Self-consistent mean-field calculations have been performed on nuclei with $Z=36, 38$. When compared to experimental values, the two neutron separation enegies and the mean-square-charge radii differences are in excellent agreement for isotopes with $N>\mathrm{}50\mathrm{}$, providing additional evidence for a region of strong deformation around $(Z, N)=(40, 60)$. For isotopes with $N<\mathrm{}50\mathrm{}$ the discrepancy between experiment and calculation can account for large zero-point quadrupole vibrations.

NUCLEAR STRUCTURE ${}_{}{}^{76-106}{}_{}{}^{}\mathrm{Sr}$, ${}_{}{}^{75-105}{}_{}{}^{}\mathrm{Rb}$, ${}_{}{}^{74-104}{}_{}{}^{}\mathrm{Kr}$, calculated binding energies and mean-square-charge radii; Hartree-Fock method.

• Received 28 April 1980

DOI:https://doi.org/10.1103/PhysRevC.22.2605