Diode-laser spectroscopy: Temperature dependence of R (0) line in the ν4 band of CH4 perturbed by N2 and O2

M. Lepère; A. Valentin; A. Henry; C. Camy-Peyret; Marc Lengelé; J.C. Populaire; G. Blanquet

doi:10.1016/j.jms.2005.06.004

Diode-laser spectroscopy: Temperature dependence of R (0) line in the ν₄ band of CH₄ perturbed by N₂and O₂

M. Lepère, A. Valentin, A. Henry, C. Camy-Peyret, Marc Lengelé, J.C. Populaire, G. Blanquet

University of Namur

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper, we present a line profile study of the R (0) line in the ν band of methane diluted in nitrogen and oxygen, from room temperature to 153 K. The measurements were performed over a total pressure range from 14 to 128 mbar. The collisional broadening and narrowing (Dicke effect) coefficients are derived from a fit of the experimental spectra by using the soft and hard collision models, taking into account the Dicke effect. For higher pressures, we have fitted the data with a model taking into account simultaneously the Dicke narrowing and the speed dependence effect. Finally, we have deduced the parameter n of the temperature dependence (inverse power law) of the broadening coefficients for the CH-N and CH -O gas mixtures.

Original language	English
Pages (from-to)	86-92
Number of pages	7
Journal	Journal of molecular spectroscopy
Volume	233
Issue number	1
DOIs	https://doi.org/10.1016/j.jms.2005.06.004
Publication status	Published - 1 Sept 2005

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title = "Diode-laser spectroscopy: Temperature dependence of R (0) line in the ν4 band of CH4 perturbed by N2 and O2",

abstract = "In this paper, we present a line profile study of the R (0) line in the ν band of methane diluted in nitrogen and oxygen, from room temperature to 153 K. The measurements were performed over a total pressure range from 14 to 128 mbar. The collisional broadening and narrowing (Dicke effect) coefficients are derived from a fit of the experimental spectra by using the soft and hard collision models, taking into account the Dicke effect. For higher pressures, we have fitted the data with a model taking into account simultaneously the Dicke narrowing and the speed dependence effect. Finally, we have deduced the parameter n of the temperature dependence (inverse power law) of the broadening coefficients for the CH-N and CH -O gas mixtures.",

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T1 - Diode-laser spectroscopy

T2 - Temperature dependence of R (0) line in the ν4 band of CH4 perturbed by N2 and O2

AU - Lepère, M.

AU - Valentin, A.

AU - Henry, A.

AU - Camy-Peyret, C.

AU - Lengelé, Marc

AU - Populaire, J.C.

AU - Blanquet, G.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - In this paper, we present a line profile study of the R (0) line in the ν band of methane diluted in nitrogen and oxygen, from room temperature to 153 K. The measurements were performed over a total pressure range from 14 to 128 mbar. The collisional broadening and narrowing (Dicke effect) coefficients are derived from a fit of the experimental spectra by using the soft and hard collision models, taking into account the Dicke effect. For higher pressures, we have fitted the data with a model taking into account simultaneously the Dicke narrowing and the speed dependence effect. Finally, we have deduced the parameter n of the temperature dependence (inverse power law) of the broadening coefficients for the CH-N and CH -O gas mixtures.

AB - In this paper, we present a line profile study of the R (0) line in the ν band of methane diluted in nitrogen and oxygen, from room temperature to 153 K. The measurements were performed over a total pressure range from 14 to 128 mbar. The collisional broadening and narrowing (Dicke effect) coefficients are derived from a fit of the experimental spectra by using the soft and hard collision models, taking into account the Dicke effect. For higher pressures, we have fitted the data with a model taking into account simultaneously the Dicke narrowing and the speed dependence effect. Finally, we have deduced the parameter n of the temperature dependence (inverse power law) of the broadening coefficients for the CH-N and CH -O gas mixtures.

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DO - 10.1016/j.jms.2005.06.004

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JO - Journal of molecular spectroscopy

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Diode-laser spectroscopy: Temperature dependence of R (0) line in the ν₄ band of CH₄ perturbed by N₂and O₂

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