The properties of negative-parity states of ${}_{}{}^{69,71}{}_{}{}^{}\mathrm{Ge}$ are interpreted in the framework of the Alaga and the Bohr-Mottelson semimicroscopic models, respectively. The situation for positive-parity states is more complicated, but gives evidence for the correlations of the Alaga model. Both the calculations and the generalized vibrational intensity and selection rules discussion of low-lying spectra are presented.

NUCLEAR STRUCTURE ${}_{}{}^{69,71}{}_{}{}^{}\mathrm{Ge}$, calculated spectra, electromagnetic properties. Neutron (hole) clusters coupled to quadrupole vibration.

• Received 15 January 1976

DOI:https://doi.org/10.1103/PhysRevC.13.2532