High-spin states of ^(125)Sb:Particle-core excitation coupling  

作　　者：刘忠 张玉虎 马英君 Y.Sasaki K.Yamada H.Oshima H.Yokose M.Ishizuka T.Komatsubara K.Furuno 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki 305-0006,Japan

出　　处：《Science China(Physics,Mechanics & Astronomy)》2003年第4期390-397,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.19705011,10025525);Major State Research Development Program(Grant No.G2000077400);the Chinese Academy of Sciences and JSPS Invitation Fellowship(Grant No.L00515)

摘　　要：Excited states of125Sb have been studied using in-beam γ spectroscopy techniques via the124Sn(7Li, α2n) reaction at a beam energy of 32 MeV. A high-spin level scheme including 21 new γ-transitions and 14 new excited states have been established. Three isomers have been identified at 1970, 2110 and 2471 keV and the ranges of their half-lives have been estimated from the delayed coincidence data. The level structure of125Sb is discussed in terms of particle-core excitation coupling. With the help of empirical shell model calculations the three isomers are proposed to have three-quasiparticle πg7/2?v(h 11/2 s 1/2)5?, πg7/2?v(h 11/2 d 3/2)7? and πg7/2?v(h 11 2/2 )10 + configurations, respectively.Excited states of 125Sb have been studied using in-beam γspectroscopy techniques via the 124Sn(7Li, α2n) reaction at a beam energy of 32 MeV. A high-spin level scheme including 21 new γ-transitions and 14 new excited states have been established. Three isomers have been identified at 1970, 2110 and 2471 keV and the ranges of their half-lives have been estimated from the delayed coincidence data. The level structure of 125Sb is discussed in terms of particle-core excitation coupling. With the help of empirical shell model calculations the three isomers are proposed to have three-quasiparticle πg7/2(*)V(h11/2s1/2)5-,πg7/2(*)V(h11/2d3/2)7-and πg7/2(*)V(h211/2)10+configurations, respectively.

关 键 词：in-beam γ spectroscopy ISOMER particle-core coupling 

分 类 号：O571[理学—粒子物理与原子核物理]