Abstract
The dechannelling of fast ions by lattice distortion in crystals is studied by a simple modification of the continuum model of channelling. The results show that the dechannelling cross section by a dislocation is proportional to the square root of the ion energy. The dechannelling probability of He + and H + ions near dislocations in several crystals are calculated. The calculated results are compared with the observed dechannelling rates of He + ions in irradiated KBr crystals and those of He + ions in irradiated Au crystals.
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