| Observation of signature inversion in the πh9/2(×)νi13/2 oblate band |
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| 基金项目： | 中国科学院资助项目，the Major State Basic Research Development Program of China，中国科学院及上海市科委纳米联合专项 |
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| 摘 要： |
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Observation of signature inversion in the πh9/2(×)νi13/2 oblate band |
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| XIE Chengying,ZHOU Xiaohong,ZHANG Yuhu,GUO Yingxiang,LEI Xiangguo,ZHENG Yong,LIU Minliang,SONG Litao,WANG Hualei,YU Haiping,GUO Wentao,LUO Peng,WU Zhijun,ZHU Lihua,WU Xiaoguang. Observation of signature inversion in the πh9/2(×)νi13/2 oblate band[J]. Science in China(Physics Astronomy), 2005, 48(4) |
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| Authors: | XIE Chengying ZHOU Xiaohong ZHANG Yuhu GUO Yingxiang LEI Xiangguo ZHENG Yong LIU Minliang SONG Litao WANG Hualei YU Haiping GUO Wentao LUO Peng WU Zhijun ZHU Lihua WU Xiaoguang |
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| Abstract: | High-spin states in 190Tl have been studied via the 160Gd(35Cl, 5nγ) reaction. The level scheme, consisting of the πh9/2(×)νi13/2 oblate band and a cascade with character of single particle excitations, has been established. Spin values have been firmly assigned to the oblate band in 190Tl, resulting in low-spin signature inversion in the πh9/2(×)νi13/2 oblate band for the first time. Based on the similarity of the level structure in doubly odd Tl nuclei, spin values for the oblate bands in 192―200Tl should be re-assigned, and a consistent low-spin signature inversion has occurred in these oblate deformed nuclei. The low-spin signature inversion phenomena can be interpreted qualitatively by using the 2-quasiparticle plus rotor model including p-n residual interactions. |
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| Keywords: | deformed odd-odd 190Tl oblate rotational bands signature inversion 2-qp+rotor model |
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