Nucleon-induced Fission Cross-sections at Transitive Energy Region 20 - 200 MeV

摘要

The new approach to the calculation of nucleon induced fission cross sections at energies 20-200 MeV is presented. The cross sections of multiconfiguration fission is calculated as a sum of fission cross-sections for nuclei formed in process of fast (direct) and precompound stage of fission reaction. The intranuclear cascade model is used for description of direct stage and precompound-statistical model for calculation of fission and de-excitation cross sections. Calculated with new optical model parameters sets fission cross sections are compared with experimental data for neutron-induced fission of ~(237)Np, ~(239)Pu, ~(235,238)U and proton-induced fission of ~(235,238)U. Brief information about new code system is also presented.