Nuclear structure studies ofF24

The structure of the F24 nucleus has been studied at GANIL using the β decay of O24 and the in-beam γ-ray spectroscopy from the fragmentation of Na27,28,Ne,25,26 and Mg29,30 nuclei. Combining these complementary experimental techniques, the level scheme of F24 has been constructed up to 3.6MeV by means of particle-γ and particle-γγ 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.Received 6 January 2015Revised 12 June 2015DOI:https://doi.org/10.1103/PhysRevC.92.014327©2015 American Physical Society