Effective proton-neutron interaction in mirror nuclei
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866915179872124928 |
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| author | Xing, Y. M. Luo, Y. F. Li, K. H. Zhang, Y. H. Li, J. G. Wang, M. Litvinov, Yu. A. Blaum, K. Yan, X. L. Liao, T. Zhang, M. Zhou, X. |
| author_facet | Xing, Y. M. Luo, Y. F. Li, K. H. Zhang, Y. H. Li, J. G. Wang, M. Litvinov, Yu. A. Blaum, K. Yan, X. L. Liao, T. Zhang, M. Zhou, X. |
| contents | Effective proton-neutron interactions, $V_{pn}$, in mirror nuclei are systematically analyzed using the ground-state atomic masses. A mirror symmetry of $V_{pn}$ is found for bound nuclei with a standard deviation of $σ=32$ keV. However, this mirror symmetry is apparently broken for some mirror-nuclei pairs when a proton-unbound nucleus is involved in extracting the $V_{pn}$ values. Such a mirror-symmetry breaking is attributed to the Thomas-Ehrman shift of the proton-unbound nucleus and investigated by using the Gamow shell model. It is concluded that the Thomas-Ehrman shift originates mainly from reduced Coulomb energies in the proton-unbound nuclei due to the extended radial density distribution of valence protons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01398 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Effective proton-neutron interaction in mirror nuclei Xing, Y. M. Luo, Y. F. Li, K. H. Zhang, Y. H. Li, J. G. Wang, M. Litvinov, Yu. A. Blaum, K. Yan, X. L. Liao, T. Zhang, M. Zhou, X. Nuclear Theory Nuclear Experiment Effective proton-neutron interactions, $V_{pn}$, in mirror nuclei are systematically analyzed using the ground-state atomic masses. A mirror symmetry of $V_{pn}$ is found for bound nuclei with a standard deviation of $σ=32$ keV. However, this mirror symmetry is apparently broken for some mirror-nuclei pairs when a proton-unbound nucleus is involved in extracting the $V_{pn}$ values. Such a mirror-symmetry breaking is attributed to the Thomas-Ehrman shift of the proton-unbound nucleus and investigated by using the Gamow shell model. It is concluded that the Thomas-Ehrman shift originates mainly from reduced Coulomb energies in the proton-unbound nuclei due to the extended radial density distribution of valence protons. |
| title | Effective proton-neutron interaction in mirror nuclei |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2503.01398 |