Approximations to the Systematic Many‐Beam Case of High‐Energy Electron Diffraction. II. Improved Three‐Beam and Four‐Beam Solutions and Extinction Data
Abstract:Kinematical many-beam corrections t o the dynamical three-beam and four-beam approximations are derived analytically. The solutions yield refined extinction lengths and Bloch-wave excitation coefficients tabulated for a variety of crystals and accelerating voltages (100 kV t o 1 MV). Moreover, the results are used to analyse three-beam and four-beam features of electron transmission and anomalous absorption, and to represent many-beam influences t o criticalvoltage effects.Es werden kinematische Mehrstrahl-Iio… Show more
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