MEASUREMENT OF N2-COLLISIONAL SHIFT COEFFICIENTS OF METHANE LINES IN THE ν3 BAND AT HIGH TEMPERATURES

Bastien Vispoel, Nicolas Hespel, Claude Populaire, Muriel Lepère

Research output: Contribution to conferencePoster

Abstract

The study of thespectral parameters, and their variations with temperature and pressure, ofmethane lines is important for the remote sensing of atmospheres [1].Methane is a minor component of the terrestrial atmosphere and his impact isimportant (methane is the third most abundant greenhouse gas [2]).Furthermore, methane is also present in the atmosphere of others planets [3-5]and stellar objects [6,7].

 

In this work,the collisional shift of absorption lines in the ν3 band of methanehas been measured for several high temperatures (up to 600 K). This studyhas been made with a two-beams tunable diode-laser spectrometer.

 

The collisionalline shift has been determined using a procedure described elsewhere [8].So far we know, there is not a general law for the temperature dependence ofthe collisional line shift commonly used in the literature [9]. Knowingthat, different laws have been tested to determine the temperature dependenceof the line shift. The observations will be discussed.


[1]   J.-M. Flaud, H. Oelhaf, C. R. Physique 5, 259-271 (2004)

[2]   D.J. Wuebbles, K. Hayhoe, Earth-Science Reviews 57, 177-210 (2002)

[3]   E. Karkoschka, M.G. Tomasko, Icarus 211, 780-797 (2011)

[4]   E. Karkoschka, M. Tomasko, Icarus 202, 287-309 (2009)

[5]   I. de Pater, J.J. Lissauer, PlanetarySciences. Cambridge university press, Second Edition (2011)

[6]   V. Boudon, J.-P. Champion, T. Gabard, M.Loëte, A. Coustenis, C. De Bergh, B. Bézard, E. Lellouche, P. Drossart, M.Hirtig, A. Negrão, and C.A. Griffith, Société Française de Physique – Sciencesde la Matière et Technologies, Société française de physique 11, 13-16 (2008)

[7]   E.L. Gibb, M.J. Mumma, N. Dello Russo, M.A.DiSanti, K. Magee-Sauer, Icarus 165,391-406 (2003)

[8]   B. Vispoel, M. Dhyne, J.-C. Populaire, G. Blanquet,M. Lepère, J. of Mol. Spectrosc. 298, 7-10 (2014)

[9]   R.R. Gamache, J. Lamouroux, V. Blot-Lafon, E.Lopes, J. Quant. Spectrosc. and Radiat.Transfer 135, 30-43 (2014)

Original languageEnglish
Publication statusPublished - 2 Sep 2014
EventThe 23rd International Conference on High Resolution Molecular Spectroscopy - Bologne, Italy
Duration: 2 Sep 20146 Sep 2014

Conference

ConferenceThe 23rd International Conference on High Resolution Molecular Spectroscopy
CountryItaly
CityBologne
Period2/09/146/09/14

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    Vispoel, B., Hespel, N., Populaire, C., & Lepère, M. (2014). MEASUREMENT OF N2-COLLISIONAL SHIFT COEFFICIENTS OF METHANE LINES IN THE ν3 BAND AT HIGH TEMPERATURES. Poster session presented at The 23rd International Conference on High Resolution Molecular Spectroscopy, Bologne, Italy.