^(192)Tl高自旋态能级结构研究  

High Spin Level Structure of ^(192)Tl

作　　者：贺创业[1] 郑云[1] 李聪博[1] 吴晓光[1] 李广生[1] 钟健[1] 陈启明[1] 朱保吉 邓立涛 周文奎[1] 樊启文[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子核物理评论》2017年第3期465-468,共4页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11175259;11375267;11305269;11405274)~~

摘　　要：通过熔合蒸发反应^(181)Ta(^(16)O,5n)^(192)Tl,在入射束流为97 Me V能量下,布居^(192)Tl的高自旋态,更新了^(192)Tl的能级纲图。共增加8条新能级,尝试性地指定了能级自旋,将负宇称晕带的能级推高到23-。讨论了^(192)Tl与相邻同位素奇奇核^(194,196,198)Tl负宇称晕带的旋称劈裂与反转现象,发现随着中子数增加,^(196,198)Tl在高自旋处出现了旋称反转,其原因可能是由于中子质子相互作用与科里奥利力相互竞争所致。High spin states of192^ Tl were populated by the181^ Ta（16 O, 5 n）192^ Tl heavy ion fusion evaporation reaction at 97 MeV beam energy. A new level scheme with 8 new levels was constructed and the level spins were tentatively assigned. The negative yrast band was extended up to 23-. Systematics of signature of inversion were also discussed for the negative yrast band of odd-odd Tl istopes. Signature inversion has been found in196,198^Tl with neutron number increasing in these four Tl isotopes, and it is explained by the competition between the strength of n-p interaction and Coriolis force.

关 键 词：熔合蒸发反应 能级纲图 回弯 旋称反转 

分 类 号：O571.53[理学—粒子物理与原子核物理]