Pure Rotational Spectra of CS

Abstract

Abstract The pure rotational spectra of CS and its isotopomers 12C 33S, 12C 34S, 13C 32S, 13C 33S, 13C 34S including the very rare isotopomer 12C 36S were observed. The rotational spectra include ground and vibrationally excited transitions up to v = 16. The new measurements have been performed with the Cologne terahertz spectrometer covering the frequency region from 259 to 1075 GHz. These newly observed rotational transitions together with earlier data were fitted to a Dunham-type Hamiltonian. The obtained isotopically invariant parameters include vibrational and rotational expansion coefficients.