Argon-broadened CO2 linewidths at high J values

Abstract We present experimental collision-broadening coefficients at high J values obtained in the ν 3 band of CO 2 pressurised by argon. They were determined by Fourier transform spectroscopy at room temperature for pressures up to 2 atm. We review recent experimental and theoretical data and compare them with calculations performed by using the energy corrected sudden (ECS) approximation. The present extended measurements allow a better determination of the basic parameters which are required to model the line coupling induced by collision within this formalism.