Dynamical approach to fission using six-dimensional Cassini shape parameterization

6次元カッシーニ形状パラメタリゼーションによる核分裂への動的アプローチ

岡田 和記; 西尾 勝久   

Okada, Kazuki; Nishio, Katsuhisa

The dynamical approach to fission using the multi-dimensional Langevin equation plays an essential role in understanding the fission mechanism. This approach provides a description of the fission process from the ground state to scission by solving the time evolution of shape parameters. The key challenge is that the results largely depend on the choice of shape parameterization, especially when the number of parameters is small. The four- and five-dimensional two-center shell model has been applied as a practical model for representing typical fragment shapes. In our study, to account for various fission modes, we employ the Cassini shape parameterization, which can flexibly describe a wide range of deformed shapes through combinations of shape parameters. To reduce the dependence of the results on the parameterization, it is crucial to perform calculations in high-dimensional Cassini shape coordinates. In this seminar, we will discuss the current results and future plan of our study with the six-dimensional Cassini shape parameterization, computed with the supercomputer at JAEA.