Study of single-particle states in 23F using proton transfer reaction

The proton shell structure in neutron-rich fluorine 23F was investigated using the in-beam γ-ray spectroscopy technique via the proton transfer reaction onto the unstable nucleus 22O, in addition to α inelastic scattering on 23F, and the neutron-knockout reaction from 24F. The level and γ-decay scheme in 23F was deduced from de-excitation γ-ray-particle coincidence events. We found that a single-particle state at 4.061 MeV has a large contribution from the d shell by the analysis of population strengths and the angular distribution for the state. We reported here the present experiment and the preliminary results. (orig.)