Abstract

A systematic computational study and Regge Pole (complex angular momentum) analysis of large-angle elastic scattering in chemically reactive systems has been carried out. Various new interference effects can appear in the large-angle scattering. In some cases, use of different parameters in the S matrix results in very similar angular distributions, which would lead to ambiguities in the fitting of experimental data. Up to 15 000 partial waves are used in the calculations but no more than three terms are necessary in the Regge Pole analysis for the large-angle scattering. A physical interpretation in terms of direct elastic scattering and surface waves that propagate around the region of chemical reaction can be given. Experimental criteria for the detection of the interference effects are discussed.

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