Nuclear structure of94,95Moat high spins

Abstract

The high-spin level structures of {sup 94,95}Mo (N=52,53) have been investigated via the {sup 65}Cu({sup 36}S, {alpha}p2n){sup 94}Mo and {sup 65}Cu({sup 36}S, {alpha}pn){sup 95}Mo reactions at 142 MeV. The level schemes have been extended up to spin J{approx}19{h_bar} and excitation energies E{sub x}{approx}12 MeV. Spherical shell-model calculations have been performed and compared with the experimental energy levels. The level structure of {sup 94}Mo exhibits a single-particle nature and the higher-angular-momentum states are dominated by the excitation of a g{sub 9/2} neutron across the N=50 shell gap. The level sequences observed in {sup 95}Mo have been interpreted on the basis of the spherical shell model and weak coupling of a d{sub 5/2} or a g{sub 7/2} neutron to the {sup 94}Mo core. {copyright} {ital 1998} {ital The American Physical Society}