Two-Quasiparticle Bands and Isomers in ^98Sr

作     者：李明亮 朱胜江 J.H.Hamilton A.V.Ramayya J.K.Hwang 车兴来 张征 禹英男 郑然成 I.Y.Lee J.O.Rasmussen Y.X.Luo W.C.Ma 

作者机构：DepartmentofPhysicsTsinghuaUniversityBeijing100084 DepartmentofPhysicsVanderbiltUniversityNashvilleTennessee37235USA LawrenceBerkeleyNationalLaboratory BerkeleyCalifornia94720USA DepartmentofPhysicsMississippiStateUniversityMississippi39762USA 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2004年第21卷第11期

页      面：2147-2150页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：国家973计划 国家自然科学基金 国家教育部高等学校专项基金 美国能源部(DOE)项目 

主　　题：Isomers 

摘      要：Rotational bands in neutron-rich 98Sr nucleus have been investigated by measuring high-fold prompt γ-ray coincidence events of the spontaneous fission of 252Cf with the Gammasphere detector array. A deformed K = 3 band built on the 1838keV level has been confirmed and extended. Another deformed K = 6 band based on the 2535keV level has been established. Both the bands originate most probably from the ν9/2[404]⊗ν3/2[411] two-quasiparticle configuration with Ω = |Ω1−Ω2| and Ω = |Ω1+Ω2|, respectively. Based on the delay-coincidence measurements, the half-lives for the K = 3 and K = 6 band head levels have been obtained to be 13±3ns and 4.5±1.0ns, respectively.