H2-broadening in the v7 band of ethylene by diode-laser spectroscopy

Research output: Contribution to journalArticle

Abstract

Using a tunable diode-laser spectrometer, we have measured H-broadening coefficients for 34 lines of CH in the v fundamental band. The studied transitions J′,K′, K′ ← J″, K″, K″ with J″ ranging from 2 to 23, K″ from 0 to 4, and K″ from 2 to 22 in the P, Q, and R branches are located in the spectral range 919-1023 cm. The collisional widths are obtained by modeling each spectral line with a Voigt and a Rautian profile. The measured broadening coefficients belonging to transitions with the same J″ generally increase with increasing K″ and these coefficients decrease slightly on the whole with increasing J″. These behaviors can be roughly predicted by an approximate semiclassical calculation performed by using in addition to the weak electrostatic contributions a simple formalism for the contribution of the intermolecular potential.
Original languageEnglish
Pages (from-to)22-27
Number of pages6
JournalJournal of molecular spectroscopy
Volume218
Issue number1
DOIs
Publication statusPublished - 1 Mar 2003

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Laser spectroscopy
laser spectroscopy
Semiconductor lasers
Spectrometers
Electrostatics
ethylene
diodes
coefficients
laser spectrometers
line spectra
methylidyne
electrostatics
formalism
profiles

Cite this

@article{50c255f1ac5b457fa19cef1fe07e256b,
title = "H2-broadening in the v7 band of ethylene by diode-laser spectroscopy",
abstract = "Using a tunable diode-laser spectrometer, we have measured H-broadening coefficients for 34 lines of CH in the v fundamental band. The studied transitions J′,K′, K′ ← J″, K″, K″ with J″ ranging from 2 to 23, K″ from 0 to 4, and K″ from 2 to 22 in the P, Q, and R branches are located in the spectral range 919-1023 cm. The collisional widths are obtained by modeling each spectral line with a Voigt and a Rautian profile. The measured broadening coefficients belonging to transitions with the same J″ generally increase with increasing K″ and these coefficients decrease slightly on the whole with increasing J″. These behaviors can be roughly predicted by an approximate semiclassical calculation performed by using in addition to the weak electrostatic contributions a simple formalism for the contribution of the intermolecular potential.",
author = "J.-P. Bouanich and G. Blanquet and J. Walrand and M. Lep{\`e}re",
note = "Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.",
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doi = "10.1016/S0022-2852(02)00034-6",
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H2-broadening in the v7 band of ethylene by diode-laser spectroscopy. / Bouanich, J.-P.; Blanquet, G.; Walrand, J.; Lepère, M.

In: Journal of molecular spectroscopy, Vol. 218, No. 1, 01.03.2003, p. 22-27.

Research output: Contribution to journalArticle

TY - JOUR

T1 - H2-broadening in the v7 band of ethylene by diode-laser spectroscopy

AU - Bouanich, J.-P.

AU - Blanquet, G.

AU - Walrand, J.

AU - Lepère, M.

N1 - Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.

PY - 2003/3/1

Y1 - 2003/3/1

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AB - Using a tunable diode-laser spectrometer, we have measured H-broadening coefficients for 34 lines of CH in the v fundamental band. The studied transitions J′,K′, K′ ← J″, K″, K″ with J″ ranging from 2 to 23, K″ from 0 to 4, and K″ from 2 to 22 in the P, Q, and R branches are located in the spectral range 919-1023 cm. The collisional widths are obtained by modeling each spectral line with a Voigt and a Rautian profile. The measured broadening coefficients belonging to transitions with the same J″ generally increase with increasing K″ and these coefficients decrease slightly on the whole with increasing J″. These behaviors can be roughly predicted by an approximate semiclassical calculation performed by using in addition to the weak electrostatic contributions a simple formalism for the contribution of the intermolecular potential.

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