Comparison of the coupled states,infinite order sudden,and exponential born methods for ArCsF collisions

The CS(coupled states), EB (exponential Born), and IOS (infinite order sudden) methods are used to calculate opacity functions for elastic and rotationally inelastic scattering of CsF by Ar at an energy of 87.7 meV. The EB and IOS methods are also used to calculate integral cross sections for this system. The results of all three methods are in reasonable agreement while the CS and IOS opacities agree remarkably well. Most of the scattering for for the low-lying inelastic transitions is seen to result primarily from the intermediate to long-range parts of the model potential hypersurface.