INTERMEDIATE STRUCTURE IN THE NEUTRON-INDUCED FISSION CROSS-SECTION OF U-236

Neutron-induced fission of U-236 has been measured at the Los Alamos N eutron Scattering Center with a white neutron source using a fast para llel plate ionization chamber at a flight path of approximately 56 m. In the resonance and the intermediate resonance region, very little of the previously reported structure was detected. Only five resonance s tructures were observed. Additionally, the width of the 5.45 eV resona nce is approximately 100 times smaller than previously reported. An ex planation for the discrepancies between old data and data reported her e is discussed. New fission widths for resonances from 5.45 eV to 10.4 keV are reported. The new data are in agreement with theoretical esti mates.