LINE MIXING AND LINE BROADENING IN CO2 BANDS PERTURBED BY HELIUM AT 193 K

The v(2) and 3 v(3) bands of CO2 in helium baths at 193 K have been st udied with a Fourier transform interferometer. The behavior of the ban d shapes has been explored at moderate densities. The energy corrected sudden (ECS) approximation is used to model the relaxation matrix in order to account for line mixing effects. The basis cross-sections wer e calculated with the simple power law (P). Computed spectra are in go od agreement with the observed ones, Measured broadening coefficients are also comparable with the ones derived from the ECS-P model.