Hyperfine Structures, Isotope Shifts, and Nuclear Moments of Hg^195, Hg^195m, and Hg^194†

Abstract

The hyperfine structures of five lines in the optical spectra of Hg¹⁹⁵, Hg^195m, and Hg¹⁹⁴ have been investigated under high resolution. The nuclear moments, calculated from ratios of hyperfine splittings, are μ(195^m) = −1.060 ± 0.01 nm, Q(195^m) = 1.5 ± 1 b, and μ(195) = +0.526 ± 0.005 nm. Isotope shifts measured relative to Hg¹⁹⁶ were found to be Δ(195–196) = +77.2 ± 5 mK, Δ(195^m–196) = +92.6 ± 5 mK, and Δ(194–196) = +143 ± 10 mK. The last result is not in agreement with published measurements. Further investigation is required before a theory can be considered applicable.