Spins, Electromagnetic Moments, and Isomers of ${}^{107\mathrm{\text{−}}129}\mathrm{Cd}$

The neutron-rich isotopes of cadmium up to the $N=82$ shell closure have been investigated by high-resolution laser spectroscopy. Deep-uv excitation at 214.5 nm and radioactive-beam bunching provided the required experimental sensitivity. Long-lived isomers are observed in ${}^{127}\mathrm{Cd}$ and ${}^{129}\mathrm{Cd}$ for the first time. One essential feature of the spherical shell model is unambiguously confirmed by a linear increase of the $11/2^{-}$ quadrupole moments. Remarkably, this mechanism is found to act well beyond the $h_{11/2}$ shell.