[3E09-12] Fission Theory 1

[3E09] Improvement of fission calculation based on the 4D Langevin model

*Kazuya Shimada¹, Xuan Zhang¹, Chikako Ishizuka¹, Satoshi Chiba¹ (1. Tokyo Tech)

Keywords:Nuclear physics, Nuclear data, Nuclear fission, Langevin model, Kinetic energy, Zero-point oscillation

In the 4D Langevin model developed by us, the fission mechanism has been elucidated in the region from actinides to super-heavy nuclei in a consistent manner without adjusting the model parameters. However, the mass distribution is strongly pulled by the magic number A = 132, and the agreement with the experimental data is worse than that of the 3D model.In this study, a couple of parameters that have been determined with the 3D model were adjusted. Furthermore new parameters corresponding to the zero-point vibrational energies of the dynamic variables were introduced. Then, the mass and TKE distributions of ²³⁶U and ²⁴⁰Pu were significantly improved so the model can be used for nuclear data evaluation.