A Comprehensive approach to determination of nuclear data of unstable nuclei

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.