Streuung mittelschneller Elektronen um kleinste Winkel — Vergleich von Absolutmessungen an Gasen mit theoretischen Ergebnissen nach Lenz

Abstract

During the last years several experiments on small angle scattering have been made the results of which are not in agreement withLenz's theoretical results commonly used in electron microscopy. These measurements having been made on foils, a possible reason for the discrepancies seemed to be that scattering did not take place on isolated, spherical, neutral atoms as theory assumes. These conditions were fulfilled, however, at the experiments of the following paper. In spite of this there is no agreement with theoretical results basing onLenz's scattering cross sections except in the case of neon, whereLenz's cross sections give very reliable values. The discrepancies are shown not to be explainable by a breakdown ofBorn's approximation as seems to be obvious because of the systematic increase of the discrepancies with atomic number.