Proton hole states in 95Y and /sup 95,97,99/Nb

The proton hole states of 95Y and /sup 95,97,99/Nb have been studied by the (t,α) reaction using a polarized beam of 17 MeV tritons on targets of 96Zr and /sup 96,98,100/Mo. The results yield a number of new levels as well as numerous new spin assignments based on the large analyzing powers characteristic of the (t,α) reaction. Examination of the systematics of the resulting level schemes indicates a tendency towards deformation with increasing neutron number, which is expected given the known deformed region above A = 100. However, 97Nb is also clearly affected by the N = 56 subshell closure. This subshell closure has a major effect on the level structure of 96Zr but is completely washed out in 98Mo