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Pressure-induced line broadening for the (30012)←(00001) band of CO2 measured with tunable diode laser photoacoustic spectroscopy
Authors:J.S. Li  K. Liu  W.D. Chen
Affiliation:a Environmental Spectroscopy Laboratory, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
b Laboratoire de Physicochimie de l’Atmosphère, Université du littoral Côte d’Opale, 145 AV. Maurice Schumann, 59140 Dunkerque, France
Abstract:Pressure-induced foreign-broadening lineshape parameters of the carbon dioxide rovibrational transitions belonging to the (30012)←(00001) overtone band near the 1.573 μm wavelength region are measured by using a tunable diode laser photoacoustic spectrometer. The spectroscopic analysis has concerned the first 11 lines of the R branch. For these lines, the air- and Ar-broadening coefficients are measured at room temperature (∼298 K). The measured broadening coefficients of all the transitions of 12C16O2 are compared with those given in the HITRAN04 database and former measurements with a different spectroscopic method. Agreements and discrepancies are underlined and briefly discussed. The recorded lineshapes are fitted with standard Voigt line profiles in order to determine the collisional broadening coefficient of carbon dioxide transitions.
Keywords:CO2   Near-infrared spectra   Photoacoustic spectroscopy   Spectral lines parameters
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