Abstract
The first centrifugal sudden (CS) calculations of glory undulations in total integral cross sections have been carried out for Ar-N2 in the velocity range g=501·2-3258·4 m s-1. A model Lennard-Jones (12, 6) interaction potential with P 2(cos ϑ) anisotropy has been used and N2 is assumed to be a rigid rotor. Close coupling (CC) calculations at three velocities have also been performed. The CS and CC calculations are used to assess the reliability of the much simpler infinite order sudden (IOS) approximation. It is found that the IOS method is a reliable technique for analysing glory undulations in the total integral cross section of Ar-N2. The calculations are relevant to recent precise experimental measurements of glory undulations for atom-molecule collision systems.
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