Low and room temperature measurements and calculations of O2-broadening coefficients in the ν3 band of CS2 |
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Authors: | Félicité Misago Jacques Walrand Ghislain Blanquet |
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Institution: | a Laboratoire de Spectroscopie Moléculaire, FUNDP, 61, rue de Bruxelles, B-5000 Namur, Belgium b Laboratoire de Photophysique Moléculaire, Université de Paris-Sud, F-91405 Orsay, France |
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Abstract: | 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 198.2 K), 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 1519-1547 cm−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. |
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Keywords: | Carbon disulfide Oxygen Diode-laser Pressure broadening |
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