Excitation energies in22Mgfrom the25Mg(3He,6He)22Mgreaction

Abstract

A high-precision measurement of excitation energies in ${}^{22}\mathrm{Mg}$ was performed using the ${}^{25}\mathrm{Mg}{(}^{3}\mathrm{He}{,}^{6}\mathrm{He}{)}^{22}\mathrm{Mg}$ reaction as a different approach to study this proton-rich, astrophysically interesting nucleus. The reaction was studied at 51.0 MeV with the Enge split-pole spectrograph at Yale. Proton-unbound states at 6.051(4) and 6.329(6) MeV were observed, confirming a recent identification of these new states with the ${}^{24}\mathrm{Mg}{(p,t)}^{22}\mathrm{Mg}$ reaction. There is no evidence in our data of a previously reported state at 5.837 MeV.