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Chinese Physics C> 2016, Vol. 40> Issue(12) : 124001 DOI: 10.1088/1674-1137/40/12/124001

Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs

  • 1.

      College of Physics, Jilin University, Changchun 130012, China

  • 2.

      Research Facility Center for Pure and Applied Science, University of Tsukuba, Ibaraki 305-8577, Japan

  • Excited states in the odd-proton nucleus 125Cs were investigated by means of in-beam γ-ray spectroscopy. The πg7/2 band is observed to fork into a ΔI=1 coupled band and a ΔI=2 decoupled band at high spins. To assign the possible configurations of these two bands, experimental B(M1)/B(E2) ratios and signature splittings have been evaluated for the ΔI=1 band, and calculations based on the geometrical model, cranked shell model and total Routhian surfaces model have been performed. They are suggested to be a near-oblate band built on the (πg7/2/d5/2)⊗(νh11/2)2 configuration and a prolate band built on the πg7/2⊗(π h11/2)2 configuration, respectively.
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Ji Sun, Tetsuro Komatsubara, Jia-Qi Wang, Hao Guo, Xue-Yuan Hu, Ying-Jun Ma, Yun-Zuo Liu and Kohei Furuno. Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs[J]. Chinese Physics C, 2016, 40(12): 124001. doi: 10.1088/1674-1137/40/12/124001
Ji Sun, Tetsuro Komatsubara, Jia-Qi Wang, Hao Guo, Xue-Yuan Hu, Ying-Jun Ma, Yun-Zuo Liu and Kohei Furuno. Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs[J]. Chinese Physics C, 2016, 40(12): 124001.  doi: 10.1088/1674-1137/40/12/124001 shu
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Received: 2016-08-19
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    Supported in part by National Natural Science Foundation of China (11475072)

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Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs

    Corresponding author: Ying-Jun Ma, myj@jlu.edu.cn
  • 1.  College of Physics, Jilin University, Changchun 130012, China
  • 2.  Research Facility Center for Pure and Applied Science, University of Tsukuba, Ibaraki 305-8577, Japan
  • Received Date: 2016-08-19
  • Available Online: 2016-12-05
Fund Project:  Supported in part by National Natural Science Foundation of China (11475072)

Abstract: Excited states in the odd-proton nucleus 125Cs were investigated by means of in-beam γ-ray spectroscopy. The πg7/2 band is observed to fork into a ΔI=1 coupled band and a ΔI=2 decoupled band at high spins. To assign the possible configurations of these two bands, experimental B(M1)/B(E2) ratios and signature splittings have been evaluated for the ΔI=1 band, and calculations based on the geometrical model, cranked shell model and total Routhian surfaces model have been performed. They are suggested to be a near-oblate band built on the (πg7/2/d5/2)⊗(νh11/2)2 configuration and a prolate band built on the πg7/2⊗(π h11/2)2 configuration, respectively.

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