PURE ROTATIONAL SPECTRUM OF H2S IN THE FAR-INFRARED REGION MEASURED BY FTIR SPECTROSCOPY

The pure rotational spectrum of H2S was recorded with high resolution by a Michelson-type Fourier transform infrared spectrometer in the far-infrared region. More than 370 transitions have been identified from 30 to 260 cm-1, including transitions pertaining to the J = 16 state. The data were analyzed together with the available millimeter- and submillimeter-wave transition frequencies by several forms of Watson's reduced Hamiltonian extended up to the J10 power. Satisfactory fits have been obtained with the S-reduced Hamiltonian in the I(r) and III(r) representation and with the A-reduced one in the I(r) representation, by fitting 30 parameters in all cases. (C) 1994 Academic Press, Inc.