GAS PHASE EPR LINEWIDTHS AND INTERMOLECULAR POTENTIALS

Abstract

Measurements on line broadening collision cross-sections have been carried out using gas phase EPR techniques, A number of simple systems involving halogen atoms and molecules and inert gases have been investigated. The measured cross-sections show a dependence on the magnetic quantum number, thus indicating an anisotropy in the intermolecular potential. Very large differences in cross-sections for different fine structure states are also observed. Detailed comparisons between the experimental results and theoretical predictions are possible.