
%0 Journal Article
%A Williamson Jr, W 
%T Optical Potentials and Eikonal Approximations
%J Australian Journal of Physics
%D 1972/12/01
%V 25
%N 6
%P 643-650
%K 
%R https://doi.org/10.1071/PH720643
%U https://www.publish.csiro.au/paper/PH720643 
%X An intermediate and high energy scattering approximation is developed by approximating the sum of intermediate states of the target system and expanding the free particle propagator. The resulting expression plays the role of an optical potential and reduces to the eikonal approximation if the average of the excitation energy for the intermediate states is negligible in comparison with the energy of the incident particle. 
