiavelli, A.O.; MacLeod, R.W.; Stephens, F.S.; Jones, P.M.; Julin, R.; Broda, R.; Fornal, B.; Smith, J.F.; Lauritsen, T.; Bhattacharyya, P.; Zhang, C.T.
Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science (United States)1998
Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science (United States)1998
AbstractAbstract
No abstract available
Primary Subject
Source
16 Nov 1998; [10 p.]; LBNL--46374; AC03-76SF00098; Also available from Lawrence Berkeley National Lab., CA (United States); Published in Journal of Physics G-Nuclear and Particle Physics, v. 25(4)
Record Type
Miscellaneous
Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DAYS LIVING RADIOISOTOPES, DIRECT REACTIONS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, HEAVY ION DECAY RADIOISOTOPES, HEAVY NUCLEI, HOURS LIVING RADIOISOTOPES, INTERNAL CONVERSION RADIOISOTOPES, ISOTOPES, MINUTES LIVING RADIOISOTOPES, NEON 24 DECAY RADIOISOTOPES, NUCLEAR REACTIONS, NUCLEI, RADIOISOTOPES, SPONTANEOUS FISSION RADIOISOTOPES, THORIUM ISOTOPES, TRANSFER REACTIONS, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The expression for polarized electric dipole moment of well-deformed reflection asymmetric nuclei is obtained in the framework of the liquid-drop model in the case of geometrically similar proton and neutron surfaces. The expression for polarized electric dipole moment consists of the first- and second-order terms. It is shown that the second-order correction terms of the polarized electric dipole moment are important for well-deformed nuclei. (orig.)
Primary Subject
Source
Available from: http://dx.doi.org/10.1140/epja/i2011-11080-9
Record Type
Journal Article
Literature Type
Numerical Data
Journal
European Physical Journal. A; ISSN 1434-6001;
; v. 47(6); 9 p

Country of publication
ASYMMETRY, CORRECTIONS, DEFORMED NUCLEI, ELECTRIC DIPOLE MOMENTS, LIQUID DROP MODEL, NUCLEAR DEFORMATION, NUCLEAR ELECTRIC MOMENTS, P INVARIANCE, SYMMETRY BREAKING, THEORETICAL DATA, THORIUM 220, THORIUM 221, THORIUM 222, THORIUM 223, THORIUM 224, THORIUM 225, THORIUM 226, THORIUM 227, THORIUM 228, THORIUM 229, THORIUM 230, THORIUM 231
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DATA, DAYS LIVING RADIOISOTOPES, DEFORMATION, DIPOLE MOMENTS, ELECTRIC MOMENTS, ELECTRON CAPTURE RADIOISOTOPES, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, HEAVY ION DECAY RADIOISOTOPES, HEAVY NUCLEI, INFORMATION, INVARIANCE PRINCIPLES, ISOTOPES, MATHEMATICAL MODELS, MICROSECONDS LIVING RADIOISOTOPES, MILLISECONDS LIVING RADIOISOTOPES, MINUTES LIVING RADIOISOTOPES, NEON 24 DECAY RADIOISOTOPES, NUCLEAR MODELS, NUCLEAR PROPERTIES, NUCLEI, NUMERICAL DATA, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SPONTANEOUS FISSION RADIOISOTOPES, THORIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Reactors fuels based on thorium or its compounds are important for fuel economy in advanced converters and breeders. The development of such fuels requires considerable physical, mechanical, and other data on potential materials. Our purpose was to survey the literature on these materials, report selected data, and indicate the areas where further data are needed. 63 refs, 2 figs, 10 tabs
Primary Subject
Source
International Atomic Energy Agency, Vienna (Austria); Technical reports series; No. 52; 376 p; Apr 1966; p. 292-312; IAEA; Vienna (Austria); Panel on utilization of thorium in power reactors; Vienna (Austria); 14-18 Jun 1965
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Published in summary form only
Primary Subject
Source
Spring meeting of the Fachausschuss Kern- und Mittelenergiephysik of the Deutsche Physikalische Gesellschaft e.V; Fruehjahrstagung des Fachausschusses Kern- und Mittelenergiephysik der Deutschen Physikalischen Gesellschaft e.V; Berlin (Germany, F.R.); 21-25 Mar 1988
