Low and room temperature measurements and calculations of O2-broadening coefficients in the ν3 band of 12C32S2

O2-broadening coefficients have been measured for 16 lines in the P and R branches of the fundamental ν3 band of 12C32S2 at room and low temperatures (298.0, 273.2, 248.2, 223.2, and 198.2K), using a tunable diode laser spectrometer and a low temperature cell. These lines from P(62) and R(64) are located in the spectral range 1519–1547cm−1. The collisional half-widths are obtained by fitting each observed profile with the Voigt and Rautian lineshape models. The broadening coefficients have also been calculated at all experimental temperatures using a semiclassical calculation performed by considering in addition to the electrostatic quadrupole–quadrupole interaction, a simple anisotropic contribution. Finally, from all the results, the parameter n of the temperature dependence of the broadening coefficients has been determined both experimentally and theoretically.