Nuclear structure of 94,95Mo at high spins

The high-spin level structures of 94,95Mo (N=52,53) have been investigated via the 65Cu(36S, αp2n)94Mo and 65Cu(36S, αpn)95Mo reactions at 142 MeV. The level schemes have been extended up to spin J∼19ℎ and excitation energies Ex∼12 MeV. Spherical shell-model calculations have been performed and compared with the experimental energy levels. The level structure of 94Mo exhibits a single-particle nature and the higher-angular-momentum states are dominated by the excitation of a g9/2 neutron across the N=50 shell gap. The level sequences observed in 95Mo have been interpreted on the basis of the spherical shell model and weak coupling of a d5/2 or a g7/2 neutron to the 94Mo core. copyright 1998 The American Physical Society