Single-particle states in Dy-149(66)83 at high spin

Abstract

High-spin states have been populated in the nucleus Dy-149 using the Sn-122(S-32, 5n)Dy-149 reaction at a beam energy of 163 MeV, The experimental level scheme has been extended to a spin of 61/2 h, corresponding to an energy of about 12 MeV, and is adequately explained in the context of the shell model. Most of the levels are characterized by maximally aligned single-particle states with no evidence of collectivity. An alternate shell-model approach has been adopted to assign shell-model configurations.