Identification of Single-Particle Configurations at Very High Spin inDy150−152

Gamma-gamma coincidence studies of ${}_{}{}^{150-152}{}_{}{}^{}\mathrm{Dy}$ have been performed with use of Compton-suppressed Ge(Li) detectors to resolve ambiguities in the high-spin structure of these nuclei. On the basis of $I^{\pi }$ assignments, transition rates, and level systematics for ${}_{}{}^{148-152}{}_{}{}^{}\mathrm{Dy}$, the observed levels are interpreted as proton particle-hole excitations coupled to aligned valence neutron configurations. The proposed single-particle configurations are confirmed by shell-model calculations.