Structure of the Semi-decoupled π 1/2411 Band in Odd Proton Nucleus 169Ta
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SONG Hai,
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YANG Chun-Xiang,
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SUN Hui-Bin,
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DENG Fu-Guo,
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WU Xiao-Guang,
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LU Jing-Bin,
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ZHAO Guang-Yi,
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HAN Guang-Bing,
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PENG Chao-Hua,
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YIN Li-Chang,
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WEN Shu-Xian,
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LI Guang-Sheng,
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YUAN Guan-Jun,
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LIU Yun-Zuo,
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ZHU Li-Hua,
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SHAO Li-Qin,
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ZHOU Hong-Yu
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Abstract
High spin states of the odd proton-nucleus 169Ta have been populated in the reaction 155Gd(19F, 5n) with beam energies of 97 MeV. Rotational band based on d3/2 proton 1/2411 Nilsson state has been pushed up to 39/2+ in the α = 1/2 decay sequence. Its signature partner, the α = -1/2 decay sequence with four link transitions has been established and 1/2411 band in 169Ta was reassigned to be a semi-decoupled band. The systematics of the signature splitting in the K = 1/2 bands in the rear-earth region and the accidental degeneracy conclusion given by the angular projection shell model were discussed.
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