Measurement of the Neutron Fission and Capture Cross Sections for ²³³U in the Energy Region 0.4 to 2000 eV

The neutron capture cross section and fission cross section for ²³³U have been measured simultaneously in the neutron energy range 0.4 to 2000 eV. A pulsed and collimated neutron beam was passed through a ²³³U fission chamber placed at the center of a large liquid scintillator. Capture and fission events in the ²³³U chamber were detected in the scintillator by means of their prompt gamma rays. Coincident signals from the fission chamber and liquid scintillator distinguished fission from capture events. Comparisons with previously published data, using similar and different methods, are given.