Diode-laser measurements of Ar- and CO2-broadened linewidths in the nu1 band of OCS

Computer Science

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Argon, Carbon Dioxide, Diodes, Solid State Lasers, Interstellar Extinction, Laser Spectrometers, Planetary Atmospheres, Pressure Distribution, Spectral Line Width, Sulfides, Tunable Lasers

Scientific paper

The pressure-broadening coefficients for a number of spectral lines ranging from the absolute value of m from 1 to 58 in the nu1 band of O-16C-12S-32 have been measured for collisions with Ar and CO2 with a tunable diode-laser spectrometer. The results are compared with values calculated on the basis of the Tsao-Curnutte (1962) theory and an improved semiclassical impact theory. For OCS-Ar, we have used the Tipping-Herman intermolecular potential, as well as an atom-atom interaction model. For OCS-CO2, in addition to electrostatic interactions, a simple formalism for the anisotropic dispersion forces and the atom-atom interactions have been successively considered.

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