Abstract
The long-lived radioactive nuclide $^{22}\mathrm{Na}$ $({t}_{1∕2}=2.6\phantom{\rule{0.3em}{0ex}}\mathrm{yr})$ is an astronomical observable for understanding the physical processes of oxygen-neon novae. Yields of $^{22}\mathrm{Na}$ in these events are sensitive to the unknown total rate of the $^{21}\mathrm{Na}(p,\ensuremath{\gamma})^{22}\mathrm{Mg}$ reaction. Using a high intensity $^{21}\mathrm{Na}$ beam at the $\mathrm{TRIUMF}\text{\ensuremath{-}}\mathrm{ISAC}$ facility, the strengths of seven resonances in $^{22}\mathrm{Mg}$, of potential astrophysical importance, have been directly measured at center of mass energies from ${E}_{\mathrm{c.m.}}=200$ to $1103\phantom{\rule{0.3em}{0ex}}\mathrm{keV}$. We report the results obtained for these resonances and their respective contributions to the $^{21}\mathrm{Na}(p,\ensuremath{\gamma})^{22}\mathrm{Mg}$ rate in novae and x-ray bursts, and their impact on $^{22}\mathrm{Na}$ production in novae.
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