Landolt-Börnstein - Group III Condensed Matter Diffraction theories and methods


This chapter provides a brief introduction to diffraction theories and diffraction methods for electrons and positrons. The strong scattering power of matter for electrons and positrons is responsible for the complexity of description of diffraction from a crystal, particularly in the case of low energy. This is the main difference between low-energy electron diffraction (LEED) and X-ray diffraction. In the latter, an incident wave is considered to undergo just one scattering event inside the solid. The coherent combination of single scattering events from each atom is in general sufficient to describe photon interaction with a crystal (kinematic theory). In the case of electrons and positrons, the cross sections are various orders of magnitude greater than those of X-rays. The scattered intensity is very high and a substantial amount of multiple scattering is present. This leads to the need for dynamical theories.

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Title Diffraction theories and methods
Book Title
Interaction of Charged Particles and Atoms with Surfaces
6.1.1 Introduction
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Landolt-Börnstein - Group III Condensed Matter
  • G. Chiarotti
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  • E. Zanazzi
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