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Ota, Masahisa*; Tatsuda, Sayuki*; Wada, Takahiro*; Chiba, Satoshi; Koura, Hiroyuki; Maruyama, Toshiki; Kajino, Toshitaka*; Otsuki, Kaori*
no journal, ,
We propose a systematical method to calculate the fission fragment mass distribution (FFMD) for nuclear energy and astrophysical applications. The potential energy surface (PES) of fissionable nuclei is calculated by two-center shell model taking the mass-asymmetry, fragment deformation and distance of the fragments as parameters. Then, the ratio of symmetric and asymmetric fission modes is determined in a semi-empirical way. The present model can predict FFMD for a broad range of fissionable nuclei; Z=88 to 120. We compare the present results with measured data and systematics proposed by Katakura et al.
Chiba, Satoshi; Koura, Hiroyuki; Maruyama, Toshiki; Ota, Masahisa*; Tatsuda, Sayuki*; Wada, Takahiro*; Tachibana, Takahiro*; Kajino, Toshitaka*; Sumiyoshi, Kosuke*; Otsuki, Kaori*
no journal, ,
We introduce 
-delayed fission in r-process calculation, and investigate the difference of the abundance pattern of synthesized nuclei depending on the model of fission fragment mass distribution. We further discuss the impact of it on nucleo-cosmochronometer and possibility to restrict the physical condition of r-process sites.