Explanation of resonance broadening of the 16O(α,α)16O reaction for He ion channeling in oxides

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Abstract

The scattering cross section of the elastic resonance of 3.045 MeV 4He with 16O displays an increased half-width under channeling conditions. We explain this effect and demonstrate its correct application for the measurement of the difference in stopping for channeled and randomly incident He ions, as they are used for Rutherford backscattering spectroscopy (RBS) for LiNbO3 and KNbO3 single crystals.

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