Relativistic correction of atomic scattering factors for high-energy electron diffraction
DOI: https://doi.org/10.1107/S2053273319012191
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9427
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9427
Lentzen, Markus, 2019: Relativistic correction of atomic scattering factors for high-energy electron diffraction. In: Acta Crystallographica Section A, Band 75, 6: 861 - 865, DOI: 10.1107/S2053273319012191.
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Relativistic electron diffraction depends on linear and quadratic terms in the electric potential, the latter being neglected in the frequently used relativistically corrected Schrödinger equation. The quadratic electric potential term modifies atomic scattering amplitudes in particular for large-angle scattering and backscattering. The respective correction increases with increasing scattering angle, increasing atomic number and increasing kinetic energy. Conventional tabulations for electron scattering and its large-angle extrapolations can be amended in closed form by a universal correction based on the screened Coulomb potential squared.
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