^(176,178)Os新低位激发态的识别  

Identification of New Low-lying Excited States in ^(176,178)Os

作　　者：王华磊[1] 张玉虎[1] 周小红[1] 郭应祥[1] 雷祥国[1] 徐树威[1] 谢元祥[1] 郑勇[1] 柳敏良[1] 邢烨炳[1] 谢成营[1] 宋立涛[1] 郭文涛[1] T.Hayakawa M.Oshima Y.Toh J.Katakura Y.Hatssukawa M.Matsuda N.Shinohara T.Ishii H.Kusakari M.Sugawara T.Komatsubara 

机构地区：[1]中国科学院近代物理研究所 [2]Japan Atomic Energy Research Institute [3]Chiba University,Inage-ku,Chiba263-8512,Japan [4]Chiba Institute of Technology,Narashino Chiba275-0023,Japan [5]Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki305-0006,Japan

出　　处：《原子核物理评论》2006年第1期13-17,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10025525;10375077;10221003);国家重点基础研究发展规划资助项目(TG2000077400);中国科学院基金资助项目~~

摘　　要：利用在束实验产生具有β+/EC衰变性质核素176,178Ir,分析了在束实验条件下获得的γ-γ符合数据,识别出了176Os的4条新能级和13条新γ跃迁、178Os的5条新能级和14条新γ跃迁。籍助氦喷嘴快速带传输系统,进一步对176Ir的β+/EC衰变进行了测量,在确认在束测量新γ射线的同时建议了176Ir的一个低自旋同核异能态。通过两准粒子耦合的半经验计算,建议了176,178Ir基态及同核异能态的组态。The γ rays following the β^＋/EC decay of ^176. 178Ir nuclei have been investigated using in-beam γ- ray experiment. A total of 4 new levels, 13 new γ transitions of ^176Os and 5 new levels, 14 new γ transitions of ^178Os were identified. In addition, with the aid of a helium-jet recoil fast tape transport system, the β^＋/EC decay of ^176Ir was further studied, the above new γ rays were proved and an isomer was proposed in ^176Ir. By the semiempirical calculations of two-quasiparticle intrinsic states of odd-odd nuclei, the configurations of ground states and isomeric states were also proposed for ^176, 178Ir.

关 键 词：低位能级纲图 在束测量 半衰期 

分 类 号：O571.22[理学—粒子物理与原子核物理]