Production of Bh in the Cm(Na,5)Bh reaction and its decay properties

Cm(Na,5)Bh反応によるBhの生成と崩壊特性

羽場 宏光*; Fan, F.*; 加治 大哉*; 笠松 良崇*; 菊永 英寿*; 小森 有希子*; 近藤 成美*; 工藤 久昭*; 森本 幸司*; 森田 浩介*; 村上 昌史  ; 西尾 勝久   ; Omtvedt, J. P.*; 大江 一弘*; Qin, Z.*; 佐藤 大輔*; 佐藤 望*; 佐藤 哲也   ; 重河 優大*; 篠原 厚*; 武山 美麗*; 田中 泰貴*; 豊嶋 厚史*; 塚田 和明  ; 若林 泰生*; Wang, Y.*; Wulff, S.*; 山木 さやか*; 矢納 慎也*; 安田 勇輝*; 横北 卓也*

Haba, Hiromitsu*; Fan, F.*; Kaji, Daiya*; Kasamatsu, Yoshitaka*; Kikunaga, Hidetoshi*; Komori, Yukiko*; Kondo, Narumi*; Kudo, Hisaaki*; Morimoto, Koji*; Morita, Kosuke*; Murakami, Masashi; Nishio, Katsuhisa; Omtvedt, J. P.*; Oe, Kazuhiro*; Qin, Z.*; Sato, Daisuke*; Sato, Nozomi*; Sato, Tetsuya; Shigekawa, Yudai*; Shinohara, Atsushi*; Takeyama, Mirei*; Tanaka, Taiki*; Toyoshima, Atsushi*; Tsukada, Kazuaki; Wakabayashi, Yasuo*; Wang, Y.*; Wulff, S.*; Yamaki, Sayaka*; Yano, Shinya*; Yasuda, Yuki*; Yokokita, Takuya*

The nuclide Bh was produced in the Cm(Na,5n)Bh reaction at beam energies of 125.9, 130.6, and 135.3 MeV. Decay properties of Bh were investigated with a rotating wheel apparatus for and spontaneous fission (SF) spectrometry under low background conditions attained by a gas-jet transport system coupled to the RIKEN gas-filled recoil ion separator. The half-life of Bh was measured to be = 10.0 s. The -particle energies of Bh disperse widely in the range of 8.62 - 9.40 MeV. The maximum production cross section for the Cm(Na,5n)Bh reaction was determined to be = 57 14 pb at 130.6 MeV.