The shapes of even-even N=Z nuclei ${}_{}{}^{64}{}_{}{}^{}\mathrm{Ge}$, ${}_{}{}^{68}{}_{}{}^{}\mathrm{Se}$, ${}_{}{}^{72}{}_{}{}^{}\mathrm{Kr}$, ${}_{}{}^{76}{}_{}{}^{}\mathrm{Sr}$, and ${}_{}{}^{80}{}_{}{}^{}\mathrm{Zr}$ are studied using deformed relativistic mean field theory. Large deformations (β≊0.5) for ground states are found for ${}_{}{}^{76}{}_{}{}^{}\mathrm{Sr}$ and ${}_{}{}^{80}{}_{}{}^{}\mathrm{Zr}$ nuclei. The microscopic structures of these superdeformed configurations are emphasized.

• Received 1 December 1992

DOI:https://doi.org/10.1103/PhysRevC.47.2978