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Line profile study of transitions in the 30012 ← 00001 and 30013 ← 00001 bands of carbon dioxide perturbed by air |
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| Authors: | A Predoi-Cross W Liu AV Unni ARW McKellar |
| Institution: | a Physics Department, University of Lethbridge, Lethbridge, AB, Canada T1K 3M4 b Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, ON, Canada K1A 0R6 c Service de Chimie Quantique et Photophysique, Université Libre de Bruxelles, 50 Av. F.D. Roosevelt, cp160/09, B-1050 Bruxelles, Belgium |
| Abstract: | In this work we present a line profile study for air-broadened carbon dioxide transitions in the 30012 ← 00001 and 30013 ← 00001 vibrational bands. The room temperature spectra were recorded at a resolution of 0.008 cm−1 using a Fourier Transform spectrometer. The air-broadening, air-shift, and air-line mixing coefficients were derived from a simultaneous fitting of spectra using the Voigt model and a Speed-Dependent Voigt lineshape model. The results obtained are consistent with other studies in addition to the theoretically calculated values. Exponential Power Gap (EPG) and Energy Corrected Sudden (ECS) scaling laws were used to calculate the relaxation matrix elements. |
| Keywords: | Carbon dioxide Lineshapes Air-broadening Air-line mixing Air-shift Fourier transform infrared spectroscopy |
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