CO2-broadening coefficients in the ν4 fundamental band of methane at room temperature and application to CO2-rich planetary atmospheres

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Using a tunable diode-laser spectrometer, we have measured the CO 2-broadening coefficients of 28 absorption lines in the ν4 band of CH4. Each line was recorded at room temperature (296 K) and at 4 different pressures, ranging from 8 to 50 mbar. The experimental determination of the CO2-broadening coefficients was performed by fitting a theoretical profile to the experimental profile of each line recorded at each pressure. Voigt, Rautian-Sobel'man and Galatry models were therefore used. The impact of these determinations on atmospheric investigations on CO2-rich planetary atmospheres are addressed. © 2014 Elsevier Inc. All rights reserved.

langue originaleAnglais
Pages (de - à)35-40
Nombre de pages6
journalJournal of molecular spectroscopy
Date de mise en ligne précoce14 janv. 2014
Les DOIs
étatPublié - 1 mars 2014

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