Calculation of binding energies and isotope shifts in a long series of rubidium isotopes

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.