Article
Article
Channeling in solids
Article By:
Davies, John A. Institute for Materials Research, McMaster University, Hamilton, Ontario, Canada.
Swanson, M. L. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.124500
The steering of positively charged energetic particles between atomic rows or planes of a crystalline solid. The particles can be positive ions, protons, positrons, or muons. If the angle between the direction of the particle and a particular axis or plane in the crystal is within a small predictable limit (typically a few degrees or less), then the gradually changing electrostatic repulsion between the particle and each successive atomic nucleus of the crystal produces a smooth steering through the crystal lattice (Fig. 1). Thus, the trajectory of the channeled particle is restricted to the open spaces between atomic rows and planes of a crystal (Fig. 2). See also: Crystal structure
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