The fixed energy Dirac equation using scalar plus fourth component vector potentials is solved in the eikonal limit. The Dirac-eikonal amplitude can be written in the familiar integral over impact parameter form. Results of model calculations using the Dirac-eikonal amplitude are compared with those of a partial wave solution for parameters appropriate to intermediate energy proton nucleus scattering.

NUCLEAR REACTIONS Intermediate energy. Dirac-eikonal amplitude, Dirac impulse approximation.

• Received 10 June 1983

DOI:https://doi.org/10.1103/PhysRevC.28.1663