Evaluation of pre-neutron-emission mass distributions of neutron-induced typical actinide fission using scission point model * *Supported by the NSFC-Nuclear Technology Innovation Joint Fund (U1867213), the NSAF (U1830102), the National Natural Science Foundations of China (12075105, 11705071, 11875155) and the Fundamental Research Funds for the Central Universities (lzujbky-2021-kb09)

Abstract

The scission point model is improved by considering the excitation-dependent liquid drop model to calculate mass distributions for neutron-induced actinide nuclei fission. Excitation energy effects influence the deformations of light and heavy fragments. The improved scission point model shows a significant advance with regard to accuracy for calculating pre-neutron-emission mass distributions of neutron-induced typical actinide fission with incident-neutron-energies up to 99.5 MeV. The theoretical frame assures that the improved scission point model is suitable for evaluating the fission fragment mass distributions, which will provide guidance for studying fission physics and designing nuclear fission engineering and nuclear transmutation systems.