Abstract
Systematic and anomalous trends in fragment mass and TKE (total kinetic energy) distributions are investigated in terms of 4D Langevin model developed at Tokyo Tech. We have found that correlated transitions in symmetric components and dominant modes (symmetric v.s. asymmetric) can explain the prominent systematic and anomalous features of fission observables. We have also elucidated that interplay between spherical and deformed magicity at A=132 and A=142 to 144 is important in both observables.
Highlights
Fission is the most important and fundamental physics process in nuclear applications, but it is important in r-process nucleosynthesis in binary neutron-star merger as fission recycling is believed to be taking place
Thanks to recent progress in experimental technique, nuclear theory and computer science, our understanding on nuclear fission is in a stage of rapid progress, it is still a mysterious phenomenon due to its nature as a large-amplitude collective motion of many nucleon systems
We have carried out a systematic effort to construct a computational framework of nuclear fission, starting from compound nuclei through scission to emission prompt neutrons till β-decay, with less number of parameters and/or hypotheses
Summary
Fission is the most important and fundamental physics process in nuclear applications, but it is important in r-process nucleosynthesis in binary neutron-star merger as fission recycling is believed to be taking place.
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