A deformed configuration mixing shell model based on Hartree-Fock states with extension to include isospin projection is applied to study the structure of low-lying levels in the odd-odd $N=Z$ nuclei ${}^{62}\mathrm{Ga}$ and ${}^{66}\mathrm{As}.$ A realistic G-matrix interaction for the ${(f}_{5/2}{\mathrm{pg}}_{9/2})$ space with monopole correction is employed in the calculations. The $T=0\mathrm{}$ and $T=1\mathrm{}$ spectra for ${}^{62}\mathrm{Ga}$ compare well with experiment and shell model. The predicted spectrum for ${}^{66}\mathrm{As}$ is close to the recent interacting boson model (IBM-4) results.

• Received 8 April 2002

DOI:https://doi.org/10.1103/PhysRevC.66.024301