Ar-broadening coefficients in the ν7 band of ethylene at low temperatures

Thi Thuy Linh Nguyen, G. Blanquet, J.-C. Populaire, M. Lepère

Research output: Contribution to journalArticle

Abstract

Using a tunable diode-laser spectrometer adapted with a low temperature cell, the ethylene line-broadening by argon is measured for some vibrotational lines in the ν band at different temperatures varying from 198.2 to 273.2 K. The collisional half-widths obtained by modeling each spectral line with the simple profile of Voigt are always smaller than those derived from the Rautian model which takes into account the Dicke effect. From these collisional half-widths, for each line, the broadening coefficients are obtained for different temperatures. Calculations of the corresponding broadening coefficients are made independently on the basis of the Robert-Bonamy formalism with exact trajectories using an atom-atom intermolecular potential model. The temperature dependence parameters n are determined experimentally and theoretically by comparing the experimental and theoretical broadening coefficients of the same lines at room and different low temperatures.
Original languageEnglish
Pages (from-to)367-375
Number of pages9
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume110
Issue number6-7
DOIs
Publication statusPublished - 1 Apr 2009

Fingerprint

ethylene
coefficients
laser spectrometers
Temperature
rooms
line spectra
atoms
Atoms
diodes
argon
trajectories
Argon
formalism
temperature dependence
temperature
Semiconductor lasers
Spectrometers
profiles
cells
Trajectories

Cite this

@article{50e8b0cc77f1425e8997e69a46646bbd,
title = "Ar-broadening coefficients in the ν7 band of ethylene at low temperatures",
abstract = "Using a tunable diode-laser spectrometer adapted with a low temperature cell, the ethylene line-broadening by argon is measured for some vibrotational lines in the ν band at different temperatures varying from 198.2 to 273.2 K. The collisional half-widths obtained by modeling each spectral line with the simple profile of Voigt are always smaller than those derived from the Rautian model which takes into account the Dicke effect. From these collisional half-widths, for each line, the broadening coefficients are obtained for different temperatures. Calculations of the corresponding broadening coefficients are made independently on the basis of the Robert-Bonamy formalism with exact trajectories using an atom-atom intermolecular potential model. The temperature dependence parameters n are determined experimentally and theoretically by comparing the experimental and theoretical broadening coefficients of the same lines at room and different low temperatures.",
author = "Nguyen, {Thi Thuy Linh} and G. Blanquet and J.-C. Populaire and M. Lep{\`e}re",
note = "Copyright 2009 Elsevier B.V., All rights reserved.",
year = "2009",
month = "4",
day = "1",
doi = "10.1016/j.jqsrt.2008.12.008",
language = "English",
volume = "110",
pages = "367--375",
journal = "Journal of Quantitative Spectroscopy and Radiative Transfer",
issn = "0022-4073",
publisher = "Elsevier Limited",
number = "6-7",

}

Ar-broadening coefficients in the ν7 band of ethylene at low temperatures. / Nguyen, Thi Thuy Linh; Blanquet, G.; Populaire, J.-C.; Lepère, M.

In: Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 110, No. 6-7, 01.04.2009, p. 367-375.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ar-broadening coefficients in the ν7 band of ethylene at low temperatures

AU - Nguyen, Thi Thuy Linh

AU - Blanquet, G.

AU - Populaire, J.-C.

AU - Lepère, M.

N1 - Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/4/1

Y1 - 2009/4/1

N2 - Using a tunable diode-laser spectrometer adapted with a low temperature cell, the ethylene line-broadening by argon is measured for some vibrotational lines in the ν band at different temperatures varying from 198.2 to 273.2 K. The collisional half-widths obtained by modeling each spectral line with the simple profile of Voigt are always smaller than those derived from the Rautian model which takes into account the Dicke effect. From these collisional half-widths, for each line, the broadening coefficients are obtained for different temperatures. Calculations of the corresponding broadening coefficients are made independently on the basis of the Robert-Bonamy formalism with exact trajectories using an atom-atom intermolecular potential model. The temperature dependence parameters n are determined experimentally and theoretically by comparing the experimental and theoretical broadening coefficients of the same lines at room and different low temperatures.

AB - Using a tunable diode-laser spectrometer adapted with a low temperature cell, the ethylene line-broadening by argon is measured for some vibrotational lines in the ν band at different temperatures varying from 198.2 to 273.2 K. The collisional half-widths obtained by modeling each spectral line with the simple profile of Voigt are always smaller than those derived from the Rautian model which takes into account the Dicke effect. From these collisional half-widths, for each line, the broadening coefficients are obtained for different temperatures. Calculations of the corresponding broadening coefficients are made independently on the basis of the Robert-Bonamy formalism with exact trajectories using an atom-atom intermolecular potential model. The temperature dependence parameters n are determined experimentally and theoretically by comparing the experimental and theoretical broadening coefficients of the same lines at room and different low temperatures.

UR - http://www.scopus.com/inward/record.url?scp=62049085869&partnerID=8YFLogxK

U2 - 10.1016/j.jqsrt.2008.12.008

DO - 10.1016/j.jqsrt.2008.12.008

M3 - Article

AN - SCOPUS:62049085869

VL - 110

SP - 367

EP - 375

JO - Journal of Quantitative Spectroscopy and Radiative Transfer

JF - Journal of Quantitative Spectroscopy and Radiative Transfer

SN - 0022-4073

IS - 6-7

ER -