Prompt neutrons from proton-induced fission

[摘要] Spectra of neutron time-of-flight vs fission fragment energy have been measured for proton-induced fission of U238 and Th232 at a bombarding energy of 9 MeV. The proton beam was provided by the Rice University Tandem Van de Graaff accelerator, and the two-parameter data were recorded with the Bonner Nuclear Laboratories (1000 x 1000) channel computer analyzer. The efficiency of the neutron detector system was determined by the H2(d,n)He3 reaction. The energy spectrum of prompt neutrons has been found to be nearly Maxwellian in form as expected on the basis of evaporation from moving fragments, and the average kinetic energy of the neutrons has been found to satisfy the relationship

[发布机构] Rice University