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

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

Research output: Contribution to journalArticlepeer-review


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.
Original languageEnglish
Pages (from-to)329-334
Number of pages6
JournalJournal of molecular spectroscopy
Issue number2
Publication statusPublished - 1 Jun 2003


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