Experimental evidence of a natural parity state in ${}^{26}$Mg and its impact to the production of neutrons for the s process

Abstract

We have studied natural parity states in ${}^{26}$Mg via the ${}^{22}$Ne(${}^6$Li,d)${}^{26}$Mg reaction. Our method significantly improves the energy resolution of previous experiments and, as a result, we report the observation of a natural parity state in ${}^{26}$Mg. Possible spin-parity assignments are suggested on the basis of published $\gamma$-ray decay experiments. The stellar rate of the ${}^{22}$Ne($\alpha$,$\gamma$)${}^{26}$Mg reaction is reduced and may give rise to an increase in the production of s-process neutrons via the ${}^{22}$Ne($\alpha$,n)${}^{25}$Mg reaction.

Published in PRC

References in corpus (1)

• s-Process Nucleosynthesis in Advanced Burning Phases of Massive Stars

Cited by in corpus (10)

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• Neutron spectroscopy of ${}^{26}$Mg states: constraining the stellar neutron source ${}^{22}$Ne($\alpha ,n$)${}^{25}$Mg
• Constraining the ${}^{22}$Ne($\alpha$,$\gamma$)${}^{26}$Mg and ${}^{22}$Ne($\alpha$,n)${}^{25}$Mg reaction rates using sub-Coulomb $\alpha$-transfer reactions
• First direct limit on the 334 keV resonance strength in the ${}^{22}$Ne(α,γ)${}^{26}$Mg reaction
• Decay properties of ${}^{22}\mathrm{Ne}+\alpha$ resonances and their impact on $s$-process nucleosynthesis
• Study of (${}^6$Li, $d$) and (${}^6$Li, $t$) reactions on ${}^{22}$Ne and implications for $s$-process nucleosynthesis
• Underground Measurements of Nuclear Reaction Cross-Sections Relevant to AGB Stars
• The ${}^{22}$Ne($\alpha$,n)${}^{25}$Mg reaction -- state of the art, astrophysics, and perspectives
• Strength measurement of the $E_{\alpha }^{lab}$ = 830 keV resonance in ${}^{22}\mathrm{Ne}(\alpha ,\mathrm{n}{)}^{25}\mathrm{Mg}$ reaction using a stilbene detector
• The 2025 Evaluation of Experimental Thermonuclear Reaction Rates (ETR25)