CO2 -broadening coefficients in the ν3 fundamental band of methane

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

In this paper, CO 2 -broadening coefficients of 11 lines in the ν 3 band of CH 4 , located between 2906 and 2959 cm −1 , were measured at room temperature using an improved tunable diode-laser spectrometer. Each line was recorded for 4 different pressures, ranging from 20.15 to 60.20 mbar. The experimental determination of the CO 2 -broadening coefficients was performed by fitting a theoretical profile on the experimental line shape for each line recorded at each pressure. The Voigt, Rautian-Sobel'man and Galatry models were therefore used. The ratio between the present CO 2 -broadened results and the data available in the literature for air-broadening is investigated and compared to the ratio between N 2 - and air-broadening. The γ CO 2 air presents significant differences with the ratio γ N 2 air as well as a large scattering. This shows the need to make dedicated studies, both experimentally and theoretically, for CO 2 -broadening coefficients.

langue originaleAnglais
Pages (de - à)1-6
Nombre de pages6
journalJournal of molecular spectroscopy
Volume360
Les DOIs
étatPublié - 1 juin 2019

Empreinte digitale

Methane
Carbon Monoxide
methane
air
coefficients
Air
laser spectrometers
line shape
diodes
methylidyne
Semiconductor lasers
Spectrometers
Scattering
room temperature
profiles
scattering
Temperature

Citer ceci

@article{bc907962b19b4500ad7b311ccb249612,
title = "CO2 -broadening coefficients in the ν3 fundamental band of methane",
abstract = "In this paper, CO 2 -broadening coefficients of 11 lines in the ν 3 band of CH 4 , located between 2906 and 2959 cm −1 , were measured at room temperature using an improved tunable diode-laser spectrometer. Each line was recorded for 4 different pressures, ranging from 20.15 to 60.20 mbar. The experimental determination of the CO 2 -broadening coefficients was performed by fitting a theoretical profile on the experimental line shape for each line recorded at each pressure. The Voigt, Rautian-Sobel'man and Galatry models were therefore used. The ratio between the present CO 2 -broadened results and the data available in the literature for air-broadening is investigated and compared to the ratio between N 2 - and air-broadening. The γ CO 2 /γ air presents significant differences with the ratio γ N 2 /γ air as well as a large scattering. This shows the need to make dedicated studies, both experimentally and theoretically, for CO 2 -broadening coefficients.",
keywords = "Carbon dioxide, CH, CO, Collisional broadenings, Diode-laser, Methane",
author = "Bastien Vispoel and Laurent Fissiaux and Muriel Lep{\`e}re",
year = "2019",
month = "6",
day = "1",
doi = "10.1016/j.jms.2018.12.004",
language = "English",
volume = "360",
pages = "1--6",
journal = "Journal of molecular spectroscopy",
issn = "0022-2852",
publisher = "Academic Press Inc.",

}

CO2 -broadening coefficients in the ν3 fundamental band of methane. / Vispoel, Bastien; Fissiaux, Laurent; Lepère, Muriel.

Dans: Journal of molecular spectroscopy, Vol 360, 01.06.2019, p. 1-6.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - CO2 -broadening coefficients in the ν3 fundamental band of methane

AU - Vispoel, Bastien

AU - Fissiaux, Laurent

AU - Lepère, Muriel

PY - 2019/6/1

Y1 - 2019/6/1

N2 - In this paper, CO 2 -broadening coefficients of 11 lines in the ν 3 band of CH 4 , located between 2906 and 2959 cm −1 , were measured at room temperature using an improved tunable diode-laser spectrometer. Each line was recorded for 4 different pressures, ranging from 20.15 to 60.20 mbar. The experimental determination of the CO 2 -broadening coefficients was performed by fitting a theoretical profile on the experimental line shape for each line recorded at each pressure. The Voigt, Rautian-Sobel'man and Galatry models were therefore used. The ratio between the present CO 2 -broadened results and the data available in the literature for air-broadening is investigated and compared to the ratio between N 2 - and air-broadening. The γ CO 2 /γ air presents significant differences with the ratio γ N 2 /γ air as well as a large scattering. This shows the need to make dedicated studies, both experimentally and theoretically, for CO 2 -broadening coefficients.

AB - In this paper, CO 2 -broadening coefficients of 11 lines in the ν 3 band of CH 4 , located between 2906 and 2959 cm −1 , were measured at room temperature using an improved tunable diode-laser spectrometer. Each line was recorded for 4 different pressures, ranging from 20.15 to 60.20 mbar. The experimental determination of the CO 2 -broadening coefficients was performed by fitting a theoretical profile on the experimental line shape for each line recorded at each pressure. The Voigt, Rautian-Sobel'man and Galatry models were therefore used. The ratio between the present CO 2 -broadened results and the data available in the literature for air-broadening is investigated and compared to the ratio between N 2 - and air-broadening. The γ CO 2 /γ air presents significant differences with the ratio γ N 2 /γ air as well as a large scattering. This shows the need to make dedicated studies, both experimentally and theoretically, for CO 2 -broadening coefficients.

KW - Carbon dioxide

KW - CH

KW - CO

KW - Collisional broadenings

KW - Diode-laser

KW - Methane

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U2 - 10.1016/j.jms.2018.12.004

DO - 10.1016/j.jms.2018.12.004

M3 - Article

VL - 360

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EP - 6

JO - Journal of molecular spectroscopy

JF - Journal of molecular spectroscopy

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