Nuclear structure studies of ${}^{24}$F

Abstract

The structure of the ${}^{24}$F nucleus has been studied at GANIL using the $\beta$ decay of ${}^{24}$O and the in-beam $\gamma$-ray spectroscopy from the fragmentation of projectile nuclei. Combining these complementary experimental techniques, the level scheme of ${}^{24}$F has been constructed up to 3.6 Mev by means of particle-$\gamma$ and particle-$\gamma \gamma$ coincidence relations. Experimental results are compared to shell-model calculations using the standard USDA and USDB interactions as well as ab-initio valence-space Hamiltonians calculated from the in-medium similarity renormalization group based on chiral two- and three-nucleon forces. Both methods reproduce the measured level spacings well, and this close agreement allows unidentified spins and parities to be consistently assigned.

Comments: 5 figures, 2 tables