摘要
利用^(150)Nd(^(28)Si,5n)熔合蒸发反应居了^(173)W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173Wγ1/2^(-)[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 ^(173)W 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 theγ7/2^(+)[633],γ5/2^(-)[512],andγ1/2^(-)[521]configurations are extended significantly,and the unfavored signature branch of theγ1/2^(-)[521]band is established for the first time.Low-spin signature inversion is observed in theγ5/2^(-)[512]band.Similar behavior of the signature splitting indicates that the abnormal splitting in theπ1/2^(-)[541]γ5/2^(-)[512]band of 174Re comes from the neutron at the 5/2^(-)[512]orbit.Such signature inversion mechanism needs further investigation.
作者
王海霞
张玉虎
周小红
柳敏良
丁兵
周厚兵
李广顺
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
WANG HaiXia;ZHANG YuHu;ZHOU XiaoHong;LIU MinLiang;DING Bing;ZHOU HouBing;LI GuangShun;OSHIMA M;KOIZUMI M;TOH Y;KIMURA A;HARADA H;FURUTAKA K;KITATANI F;NAKAMURA S;HATSUKAWA Y;OHTA M;HARA K;KIN T;MENG Jie(Institute of Modem Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Graduate School of Chinese Academy of Sciences,Beijing 100049,China;Japan Atomic Energy Agency,Tokai—Mura,Ibaraki 319—1195,Japan;School of Physics,Peking University,Beijing 100871,China)
出处
《中国科学:物理学、力学、天文学》
CSCD
北大核心
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
关键词
173W
转动带
旋称反转
^(173)W
rotational bands
signature inversion
