Shape coexistence close to N=50 in the neutron-rich isotope 80Ge investigated by IBM-2

  • The properties of the low-lying states, especially the relevant shape coexistence in 80Ge, close to one of most neutron-rich doubly magic nuclei at N=50 and Z=28, have been investigated within the framework of the proton-neutron interacting model (IBM-2). Based on the fact that the relative energy of the d neutron boson is different from that of the proton boson, the calculated energy levels of low-lying states and E2 transition strengths can reproduce the experimental data very well. Particularly, the first excited state 0+2, which is intimately related to the shape coexistence phenomenon, is reproduced quite nicely. The ρ2(E2, 02+→01+) transition strength is also predicted. The experimental data and theoretical results indicate that both collective spherical and γ-soft vibration structures coexist in 80Ge.
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Da-Li Zhang and Cheng-Fu Mu. Shape coexistence close to N=50 in the neutron-rich isotope 80Ge investigated by IBM-2[J]. Chinese Physics C, 2018, 42(3): 034101. doi: 10.1088/1674-1137/42/3/034101
Da-Li Zhang and Cheng-Fu Mu. Shape coexistence close to N=50 in the neutron-rich isotope 80Ge investigated by IBM-2[J]. Chinese Physics C, 2018, 42(3): 034101.  doi: 10.1088/1674-1137/42/3/034101 shu
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Received: 2017-10-23
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    Supported by National Natural Science Foundation of China (11475062, 11647306, 11147148)

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Shape coexistence close to N=50 in the neutron-rich isotope 80Ge investigated by IBM-2

    Corresponding author: Da-Li Zhang,
    Corresponding author: Cheng-Fu Mu,
  • 1. Department of Physics, Huzhou University, Huzhou 313000, China
Fund Project:  Supported by National Natural Science Foundation of China (11475062, 11647306, 11147148)

Abstract: The properties of the low-lying states, especially the relevant shape coexistence in 80Ge, close to one of most neutron-rich doubly magic nuclei at N=50 and Z=28, have been investigated within the framework of the proton-neutron interacting model (IBM-2). Based on the fact that the relative energy of the d neutron boson is different from that of the proton boson, the calculated energy levels of low-lying states and E2 transition strengths can reproduce the experimental data very well. Particularly, the first excited state 0+2, which is intimately related to the shape coexistence phenomenon, is reproduced quite nicely. The ρ2(E2, 02+→01+) transition strength is also predicted. The experimental data and theoretical results indicate that both collective spherical and γ-soft vibration structures coexist in 80Ge.

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