Measurement of neutron-induced fission cross-sections of Th-232, U-238, U-233 and Np-237 relative to U-235 from 1 MeV to 200 MeV

摘要

The measurements of neurton-induced cross-section ratios for Th232, U238, U233 and Np237 relative to U235 have been carried out in the energy range from 1 MeV using the neutron time-of-flight spectrometer GNEIS based on 1 GeV proton synchrocyclotron. Below 20 MeV, the results of present measurements are roughly in agreement with evaluated data though there are some discrepances to be resolved.