Bestimmung der Wirkungsquerschnitte für die Kleinstwinkelstreuung von Elektronen

Abstract

Cross sections for small angle scattering of electrons are determined from the absolute measurements of the foregoing paper.Lenz's approximation of the cross sections proves to be valid but in a very limited angular range for most elements. Deviations from results calculated withLenz's theory can be ascribed to this reason in all in vestigated cases. Determination of the cross sections shows that the Thomas-Fermi-Dirac-model describes small angle scattering much better than is commonly assumed, disregarding a very small range near the angle 0 into which but a very small portion of the electrons is scattered.Lenz's method, however, yields only in special cases the correct cross sections and must not be as commonly used as is general practice.