Understanding the cosmic abundance of ${}^{22}$Na: lifetime measurements in ${}^{23}$Mg

C. Fougères, F. de Oliveira Santos, N. A. Smirnova +2

Simulations of explosive nucleosynthesis in novae predict the production of ${}^{22}$Na, a key astronomical observable to constrain nova models. Its gamma-ray line at 1.275 MeV has n…