Understanding Xe isotopes near $A=130$ through the prolate-oblate shape phase transition
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866912756348747776 |
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| author | Teng, Wei Wang, Sheng-Nan Zhang, Yu |
| author_facet | Teng, Wei Wang, Sheng-Nan Zhang, Yu |
| contents | A simple algebraic scheme incorporating the prolate-oblate shape phase transition (SPT) is proposed within the framework of the interacting boson model to describe the quadrupole deformation features of Xe isotopes near $A=130$. The analysis demonstrates that novel $γ$-soft modes, characterized by the unusual quadrupole moments $Q(2_1^+)<0$ and $0<Q(2_2^+)\ll |Q(2_1^+)|$, can emerge near the critical point of this SPT. This finding is further applied to interpret the properties of low-lying states in the relevant Xe nuclei, particularly the experimentally observed nearly vanishing spectroscopic quadrupole moment $Q(2_2^+)$, thereby offering new insights into the structure of a $γ$-soft deformed nucleus. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09265 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Understanding Xe isotopes near $A=130$ through the prolate-oblate shape phase transition Teng, Wei Wang, Sheng-Nan Zhang, Yu Nuclear Theory A simple algebraic scheme incorporating the prolate-oblate shape phase transition (SPT) is proposed within the framework of the interacting boson model to describe the quadrupole deformation features of Xe isotopes near $A=130$. The analysis demonstrates that novel $γ$-soft modes, characterized by the unusual quadrupole moments $Q(2_1^+)<0$ and $0<Q(2_2^+)\ll |Q(2_1^+)|$, can emerge near the critical point of this SPT. This finding is further applied to interpret the properties of low-lying states in the relevant Xe nuclei, particularly the experimentally observed nearly vanishing spectroscopic quadrupole moment $Q(2_2^+)$, thereby offering new insights into the structure of a $γ$-soft deformed nucleus. |
| title | Understanding Xe isotopes near $A=130$ through the prolate-oblate shape phase transition |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2512.09265 |