Level-crossing determination of the6s6pP13hfs ofHg193m

The magnetic-dipole and electric-quadrupole hfs interaction constants of 11-h ${}_{}{}^{193m}{}_{}{}^{}\mathrm{Hg}$ in the $6s6p{}_{}{}^3{}_{}{}^{}P_1^{}{}_{}{}^{}$ state were determined from the observation of four level crossings. Previous studies relied on the observation of a single level crossing (W. W. Smith) and on optical spectroscopic data. The results, with second-order hyperfine, Zeeman, and cross Zeeman-hyperfine corrections are $A=-2399.60\mathrm{}\left(3\right)\mathrm{}$ MHz and $B=-655.6\mathrm{}\left(18\right)\mathrm{}$ MHz. The calculated hfs anomaly ${}_{}{}^{193m}{}_{}{}^{}\Delta _{}^{199}{}_{}{}^{}$ is 1.055(1)%, and the resulting electric-quandrupole moment is 1.2(1) b. The isotope shift is redetermined by the new hfs results.