Record Type
Journal Article
Literature Type
Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; CODEN VDPEA; v. 23(6); p. G7.7

Country of publication
ACTINIDE NUCLEI, ACTINIDES, ALPHA DECAY RADIOISOTOPES, ATOMIC IONS, CHARGED PARTICLES, DAYS LIVING RADIOISOTOPES, ELECTRIC MOMENTS, ELEMENTS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, HEAVY NUCLEI, IONS, ISOTOPES, MAGNETIC MOMENTS, METALS, NUCLEAR PROPERTIES, NUCLEI, RADIOISOTOPES, SPECTROSCOPY, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Dellinger, F.; Forstner, O.; Golser, R.; Kutschera, W.; Priller, A.; Steier, P.; Wallner, A.; Winkler, G., E-mail: franz.dellinger@univie.ac.at2010
AbstractAbstract
[en] In the search for long-lived superheavy elements (SHEs) in nature the claim for the detection of a SHE species with A = 292 in a commercially available thorium solution at an abundance of (1-10) x 10-12 relative to 232Th using ICP-SFMS has been raised very recently by Marinov et al. The same group also claimed the finding of four long-lived isomeric states in neutron-deficient thorium isotopes at an abundance of (1-10) x 10-11 relative to 232Th using the same experimental method. The aim of our study was to examine, whether the ratios mentioned above could also be found in a natural thorium mineral, using AMS as a much more sensitive technique assuring the complete suppression of molecular background. Chemically untreated thorianite (ThO2) was used for both measurements. In addition, commercial thorium(IV) oxide (thoria) powder was also analyzed in the SHE measurements. No events were observed in the A = 292 SHE search, resulting in an upper limit of 4 x 10-15 for the abundance of such a species relative to 232Th. For two neutron-deficient thorium isotopes, 211Th and 218Th, we find upper limits of 5 x 10-15. For 213Th and 217Th we observed a few events - albeit uncertain - which would put their abundance also into the 10-15 range.
Primary Subject
Source
11. international conference on accelerator mass spectrometry; Rome (Italy); 14-19 Sep 2008; S0168-583X(09)01203-8; Available from http://dx.doi.org/10.1016/j.nimb.2009.10.154; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms; ISSN 0168-583X;
; CODEN NIMBEU; v. 268(7-8); p. 1287-1290

Country of publication
ACTINIDE COMPOUNDS, ACTINIDE NUCLEI, ACTINIDES, ALPHA DECAY RADIOISOTOPES, BARYONS, CHALCOGENIDES, DISPERSIONS, ELEMENT 116 ISOTOPES, ELEMENTARY PARTICLES, ELEMENTS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, FERMIONS, HADRONS, HEAVY NUCLEI, HOMOGENEOUS MIXTURES, ISOTOPES, MATERIALS, METALS, MICROSECONDS LIVING RADIOISOTOPES, MILLISECONDS LIVING RADIOISOTOPES, MINERALS, MIXTURES, NANOSECONDS LIVING RADIOISOTOPES, NUCLEI, NUCLEONS, OXIDE MINERALS, OXIDES, OXYGEN COMPOUNDS, RADIOACTIVE MATERIALS, RADIOACTIVE MINERALS, RADIOISOTOPES, SPECTROSCOPY, SPONTANEOUS FISSION RADIOISOTOPES, THORIUM COMPOUNDS, THORIUM ISOTOPES, THORIUM MINERALS, TRANSPLUTONIUM ELEMENTS, TRANSURANIUM ELEMENTS, URANIUM MINERALS, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The present state in usage of thorium as a material for nuclear fuel conversion is considered. Some nuclearphysical characteristics of the thorium cycle are given. A general evaluation of perspective usage of thorium in nuclear power engineering is given. Possibilities and methods of thorium fuel production and regeneration are discussed, as well as the basic trends in investigations on developing the thorium cycle
Original Title
Sovremennoe sostoyanie i perspektivy ispol'zovaniya toriya v yadernoj ehnergetike
Primary Subject
Source
For English translation see the journal Soviet Radiochemistry (USA).
