Speaker
Description
Analyzing the current cosmic elemental composition opens the door to the origin of the cosmic elements. This requires a detailed analysis of the r-processes nucleosynthesis. Among them, our research is aimed at obtaining information on the fission of neutron-rich nuclei in the heavy and superheavy mass regions [1]. Fission fragments of neutron-rich nuclei in the superheavy elemental regions are thought to contribute to the r-process nucleosynthesis, and thus have a significant effect on the elemental composition of the universe. However, the fission of these neutron-rich regions is not accessible experimentally, so theoretical evaluation is important.
We have systematically calculated the mass distribution of fission fragments in the heavy and superheavy mass regions (2095 nuclei) using the dynamical model with the same conditions, and analyzed the characteristics of fission fragments.
From these extensive systematic calculations, we found that the mass distribution of fission fragments in the neutron-rich region shows certain characteristic tendencies within the dynamical model, but the systematics of the fission properties change around the “Island of Stability”, where nuclei have a strong nuclear structure. We would like to discuss, for example, how the specificity of the fission mode of Island of Stability the r-process network calculations.
[1] S. Tanaka, N. Nishimura, F. Minato, Y. Aritomo, Phys. Rev. C 108, 054607 (2023)
