Diode-laser measurements of Ar- and CO2-broadened linewidths in the v1 band of OCS

Abstract The pressure-broadening coefficients for a number of spectral lines ranging from| m | = 1to 58 in the v 1 band of 16 O 12 C 32 S, have been measured for collisions with Ar and CO 2 with a tunable diode-laser spectrometer. The results are compared with values calculated on the basis of the Anderson-Tsao-Curnutte theory and an improved semi-classical impact theory. For OCS-Ar, we have used the Tipping-Herman intermolecular potential, as well as an atom-atom interaction model. For OCS-CO 2 , we have considered, in addition to electrostatic interactions, successively a simple formalism for the anisotropic dispersion forces and the atom-atom interactions.

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