Chin. Phys. Lett.  2016, Vol. 33 Issue (10): 102102    DOI: 10.1088/0256-307X/33/10/102102
NUCLEAR PHYSICS |
Coexistence of Prolate and Oblate Shapes in $^{98}$Sr Nuclei Using IBM2
Da-Li Zhang**, Cheng-Fu Mu
Department of physics, Huzhou University, Huzhou 313000
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Da-Li Zhang, Cheng-Fu Mu 2016 Chin. Phys. Lett. 33 102102
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Abstract The properties of the low-lying states and the shape coexistence in $^{98}$Sr are investigated within the framework of the proton–neutron interacting boson model (IBM2). By considering the relative energy of the $d$ proton boson to be different from that of the neutron boson, it is found that the calculated energy levels and the $B(E2)$ transition strengths agree with the experimental data perfectly. Particularly, the second 0$^+$ state, which is associated with the shape coexistence phenomenon and has the lowest energy $E(0^+_2)$ among all known even–even nuclei, is reproduced very well. The behavior of the calculated quadrupole shape invariants is consistent with the experimental results.
Received: 25 June 2016      Published: 27 October 2016
PACS:  21.10.Re (Collective levels)  
  21.60.Fw (Models based on group theory)  
  27.60.+j (90 ≤ A ≤ 149)  
Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11475062, 11547312 and 11147148.
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https://cpl.iphy.ac.cn/10.1088/0256-307X/33/10/102102       OR      https://cpl.iphy.ac.cn/Y2016/V33/I10/102102
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Da-Li Zhang
Cheng-Fu Mu
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