Experimental Determination of the Correlation Effects in the Total Differential Electron Cross Section. I. Ne

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Abstract
The relative total differential electron cross section (elastic plus inelastic scattering) for Ne was measured with an accuracy of 0.25%. The experimental data were compared with scattering factors calculated with the first Born approximation using a Hartree-Fock wave function and a configuration-interaction wave function giving 86% of the atomic electronic correlation energy. The comparison is in very good agreement with the recently published first-Born-approximation scattering factors employing this configuration-interaction wave function. The measurements prove that electron diffraction can be a useful experimental tool for studying correlation effects on the scattered intensity with an accuracy of at least 20% in atoms and molecules.