CO2-broadened half-widths and CO2-induced line shifts of 12C16O relevant to the atmospheric spectra of Venus and Mars

CO2-broadened half-widths and CO2-induced line shifts were measured in the fundamental (1-0) of 12C16O at 201, 244, and 300K using a Fourier-transform spectrometer and a multi-spectral-line-fitting technique. The parameters were also measured in the first (2-0) overtone and the second (3-0) overtone bands at 298K. While the line widths are practically the same in the three bands, there is significant variation of the collision-induced line shifts with the vibrational quantum number of the upper energy level.