Fragmentation of the IAR along the chains $ \boldsymbol{N=50} $ and $ \boldsymbol{Z=50} $
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866911634008571904 |
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| author | Durel, David Péru, Sophie Martini, Marco |
| author_facet | Durel, David Péru, Sophie Martini, Marco |
| contents | We study Isobaric Analog Resonances in even-even nuclei along the $ N=50 $ isotonic chain. First, Hartree-Fock-Bogoliubov calculations, using the Gogny D1M effective interaction, have been performed to provide energies and occupation probabilities of nucleon orbitals. The Isobaric Analog Resonances are calculated with the charge exchange QRPA approach on top of then HFB calculations. Fermi transition mechanism is interpreted with the existence of collective modes in the final nucleus. The fragmentation of the Fermi Strength results from the fractional occupation of nucleon shells, a direct consequence of nuclear pairing. The theoretical Fermi transition probabilities along the isotopic chain $ Z=50 $ are also analyzed and confirm our conclusions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_14643 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fragmentation of the IAR along the chains $ \boldsymbol{N=50} $ and $ \boldsymbol{Z=50} $ Durel, David Péru, Sophie Martini, Marco Nuclear Theory We study Isobaric Analog Resonances in even-even nuclei along the $ N=50 $ isotonic chain. First, Hartree-Fock-Bogoliubov calculations, using the Gogny D1M effective interaction, have been performed to provide energies and occupation probabilities of nucleon orbitals. The Isobaric Analog Resonances are calculated with the charge exchange QRPA approach on top of then HFB calculations. Fermi transition mechanism is interpreted with the existence of collective modes in the final nucleus. The fragmentation of the Fermi Strength results from the fractional occupation of nucleon shells, a direct consequence of nuclear pairing. The theoretical Fermi transition probabilities along the isotopic chain $ Z=50 $ are also analyzed and confirm our conclusions. |
| title | Fragmentation of the IAR along the chains $ \boldsymbol{N=50} $ and $ \boldsymbol{Z=50} $ |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2508.14643 |