2-9 Half-life Measurement of 94mRu44+ at CSRe

查看全文 作　　者：Zeng [1]Qi;Zhang [1]Yuhu;Wang [1]Meng;Xu [1]Hushan;Tu [1]Xiaolin;Zhou [1]Xiaohong;Yan [1]Xinliang;Chen [1]Ruijiu;Huang [1]Wenjia;Ge [1]Zhuang;Liu [1]Dawei;Fu [1]Chaoyi;Sun [1]Mingze;Mei [1]Bo;Xu [1]Xing;Xing [1]Yuanming;Shuai [1]Peng;Zang [1]Yongdong;Zhang [1]Wei;Xiao [1]Guoqing;[1]Yu.A.Litvinov;[1]Isao.Tanihata 机构地区：[1]不详 出　　处：《IMP & HIRFL Annual Report》索引2014年第1期,共2页 摘　　要：A radioactive nucleus is characterized with an intrinsic half-life. However, for a nuclear species, the half-lives inneutral atoms could be very different from that in highly charged ions. The half-lives of some highly charged ionshave been directly measured at GSI for multiple motivations[1]. In the same case, the nuclear state(i:e the isomer)may be in the range of several tens of microseconds and their half-live can be measured using isochronous massspectrometry. The J = 8+ isomeric state in 94Ru was chosen to test this method. The half-life of this isomer is71 s [2] in neutral atoms, and the excitation energy is 2.64 MeV. The internal conversion coefficient of this decayin neutral atom is 0.335. So its half-life in the bare nucleus would be modified to be 94.78 s when the internalconversion channel is blocked. 关 键 词：HALF-LIFE MEASUREMENT 94mRu44+