^(173)W的高自旋态和γ5/2^-[512]转动带的旋称反转  

High-spin states of ^(173)W and the signature inversion in the γ1/2^-[512] rotational band

作　　者：王海霞[1,2] 张玉虎[1] 周小红[1] 柳敏良[1] 丁兵[1,2] 周厚兵[1,2] 李广顺[1,2] OSHIMA M KOIZUMI M TOH Y KIMURA A HARADA H FURUTAKA K KITATANI F NAKAMURA S HATSUKAWA Y OHTA M HARA K KIN T 孟杰[4] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院研究生院,北京100049 [3]Japan Atomic Energy Agency,Tokai-Mura,Ibaraki 319-1195,Japan [4]北京大学物理系,北京100871

出　　处：《中国科学：物理学、力学、天文学》2012年第5期505-514,共10页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:11175217;10825522;GJ073005);国家重点基础研究发展计划(编号:2007CB815000);中国科学院基金资助项目

摘　　要：利用150Nd(28Si,5n)熔合蒸发反应居了173W的高旋态.于标准在束核谱学实验测量结果,扩展了于γ7/2+[633],γ5/2-[512]和γ1/2-[521]准组态的转动带.首次建了173W γ1/2-[521]转动带的能量非优先分支.发现γ5/2-[512]转动带在低旋区出现旋称反转.相似的旋称劈行为表明174Reπ1/2-[541]γ5/2-[512]转动带的旋称反转来位于5/2-[512]轨道的中.旋称反转制有待进一研究.High-spin states of 173W have been populated using the 150 Nd（28 Si,5n） reaction at beam energies of 135 and 140 MeV.The previously known bands associated with the γ7/2＋[633], γ5/2-[512], and γ1/2-[521] configurations are extended significantly, and the unfavored signature branch of the γ1/2-[521] band is established for the first time. Low-spin signature inversion is observed in the γ5/2-[512] band. Similar behavior of the signature splitting indicates that the abnormal splitting in the π1/2-[541]γ5/2-[512] band of 174Re comes from the neutron at the 5/2-[512] orbit. Such signature inversion mechanism needs further investigation.

关 键 词：173W  转动带  旋称反转 

分 类 号：O571.2[理学—粒子物理与原子核物理]