https://doi.org/10.1051/epjconf/202327911021
The evaluation of the fission mode and fragment yields of neutron-rich nuclei by the dynamical model
1 RIKEN Nishina Center for Accelerator-Based Science, RIKEN, Saitama 351-0198, Japan
2 Astrophysical Big Bang Laboratory, CPR, RIKEN, Saitama 351-0198, Japan
3 Graduate School of Science and Engineering Research, Kindai University, Higashiosaka, Osaka, 5778502, Japan
* e-mail: shoya.tanaka@riken.jp
** e-mail: nobuya.nishimura@riken.jp
*** e-mail: 2233340472d@kindai.ac.jp
**** e-mail: aritomo@ele.kindai.ac.jp
Published online: 22 March 2023
Nucleosynthesis by the rapid neutron-capture process (r-process) produces elements heavier than iron via neutron-rich nuclides, observed in the solar system and stars with various metallicities. In the r-process, fission plays a fundamental role by recycling the matter during neutron irradiation and by shaping the final r-abundance distribution. Nevertheless, due to the difficulty of experimental approaches, most of the fission data available for r-process calculations are based on theoretical predictions with phenomenological models. In this study, we focused on the transition of fission mode from asymmetric to symmetric in neutron-rich isotopes, which has been suggested in recent experiments for fermium isotopes. We investigated the fission of neutron-rich nuclei by a theoretical calculation based on the dynamical model and employed Langevin equations.
© The Authors, published by EDP Sciences, 2023
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