Structures of 17 F and 17 O, 17 Ne and 17 N in the Ground State and the First Excited State

The structures of two couples of mirror nuclei 17 F and 17 O, 17 Ne and 17 N in the ground state and in the first excited state are investigated using the relativistic mean-field approach. Two-proton halo in 17 Ne in the first excited state and in the ground state and two-neutron halo in 17 N in the first excited state are suggested. Meanwhile, one-proton halo in 17 F in the first excited state and one-neutron halo in 17 O in the first excited state are also suggested. The skin structure appears in 17 F and 17 N in the ground state.