Xe-broadening coefficients of 12CH3D: A test of theoretical line shapes

Christophe Lerot, Ghislain Blanquet, Jean Pierre Bouanich, Jacques Walrand, Muriel Lepère

Research output: Contribution to journalArticle


We present the Xe-broadening coefficients for six lines belonging to the ν3 band of 12CH3D measured at room temperature with a diode-laser spectrometer. The collisional widths are obtained from least-squares fitting of each absorption line with theoretical line shapes. We used the well-known Voigt profile, the soft and hard collision models considering the collisional narrowing and also line shapes taking into account the speed dependence of the collisional cross-section. The results derived by these different models are compared with each other and with theoretical broadening coefficients. The calculations are based on a semiclassical impact formalism that includes the atom-atom Lennard-Jones potential for CH 3D-Xe interactions in which CH3D is considered as a linear molecule.

Original languageEnglish
Pages (from-to)1213-1220
Number of pages8
JournalMolecular physics
Issue number9
Publication statusPublished - 10 May 2005


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