Infrared absorption by pure CO2 near 3340 cm(-1): Measurements and analysis of collisional coefficients and line-mixing effects at subatmospheric pressures

High resolution Fourier transform spectra of the 21102-00001 band of (CO2)-C-12-O-16 near 3340 cm(-1) have been recorded and analyzed to extract isolated-line intensities and collisional parameters, and first-order line-mixing coefficients. Voigt, hard-collision Rautian and Sobel'man, and quadratic-speed-dependent Voigt profiles have been used. The line-mixing coefficients measured for the three branches have also been evaluated using an Energy-Corrected Sudden approach employing a symmetric metric in the Liouville space. These coefficients compare very favorably with the experimental results and estimations with an algorithm available in the literature. Results of straightforward ECS-modeling of complete band shapes have been compared to the recorded spectra and future improvements of this model required at subatmospheric pressures have been outlined. (C) 2014 Elsevier Ltd. All rights reserved.