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Download or read book Neutrons from ([alpha], N) Sources written by Wilmot N. Hess and published by . This book was released on 1957 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author:
Publisher:
Published: 1998
Total Pages: 11
ISBN-13:
DOWNLOAD EBOOKIn many systems, it is imperative to have accurate knowledge of all significant sources of neutrons due to the decay of radionuclides. These sources can include neutrons resulting from the spontaneous fission of actinides, the interaction of actinide decay [alpha]-particles in ([alpha], n) reactions with low- or medium-Z nuclides, and/or delayed neutrons from the fission products of actinides. Numerous systems exist in which these neutron sources could be important. These include, but are not limited to, clean and spent nuclear fuel (UO2, ThO2, MOX, etc.), enrichment plant operations (UF6, PuF4, etc.), waste tank studies, waste products in borosilicate glass or glass-ceramic mixtures, and weapons-grade plutonium in storage containers. SOURCES-3A is a computer code that determines neutron production rates and spectra from ([alpha], n) reactions, spontaneous fission, and delayed neutron emission due to the decay of radionuclides in homogeneous media (i.e., a mixture of [alpha]-emitting source material and low-Z target material) and in interface problems (i.e., a slab of [alpha]-emitting source material in contact with a slab of low-Z target material). The code is also capable of calculating the neutron production rates due to ([alpha], n) reactions induced by a monoenergetic beam of [alpha]-particles incident on a slab of target material. Spontaneous fission spectra are calculated with evaluated half-life, spontaneous fission branching, and Watt spectrum parameters for 43 actinides. The ([alpha], n) spectra are calculated using an assumed isotropic angular distribution in the center-of-mass system with a library of 89 nuclide decay [alpha]-particle spectra, 24 sets of measured and/or evaluated ([alpha], n) cross sections and product nuclide level branching fractions, and functional [alpha]-particle stopping cross sections for Z
Download or read book SOURCES-3A written by and published by . This book was released on 1998 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many systems, it is imperative to have accurate knowledge of all significant sources of neutrons due to the decay of radionuclides. These sources can include neutrons resulting from the spontaneous fission of actinides, the interaction of actinide decay [alpha]-particles in ([alpha], n) reactions with low- or medium-Z nuclides, and/or delayed neutrons from the fission products of actinides. Numerous systems exist in which these neutron sources could be important. These include, but are not limited to, clean and spent nuclear fuel (UO2, ThO2, MOX, etc.), enrichment plant operations (UF6, PuF4, etc.), waste tank studies, waste products in borosilicate glass or glass-ceramic mixtures, and weapons-grade plutonium in storage containers. SOURCES-3A is a computer code that determines neutron production rates and spectra from ([alpha], n) reactions, spontaneous fission, and delayed neutron emission due to the decay of radionuclides in homogeneous media (i.e., a mixture of [alpha]-emitting source material and low-Z target material) and in interface problems (i.e., a slab of [alpha]-emitting source material in contact with a slab of low-Z target material). The code is also capable of calculating the neutron production rates due to ([alpha], n) reactions induced by a monoenergetic beam of [alpha]-particles incident on a slab of target material. Spontaneous fission spectra are calculated with evaluated half-life, spontaneous fission branching, and Watt spectrum parameters for 43 actinides. The ([alpha], n) spectra are calculated using an assumed isotropic angular distribution in the center-of-mass system with a library of 89 nuclide decay [alpha]-particle spectra, 24 sets of measured and/or evaluated ([alpha], n) cross sections and product nuclide level branching fractions, and functional [alpha]-particle stopping cross sections for Z
Author: Henry Herman Barschall
Publisher: Pergamon
Published: 1983
Total Pages: 378
ISBN-13:
DOWNLOAD EBOOKDownload or read book Neutron Sources written by Henry Herman Barschall and published by Pergamon. This book was released on 1983 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fluka written by Alfredo Ferrari and published by . This book was released on 2005 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author: Vladivoj Valkovic
Publisher: CRC Press
Published: 2015-08-25
Total Pages: 500
ISBN-13: 1482238012
DOWNLOAD EBOOKDespite the often difficult and time-consuming effort of performing experiments with fast (14 MeV) neutrons, these neutrons can offer special insight into nucleus and other materials because of the absence of charge. 14 MeV Neutrons: Physics and Applications explores fast neutrons in basic science and applications to problems in medicine, the envir
