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Book Neutron Energy Spectra Produced by Alpha bombardment of Light Elements in Thick Targets

Download or read book Neutron Energy Spectra Produced by Alpha bombardment of Light Elements in Thick Targets written by Gerardus J. Jacobs and published by . This book was released on 1982 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Neutron energy spectra produced by alpha bombardement of light elements in thick targets

Download or read book Neutron energy spectra produced by alpha bombardement of light elements in thick targets written by Gerardus J. Jacobs and published by . This book was released on 1982 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Calculated alpha induced Thick Target Neutron Yields and Spectra with Comparison to Measured Data

Download or read book Calculated alpha induced Thick Target Neutron Yields and Spectra with Comparison to Measured Data written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One component of the neutron source associated with the decay of actinide nuclides in many environments is due to the interaction of decay [alpha] particles in ([alpha], n) reactions on low Z nuclides. Measurements of ([alpha], n) thick target neutron yields and associated neutron spectra have been made for only a few combinations of [alpha] energy and target nuclide or mixtures of actinide and target nuclides. Calculations of thick target neutron yields and spectra with the SOURCES code require [alpha]-energy-dependent cross sections for ([alpha], n) reactions, as well as branching fractions leading to the energetically possible levels of the product nuclides. A library of these data has been accumulated for target nuclides of Z d"15 using that available from measurements and from recent GNASH code calculations. SOURCES, assuming neutrons to be emitted isotopically in the center-of-mass system, uses libraries of [alpha] stopping cross sections, ([alpha], n) reaction cross reactions, product nuclide level branching fractions, and actinide decay [alpha] spectra to calculate thick target ([alpha], n) yields and neutron spectra for homogeneous combinations of nuclides. The code also calculates the thick target yield and angle intergrated neutron spectrum produced by [alpha]-particle beams on targets of homogeneous mixtures of nuclides. Illustrative calculated results are given and comparisons are made with measured thick target yields and spectra. 50 refs., 1 fig., 2 tabs.

Book Photoneutron Sources

Download or read book Photoneutron Sources written by B. W. Sargent and published by . This book was released on 1946 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Comparison of alpha N Thick target Neutron Yields and Spectra from ORINGEN S and SOURCES

Download or read book Comparison of alpha N Thick target Neutron Yields and Spectra from ORINGEN S and SOURCES written by and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both ORIGEN-S and SOURCES generate thick-target neutron yields and energy spectra from ([alpha], n) reactions in homogeneous materials. SOURCES calculates yield and spectra for any material containing [alpha]-emitting and ([alpha], n) target elements by simulating reaction physics, using [alpha]-emission energy spectra, elemental stopping cross sections, ([alpha], n) cross sections for target nuclei, and branching fractions to produce-nuclide energy levels. This methodology results in accurate yield and spectra. ORIGEN-S has two options for calculating yields and spectra. The UO2 option (default) estimates yields and spectra assuming the input [alpha]-emitters to be infinitely dilute in UO2. The borosilicate-glass option estimates yields from the total input material composition and generates spectra purportedly representative of spectra generated by 238Pu, 241Am, 242Cm, and 244Cm infinitely dilute in borosilicate glass, even if none of these four [alpha]-emitters are present in the input material composition. Because yields from the borosilicate-glass option in ORIGEN-S are based on entire input material composition and are reasonably accurate, the same is often assumed to be true for spectra. The input/output functionality of the borosilicate-glass option, along with ambiguity in ORIGEN-S documentation, gives the incorrect impression that spectra representative of input compositions are generated. This impression is reinforced by wide usage of the SCALE code system and its ORIGEN-S module and their sponsorship by the US Nuclear Regulatory Commission.

Book The alpha induced Thick target gamma ray Yield from Light Elements

Download or read book The alpha induced Thick target gamma ray Yield from Light Elements written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The[alpha]-induced thick-target[gamma]-ray yield from light elements has been measured in the energy range 5.6 MeV[le] E[sub[alpha]][le] 10 MeV. The[gamma]-ray yield for> 2.1 MeV from thick targets of beryllium, boron nitride, sodium fluoride, magnesium, aluminum and silicon were measured using the[alpha]-particle beam from the Lawrence Berkeley Laboratories 88 in. cyclotron. The elemental yields from this experiment were used to construct the[alpha]-induced direct production[gamma]-ray spectrum from materials in the SNO detector, a large volume ultra-low background neutrino detector located in the Creighton mine near Sudbury, Canada. This background source was an order of magnitude lower than predicted by previous calculations. These measurements are in good agreement with theoretical calculations of this spectrum based on a statistical nuclear model of the reaction, with the gross high energy spectrum structure being reproduced to within a factor of two. Detailed comparison of experimental and theoretical excitation population distribution of several residual nuclei indicate the same level of agreement within experimental uncertainties.

Book High energy Nuclear Reactions in Astrophysics

Download or read book High energy Nuclear Reactions in Astrophysics written by Benjamin Shih Ping Shen and published by . This book was released on 1967 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Energy Research Abstracts

Download or read book Energy Research Abstracts written by and published by . This book was released on 1984 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Neutrons by Alpha particle Bombardment of Light Elements

Download or read book Neutrons by Alpha particle Bombardment of Light Elements written by Charles Sallaz Copeland and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Neutron Energy Spectra from the Thick Target 9Be d n 10 B Reaction

Download or read book Neutron Energy Spectra from the Thick Target 9Be d n 10 B Reaction written by Stewart Whittlestone and published by . This book was released on 1976 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Nuclear Science Abstracts

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-05 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt: