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Measurement of the fission cross sections of uranium-233 and plutonium-239 relative to uranium-235 from 1 keV to 30 MeV

Journal Article · · Nucl. Sci. Eng.; (United States)
DOI:https://doi.org/10.13182/NSE78-1· OSTI ID:6668652
The fission cross-section ratios of /sup 233/U to /sup 235/U and /sup 239/Pu to /sup 235/U were measured over the neutron energy range from 1 keV to 30 MeV at the Lawrence Livermore Laboratory 100-MeV Linac. Ionization fission chambers and the time-of-flight technique were used to take data simultaneously over the entire energy range. This provided accurate determinations of the shape versus neutron energy of the ratios. Two independent methods were used to determine the average value of each ratio in the interval from 1.75 to 4.0 MeV for the purpose of normalization. Over the 1-keV to 30-MeV range, the total uncertainties for the /sup 233/U-to-/sup 235/U data range from 2 to 4%; the /sup 239/Pu-to-/sup 235/U data uncertainties range from 1 to 4%.
Research Organization:
Lawrence Livermore Lab., CA
OSTI ID:
6668652
Journal Information:
Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 66:2; ISSN NSENA
Country of Publication:
United States
Language:
English