The gyromagnetic factors associated with the yrast levels (with $2^{+}$≤$J^{\pi }$≤${12}^{+}$) in some doubly even Ge and Se isotopes are discussed in a microscopic, parameter-free perspective in terms of the variational wave functions resulting from realistic effective interactions operating in the (2${\mathit{p}}_{3/2}$,2${\mathit{p}}_{1/2}$,1${\mathit{f}}_{5/2}$,1${\mathit{g}}_{9/2}$${)}^{\mathrm{gr}}$,ν configuration space. The estimates for the g factors of the yrast $2^{+}$ states are consistent with the available experimental results. The calculations reveal that the g factors for the high-spin states can provide important quantitative signatures vis-à-vis the occurrence of various structural changes in the anomalous yrast spectra in the germanium region.

• Received 2 June 1988

DOI:https://doi.org/10.1103/PhysRevC.38.2928