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Fission yield measurement using multi-nucleon transfer reactions

多核子移行反応による核分裂収率の測定

廣瀬 健太郎; 西尾 勝久; 田中 翔也*; Leguillon, R.*; 牧井 宏之; 西中 一朗*; Orlandi, R.; 塚田 和明; Smallcombe, J.*; Vermeulen, M. J.*; 千葉 敏*; 有友 嘉浩*; 大槻 勤*; Tsekhanovich, I.*; Andreyev, A. N.*

Hirose, Kentaro; Nishio, Katsuhisa; Tanaka, Shoya*; Leguillon, R.*; Makii, Hiroyuki; Nishinaka, Ichiro*; Orlandi, R.; Tsukada, Kazuaki; Smallcombe, J.*; Vermeulen, M. J.*; Chiba, Satoshi*; Aritomo, Yoshihiro*; Otsuki, Tsutomu*; Tsekhanovich, I.*; Andreyev, A. N.*

The multi-nucleon transfer reaction is very useful way to populate a multitude of nuclides in a wide excitation energy range. We have developed a measurement system at the JAEA tandem accelerator facility to obtain fission observables such as fission-fragment mass distributions (FFMD), prompt fission neutron multiplicities and so on. By identifying the ejectile, the initial compound nucleus is also identified. At high excitation energies, fission of nuclides produced via neutron emission from the initial compound nucleus also contribute to FFMD. In the present study, effects of the multi-chance fission on FFMDs were successfully separated by a combination of a systematic data set obtained from experiments using $$^{18}$$O beams and actinide targets and a dynamical fission calculation based on the fluctuation-dissipation model.

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