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AbstractAbstract
No abstract available
Original Title
Recherche des rayons γ de pre-fission
Primary Subject
Source
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Dept. de Physique Nucleaire; p. 242-243; nd
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Report
Literature Type
Progress Report
Report Number
Country of publication
ALPHA DECAY RADIOISOTOPES, BARYON REACTIONS, BARYONS, ELEMENTARY PARTICLES, ENERGY, EVEN-ODD NUCLEI, FERMIONS, HADRON REACTIONS, HADRONS, HEAVY NUCLEI, ISOTOPES, NEUTRONS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, PLUTONIUM ISOTOPES, POTENTIAL ENERGY, RADIOISOTOPES, TARGETS, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
[en] A very high efficiency liquid-liquid chromatography (LLC) system based on 5- and 20-μm diameter porous silica microspheres was used to effect radiochemical separations of metal ions that required very large decontamination factors and/or high speeds. The stationary phase was 25-30% (w/w) of di(2-ethylhexyl) orthophosphoric acid (HDEHP) in dodecane. Nitric acid was used as the mobile phase. The mass transfer coefficient term, C, was determined from height equivalent to a theoretical plate vs. interstitial linear velocity data for the elution of Ca2+ and compared with values calculated from the interfacial mass transfer coefficients measured in the corresponding liquid-liquid extraction system. The HDEHP high-efficiency LLC system was also investigated for possible use in enriching the naturally occurring isotopes of calcium. Isotopic exchange constants for 40Ca or 42Ca and 48Ca were measured chromatographically as a function of temperature. The enrichment of calcium isotopes was attempted on coupled columns at low flow velocities
Record Type
Journal Article
Journal
Journal of Chromatography; v. 125(1); p. 203-218
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AbstractAbstract
No abstract available
Original Title
140, 265, 964 keV
Primary Subject
Source
American Nuclear Society 1975 winter meeting; San Francisco, CA, USA; 16 Nov 1975; Published in Summary Form Only.
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Journal Article
Literature Type
Conference
Journal
Transactions of the American Nuclear Society; v. 22 p. 663-664
Country of publication
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INIS VolumeINIS Volume
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AbstractAbstract
[en] An active target has been developed for study of the Hoyle like states in 16O. It is a position and time sensitive detector system based on the low-pressure MWPC technique and Si detectors. The few Torr pressure of methylal ((OCH3)2CH2) serves as a working gas for the MWPC operation, and in addition the oxygen atoms of the methylal molecules serve as an experimental target. The main advantage of this new target-detector system is a high sensitivity to the low-energy, highly ionizing particles, produced after photodisintegration of 16O, and insensitivity to γ-rays and minimum ionizing particles, thus allowing to detect only the products of the nuclear reaction of interest. The threshold energy for detection of α particles and 2C nuclei are about 50 keV and 100 keV, respectively. Timing and position resolution of lowpressure MWPC modules was investigated using an α-particle source. This paper discusses the architecture of the active target and test results of the prototype MWPC detector. This has been constructed to study cluster states at 15.1 MeV in 16O using proton beams from the Yerevan proton cyclotron and laser Compton backscattered photon beams at the ELI-NP facility
Original Title
Aktivnaya mishen' dlya issledovanij α-chastits kondensatov v 16O
Primary Subject
Source
Available from National Academy of Sciences of Armenia, also available online from: http://physics.asj-oa.am/id/eprint/3741
Record Type
Journal Article
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613;
; v. 54(2); p. 160-171

Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, CHARGED PARTICLES, ELEMENTS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, HEAVY NUCLEI, ION SOURCES, IONIZING RADIATIONS, ISOTOPES, LIGHT NUCLEI, MEASURING INSTRUMENTS, NUCLEI, OXYGEN ISOTOPES, PARTICLE SOURCES, PLUTONIUM ISOTOPES, RADIATION SOURCES, RADIATIONS, RADIOISOTOPES, SEMIMETALS, SPONTANEOUS FISSION RADIOISOTOPES, STABLE ISOTOPES, TARGETS, YEARS LIVING RADIOISOTOPES
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External URLExternal URL
Alrwashdeh, Mohammad, E-mail: rawashdeh.80@gmail.com2018
AbstractAbstract
[en] Highlights: • The analysis of 239Pu was performed using the SAMMY Code for Neutron Transmission, Capture, and Fission cross-sections in the resolved resonance region up to 2.5 keV. • Due to the difficulties of processing large covariance matrices, the evaluations were performed in the following distinct uncorrelated energy regions: 0.0–1.0 keV, 1.0 keV–2.0 keV, and 2.0 keV–2.5 keV. - Abstract: The analysis of 239Pu was performed using the SAMMY Code for Neutron Transmission, Capture, and Fission cross-sections in the resolved resonance region up to 2.5 keV. Due to the difficulties of processing large covariance matrices, the evaluations were performed in the following distinct uncorrelated energy regions: 0.0–1.0 keV, 1.0 keV–2.0 keV, and 2.0 keV–2.5 keV. By using version 8.0.0 of the SAMMY code, the treatment of large resonance parameter covariance matrices was improved significantly. The aim of this work is to analyze the experimental data using a self-developed experimental nuclear data fitting code FITWR and analyze it with the SAMMY code, then compare the results with Bayes method. Finally, the output results from these methods is processed by the SAMMY code in order to obtain covariance matrix resonance parameters in the energy range from 0 to 2.5 keV. All the computational experiments done for this paper was carried out at IMAN1 Center – Jordan’s National Supercomputing Center (IMAN1).
