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Elastic scattering measurements have been carried out with electrons in Au^197 at energies of 84, 126, 154, and 183 Mev and in Pb^208 at 84, 153, and 186 Mev. Diffraction effects are observed which appear to vary with momentum and angular position as if a fundamental parameter psin (2) were equal to constant for a given diffraction feature. Such a behavior would be predicted by the Born approximation. A comparison of the scattering in Au^197 and Pb^208 suggests that inelastic scattering does not materially influence the scattering curves presented. The appearance of diffraction effects indicates a model more nearly uniform in charge density than early tentative conclusions based on Born approximation calculations.
Hofstadter et al. (Thu,) studied this question.