${}^{22}\mathrm{Mg}$ and the ${}^{21}\mathrm{Na}(p,\gamma )$ reaction rate

We investigate the structure of ${}^{22}\mathrm{Mg}$ just above the proton threshold using shell-model and Coulomb-energy calculations. Our results disagree with some earlier work in identifying which levels are most important for the ${}^{21}\mathrm{Na}(p,\gamma )$ reaction.