Shape coexistence close to \(N=50\) in the neutron-rich isotope \(^{80}\)Ge investigated by IBM-2

The properties of the low-lying states, especially the relevant shape coexistence in \(^{80}\)Ge 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 rela...

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Bibliographic Details
Published in:arXiv.org 2018-01
Main Authors: Zhang, Dali, Mu, Chengfu
Format: Article
Language:English
Subjects:
Bosons
Energy levels
Nuclei (nuclear physics)
Online Access:Get full text
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Summary:The properties of the low-lying states, especially the relevant shape coexistence in \(^{80}\)Ge 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 proton bosons', the calculated energy levels of low-lying states, \(E2\) transition strengths can reproduce the experimental data very well. Particularly, the first excited state 0\(^+_2\) is reproduced quite nicely, which is intimately related with the shape coexistence phenomenon. And the \(\rho^2(E0, 0^+_2\rightarrow0^+_1)\) transition strength has been predicted. The experimental data and theoretical results indicate that both collective spherical and \(\gamma\)-soft vibration structures coexist in \(^{80}\)Ge. Key words: \(^{80}\)Ge, low-lying states, \(E0\) transition strengths, shape coexistence, IBM-2.
ISSN:2331-8422
DOI:10.48550/arxiv.1801.00579