Precision measurement of the 3D1 and 3D2 quadrupole moments in Lu+

Precision measurements of the Lu+ D-3(1) and D-3(2) quadrupole moments have been carried out giving Theta(D-3(1)) = 0.63862(74)ea(0)(2) and Theta(D-3(2)) = 0.8602(14)ea(0)(2), respectively. The measurements utilize the differential shift between ions in a multi-ion crystal so that effects of external field gradients do not contribute, leaving only the well-defined Coulomb interaction. At this level of precision, hyperfine-mediated corrections will likely be important.