| Original Articles |
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High-Spin States in the Odd-Proton Nucleus135Pm |
| WENG Pei-Kun;YUAN Guan-Jun;ZHANG Zhan-Jun;LI Sheng-Gang;WEN Shu-Xian;LI Guang-Sheng;DAI Zheng-Yu;YANG Chun-Xiang;PENG Zhao-Hua;LIU Xiang-An;WU Xiao-Guang;PU Yun-Wei,
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| China Institute of Atomic Energy, Beijing 102413 |
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| Cite this article: |
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WENG Pei-Kun, YUAN Guan-Jun, ZHANG Zhan-Jun et al 2001 Chin. Phys. Lett. 18 30-32 |
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Abstract High-spin states in the odd-proton nucleus 135Pm have been investigated using the 107Ag(32S, 2p2n)135Pm reaction. Seven rotational bands have been observed in 135Pm. The yrast band based on a decoupled h11/2 proton is found to have a band crossing ωc ～ 0.43MeV/ħ. Two positive-parity bands based on the two signature components of the πg7/25/2+[413] Nilsson orbital have been observed in the main sidebands. The favoured band with (π,α)=(+,-1/2) has been shown to populate below the first pair of proton alignment. Both bands have shown upbend at ω1 ～ 0.26 MeV/ħ and ω2 ～ 0.43 MeV/ħ. These crossing frequencies can be attributed to the decoupling of the first pair of H11/2 quasi-proton and H11/2 quasi-neutron, respectively. Four weaker bands have been observed in sidebands too. Among them, two states are possibly built on a πd5/23/2+[411]configuration.
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| Keywords:
23.20.Lv
25.70.-z
27.60.+j
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Published: 01 January 2001
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| PACS: |
23.20.Lv
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(γ-transitions and level energies)
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25.70.-z
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(Low and intermediate energy heavy-ion reactions)
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27.60.+j
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(90 ≤ A ≤ 149)
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