Abstract
High resolution crossed molecular beam measurements of diffraction oscillations for some atom-atom and atom-diatom systems in the thermal energy range are reported. From the observation of a well resolved diffraction structure in the Ne-Ne, Ar, Kr and Xe systems a refinement or assessment of the corresponding interatomic potentials to better than 1% has been obtained. From the simultaneous best-fit, within the infinite-order-sudden approximation, of the diffraction data, and of absolute total integral cross sections and second virial coefficients from literature, rather accurate potential energy surfaces for the He-N2, O2 and NO systems have been derived.
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