Constraining the $^{30}$P($p,γ)^{31}$S reaction rate in ONe novae via the weak, low-energy, $β$-delayed proton decay of $^{31}$Cl
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2022
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| author | Budner, T. Friedman, M. Wrede, C. Brown, B. A. José, J. Pérez-Loureiro, D. Sun, L. J. Surbrook, J. Ayyad, Y. Bardayan, D. W. Chae, K. Chen, A. A. Chipps, K. A. Cortesi, M. Glassman, B. Hall, M. R. Janasik, M. Liang, J. O'Malley, P. Pollacco, E. Psaltis, A. Stomps, J. Wheeler, T. |
| author_facet | Budner, T. Friedman, M. Wrede, C. Brown, B. A. José, J. Pérez-Loureiro, D. Sun, L. J. Surbrook, J. Ayyad, Y. Bardayan, D. W. Chae, K. Chen, A. A. Chipps, K. A. Cortesi, M. Glassman, B. Hall, M. R. Janasik, M. Liang, J. O'Malley, P. Pollacco, E. Psaltis, A. Stomps, J. Wheeler, T. |
| contents | The $^{30}$P$(p,γ)^{31}$S reaction plays an important role in understanding nucleosynthesis of $A\geq 30$ nuclides in oxygen-neon novae. The Gaseous Detector with Germanium Tagging was used to measure $^{31}$Cl $β$-delayed proton decay through the key $J^π=3/2^{+}$, 260-keV resonance. The intensity $I^{260}_{βp} = 8.3^{+1.2}_{-0.9} \times 10^{-6}$ represents the weakest $β$-delayed, charged-particle emission ever measured below 400 keV, resulting in a proton branching ratio of $Γ_p / Γ= 2.5^{+0.4}_{-0.3} \times 10^{-4}$. By combining this measurement with shell-model calculations for $Γ_γ$ and past work on other resonances, the total $^{30}$P$(p,γ)^{31}$S rate has been determined with reduced uncertainty. The new rate has been used in hydrodynamic simulations to model the composition of nova ejecta, leading to a concrete prediction of $^{30}$Si/$^{28}$Si excesses in presolar nova grains and the calibration of nuclear thermometers. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2204_05444 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Constraining the $^{30}$P($p,γ)^{31}$S reaction rate in ONe novae via the weak, low-energy, $β$-delayed proton decay of $^{31}$Cl Budner, T. Friedman, M. Wrede, C. Brown, B. A. José, J. Pérez-Loureiro, D. Sun, L. J. Surbrook, J. Ayyad, Y. Bardayan, D. W. Chae, K. Chen, A. A. Chipps, K. A. Cortesi, M. Glassman, B. Hall, M. R. Janasik, M. Liang, J. O'Malley, P. Pollacco, E. Psaltis, A. Stomps, J. Wheeler, T. Nuclear Experiment Solar and Stellar Astrophysics Nuclear Theory The $^{30}$P$(p,γ)^{31}$S reaction plays an important role in understanding nucleosynthesis of $A\geq 30$ nuclides in oxygen-neon novae. The Gaseous Detector with Germanium Tagging was used to measure $^{31}$Cl $β$-delayed proton decay through the key $J^π=3/2^{+}$, 260-keV resonance. The intensity $I^{260}_{βp} = 8.3^{+1.2}_{-0.9} \times 10^{-6}$ represents the weakest $β$-delayed, charged-particle emission ever measured below 400 keV, resulting in a proton branching ratio of $Γ_p / Γ= 2.5^{+0.4}_{-0.3} \times 10^{-4}$. By combining this measurement with shell-model calculations for $Γ_γ$ and past work on other resonances, the total $^{30}$P$(p,γ)^{31}$S rate has been determined with reduced uncertainty. The new rate has been used in hydrodynamic simulations to model the composition of nova ejecta, leading to a concrete prediction of $^{30}$Si/$^{28}$Si excesses in presolar nova grains and the calibration of nuclear thermometers. |
| title | Constraining the $^{30}$P($p,γ)^{31}$S reaction rate in ONe novae via the weak, low-energy, $β$-delayed proton decay of $^{31}$Cl |
| topic | Nuclear Experiment Solar and Stellar Astrophysics Nuclear Theory |
| url | https://arxiv.org/abs/2204.05444 |