Rotational rainbow scattering with large Δ j: Energy dependence of the anisotropy of the Na2–Ne, Ar interaction potential

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Abstract
Differential cross sections for rotational transitions in Na2–Ne, Ar collisions are measured up to very large Δj. It is shown that the energy dependent anisotropy ΔR(E) of the interaction potential can be determined from these data using simple classical relations of ΔR and the rainbow angle θR. Excellent agreement with ab initio data is demonstrated and underlines the usefulness of this concept.