^(179)Pt转动带性质的研究  

Study of Collective Rotational Bands in ^(179)Pt

作　　者：徐岩冰[1] 周小红[1] 宋立涛[1] 郭应祥[1] 孙志宇[1] M.Oshima T.Toh A.Osa M.Koizumi J.Katakura Y.Hatsukawa M.Matsuda M.Sugawara 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]Japan Atomic Energy Research Institute [3]Chiba Institute of Technology

出　　处：《高能物理与核物理》2004年第6期584-587,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 10 0 0 5 0 12 );国家重点基础研究发展规划项目 (TG2 0 0 0 0 7740 0 )资助~~

摘　　要：利用能量为 16 4— 180MeV的3 5Cl束流 ,通过14 9Sm(3 5Cl,p4n)反应研究了179Pt的高自旋态能级结构 .进行了γ射线的激发函数、X γ和γ γ t符合测量 ,建立了基于 1 2 -[5 2 1],5 2 -[5 12 ]和7 2 + [6 33]组态的 3个转动带 .实验上观测到 1 2 -[5 2 1]带在ω =0 2 7MeV附近顺排角动量突然增大 ,且 7 2 + [6 33]带具有较大的旋称劈裂 .通过比较奇APt同位素和179Pt的同中子素能级结构的系统性 ,对相关现象进行了分析和讨论 .High-spin states in 179Pt have been studied experimentally using the 149Sm( 35Cl, p4n) fusion-evaporation reaction at beam energies of 164—180MeV. Measurements of γ-ray excitation function, X-γ coincidences and γ-γ-t coincidences were carried out with 13 BGO(AC) HPGe and 3 LOAX detectors. Based on the measured results, three rotational bands built on intrinsic states assigned to the 1/2 -[521], 5/2 -[512] and 7/2 +[633] Nilsson configurations have been established for 179Pt. It has been observed that the aligned angular moment in the 1/2 -[521] band increases suddenly around ω=0 27MeV. The big signature splitting has been observed in the 7/2 +[633] band. These phenomena are discussed by referring to the systematics of the level structure in the Pt isotopes and isotones of 179Pt.

关 键 词：铂原子 转动带 旋称劈裂 在束Γ谱学 原子物理学 同位素 

分 类 号：O571[理学—粒子物理与原子核物理]