Fast Neutron-Induced Fission Cross Sections of ~(233, 234, 236, 238)U up to 200 MeV

摘要

The ~(233, 234, 236, 238)U fission cross sections have been measured relative to ~(235)U(n,f)for incident neutron energies from 200 keV to 200 MeV using neutron time-of-flight at the Los Alamos Neutron Science Center. The results are generally consistent with the current ENDF/B-Ⅶ evaluation, but some discrepancies with previous measurements above 20 to 30 MeV are observed. These measurements are part of a campaign to measure fission cross sections with high precision in support of fast reactor technology.