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

• 作者: Chen Ruijiu Fu Chaoyi Ge Zhuang Huang Wenjia Isao.Tanihata Liu Dawei Mei Bo Shuai Peng Sun Mingze Tu Xiaolin Wang Meng Xiao Guoqing Xing Yuanming Xu Hushan Xu Xing Yan Xinliang Yu.A.Litvinov Zang Yongdong Zeng Qi Zhang Wei Zhang Yuhu Zhou Xiaohong
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报：英文版
• 学科: 物理学
• 关键词: HALF-LIFE MEASUREMENT 94mRu44+
• 年，卷（期）: 2014,（1）
• 页码范围: 40-41
• 页数: 2页
• 分类号: O4

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.