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| Auteurs principaux: | , , , |
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| Format: | Preprint |
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2025
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| Accès en ligne: | https://arxiv.org/abs/2510.08772 |
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| _version_ | 1866908585590521856 |
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| author | Saito, Yukiya Ravlić, Ante Nalamwar, Pranav Surman, Rebecca |
| author_facet | Saito, Yukiya Ravlić, Ante Nalamwar, Pranav Surman, Rebecca |
| contents | $β$-decay is known to play an essential role in the rapid neutron capture process ($r$-process) during $(n, γ) \leftrightarrow (γ, n)$ equilibrium and freeze-out when the neutron-rich nuclei decay back to stability. Recent systematic theoretical studies on $β$-decay at finite temperature indicated that under hot conditions ($T\sim10$~GK), a significant acceleration of $β$-decay rates is expected, especially for nuclei near stability. This corresponds to the early stage of the $r$-process. In this study, we investigate the effect of the $β$-decays in finite temperature using the rates calculated with the finite-temperature proton-neutron relativistic quasiparticle random-phase approximation (FT-PNRQRPA). We explore a variety of astrophysical conditions and find that the effect on the abundance pattern is significant in hot and moderately neutron-rich conditions such as are expected in magnetorotational supernovae. Accelerated $β$-decay rates also increase the heating rate in the early phase, resulting in an additional modification of the final abundance pattern. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_08772 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Effect of Finite-Temperature $β$-Decay Rates on the Rapid Neutron Capture Process Saito, Yukiya Ravlić, Ante Nalamwar, Pranav Surman, Rebecca Nuclear Theory High Energy Astrophysical Phenomena $β$-decay is known to play an essential role in the rapid neutron capture process ($r$-process) during $(n, γ) \leftrightarrow (γ, n)$ equilibrium and freeze-out when the neutron-rich nuclei decay back to stability. Recent systematic theoretical studies on $β$-decay at finite temperature indicated that under hot conditions ($T\sim10$~GK), a significant acceleration of $β$-decay rates is expected, especially for nuclei near stability. This corresponds to the early stage of the $r$-process. In this study, we investigate the effect of the $β$-decays in finite temperature using the rates calculated with the finite-temperature proton-neutron relativistic quasiparticle random-phase approximation (FT-PNRQRPA). We explore a variety of astrophysical conditions and find that the effect on the abundance pattern is significant in hot and moderately neutron-rich conditions such as are expected in magnetorotational supernovae. Accelerated $β$-decay rates also increase the heating rate in the early phase, resulting in an additional modification of the final abundance pattern. |
| title | Effect of Finite-Temperature $β$-Decay Rates on the Rapid Neutron Capture Process |
| topic | Nuclear Theory High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2510.08772 |