Globular cluster stars exhibit star-to-star anticorrelations between oxygen and sodium in their atmospheres. An improved description of the sodium-destroying ${}^{23}\mathrm{Na}+\mathrm{p}$ reaction rates is essential to understanding these observations. We present an energy analysis of ${}^{24}\mathrm{Mg}$ states based on a new measurement of the ${}^{23}\mathrm{Na}({}^3\mathrm{He},\mathrm{d}){}^{24}\mathrm{Mg}$ reaction. A key resonance in ${}^{23}\mathrm{Na}(\mathrm{p},\gamma ){}^{24}\mathrm{Mg}$ is found to be at $E_r^{\text{c.m.}}=133\left(3\right)$ keV, 5 keV lower than previously adopted. This finding has a dramatic effect on the ${}^{23}\mathrm{Na}(\mathrm{p},\gamma ){}^{24}\mathrm{Mg}$ reaction rate, increasing it by a factor of 2 for the recommended rate. The nucleosynthesis impact of this change is investigated.

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• Direct reactions
• Hydrostatic stellar nucleosynthesis
• Nuclear astrophysics
• Nuclear structure & decays
• Nucleon induced nuclear reactions
• Radiative capture