Shape coexistence in Ne isotopes and hyperon impurity effect on low-lying states
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866917729652441088 |
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| author | Xue, Huai-Tong Cui, Ji-Wei Chen, Q. B. Zhou, Xian-Rong Sagawa, Hiroyuki |
| author_facet | Xue, Huai-Tong Cui, Ji-Wei Chen, Q. B. Zhou, Xian-Rong Sagawa, Hiroyuki |
| contents | Based on the beyond-mean-field Skyrme-Hartree-Fock model, we investigate the shape coexistence in Ne isotopes and the effect of $\la$ hyperon on the energy level structure in the nuclei. The up-to-date Skyrme-type $N\la$ interaction SLL4 and the $NN$ interaction SGII are employed. Low-lying energy spectra of $^{20,22,24,26,28,30,32,34}$Ne, including the low-lying states with $J\leq 6$, are predicted, discussed in detail, and found in good agreement with experimental results. The electric quadrupole transition rate is also examined. The coexistences of a ground state rotational band and a $\be$ vibrational band are revealed in $^{20,22,24}$Ne. Unlike the previously discovered shrinkage effect of $\la_{s}$ on the ground state nuclei, it is found that the $\la_{s}$ may alter the excitation mode of the second band by affecting the distribution of the collective wave function, thereby causing the $\be$ vibrational band transitions to a vibrational band with equidistant energy levels. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15048 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Shape coexistence in Ne isotopes and hyperon impurity effect on low-lying states Xue, Huai-Tong Cui, Ji-Wei Chen, Q. B. Zhou, Xian-Rong Sagawa, Hiroyuki Nuclear Theory Based on the beyond-mean-field Skyrme-Hartree-Fock model, we investigate the shape coexistence in Ne isotopes and the effect of $\la$ hyperon on the energy level structure in the nuclei. The up-to-date Skyrme-type $N\la$ interaction SLL4 and the $NN$ interaction SGII are employed. Low-lying energy spectra of $^{20,22,24,26,28,30,32,34}$Ne, including the low-lying states with $J\leq 6$, are predicted, discussed in detail, and found in good agreement with experimental results. The electric quadrupole transition rate is also examined. The coexistences of a ground state rotational band and a $\be$ vibrational band are revealed in $^{20,22,24}$Ne. Unlike the previously discovered shrinkage effect of $\la_{s}$ on the ground state nuclei, it is found that the $\la_{s}$ may alter the excitation mode of the second band by affecting the distribution of the collective wave function, thereby causing the $\be$ vibrational band transitions to a vibrational band with equidistant energy levels. |
| title | Shape coexistence in Ne isotopes and hyperon impurity effect on low-lying states |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2407.15048 |