Role of octupole shape degree of freedom in neutron-rich odd-mass xenon isotopes
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866915047393984512 |
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| author | Nomura, K. |
| author_facet | Nomura, K. |
| contents | Influences of the octupole shape degree of freedom on low-energy spectra of neutron-rich odd-mass xenon isotopes are studied within the interacting boson-fermion model that is based on the nuclear density functional theory. The interacting-boson Hamiltonian describing low-energy quadrupole and octupole collective states of the even-even nuclei $^{140,142,144}$Xe, single-particle energies, and occupation probabilities for an unpaired neutron in the odd-mass nuclei $^{141,143,145}$Xe, are determined based on the axially symmetric quadrupole-octupole deformation-constrained self-consistent mean-field calculations with a choice of the energy density functional and pairing interaction. Strength parameters of the boson-fermion interactions are empirically determined to reproduce a few low-lying levels of each odd-mass nucleus. The mean-field calculation predicts for $^{142}$Xe a potential energy surface that is notably soft in the octupole deformation with a non-zero octupole global minimum. The octupole correlations are shown to be relevant in positive-parity excited states of $^{143,145}$Xe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_01262 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Role of octupole shape degree of freedom in neutron-rich odd-mass xenon isotopes Nomura, K. Nuclear Theory Nuclear Experiment Influences of the octupole shape degree of freedom on low-energy spectra of neutron-rich odd-mass xenon isotopes are studied within the interacting boson-fermion model that is based on the nuclear density functional theory. The interacting-boson Hamiltonian describing low-energy quadrupole and octupole collective states of the even-even nuclei $^{140,142,144}$Xe, single-particle energies, and occupation probabilities for an unpaired neutron in the odd-mass nuclei $^{141,143,145}$Xe, are determined based on the axially symmetric quadrupole-octupole deformation-constrained self-consistent mean-field calculations with a choice of the energy density functional and pairing interaction. Strength parameters of the boson-fermion interactions are empirically determined to reproduce a few low-lying levels of each odd-mass nucleus. The mean-field calculation predicts for $^{142}$Xe a potential energy surface that is notably soft in the octupole deformation with a non-zero octupole global minimum. The octupole correlations are shown to be relevant in positive-parity excited states of $^{143,145}$Xe. |
| title | Role of octupole shape degree of freedom in neutron-rich odd-mass xenon isotopes |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2411.01262 |