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Line shape parameters measurement and computations for self-broadened carbon dioxide transitions in the 30012 ← 00001 and 30013 ← 00001 bands, line mixing, and speed dependence |
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| Authors: | A Predoi-Cross AV Unni I Schofield ARW McKellar |
| Institution: | a Physics Department, University of Lethbridge, 4401 University Drive, 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: | Transitions of pure carbon dioxide have been measured using a Fourier transform spectrometer in the 30012 ← 00001 and 30013 ← 00001 vibrational bands. The room temperature spectra, recorded at a resolution of 0.008 cm−1, were analyzed using the Voigt model and a Speed Dependent Voigt line shape model that includes a pressure dependent narrowing parameter. Intensities, self-induced pressure broadening, shifts, and weak line mixing coefficients are determined. 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 Line shapes Self-broadening Self-line mixing Self-shift Fourier transform infrared spectroscopy (FTIR) |
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