Multi-modal analysis for low energy neutron-induced fission of U-231

作者：Zheng Na^*; Fan Tie Shuan; Ding Yi; Zhong Chun Lai; Li Xiang Qing; Chen Jin Xiang

来源：Chinese Physics C, 2010, 34(1): 49-55.

• U-235 (n, f)
• multi-model
• prompt neutron
• fragment property

Low energy neutron induced fission of U-235 is studied in the framework of the multi-modal fission model. The fission fragment properties, such as the yields, the average total kinetic energy distribution and the average neutron separation energy, are investigated for incident neutron energies from thermal to 6.0 MeV. The multi-modal fission approach is also used to evaluate the prompt fission neutron multiplicity and spectra for the neutron-induced fission of U-235 with an improved version of the Los Alamos model for incident neutrons below the (n, nf) threshold. The three most dominant fission modes are taken into account. The model parameters are determined on the basis of experimental data. The calculated results are in good agreement with the experimental data.

• 出版日期2010-1
• 单位北京大学