N2-broadening coefficients in the ν2 and ν4 bands of PH3 at low temperature

J.-P. Bouanich, G. Blanquet

Research output: Contribution to journalArticle

Abstract

N-broadening coefficients have been measured for 41 transitions of PH at -100 °C in the R branch of the ν band and the P, P, and P branches of the ν band, using a tunable diode-laser spectrometer. The recorded lines with J values ranging from 1 to 13 and K from 0 to 10 are located between 1026 and 1093 cm. The collisional widths are determined by fitting each spectral line with a Voigt profile, a Rautian profile, and a speed-dependent Rautian profile. The latter models provide larger broadening coefficients than the Voigt model. These coefficients have also been calculated on the basis of a semiclassical model of interacting linear molecules by considering an atom-atom Lennard-Jones potential in addition to the electrostatic contributions. By comparing 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)186-191
Number of pages6
JournalJournal of molecular spectroscopy
Volume241
Issue number2
DOIs
Publication statusPublished - 1 Feb 2007

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

Cite this

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title = "N2-broadening coefficients in the ν2 and ν4 bands of PH3 at low temperature",
abstract = "N-broadening coefficients have been measured for 41 transitions of PH at -100 °C in the R branch of the ν band and the P, P, and P branches of the ν band, using a tunable diode-laser spectrometer. The recorded lines with J values ranging from 1 to 13 and K from 0 to 10 are located between 1026 and 1093 cm. The collisional widths are determined by fitting each spectral line with a Voigt profile, a Rautian profile, and a speed-dependent Rautian profile. The latter models provide larger broadening coefficients than the Voigt model. These coefficients have also been calculated on the basis of a semiclassical model of interacting linear molecules by considering an atom-atom Lennard-Jones potential in addition to the electrostatic contributions. By comparing broadening coefficients at room and low temperatures, the temperature dependence of these broadenings has been determined both experimentally and theoretically.",
author = "J.-P. Bouanich and G. Blanquet",
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N2-broadening coefficients in the ν2 and ν4 bands of PH3 at low temperature. / Bouanich, J.-P.; Blanquet, G.

In: Journal of molecular spectroscopy, Vol. 241, No. 2, 01.02.2007, p. 186-191.

Research output: Contribution to journalArticle

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T1 - N2-broadening coefficients in the ν2 and ν4 bands of PH3 at low temperature

AU - Bouanich, J.-P.

AU - Blanquet, G.

N1 - Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007/2/1

Y1 - 2007/2/1

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