Abstract
Positive heavy particles (protons, α-particles, etc.) which propagate in a crystal lattice parallel or almost parallel with a dense axis or plane will be constrained to move along this direction for long distances owing to steering collisions with the atoms constituting the channel walls. Their relatively stable oscillating trajectories follow a potential valley described by low electronic charge density. These particles have longer paths than those propagating in an arbitrary direction (“random trajectory”) and are said to be channelled. As this phenomena has many important applications, the main theoretical and experimental results obtained in two laboratories of the Commissariat à l'Energie Atomique (CEA) concerning the effect of crystal defects on channelling and the utilization of channelling to determine the lattice location of hydrogen in face-centred cubic crystals are given herein.
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Mory, J., Ligeon, E. Studies on dechannelling by defects and on lattice site location of hydrogen in face-centred cubic metals. J Mater Sci 17, 925–935 (1982). https://doi.org/10.1007/BF00543510
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DOI: https://doi.org/10.1007/BF00543510