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ISBN 13 :
Total Pages : 151 pages
Book Rating : 4.:/5 (89 download)
Download or read book Measurements of 235U and 239Pu Fission Product Decay Spectra written by and published by . This book was released on 1979 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Data and Measurements Series written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The prompt-fission-neutron spectrum resulting from 239Pu fission induced by 0.55 MeV incident neutrons is measured from 1.0 to 10.0 MeV relative to that of 235U fission induced by the same incident-energy neutrons. The measurements employ the time-of-flight technique. Energy-dependent ratios of the two spectra are deduced from the measured values over the energy range 1.0 to 10.0 MeV. The experimentally-derived ratio results are compared with those calculated from ENDF/B-V, revision-2, and with results of recent microscopic measurements. Using the ENDF/B-V 235U Watt parameters for the 235U spectrum, the experimental measurements imply a ratio of average fission-spectrum energies of 239Pu/235U = 1.045 +- 0.003, compared to the value 1.046 calculated from ENDF/B-V, revision 2. 12 refs., 2 figs., 2 tabs.
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ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (684 download)
Download or read book Beta and Gamma Decay Heat Measurements Between 0.1s - 50,000s for Neturon Fission of 235U, 238U and 239Pu. Progress Report, June 1, 1992--December 31, 1994 written by and published by . This book was released on 1997 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the investigations reported here, a helium-jet/tape-transport system was used for the rapid transfer of fission products to a low-background environment where their aggregate beta and gamma-ray spectra were measured as a function of delay time after neutron induced fission of 235U, 238U and 239Pu. Beta and gamma-ray energy distributions have been deduced for delay times as short as 0.2 s and extending out to 100,000s. Instrumentation development during the initial phase of the project included: (1) assembly and characterization of a NaI(Tl) spectrometer for determining aggregate gamma-ray energy distributions, (2) development and characterization of a beta spectrometer (having excellent gamma-ray rejection) for measuring aggregate beta-particle energy distributions, (3) assembly and characterization of a Compton-suppressed HPGe spectrometer for determining gamma-ray intensities of individual fission products to deduce fission-product yields. Spectral decomposition and analysis codes were developed for deducing energy distributions from measured aggregate beta and gamma spectra. The aggregate measurements in the time interval 0.2 - 20s after fission are of special importance since in this region data from many short-lived nuclei are missing and summation calculations in this region rely on model calculations for a large fraction of their predicted beta and gamma decay heat energy spectra. Comparison with ENDF/B-VI fission product data was performed in parallel with the measurements through a close collaboration with Dr. T. England at LANL, assisted by one of our graduate students. Such aggregate measurements provide tests of the Gross Theory of beta decay used to calculated missing contributions to this data base. Fission-product yields deduced from the HPGe studies will check the accuracy of the semi-empirical Gaussian dispersion model used presently by evaluators in the absence of measured yields.
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ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (727 download)
Download or read book Beta and Gamma Decay Heat Measurements Between 0.1s--50,000s for Neutron Fission of 235U, 238U and 239Pu. Progress Report, June 1, 1992--February 28, 1993 written by and published by . This book was released on 1993 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A helium-jet/tape-transport system is employed in the study of beta-particle and gamma-ray energy spectra of aggregate fission products as a function of time after fission. During the initial nine months of this project we have investigated the following areas: Design, assembly and characterization of a beta-particle spectrometer; Measurement of 235U(n{sub th}ff) beta spectra for delay times 0.2 s to 12,000 s; Assembly and characterization of a 5 x 5 Nal(Tl) gamma-ray spectrometer; Measurement of 235U(n{sub th}ff) gamma-ray spectra for delay times 0.2s to 1 5,500s; Assembly and characterization of HPGe gamma-ray spectrometer with a Nal(Tl) Compton-and-background-suppression annulus; Measurement of 235U(n {sub th}, ff) high-resolution gamma-ray spectra for delay times 0.6 s to over 100,000 s; Comparison of individual gamma-line intensities with ENDF/B-VI; Adaptation to our computer of unfolding program FERDO for beta and gamma aggregate fission-product energy spectra and development of a spectrum-stripping program for analysis of HPGe gamma-ray spectra; Study of the helium-jet fission-fragment elemental transfer efficiency. This work has resulted in the publication of twelve BAPS abstracts of presentations at scientific meetings. There are currently four Ph. D. and two M.S. candidates working on dissertations associated with the project.
