Half-width calculations for CO lines broadened by CO2

Half-widths of CO lines, in the fundamental and first overtone bands, broadened by CO₂ have been computed using the Anderson-Tsao-Curnutte theory. Comparison with the high-resolution measurements of Varanasi at 295°K shows excellent prediction of line widths by the theory. Comparison is also made between calculations including dipole-quadrupole and quadrupole-quadrupole interactions with those taking only the dominant quadrupole-quadrupole forces into account. Line widthd at 295°K range from 0.126417 cm^-1 atm^-1 fom m = 1 to 0.04397 cm^-1atm^-1 for m = 32, which corresponds to the asymptonic kinetic-theory value. Half-width computations are also presented at 200°K and 250°K appropriate for Martian and Venusian atmospheres, respectively.