Study of Nucleon-Nucleus Elastic Scattering in Second-Order Multiple-Scattering Theory

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Abstract
Nucleon-nucleus scattering is studied in the energy range 95-350 MeV for targets ranging from carbon to lead. The relative importance of the first and second order terms in Watson's multiple-scattering expansion of the optical potential in terms of the two-nucleon scattering matrix is investigated with the nucleon-nucleon phase parameters obtained at Yale. Effects of including the angular dependence of the two-nucleon amplitudes, as Cromer has done, are compared with those of the second-order potential, and they are found to be equally important so that both must be included for consistency. The possibility of investigating nuclear-structure parameters, especially the two-nucleon correlation lengths brought in by the second-order potential, is considered.