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Author :
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ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (727 download)
Download or read book Beta and Gamma Decay Heat Measurements Between 0. 1s--50,000s for Neutron Fission of [sup 235]U, [sup 238]U and [sup 239]Pu written by and published by . This book was released on 1993 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A helium-jet/tape-transport system is employed in the study of beta-particle and gamma-ray energy spectra of aggregate fission products as a function of time after fission. During the initial nine months of this project we have investigated the following areas: Design, assembly and characterization of a beta-particle spectrometer; Measurement of [sup 235]U(n[sub th]ff) beta spectra for delay times 0.2 s to 12,000 s; Assembly and characterization of a 5 [times] 5 Nal(Tl) gamma-ray spectrometer; Measurement of [sup 235]U(n[sub th]ff) gamma-ray spectra for delay times 0.2s to 1 5,500s; Assembly and characterization of HPGe gamma-ray spectrometer with a Nal(Tl) Compton-and-background-suppression annulus; Measurement of [sup 235]U(n [sub th], ff) high-resolution gamma-ray spectra for delay times 0.6 s to over 100,000 s; Comparison of individual gamma-line intensities with ENDF/B-VI; Adaptation to our computer of unfolding program FERDO for beta and gamma aggregate fission-product energy spectra and development of a spectrum-stripping program for analysis of HPGe gamma-ray spectra; Study of the helium-jet fission-fragment elemental transfer efficiency. This work has resulted in the publication of twelve BAPS abstracts of presentations at scientific meetings. There are currently four Ph. D. and two M.S. candidates working on dissertations associated with the project.
Author : K.H. Bockhoff
Publisher : Springer Science & Business Media
ISBN 13 : 9400970994
Total Pages : 1049 pages
Book Rating : 4.4/5 (9 download)
Download or read book Nuclear Data for Science and Technology written by K.H. Bockhoff and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1049 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the International Conference, Antwerp, Belgium, September 6-10, 1982
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ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (685 download)
Download or read book Beta and Gamma Decay Heat Measurements Between 0.1s-50,000s for Neutron Fission of 235U, 238U and 239Pu. Progress Report, March 1, 1993--January 31, 1994 written by and published by . This book was released on 1994 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decay heat measurements following the fast fission of 238U are well underway. The He-jet system and spectrometers were moved to the 1 MW research reactor to gain sufficient fast neutron flux for these measurements. On the Van de Graaff accelerator, the He-jet capillary has been shortened so that beta and gamma measurements following the thermal neutron fission of 235U could be made down to delay times near 0.1 s. Gamma-ray response functions are now well characterized for gamma energies up to 1.5 MeV for our large Nal spectrometer. Such response functions out to high energies are needed to extract energy distributions of our measured gamma spectra. The response function unfolding program, FERD-PC, has been operated successfully with trial spectra. Comparisons of individual fission products for 235U(n{sub th}f) with ENDF/B-VI at short delay times suggest several improvements to the data base particularly in production probabilities. The new data acquisition and data analysis systems have arrived and will soon be brought on line extending considerably the capabilities of our research group.
Author : M K Mehta
Publisher : World Scientific
ISBN 13 : 9814553727
Total Pages : 946 pages
Book Rating : 4.8/5 (145 download)
Download or read book Computation And Analysis Of Nuclear Data Relevant To Nuclear Energy And Safety written by M K Mehta and published by World Scientific. This book was released on 1993-12-16 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the modern nuclear models and computer codes used in nuclear model calculations of nuclear data required for nuclear technology and nuclear safety applications.
