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M. Okubayashi

Publications and source records attributed to M. Okubayashi.

2 recordsLinked to original sources

Modeling of nuclear reactions with Langevin calculations

The mass angle distribution shows a strong correlation between mass and angle when quasifission events are dominant. Therefore, as long as quasifission events are dominant, the mass angle distribution is characterized in that a diagonal correlation appears. This diagonal correlation could not be reproduced in our previous model that is before introducing $f_\text{ina}$ and $γ_\text{t}^{0}$ model parameters. In this study, we clarify the indeterminate parameters included in the model to reproduce the diagonal correlation appearing in the mass angle distribution in the $^{48}$Ti + $^{186}$W reaction system. As a result, $f_\text{ina}$ and $γ_\text{t}^{0}$ of model parameters were found to be key parameters for MAD. it was also found that the balance between $f_\text{ina}$ and $γ_\text{t}^{0}$ parameter values is important for the strong correlation between mass and angle.

nucl-th

Fission fragment distributions of neutron-rich nuclei based on Langevin calculations: toward r-process simulations

The nuclear fission of very neuron-rich nuclei related to the r-process is essential for the termination of nucleosynthesis flows on the nuclear chart and the final abundances. Nevertheless, most of the available fission data for the r-process calculations are based on theory predictions, including phenomenological treatments. In this study, we calculated a series of nuclear fission distribution for neutron-rich nuclei away from the beta-stability line. As most of these nuclei are experimentally unknown, we are based on theoretical calculations based on the dynamical fission model with the Langevin method. We performed fission distribution calculations for neutron-rich actinoid nuclei, applicable to the r-process nucleosynthesis simulations. In the present paper, we compared the obtained mass and charge distributions with experimental data. We also show the results of the systematic behaviour of mass distribution for neutron-rich U and Fm isotopes.

nucl-th