[3E01-06] Nuclear Fission

[3E02] Fission mechanisms of uranium isotopes studied by the 4D Langevin model

*Kazuya Shimada¹, Chikako Ishizuka¹, Fedir A Ivanyuk², Satoshi Chiba¹ (1. Tokyo Tech, 2. Institute for Nuclear Research)

Keywords:Nuclear fission, Langevin model, Mass distribution, Kinetic energy, Neutron-rich nuclei, Neutron-deficient nucleus

From the viewpoint of nuclear energy utilization and basic research, the reaction process and quantitative evaluation of fission fragment mass number and average total kinetic energy (TKE) obtained by nuclear fission are essential. In this study, we calculated four-dimensional Langevin calculations for neutron-deficient and neutron-rich nuclei by changing the number of neutrons in ²³⁶U. We reproduced the mass distribution and TKE and explored the background of fission. When the number of neutrons was around 144, such as ²³⁶U, a two-peak distribution was observed in the fragment mass number, but when the number of neutrons increased, it changed to a one-peak distribution.