Ar- and air-broadening coefficients in the ν₃ band of CS₂ at room and low temperatures

Using a diode-laser spectrometer, Ar-broadening coefficients for 16 spectral lines in the fundamental ν band of CS have been measured at five temperatures: 298.0, 273.2, 248.2, 223.2 and 198.2 K. These lines with J values ranging from 2 to 64 are located in the spectral range 1519-1547 cm. The broadening coefficients are also calculated from a semiclassical impact model performed by using a simple empirical intermolecular potential. From the theoretical and experimental results obtained at the different temperatures, we have determined the n exponent values governing the temperature dependence of the broadening coefficients. The air-broadening coefficients for four spectral lines in the ν band of CS have also been measured experimentally at the same temperatures. They are compared to the values derived from those obtained previously for the perturbers N, O and also Ar. © 2007 Elsevier Inc. All rights reserved.