MILLIMETER-WAVE AND SUBMILLIMETER-WAVE ROTATIONAL SPECTRA OF RARE HYDROGEN-SULFIDE ISOTOPOMERS

Pure rotational transitions of the hydrogen sulfide isotopomers (H2S)- S-33, (H2S)-S-34, and (H2S)-S-36 have been recorded with high resoluti on in the frequency range between 165 and 1072 GHz in natural abundanc e. Together with previously reported FIR pure rotational transitions o f (H2S)-S-33 and (H2S)-S-34, these data are used to derive an improved set of rotational and centrifugal distortion constants. For the (H2S) -S-33 species, electric quadrupole and magnetic spin-rotation hfs cons tants are also determined. The new data allow accurate frequency predi ctions throughout the submillimeter-wave region for the two isotopomer s (H2S)-S-34 and (H2S)-S-33, including hyperfine splittings for (H2S)- S-33. These predictions are of astrophysical relevance. (C) 1995 Acade mic Press, Inc.