CO2 pressure broadening and shift coefficients for the 2–0 band of 12C16O

• DOI: 10.1016/j.jms.2016.02.014
• Publication Date: 2016-02-21T19:01:36Z
• Authors: R. Hashemi; A. Predoi-Cross; A.S. Dudaryonok; N.N. Lavrentieva; A.C. Vandaele; J. Vander Auwera
• Keywords: Line (geometry)

Abstract Fourier transform absorption spectra of the 2–0 band of 12 C 16 O mixed with CO 2 have been recorded at total pressures from 156 to 1212 hPa and at 4 different temperatures between 240 K and 283 K. CO 2 pressure-induced line broadening and line shift coefficients, and the temperature dependence of the former have been measured including line mixing using a multi-spectrum non-linear least squares fitting technique. Different line shape models have been considered to take into account the Dicke narrowing or speed dependence effects. Measured line-shape parameters were compared with theoretical values, calculated for individual temperatures using a semi-empirical method and the Exponential Power Gap (EPG) law.