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

Research output: Contribution to journalArticle

Abstract

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
Volume219
Issue number2
DOIs
Publication statusPublished - 1 Jun 2003

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coefficients
Lennard-Jones potential
Atoms
laser spectrometers
Temperature
atoms
Semiconductor lasers
Spectrometers
Electrostatics
diodes
electrostatics
temperature dependence
Molecules
room temperature
profiles
molecules

Cite this

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title = "H2-broadening coefficients in the v3 band of CH3D at low temperatures",
abstract = "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.",
author = "C. Lerot and J. Walrand and G. Blanquet and J.-P. Bouanich and M. Lep{\`e}re",
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H2-broadening coefficients in the v3 band of CH3D at low temperatures. / Lerot, C.; Walrand, J.; Blanquet, G.; Bouanich, J.-P.; Lepère, M.

In: Journal of molecular spectroscopy, Vol. 219, No. 2, 01.06.2003, p. 329-334.

Research output: Contribution to journalArticle

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T1 - H2-broadening coefficients in the v3 band of CH3D at low temperatures

AU - Lerot, C.

AU - Walrand, J.

AU - Blanquet, G.

AU - Bouanich, J.-P.

AU - Lepère, M.

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AB - 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.

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