Saturated absorption spectroscopy in the ultra-violet with a continuous-wave, frequency-doubled, ring dye laser; even isotope shifts on the 6d3D1-6p3P0 transition of HgI

Abstract

A novel, single-frequency, continuous-wave, ring, dye laser with intra-cavity frequency-doubling has been developed, and used to carry out saturated absorption spectroscopy on the 6s6d3D1-6s6p3P0 transition of Hg I at 296.7 nm. Even isotope shifts have been measured by this technique on this transition and are: Hg204-202, 350 ± 10 MHz; Hg202-200, 345 ± 10 MHz; Hg200-198, 310 ± 10 MHz. The shift on transitions from the hyperfine state 6s6d3D1 (F = 32) between Hg199 and Hg201 has also been measured, and is 225 ± 10 MHz.