Diode Laser Measurements of Self-Broadening Coefficients in the v5 Band of C2H2 at Low Temperature

D. Lambot, J.-C. Populaire, J. Walrand, G. Blanquet, J.P. Bouanich

Research output: Contribution to journalArticle

Abstract

Collisional self-broadening coefficients for 21 lines in the P and R branches of the v band of CH at low temperature (173 K) have been measured using a tunable diode laser spectrometer and a low-temperature variable path length absorption cell. These lines, with J values ranging from 1 to 25, are located in the spectral range 670-790 cm. A semiclassical line-broadening calculation provides satisfactory results when the electrostatic interactions arising from the hexadecapole moment of CH are taken into account. We have also examined the validity of a simple power law governing the temperature dependence of the broadening coefficients.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalJournal of molecular spectroscopy
Volume165
Issue number1
DOIs
Publication statusPublished - 1 May 1994

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Semiconductor lasers
semiconductor lasers
methylidyne
laser spectrometers
coefficients
diodes
electrostatics
Coulomb interactions
moments
Temperature
temperature dependence
Spectrometers
cells
interactions

Cite this

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abstract = "Collisional self-broadening coefficients for 21 lines in the P and R branches of the v band of CH at low temperature (173 K) have been measured using a tunable diode laser spectrometer and a low-temperature variable path length absorption cell. These lines, with J values ranging from 1 to 25, are located in the spectral range 670-790 cm. A semiclassical line-broadening calculation provides satisfactory results when the electrostatic interactions arising from the hexadecapole moment of CH are taken into account. We have also examined the validity of a simple power law governing the temperature dependence of the broadening coefficients.",
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Diode Laser Measurements of Self-Broadening Coefficients in the v5 Band of C2H2 at Low Temperature. / Lambot, D.; Populaire, J.-C.; Walrand, J.; Blanquet, G.; Bouanich, J.P.

In: Journal of molecular spectroscopy, Vol. 165, No. 1, 01.05.1994, p. 1-11.

Research output: Contribution to journalArticle

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T1 - Diode Laser Measurements of Self-Broadening Coefficients in the v5 Band of C2H2 at Low Temperature

AU - Lambot, D.

AU - Populaire, J.-C.

AU - Walrand, J.

AU - Blanquet, G.

AU - Bouanich, J.P.

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PY - 1994/5/1

Y1 - 1994/5/1

N2 - Collisional self-broadening coefficients for 21 lines in the P and R branches of the v band of CH at low temperature (173 K) have been measured using a tunable diode laser spectrometer and a low-temperature variable path length absorption cell. These lines, with J values ranging from 1 to 25, are located in the spectral range 670-790 cm. A semiclassical line-broadening calculation provides satisfactory results when the electrostatic interactions arising from the hexadecapole moment of CH are taken into account. We have also examined the validity of a simple power law governing the temperature dependence of the broadening coefficients.

AB - Collisional self-broadening coefficients for 21 lines in the P and R branches of the v band of CH at low temperature (173 K) have been measured using a tunable diode laser spectrometer and a low-temperature variable path length absorption cell. These lines, with J values ranging from 1 to 25, are located in the spectral range 670-790 cm. A semiclassical line-broadening calculation provides satisfactory results when the electrostatic interactions arising from the hexadecapole moment of CH are taken into account. We have also examined the validity of a simple power law governing the temperature dependence of the broadening coefficients.

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