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The prompt fission neutron spectra for the neutron-induced fission of ~(233)U for low energy neutrons(below6 MeV) are calculated using nuclear evaporation theory with a semi-empirical method,in which the partition of the total excitation energy between the fission fragments for the nth+~(233)U fission reactions is determined by the available experimental and evaluation data.The calculated prompt fission neutron spectra agree well with the experimental data.The proportions of high-energy neutrons of prompt fission neutron spectrum versus incident neutron energies are investigated with the theoretical spectra,and the results are consistent with the systematics.The semi-empirical method could be a useful tool for the prompt evaluation of fission neutron spectra.
The prompt fission neutron spectra for the neutron-induced fission of ~ (233) U for low energy neutrons (below 6 MeV) are calculated using nuclear evaporation theory with a semi-empirical method, in which the partition of the total excitation energy between the fission fragments for the nth + ~ (233) U fission reactions is determined by the available experimental and evaluation data. calculated prompt fission neutron spectra agree well with the experimental data. proportions high-energy neutrons of prompt fission neutron spectrum versus incident neutron energies are investigated with the theoretical spectra, and the results are consistent with the systematics. The semi-empirical method could be a useful tool for the prompt evaluation of fission neutron spectra.