Record Type
Journal Article
Journal
Radiokhimiya; ISSN 0033-8311;
; v. 22(2); p. 177-193

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The elastic constants (C11 , C12 , and C44) of all the known cubic binary phases of thorium with nonmetals, ThX (X = C, N, O, P, As, Sb, S, Se), have been calculated using the full-potential linearized augmented plane wave (FLAPW) method with an exchange-correlation potential in the generalized gradient approximation (GGA). Numerical estimates of elastic parameters of the corresponding polycrystalline ceramics (bulk compression modulus, shear modulus, Young modulus, Poisson ratio, and Lame coefficients) are obtained and analyzed for the first time
[ru]
Полнопотенциальным методом присоединенных плоских волн с обменно-корреляционным потенциалом в приближении обобщенной градиентной аппроксимации проведены расчеты упругих констант (С11, С12 и С44) всех известных кубических бинарных фаз тория с неметаллами ThX (X =C, N, O, P, As, S, Se). Впервые выполнены численные оценки и дан анализ упругих параметров соответствующих поликристаллических керамик: модулей объемного сжатия, сдвига, Юнга, отношения Пуассона и коэффициентов ЛамэOriginal Title
Uprugie svojstva torievykh keramik ThX (X = C, N, O, P, As, Sb, S, Se)
Primary Subject
Secondary Subject
Source
12 refs., 2 figs., 2 tabs.
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Country of publication
ACTINIDE COMPOUNDS, ANTIMONY COMPOUNDS, APPROXIMATIONS, ARSENIC COMPOUNDS, ARSENIDES, CALCULATION METHODS, CARBIDES, CARBON COMPOUNDS, CHALCOGENIDES, CRYSTAL LATTICES, CRYSTAL STRUCTURE, CRYSTALS, DATA, DIMENSIONLESS NUMBERS, INFORMATION, MECHANICAL PROPERTIES, NITRIDES, NITROGEN COMPOUNDS, NUMERICAL DATA, OXIDES, OXYGEN COMPOUNDS, PHOSPHIDES, PHOSPHORUS COMPOUNDS, PNICTIDES, SELENIDES, SELENIUM COMPOUNDS, SULFIDES, SULFUR COMPOUNDS, THORIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The band structure of metallic Th and NaCl-type ThX (X=C, N, P, S) compounds were calculated by tight-binding method, with the parametrization improvement. Values of two-center parameters chosen so as to fit the result for Th given by Gupta and Loucks were found to be very close to two-center integrals with a suitable integration range. Applying this method for evaluating parameters, the band structures for ThX compounds were also computed. Population analysis to determine the electron populations in each orbital based on the results obtained by the method indicated that for all compounds calculated the occupied states consist mainly of sigma type bonding between metalloid p and Th d sub(γ) as well as π bonding between p and Th dsub(epsilon). (auth.)
