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

Abstract

The structure of the ${}^{24}$F nucleus has been studied at GANIL using the ${\hat{I}}^2$ decay of ${}^{24}$O and the in-beam ${\hat{I}}^3$-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-${\hat{I}}^3$ and particle-${\hat{I}}^3{\hat{I}}^3$ 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.

5 figures, 2 tables