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ISBN 13 :
Total Pages : 1430 pages
Book Rating : 4.U/5 (183 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1984 with total page 1430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Author : United States. Energy Research and Development Administration
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ISBN 13 :
Total Pages : 1320 pages
Book Rating : 4.F/5 ( download)
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 658 pages
Book Rating : 4.3/5 (91 download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 952 pages
Book Rating : 4.F/5 ( download)
Download or read book INIS Atomindex written by and published by . This book was released on 1985 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen T. Dye
Publisher : Springer Science & Business Media
ISBN 13 : 0387707662
Total Pages : 366 pages
Book Rating : 4.3/5 (877 download)
Download or read book Neutrino Geophysics written by Stephen T. Dye and published by Springer Science & Business Media. This book was released on 2007-04-02 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: These pages present a collection of recent papers primarily documenting the nascent science of neutrino geophysics. Most of the papers followed from talks given at 1 Neutrino Sciences 2005: Neutrino Geophysics held at the University of Hawaii in December 2005. Several papers were solicited later in an e?ort to make the collection as comprehensive as possible. Every paper was scrutinized by an external reviewer to assure the quality of scienti?c content. These reviewers are thanked for lending their scienti?c expertise through their many thoughtful comments and suggestions. All authors are commended for providing excellent manuscripts of their important work while maintaining a spirit of cooperative collaboration throughout. Although every attempt was made to produce a thoroughly accurate volume, it is the accepted responsibility of the associate editor for any mistakes, errors, or omissions in the p- sented material. The recommendations, advice, and wisdom of John Learned and Sandip Pakvasa were indispensable in organizing and completing this project. P- duction charges were generously provided by the University of Hawaii. The support of Hawaii Paci?c University, which contributed teaching release time, is gratefully - knowledged. Stephen T. Dye Associate Editor November 28, 2006 Stephen T. Dye is an associate professor of physics at Hawaii Paci?c University and an a?liate to the graduate faculty of the Department of Physics and Astronomy at the University of Hawaii at Manoa. 1 See www. phys. hawaii. edu/~sdye/hnsc. html Earth, Moon, and Planets (2006) 99:1–15 Springer 2006 DOI 10.
Author : United States. Energy Research and Development Administration. Technical Information Center
Publisher :
ISBN 13 :
Total Pages : 588 pages
Book Rating : 4.3/5 (129 download)
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. M. R. Williams
Publisher : Elsevier
ISBN 13 : 1483103366
Total Pages : 297 pages
Book Rating : 4.4/5 (831 download)
Download or read book Progress in Nuclear Energy written by M. M. R. Williams and published by Elsevier. This book was released on 2013-10-22 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Nuclear Energy, Volume 5 covers the significant advances in several aspects of nuclear energy field. This book is composed six chapters that describe the progress in nuclear and gas-cooled reactors. The introductory chapter deals with the development and evolution of decay heat estimates and decay heat Standards, and illustrates the use of these estimates through comparison of both the actinide and fission product decay heat levels from typical fuel samples in a variety of reactor systems. The succeeding chapters present different practical methods for handling resonance absorption problem in the case of thermal reactor lattices and review the physics of the different noise phenomena. These topics are followed by discussions of the developed methodology for the description of breeding, conversion, long-term fuel logistics, and related subjects derived from the detailed mathematical description of the fuel cycle. The concluding chapters consider the historical development of heat transfer surfaces for gas-cooled reactors. These chapters also provide a complete set of differential nuclear data on the three technologically important americium isotopes, 241Am, 242Am, and 243Am, suitable for incorporation into the computer-based U.K. Nuclear Data Library. This book will prove useful to nuclear physicists and nuclear energy scientists and researchers.
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ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.3/5 (91 download)
Download or read book Evaluation of Fission Product Afterheat written by and published by . This book was released on 1977 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Smith
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (13 download)
Download or read book Prompt-fission Neutron Spectra of 233U, 235U, 239Pu and 240Pu Relative to that of 252Cf written by A. Smith and published by . This book was released on 1979 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
