NUCLEAR PHYSICS |
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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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Cite this article: |
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.
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Received: 25 June 2016
Published: 27 October 2016
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Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11475062, 11547312 and 11147148. |
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