Nitrogen Broadening of Acetylene Lines in the v5 Band at Low Temperature

Research output: Contribution to journalArticle

Abstract

N-broadening coefficients have been measured for 22 lines of CH at 173.4 K in the P and R branches of the v band, using a tunable diode-laser spectrometer. The lines with J values ranging from 1 to 29 are located in the spectral range of 661-762 cm. The collisional widths obtained by Rautian profiles fitting closely the measured spectral shape of the lines are slightly larger than those derived from Voigt profiles. Semiclassical calculations of these broadenings have been performed by considering, in addition to electrostatic interactions, successively the atom-atom model and the Tipping-Herman intermolecular potential. The results obtained, which for some of them are in good agreement with the experimental data, depend significantly on the isotropic potential used to describe the trajectory model. By comparing broadening coefficients at room and low temperature, their temperature dependencies have been determined both experimentally and theoretically
Original languageEnglish
Pages (from-to)7-14
Number of pages8
JournalJournal of molecular spectroscopy
Volume190
Issue number1
Publication statusPublished - 1 Jul 1998

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Acetylene
acetylene
Nitrogen
nitrogen
Atoms
laser spectrometers
coefficients
profiles
Coulomb interactions
atoms
Semiconductor lasers
Spectrometers
diodes
Trajectories
trajectories
methylidyne
electrostatics
Temperature
room temperature
interactions

Cite this

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title = "Nitrogen Broadening of Acetylene Lines in the v5 Band at Low Temperature",
abstract = "N-broadening coefficients have been measured for 22 lines of CH at 173.4 K in the P and R branches of the v band, using a tunable diode-laser spectrometer. The lines with J values ranging from 1 to 29 are located in the spectral range of 661-762 cm. The collisional widths obtained by Rautian profiles fitting closely the measured spectral shape of the lines are slightly larger than those derived from Voigt profiles. Semiclassical calculations of these broadenings have been performed by considering, in addition to electrostatic interactions, successively the atom-atom model and the Tipping-Herman intermolecular potential. The results obtained, which for some of them are in good agreement with the experimental data, depend significantly on the isotropic potential used to describe the trajectory model. By comparing broadening coefficients at room and low temperature, their temperature dependencies have been determined both experimentally and theoretically",
author = "J.-P. Bouanich and G. Blanquet and J.-C. Populaire and J. Walrand",
note = "Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.",
year = "1998",
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language = "English",
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pages = "7--14",
journal = "Journal of molecular spectroscopy",
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Nitrogen Broadening of Acetylene Lines in the v5 Band at Low Temperature. / Bouanich, J.-P.; Blanquet, G.; Populaire, J.-C.; Walrand, J.

In: Journal of molecular spectroscopy, Vol. 190, No. 1, 01.07.1998, p. 7-14.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Nitrogen Broadening of Acetylene Lines in the v5 Band at Low Temperature

AU - Bouanich, J.-P.

AU - Blanquet, G.

AU - Populaire, J.-C.

AU - Walrand, J.

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

PY - 1998/7/1

Y1 - 1998/7/1

N2 - N-broadening coefficients have been measured for 22 lines of CH at 173.4 K in the P and R branches of the v band, using a tunable diode-laser spectrometer. The lines with J values ranging from 1 to 29 are located in the spectral range of 661-762 cm. The collisional widths obtained by Rautian profiles fitting closely the measured spectral shape of the lines are slightly larger than those derived from Voigt profiles. Semiclassical calculations of these broadenings have been performed by considering, in addition to electrostatic interactions, successively the atom-atom model and the Tipping-Herman intermolecular potential. The results obtained, which for some of them are in good agreement with the experimental data, depend significantly on the isotropic potential used to describe the trajectory model. By comparing broadening coefficients at room and low temperature, their temperature dependencies have been determined both experimentally and theoretically

AB - N-broadening coefficients have been measured for 22 lines of CH at 173.4 K in the P and R branches of the v band, using a tunable diode-laser spectrometer. The lines with J values ranging from 1 to 29 are located in the spectral range of 661-762 cm. The collisional widths obtained by Rautian profiles fitting closely the measured spectral shape of the lines are slightly larger than those derived from Voigt profiles. Semiclassical calculations of these broadenings have been performed by considering, in addition to electrostatic interactions, successively the atom-atom model and the Tipping-Herman intermolecular potential. The results obtained, which for some of them are in good agreement with the experimental data, depend significantly on the isotropic potential used to describe the trajectory model. By comparing broadening coefficients at room and low temperature, their temperature dependencies have been determined both experimentally and theoretically

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