双奇核^(174)Re中的准粒子形状驱动效应  

Quasi-particle Shape Driving Effects in Odd-odd ^(174)Re

作　　者：郭松[1,2] 张玉虎[1] 周小红[1] 强赟华[1] 郭文涛[1] 郭应祥[1] 方永得[1] 

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

出　　处：《原子核物理评论》2009年第4期282-287,共6页Nuclear Physics Review

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

摘　　要：对双奇核174Re的在束γ谱学实验数据作了仔细分析,提取出了带间与带内E2γ跃迁分支比,并导出了其约化跃迁概率的比值。用带混合理论对约化跃迁概率的比值进行了分析,得到带间相互作用强度及转动带形变的信息。发现不同组态的转动带其跃迁电四极矩具有明显的差异。与相邻奇A核的结构特征类似,这种跃迁电四极矩的差异很可能是由于1/2-[541]准质子或1/2-[521]准中子对原子核的形状驱动效应造成的。By analyzing carefully the in-beam 7 spectroscopy data of odd-odd 174Re, we have extracted the branching ratios of the interband and intraband E2 7 transitions from the two rotational bands of different configurations in 174Re. The ratios of the reduced transition probabilities B（E2） have been deduced and an- alyzed using a band mixing theory. Information on the band interaction and deformation have been ob- tained. Apparent differences of transition quadrupole moments are found in the two configurations. A like- ly reason for the differences in the transition quadrupole moments is the shape driving effects of 1/2- [541] quasi-proton or 1/2-[521] quasi-neutron, which has been proposed in the odd-A neighbors of 174Re.

关 键 词：形状驱动效应 尼尔逊能级 跃迁电四极矩 约化跃迁概率 反常带交叉 

分 类 号：O571.23[理学—粒子物理与原子核物理]