Rotational energy transfer and anisotropic intermolecular potentials : confrontation of experiment with ab-initio calculations for CO-H 2 and CO-He

Abstract

A tunable diode lase in the 4.7 μm region has been used to perform measurements of pressure-broadening in infrared lines of CO(v = 1 ←0) perturbed by H 2 and He at liquid nitrogen and room temperatures. For the COH 2 system the experimental results are compared to previous double resonance data and to ab-initio quantum calculations. The COHe data make a confrontation of the two available potential energy surfaces feasible.