Systematic Cranked Shell Model Calculations for $^{87, 89, 91}$Br
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866911538234785792 |
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| author | Salim, Nabeel Narula, Mehak Arumugam, P. |
| author_facet | Salim, Nabeel Narula, Mehak Arumugam, P. |
| contents | A systematic investigation of the odd-mass neutron-rich bromine isotopes $^{87-91}$Br has been carried out within the configuration-constrained cranked shell model (CSM) framework. The calculated kinematic moments of inertia and angular-momentum alignments reproduce the experimental trends with excellent agreement for the proposed quasiparticle configurations, thereby supporting the assigned band structures. The total Routhian surface calculations reveal pronounced $γ$-softness in $^{87}$Br, shape coexistence in $^{89-93}$Br, and a gradual prolate-to-oblate transition approaching $N=56$. These results demonstrate that the CSM provides a reliable description of rotational behavior and shape evolution in this mass region, achieving a better level of accuracy, while offering a transparent interpretation of quasiparticle configurations and shape-driving effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_21985 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Systematic Cranked Shell Model Calculations for $^{87, 89, 91}$Br Salim, Nabeel Narula, Mehak Arumugam, P. Nuclear Theory A systematic investigation of the odd-mass neutron-rich bromine isotopes $^{87-91}$Br has been carried out within the configuration-constrained cranked shell model (CSM) framework. The calculated kinematic moments of inertia and angular-momentum alignments reproduce the experimental trends with excellent agreement for the proposed quasiparticle configurations, thereby supporting the assigned band structures. The total Routhian surface calculations reveal pronounced $γ$-softness in $^{87}$Br, shape coexistence in $^{89-93}$Br, and a gradual prolate-to-oblate transition approaching $N=56$. These results demonstrate that the CSM provides a reliable description of rotational behavior and shape evolution in this mass region, achieving a better level of accuracy, while offering a transparent interpretation of quasiparticle configurations and shape-driving effects. |
| title | Systematic Cranked Shell Model Calculations for $^{87, 89, 91}$Br |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2603.21985 |