Precise measurement of hyperfine structure in the $3{\mathrm{S}}_{1\mathrm{/}2}$ state of ${}^7\mathrm{L}\mathrm{i}$

We report a precise measurement of hyperfine structure in the $ \rm {3,S_{1/2}} $stateoftheoddisotopeofLi,namely$ \rm {^7Li} $. The state is excited from the ground $2{\mathrm{S}}_{1\mathrm{/}2}$ state (which has the same parity) using two single-photon transitions via the intermediate $ \rm {2,P_{3/2}} $state\mathrm{.}Thevalueofthehyperfineconstantwemeasureis$ A = 93.095(52)$ MHz, which resolves two discrepant values reported in the literature measured using other techniques. Our value is also consistent with theoretical calculations.