Measurements of then=15−17f−gintervals in Cs

Measurements are reported for the Cs $nf-ng$ ($n=15-17\mathrm{}$) intervals by a microwave resonance technique. From the centers of gravity of the $n=15-17\mathrm{}$ $f-g$ intervals and previous measurements, values for the effective ${\mathrm{Cs}}^{+}$ dipole and quadrupole polarizabilities are determined. The observed inverted fine-structure intervals of the $f$ states are consistent with earlier measurements, and the $g$ fine-structure intervals are no larger than hydrogenic in magnitude.