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The recently discovered divergent term in the strong potential born approximation is shown to arise from an improper treatment of elastic scattering in intermediate states. Improved treatment of the intermediates states eliminates the divergent term. In effect, the Coulomb Green's function of SPB theory is replaced by a modified Coulomb Green's function which omits the intermediate elastic scattering state.
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J. H. Macek (1985) studied this question.
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