Spin Assignments to Highly Excited States inMg24from Triple-Correlation Measurements

Abstract

Triple correlation measurements using the reaction ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}({}_{}{}^{12}{}_{}{}^{}\mathrm{C},{\alpha }_1){}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}_{}^{*}{}_{}{}^{}\to {\alpha }_2+{}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}\left(2^{+}\right)\to \gamma +{}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}(\mathrm{g}.\mathrm{s}.\mathrm{})$ have been made to determine spins and parities of several highly excited states in ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$. Our results allow unambiguous assignments of spin and parity $8^{+}$ to the states at 16.30 and 16.84 MeV. The group at 16.55 MeV is a doublet with one member having spin and parity $8^{+}$, while the other member is most likely a $9^{-}$ state.