H2-broadening coefficients in the v3 band of CH3D at low temperatures

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

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Résumé

Using a diode-laser spectrometer, we have measured H-broadening coefficients of CHD at low temperatures (153.5, 183.5, and 223.5 K) for four lines in the v band. The collisional widths are obtained by fitting each absorption line with three lineshape models: the Voigt, Rautian, and Galatry profiles. The broadening coefficients are also calculated on the basis of a semiclassical model of interacting linear molecules by considering an atom-atom Lennard-Jones potential in addition to electrostatic contributions. By comparing the broadening coefficients at room and low temperatures the temperature dependence of these broadenings has been determined both experimentally and theoretically.
langue originaleAnglais
Pages (de - à)329-334
Nombre de pages6
journalJournal of molecular spectroscopy
Volume219
Numéro de publication2
Les DOIs
Etat de la publicationPublié - 1 juin 2003

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