丰中子核^(107)Ru的集体转动带  

Collective Bands in Neutron-Rich ^(107) Ru Nucleus

作　　者：朱胜江[1] 许瑞清[1] J.H.Hamilton A.V.Ramayya J.K.Hwang 张征[1] 姜卓[1] 甘翠云[1] X.Q.Zhang I.Y.Lee J.O.Rasmussen W.C.Ma 

机构地区：[1]清华大学物理系,北京100084 [2]Department of Physics,Vanderbilt University [3]Lawrence Berkeley National Laboratory [4]Department of Physics,Mississippi State University

出　　处：《高能物理与核物理》2002年第8期791-796,共6页High Energy Physics and Nuclear Physics

基　　金：国家重点基础研究发展规划 (G2 0 0 0 0 7740 0 ) ;国家自然科学基金 (1 99775 0 2 8);美国能源部 (DE FG0 5 88ER40 40 7)资助~~

摘　　要：通过对2 5 2 Cf自发裂变产生的瞬发γ谱的测量 ,对丰中子奇A核10 7Ru的高自旋态集体转动带重新进行了研究 ,建立了新的能级纲图 .将基带转动带的自旋态扩展到 2 72  ,证实并扩展了以前发表的基于中子h11/2 激发产生的集体转动带 ,并新观测到一个基于 ( 9/ 2 - )能级的集体转动带 .研究结果澄清了早期发表的结果与近来别人发表的结果之间的矛盾 ,对新建立的10Through measuring prompt γ rays emitted in the spontaneous fission of 252 Cf with higher statistic data,level structures in the neutron rich,odd A 107 Ru nucleus have been re investigated. New level scheme of 107 Ru has been established. The ground state band was extended with spin up to 272  . The ν h 11/2 band structure observed in our previous publication has been confirmed and extended. These results clear up the inconsistence between our earlier work and results from another experiment published recently. A collective band built on (9/2 -) level has been observed for the first time. Some important features of the level scheme have been discussed.

关 键 词：丰中子核 ^107Ru 集体转动带 核结构 自发裂变 能级结构 钌^107 

分 类 号：O571.2[理学—粒子物理与原子核物理]