Primary Subject
Source
S0306454918302196; Available from http://dx.doi.org/10.1016/j.anucene.2018.04.034; Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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AbstractAbstract
[en] Results of mass distributions of fission fragments from the thermal neutrons induced fission of 239Pu in the high kinetic energy region are analyzed. Our measurements state that the fission configurations corresponding to the sup(106-108)Mo fragments are the less excited. Fragmentations of odd and even masses are equally distributed. Different interpretations of these results are compared
Original Title
Fragmentaciones frias en la fision inducida por neutrones termicos del 239Pu
Primary Subject
Record Type
Journal Article
Journal
Informe Nuclear; v.2(1); p. 55-64
Country of publication
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Caldwell, R.D.; Harper, R.M.
Proceedings of the first conference on decontamination and decommissioning (D and D) of ERDA facilities1975
Proceedings of the first conference on decontamination and decommissioning (D and D) of ERDA facilities1975
AbstractAbstract
[en] The difficult task of removing large pieces of highly contaminated equipment from an obsolete plutonium-239 facility was completed in a seven-month operation that included structural alteration of the process building. Detailed job planning, job execution and contamination control were major factors in accomplishing the task
Secondary Subject
Source
Energy Research and Development Administration, Idaho Falls, Idaho (USA). Idaho Operations Office; Aerojet Nuclear Co., Idaho Falls, Idaho (USA); p. 295-302; Sep 1975; Conference on decontamination and decommissioning of ERDA facilities; Idaho Falls, Idaho, USA; 19 Aug 1975
Record Type
Report
Literature Type
Conference
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Country of publication
Reference NumberReference Number
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AbstractAbstract
[en] Lifetimes of negative muons bound to 232Th, 235U, 238U and 239Pu have been determined to be 80.4+-2.0 ns (232Th), 78+-4 ns(235U), 81.5+-2.0 ns(238U) and 77.5+-2.0 ns(239Pu) by observing decay electrons from muons. Systematics of total muon capture rates are discussed. They are also compared with the lifetimes determined by fission fragments in view of possible fission-isomer excitation by muons. (Auth.)
Primary Subject
Record Type
Journal Article
Journal
Phys. Lett., B; v. 62(2); p. 233-236
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AbstractAbstract
No abstract available
Primary Subject
Source
45. Physicists' meeting Hamburg 1981 and spring meeting Hamburg 1981 of the DPG; Hamburg, Germany, F.R; 23 - 27 Mar 1981; Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; v. 16(6); p. 731

Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, ELEMENTARY PARTICLES, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, FISSION, HEAVY NUCLEI, ISOTOPES, MASSLESS PARTICLES, NUCLEAR REACTIONS, NUCLEI, PHOTONUCLEAR REACTIONS, PLUTONIUM ISOTOPES, RADIOISOTOPES, SCATTERING, TARGETS, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
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AbstractAbstract
No abstract available
Primary Subject
Source
Israel Atomic Energy Commission, Tel Aviv; p. 209-211; Jul 1984; p. 209-211
Record Type
Report
Report Number
Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, ANIMALS, BODY, EVEN-ODD NUCLEI, HEAVY NUCLEI, ISOTOPES, MAMMALS, MEASURING INSTRUMENTS, NUCLEI, ORGANS, PLUTONIUM ISOTOPES, PRIMATES, RADIATION DETECTORS, RADIOISOTOPES, RESPIRATORY SYSTEM, SCINTILLATION COUNTERS, SOLID SCINTILLATION DETECTORS, VERTEBRATES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
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