Channeling in solids
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
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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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