Analysis of O2-broadening of 12CH3F lines in the 6.8 μm spectral region

M. Lepère, J.-P. Bouanich, G. Blanquet, J. Walrand

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Using a tunable diode-laser spectrometer, we have measured the O-broadening coefficients for 45 lines of methyl fluoride in the P and R branches of the ν parallel band, and in the P, Q, R, P, Q, and R branches of the ν perpendicular band. These lines with J values ranging from 1 to 23 and K from 0 to 9 (K ≤ J) are located in the spectral range 1416-1573 cm. The collisional halfwidths are obtained by modeling each spectral line with a Voigt and a Rautian profile. The noncorrelated Rautian model leads to larger values of broadening coefficients than the Voigt model. These coefficients have also been calculated from a semiclassical model in which the intermolecular potential includes electrostatic, induction, and dispersion energy contributions. The results in the P, Q, and R branches of the ν and ν bands are in overall agreement with the experimental data,
langue originaleAnglais
Pages (de - à)17-24
Nombre de pages8
journalJournal of molecular spectroscopy
Numéro de publication1
Etat de la publicationPublié - 1 janv. 1998

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