Primary Subject
Record Type
Journal Article
Journal
Journal of Nuclear Science and Technology (Tokyo); v. 12(11); p. 711-716
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Lainetti, Paulo E.O.; Mindrisz, Ana C.; Freitas, Antonio A., E-mail: lainetti@ipen.br, E-mail: acmindri@ipen.br, E-mail: afreitas@ipen.br
Associacao Brasileira de Energia Nuclear, Rio de Janeiro, RJ (Brazil)2011
Associacao Brasileira de Energia Nuclear, Rio de Janeiro, RJ (Brazil)2011
AbstractAbstract
[en] Globally, the 80's and 90's years were characterized by a significant reduction in the rate of growth of nuclear energy. However, from the 2000's, there has been a significant change in the international arena, with the 'renaissance' of interest in nuclear energy, even in countries that had abandoned nuclear power. To answer questions like security, reducing the generation of radioactive waste, control of proliferation risks and long-term sustainability, some initiatives have been adopted by some countries. In 2000, the Department of Energy - DOE - United States created the GIF - Generation IV International Forum for Nuclear Reactors. Six reactor concepts were selected based on criteria such as: reduction of radioactive wastes, safety and cost effective to meet the increasing energy demand on a sustainable basis, being resistant to diversion of materials for nuclear weapons proliferation and safer against terrorist attacks. In this context, it becomes important to use thorium as nuclear fuel for the Generation IV Advanced Reactors, with startup scheduled for 2030. Although the thorium does not present significant commercial value nowadays, in a not too distant future it will probably be an important commodity. Unfortunately, contrarily to what is happening in most developed countries in recent years, Brazil is paying little attention to the thorium, even less than in the past, despite its large reserves. Thorium is three to four times more abundant than uranium in the Earth's crust and, although not fissile, all thorium can be used to produce 233U, by absorption of neutrons and subsequent radioactive decay. This uranium isotope is an excellent fuel for use in almost all types of nuclear reactors. It is possible that the thorium constitutes the largest Brazilian energy reserve, supplanting much oil (despite the findings of the pre-salt) and uranium. Brazil has a long tradition in the thorium technology, from mining of monazite until the obtainment of high purity thorium compounds and IPEN accumulated since the 60's a wide experience in the purification of thorium, obtained primarily from the monazite processing. Studies were also conducted on obtaining nuclear fuel based on thorium, the reduction of ThF4 to metallic thorium, neutronic studies and proposition of reactor concepts based on the element. It should also be recorded that there was at IPEN, during this period, the production in pilot scale of over one hundred and seventy metric tons of thorium nitrate with high purity. In this paper, we present briefly the experience accumulated at IPEN-CNEN/SP-Brazil and the different areas that comprise the Thorium Fuel Cycle, and the possibilities and advantages of thorium use in the IV Generation Advanced Reactors. (author)
Primary Subject
Source
2011; 11 p; INAC 2011: International nuclear atlantic conference. Nuclear energy: new jobs for a better life; Belo Horizonte, MG (Brazil); 24-28 Oct 2011; 17. ENFIR: Meeting on nuclear reactor physics and thermal hydraulics; Belo Horizonte, MG (Brazil); 24-28 Oct 2011; 10. ENAN: Meeting on nuclear applications; Belo Horizonte, MG (Brazil); 24-28 Oct 2011; 2. ENIN: Meeting on nuclear industry; Belo Horizonte, MG (Brazil); 24-28 Oct 2011
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
ACTINIDE COMPOUNDS, ACTINIDE NUCLEI, ACTINIDES, ALPHA DECAY RADIOISOTOPES, ELEMENTS, ENERGY SOURCES, ENRICHED URANIUM REACTORS, EVEN-ODD NUCLEI, EXPERIMENTAL REACTORS, FLUORIDES, FLUORINE COMPOUNDS, FUEL CYCLE, FUELS, HALIDES, HALOGEN COMPOUNDS, HEAVY ION DECAY RADIOISOTOPES, HEAVY NUCLEI, ISOTOPES, MANAGEMENT, MATERIALS, METALS, MINERALS, NEON 24 DECAY RADIOISOTOPES, NITRATES, NITROGEN COMPOUNDS, NUCLEAR MATERIALS MANAGEMENT, NUCLEI, OXYGEN COMPOUNDS, POOL TYPE REACTORS, RADIOACTIVE MATERIALS, RADIOACTIVE MINERALS, RADIOISOTOPES, REACTOR MATERIALS, REACTORS, RESEARCH AND TEST REACTORS, SPONTANEOUS FISSION RADIOISOTOPES, THERMAL REACTORS, THORIUM COMPOUNDS, URANIUM ISOTOPES, WATER COOLED REACTORS, WATER MODERATED REACTORS, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |