Measurements of the Total Neutron Cross Section of Uranium-233 Between 40 keV and 4.5 MeV

The total neutron cross section of ²³³U was measured between 40 keV and 4.5 MeV. “Monoenergetic” neutrons were used over the total energy range with the time-of-flight (TOF) technique employed for background suppression. At lower energies (<200 keV), pseudo-white spectra TOF techniques were also used. Present results are up to 10% higher than previous measurements between 40 and 500 keV, and a similar difference exists relative to the evaluated nuclear data file ENDF/B-IV.