Negative Parity Bands and Signature Splitting Inversion in ^80Rb |
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作者姓名: | 袁观俊 杨春祥 王月 张振龙 孟锐 M.Oshima Y.Toh A.Osa M.Koizumi Y.Hatsukawa M.Matsuda T.Hagakawa M.M.Ndontcheng 温书贤 贺创业 竺礼华 王治民 李广生 马瑞刚 吴晓光 |
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作者单位: | [1]DepartmentofPhysics,JinlinUniversity,Changchun130023 [2]JapanAtomicEnergyResearchInstitute,Tokai,Japan [3]DepartmentofPhysics,UniversityofDouala,Douala,Cameroun [4]ChinaInstituteofAtomicEnergy,Beijing102413 |
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摘 要: | High spin states in ^80Rb were studied via the ^65Cu ^19F, ^66Zn ^180 and ^68Zn ^160 reactions. The 75-MeV ^19F,76-MeV ^180 and 80-MeV ^160 beams were provided by the CIAE HI-13 Tandem accelerator and the JAERI Tandem accelerator. The prompt γ-γ coincidence and the directional correlation from oriented nuclei (DCO)were measured by the detector arrays in CIAE and JAERI. Twenty-three new states with 28 new transitionshave been assigned to ^80Rb. The states were observed up to spins of 20^ and 22^- in the α= 0 branch for thepositive and negative parity yrast bands respectively. The negative parity non-yrast bands were significantlyextended up to spins of 22^- and 15^-. The band crossings with frequencies 0.51 MeV and 0.61 MeV in the α= 0cascade were observed for the first time. The signature splitting was observed in both negative parity bands. Thesignature inversions at spins of about 7h and 15h were observed.
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关 键 词: | 负宇称带 ^80Rb 铷原子 高自旋态 原子核物理学 分裂 反转 |
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