^(139)Pm核中磁转动带的研究  

Study of Magnetic Rotational Bands in ^(139)Pm Nucleus

作　　者：张宁涛[1,2] 张玉虎[1] 周小红[1] 柳敏良[1] 郑勇[1] 郭应祥[1] 雷祥国[1] 丁兵[1,2] 胡钧[1] 马飞[1] 陈亮[1,2] 王世陶[1,2] 吴晓光 郑云 

机构地区：[1]中国科学院近代物理研究所,甘肃兰州730000 [2]中国科学院研究生院,北京100049 [3]中国原子能研究院,北京102413

出　　处：《原子核物理评论》2012年第1期45-51,共7页Nuclear Physics Review

基　　金：国家重点基础研究发展计划项目(2007CB815005);国家自然科学基金资助项目(10825522;10735010;10775158)~~

摘　　要：通过重离子熔合蒸发反应116Cd(27Al,4n)布居了139Pm的高自旋激发态,用12台高纯锗探测器(HpGe)阵列进行了在束γ-γ符合测量。基于γ-γ符合关系及139Pm核已知的能级信息,建立了两条ΔI=1的负宇称带。利用相邻核能级结构的系统性和依据半经典的核子-核子有效作用的理论模型(SPAC)对这两条带能级结构进行了定量计算,认为它们属于磁转动带。High-spin states in 139Pm have been studied via the 116Cd（27Al,4n） heavy-ion fusion-evaporation reaction.The γ-γ coincidences were measured with 12 HpGe detectors.Based on γ-γ coincidence relationships and previously known levels in 139Pm,two ΔI=1 negative-parity bands have been established.From the systematic comparison with the neighbouring nuclei and semi-classical effective interaction model（SPAC） calculations,the two bands were suggested as magnetic rotational bands.

关 键 词：在束Γ谱学 扁椭形变 磁转动 集体转动 

分 类 号：O571.2[理学—粒子物理与原子核物理]