Energy dependence of dechanneling by a dislocation loop

The energy dependence of dechanneling due to a circular dislocation loop was investigated by a dechanneling model previously proposed by the author. Numerical calculations based on this model show that the dechanneling width, i.e., the dechanneling cross section per length of a dislocation loop, increases with the square root of the ion energy in the low-energy region, and that it has a constant value determined by the maximum displacements of the atomic rows located near the loop in the high-energy region. Analytical considerations also conclude that the energy region where the dechanneling width is proportional to the square root of the ion energy expands proportionally to the square of the radius of the loop, and that the dechanneling width in the high-energy region is proportional to the radius of the loop