形变双奇核^(186)Au的高自旋态能级结构  

High-spin level structure in deformed odd-odd ^(186)Au

作　　者：李仕成[1,2] 张玉虎[1] 周小红[1] 石跃[3] 柳敏良[1] 方永得[1] 王建国[1] 高丙水[1,2] 许甫荣[3] OSHIMA M TOH Y KOIZUMI M OSA A KIMURA A HATSUKAWA Y HAYAKAWA H SHIZUMA T KATAKURA J MATSUDA M MORIKAWA T SUGAWARA M KUSAKARI H 

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]北京大学物理学院,核物理与核技术国家重点实验室,北京100871 [4]Japan Atomic Energy Agency,Tokai-Mura,Ibaraki 319-1195,Japan [5]Department of Physics,Kyushu University,Fukuoka 812-81,Japan [6]Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan [7]Chiba University,Inage-ku,Chiba 263-8512,Japan

出　　处：《中国科学：物理学、力学、天文学》2012年第10期1062-1075,共14页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:10905075;10825522;10735010;10975006);国家重点基础研究发展计划(编号:2007CB815005);中国科学院基金资助项目

摘　　要：利用重离融合蒸发反应和在束γ谱学验方法,研究了双奇核186Au的高旋态能级结构.扩展了186Au核基于πh9/2i13/2和πi13/2i13/22-准粒组态的转动带能级纲图,并重新指认了两条转动带的能级旋值,发现两条转动带在低旋区均出现旋称反转.系统地分析了Au同位素双奇核πh9/2i13/2,πi13/2i1/3和πh-111/2-νi-1312转动带的旋称劈裂特征.本工对186Au核πh-111/-2νi-132/2j(j=p3/2,f5/2)转动带(17+)态之上能级结构了修改.根据验提取的准粒顺排角动量以及对Au双奇核带结构的系统性比较和分析,别出了一条组态为πh-111/-2νi-1322h-19/2的扁椭球转动带.High-spin states in deformed odd-odd 186Au have been reinvestigated via the 172yb（19F, 5n？） fusion-evaporation reaction. Detailed analysis of y-y coincidence relationships leads to a revised high-spin level scheme for 186Au. New spin values are assigned to the prolate 7h9/2vi13/2 and il3/2vi13/2 bands in 186Au according to the level spacing systematics as well as the existing knowledge in odd-odd neighboring nuclei. Based on the new spin assignments, both bands exhibit the characteristics of low-spin signature inversion. The properties of signature splitting for the prolate rth9/2vil3/2 and 7ti13/2vi13/2 and oblate 7t/q/2 vi2 bands in Au isotopes have been discussed. A new rotational band built on/~=（20＋） state has been identified and assigned as the oblate 7tk/2 vit32hg-/12 configuration

关 键 词：高旋态 能级间隔系统性 旋称反转 准粒顺排 

分 类 号：O571.2[理学—粒子物理与原子核物理]