The axial and planar channeling of 1.6 MeV He in α-Al2O3 crystals has been studied at room temperature. The experimental results have been compared with the theoretical evaluation following Gemmell-Mikkelson generalization of Barrett's formulas and the Varelas-Sizmann treatment. The agreement between experimental and theoretical results is good if the distortion of the oxygen sublattice, typical of the corundum structure, is taken into account by a simple procedure.
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Carnera et al. (1978) studied this question.
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