A Comprehensive approach to determination of nuclear data of unstable nuclei

不安定核の核データ取得に向けた取り組み

千葉 敏*; 西尾 勝久   ; 有友 嘉浩*; 小浦 寛之   ; 岩本 修  ; 牧井 宏之   ; 西中 一朗*; 廣瀬 健太郎  

Chiba, Satoshi*; Nishio, Katsuhisa; Aritomo, Yoshihiro*; Koura, Hiroyuki; Iwamoto, Osamu; Makii, Hiroyuki; Nishinaka, Ichiro*; Hirose, Kentaro

A comprehensive approach to determine nuclear data of unstable nuclei will be described. It consists of a measurement of fission and capture cross sections, mass distribution of fission fragments (independent fission yields) and number of prompt fission neutrons by the method of surrogate reactions. A multi-dimensional Langevin model is being developed to estimate the independent fission yields theoretically. Furthermore, the decay properties of the fission fragments, almost all are neutron-rich unstable nuclei, are investigated systematically by improving the gross theory of decay, which will yield information on the decay heat and delayed-neutron data.