Download or read book 14 MeV Neutrons written by Vladivoj Valkovic and published by CRC Press. This book was released on 2015-08-25 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the often difficult and time-consuming effort of performing experiments with fast (14 MeV) neutrons, these neutrons can offer special insight into nucleus and other materials because of the absence of charge. 14 MeV Neutrons: Physics and Applications explores fast neutrons in basic science and applications to problems in medicine, the envir
Download or read book Neutron Yields of Several Light Elements Bombarded with Polonium Alpha Particles written by James H. Roberts and published by . This book was released on 1947 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author: H. Ullmaier
Publisher: Springer
Published: 1991-09-30
Total Pages: 0
ISBN-13: 9783540514350
DOWNLOAD EBOOKAtomic or point defects are disturbances of the periodicity of the crystal lattice extending over only a few atomic distances. Many physical and mechanical properties of solids are sensitive to their presence. Furthermore other defects which are crucial to material behaviour are influenced by their interaction with atomic defects. A detailed knowledge of production mechanisms and properties of point defects is therefore essential for assessing and for understanding the atomistic as well as the macroscopic behaviour of materials. As a result of the use of new research methods in recent years, such information is now available for almost all pure metals, for many dilute alloys and for some concentrated alloys. However, a critical and comprehensive collection of these data has so far been missing. The aim of the present volume is to close this gap by sifting, evaluating and compiling data on vacancies and self-interstitial atoms in solid metals. A chapter on the element helium is included because of the exeptional position of He as an "alloying" element and its role in radiation damage phenomena.
Download or read book Atomic Defects in Metals / Atomare Fehlstellen in Metallen written by H. Ullmaier and published by Springer. This book was released on 1991-09-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomic or point defects are disturbances of the periodicity of the crystal lattice extending over only a few atomic distances. Many physical and mechanical properties of solids are sensitive to their presence. Furthermore other defects which are crucial to material behaviour are influenced by their interaction with atomic defects. A detailed knowledge of production mechanisms and properties of point defects is therefore essential for assessing and for understanding the atomistic as well as the macroscopic behaviour of materials. As a result of the use of new research methods in recent years, such information is now available for almost all pure metals, for many dilute alloys and for some concentrated alloys. However, a critical and comprehensive collection of these data has so far been missing. The aim of the present volume is to close this gap by sifting, evaluating and compiling data on vacancies and self-interstitial atoms in solid metals. A chapter on the element helium is included because of the exeptional position of He as an "alloying" element and its role in radiation damage phenomena.
Author: U.S. Atomic Energy Commission
Publisher:
Published: 1952
Total Pages: 24
ISBN-13:
DOWNLOAD EBOOKDownload or read book Preparation, Properties, and Availability of Polonium Neutron Sources written by U.S. Atomic Energy Commission and published by . This book was released on 1952 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calibration of a Ra-Be Neutron Source by the B(n, [alpha]) Li Reaction written by F. G. P. Seidl and published by . This book was released on 1947 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author:
Publisher:
Published: 1959
Total Pages:
ISBN-13:
DOWNLOAD EBOOKA method is presented for measuring the average energy of the neutrons from a source. The attenuation of the neutrons by polyethylene is measured by the use of a long counter in good geometry. The attenuation length is a sensitive function of the neutron energy. The average neutron energies from several (alpha, n) sources were measwed and agree well with values obtained by other techniques. (auth).
Download or read book Measurement of Average Neutron Energies for ($alpha$, N) Neutron Sources written by and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A method is presented for measuring the average energy of the neutrons from a source. The attenuation of the neutrons by polyethylene is measured by the use of a long counter in good geometry. The attenuation length is a sensitive function of the neutron energy. The average neutron energies from several (alpha, n) sources were measwed and agree well with values obtained by other techniques. (auth).
