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Download or read book Proposal, Precompound Emission of Energetic Light Fragments in Spallation Reactions written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Leslie Marie Kerby
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (947 download)
Download or read book Precompound Emission of Energetic Light Fragments in Spallation Reactions written by Leslie Marie Kerby and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emission of light fragments (LF) from nuclear reactions is an open question. Different reaction mechanisms contribute to their production; the relative roles of each, and how they change with incident energy, mass number of the target, and the type and emission energy of the fragments is not completely understood. None of the available models are able to accurately predict emission of LF from arbitrary reactions. However, the ability to describe production of LF (especially at energies ~ 30 MeV) from many reactions is important for different applications, such as cosmic-ray-induced Single Event Upsets (SEUs), radiation protection, and cancer therapy with proton and heavy-ion beams, to name just a few. The Cascade-Exciton Model (CEM) version 03.03 and the Los Alamos version of the Quark-Gluon String Model (LAQGSM) version 03.03 event generators in Monte Carlo N-Particle Transport Code version 6 (MCNP6) describe quite well the spectra of fragments with sizes up to 4He across a broad range of target masses and incident energies (up to ~ 5 GeV for CEM and up to ~1 TeV/A for LAQGSM). However, they do not predict the high-energy tails of LF spectra heavier than 4He well. Most LF with energies above several tens of MeV are emitted during the precompound stage of a reaction. The current versions of the CEM and LAQGSM event generators do not account for precompound emission of LF larger than 4He. The aim of our work is to extend the precompound model in them to include such processes, leading to an increase of predictive power of LF-production in MCNP6. This entails upgrading the Modified Exciton Model currently used at the preequilibrium stage in CEM and LAQGSM. It also includes expansion and examination of the coalescence and Fermi break-up models used in the precompound stages of spallation reactions within CEM and LAQGSM. Extending our models to include emission of fragments heavier than 4He at the precompound stage has indeed provided results that have much better agreement with experimental data.
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ISBN 13 :
Total Pages : 223 pages
Book Rating : 4.:/5 (925 download)
Download or read book Dissertation written by and published by . This book was released on 2015 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Results of Investigating Precompound Emission of Light Fragments in Spallation Reactions, Summer 2012 written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preequilibrium Emission of Light Fragments in Spallation Reactions written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.E/5 ( download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 600 pages
Book Rating : 4.:/5 (3 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pairing-energy Coefficients of Neutron-rich Fragments in Spallation Reactions *Supported by National Natural Science Foundation of China (U1732135), Natural Science Foundation of Henan Province (162300410179) and Henan Normal University for the Excellent Youth (154100510007). written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The ratio of pairing-energy coefficient to temperature ( a p / T ) of neutron-rich fragments produced in spallation reactions has been investigated by adopting an isobaric yield ratio method deduced in the framework of a modified Fisher model. A series of spallation reactions, 0.5 A and 1 A GeV 208 Pb + p, 1 A GeV 238 U + p, 0.5 A GeV 136 Xe + d, 0.2 A, 0.5 A and 1 A GeV 136 Xe + p, and 56 Fe + p with incident energy ranging from 0.3 A to 1.5 A GeV, has been analysed. An obvious odd-even staggering is shown in the fragments with small neutron excess ( I ≡ N - Z ), and in the relatively small- A fragments which have large I . The values of a p / T for the fragments, with I from 0 to 36, have been found to be in a range from −4 to 4, and most values of a p / T fall in the range from −1 to 1. It is suggested that a small pairing-energy coefficient should be considered in predicting the cross sections of fragments in spallation reactions. It is also concluded that the method proposed in this article is not good for fragments with A/A s > 85% (where A s is the mass number of the spallation system).
Author : United States. Energy Research and Development Administration
Publisher :
ISBN 13 :
Total Pages : 852 pages
Book Rating : 4.3/5 (91 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 1977 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H Nifenecker
Publisher : CRC Press
ISBN 13 : 1420034731
Total Pages : 324 pages
Book Rating : 4.4/5 (2 download)
Download or read book Accelerator Driven Subcritical Reactors written by H Nifenecker and published by CRC Press. This book was released on 2003-06-01 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the basic knowledge in nuclear, neutron, and reactor physics necessary for understanding the principle and implementation of accelerator driven subcritical nuclear reactors (ADSRs), also known as hybrid reactors. Since hybrid reactors may contribute to future nuclear energy production, the book begins with a discussion of
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ISBN 13 :
Total Pages : 828 pages
Book Rating : 4.3/5 (91 download)
Download or read book Physics Briefs written by and published by . This book was released on 1988 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1022 pages
Book Rating : 4.:/5 (319 download)
Download or read book INIS Atomindex written by and published by . This book was released on 1988 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (3 download)
Download or read book Government Reports Announcements written by and published by . This book was released on 1975-07-25 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 850 pages
Book Rating : 4.:/5 (334 download)
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1975-07 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 322 pages
Book Rating : 4.3/5 (91 download)
Download or read book Proceedings of the Specialists' Meeting on Shielding Aspects of Accelerators, Targets, and Irradiation Facilities written by and published by . This book was released on 1999 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 596 pages
Book Rating : 4.:/5 (3 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1987 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
Author : OECD Nuclear Energy Agency
Publisher : Paris, France : Nuclear Energy Agency, Organisation for Economic Co-operation and Development
ISBN 13 :
Total Pages : 436 pages
Book Rating : 4.3/5 (91 download)
Download or read book Proceedings of the Fifth Meeting of the Task Force on Shielding Aspects of Accelerators, Targets and Irradiation Facilities written by OECD Nuclear Energy Agency and published by Paris, France : Nuclear Energy Agency, Organisation for Economic Co-operation and Development. This book was released on 2001 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last 50 years particle accelerators have evolved from simple devices to powerful machines, and will continue to have an important impact on research, technology and lifestyle. Today, they cover a wide range of applications, from television and computer displays in households to investigating the origin and structure of matter. It has become common practice to use particle accelerators for material science and medical applications. In recent years, requirements from new technological and research applications have emerged, giving rise to new radiation shielding aspects and problems. These workshop proceedings review recent progress in radiation shielding of accelerator facilities, evaluating advancements and discussing further developments needed with respect to international co-operation in this field.
