APS : Probing the $_{31}\mathrm{Ga}$ ground-state properties in the region near $Z=28$ with high-resolution laser spectroscopy

Magnetic-dipole and electric-quadrupole moments for $^{65,67,69,75,79\text{--}82}\mathrm{Ga}$ are reported using the Collinear Resonance Ionization Spectroscopy (CRIS) technique at the ISOLDE facility, CERN. The moments of $^{65}\mathrm{Ga}$ have been measured for the first time: $\ensuremath{\mu}=+1.775(3)\phantom{\rule{4pt}{0ex}}{\ensuremath{\mu}}_{\mathrm{N}}$ and ${Q}_{s}=+21.0(15)\phantom{\rule{4pt}{0ex}}e\phantom{\rule{0.16em}{0ex}}{\mathrm{fm}}^{2}$. These results are compared to shell-model calculations using the GXPF1 and JUN45 interactions and the trends of the moments approaching the region of the doubly magic $^{56}\mathrm{Ni}$ are discussed. Additionally, new values for the change in mean-square charge radii for $^{65}\mathrm{Ga}$ and $^{67}\mathrm{Ga}$ allow investigation into the odd-even staggering in the region below $N=40$.