Prompt neutron and K x-ray emission from 236U fission fragments

A four-parameter investigation of neutron emission from individual 236U fission fragments is in progress. Prompt fission neutrons are detected in a large liquid scintillator operated in quadruple coincidence with three other detectors. Two surface barrier detectors determine the complementary fission-fragment kinetic energies and a third detector, a high-resolution lithium-drifted silicon detector, is used to measure the characteristic K X-rays emitted from one of the primary fission products. The four-parameter data have been analysed to yield the average number of neutrons emitted from 236U fission fragments of specific mass and charge. In addition, data from a preliminary investigation of the charge distribution for the thermal neutron fission of 235U are presented. (author)