Optical theorem for heavy-ion scattering. [Scattering amplitudes, cross sections]

An heuristic derivation is given of an equivalent of the optical theorem stated in the charged situation with the remainder or nuclear elastic scattering amplitude defined as a difference of elastic and Coulomb amplitudes. To test the detailed behavior of this elastic scattering amplitude and the cross section, calculations were performed for elastic scattering of /sup 18/O + /sup 58/Ni, /sup 136/Xe + /sup 209/Bi, /sup 84/Kr + /sup 208/Pb, and /sup 11/B + /sup 26/Mg at 63.42 to 114 MeV. (JFP)