Collective states and shape competition in 126Te

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Liu-Chun He, Yun Zheng, Li-Hua Zhu, Hai-Liang Ma, Xiao-Guang Wu, Chuang-Ye He, Guang-Sheng Li, Lie-Lin Wang, Xin Hao, Ying Liu, Xue-Qin Li, Bo Pan, Zhong-Yu Li and Huai-Bo Ding. Collective states and shape competition in 126Te[J]. Chinese Physics C, 2017, 41(4): 044003. doi: 10.1088/1674-1137/41/4/044003
Liu-Chun He, Yun Zheng, Li-Hua Zhu, Hai-Liang Ma, Xiao-Guang Wu, Chuang-Ye He, Guang-Sheng Li, Lie-Lin Wang, Xin Hao, Ying Liu, Xue-Qin Li, Bo Pan, Zhong-Yu Li and Huai-Bo Ding. Collective states and shape competition in 126Te[J]. Chinese Physics C, 2017, 41(4): 044003.  doi: 10.1088/1674-1137/41/4/044003 shu
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Received: 2016-10-17
Revised: 2016-12-07
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    Supported by National Natural Science Foundation of China (11575018, 11375023, 11305269, 11375267, 11405274, 11205245, 10927507, 10975191, 11075214, 11175259, 11205068)

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Collective states and shape competition in 126Te

    Corresponding author: Yun Zheng,
    Corresponding author: Li-Hua Zhu,
  • 1.  School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
  • 2.  China Institute of Atomic Energy, Beijing 102413, China
  • 3. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
  • 4. Faculty of Science, Shenzhen University, Shenzhen 518060, China
  • 5. China Institute of Atomic Energy, Beijing 102413, China
  • 6. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Mianyang 621010, China
  • 7.  School of Physics, Peking University, Beijing 100871, China
  • 8.  Department of Physics, Tsinghua University, Beijing 100084, China
Fund Project:  Supported by National Natural Science Foundation of China (11575018, 11375023, 11305269, 11375267, 11405274, 11205245, 10927507, 10975191, 11075214, 11175259, 11205068)

Abstract: High-spin states in 126Te have been investigated by using in-beam γ ray spectroscopy with the 124Sn(7Li, 1p4n)126Te reaction at a beam energy of 48 MeV. The previously known level scheme has been enriched, and a new negative-parity sequence has been established. The yrast positive-parity band shows a shape change between triaxial shape and collective oblate shape as a function of spin. In particular, three competitive minima appear in the potential energy surface for the Iπ=8+ states, with one aligned state at γ=-120° and two triaxial states at γ~30° and -45°, respectively. The signature splitting behavior of the negative-parity band is discussed. The shape change with increasing angular momentum and the signature splitting can be interpreted well in terms of the Cranked Nilsson-Strutinsky-Bogoliubov and Cranked Nilsson-Strutinsky model calculations.

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