Pure Rotational Spectrum of H 2S in the Far-Infrared Region Measured by FTIR Spectroscopy

Abstract

The pure rotational spectrum of H 2S 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 J 10 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.