Investigation of fission properties and evaporation residue measurement in the reactions using U target nucleus

U標的を用いた重イオン入射反応における核分裂特性と蒸発残留核の測定

西尾 勝久   ; 池添 博; Hofmann, S.*; Ackermann, D.*; Antalic, S.*; 有友 嘉浩; Comas, V. F.*; Dllmann, Ch. E.*; Gorshkov, A.*; Graeger, R.*; 萩野 浩一*; Heinz, S.*; Heredia, J. A.*; 廣瀬 健太郎*; Khuyagbaatar, J.*; Kindler, B.*; Kojouharov, I.*; Lommel, B.*; 牧井 宏之   ; Mann, R.*; 光岡 真一; 永目 諭一郎 ; 西中 一朗; 大槻 勤*; Popeko, A. G.*; Saro, S.*; Schdel, M.*; Trler, A.*; 若林 泰生; 渡辺 裕*; Yakushev, A.*; Yeremin, A. V.*

Nishio, Katsuhisa; Ikezoe, Hiroshi; Hofmann, S.*; Ackermann, D.*; Antalic, S.*; Aritomo, Yoshihiro; Comas, V. F.*; Dllmann, Ch. E.*; Gorshkov, A.*; Graeger, R.*; Hagino, Koichi*; Heinz, S.*; Heredia, J. A.*; Hirose, Kentaro*; Khuyagbaatar, J.*; Kindler, B.*; Kojouharov, I.*; Lommel, B.*; Makii, Hiroyuki; Mann, R.*; Mitsuoka, Shinichi; Nagame, Yuichiro; Nishinaka, Ichiro; Otsuki, Tsutomu*; Popeko, A. G.*; Saro, S.*; Schdel, M.*; Trler, A.*; Wakabayashi, Yasuo; Watanabe, Yutaka*; Yakushev, A.*; Yeremin, A. V.*

Fission fragment mass distributions after full momentum transfer of the projectile were measured in the reactions using a U target nucleus bombarded by Si, P, S, Ar, Ca projectiles. We observed a strong variation of the distribution as function of bombarding energy. The results were interpreted by the effects of nuclear deformation of the target nucleus on the competition between fusion and quasifission. The symmetric fission includes fusion-fission, wheres as the asymmetric fission represents quasifission. The fusion probabilities were determined with the help of fluctuation-dissipation model. The estimated evaporation residue cross sections (Sg and Hs) produced in Si + U and S+U reproduced the experimental data.