The effect of irradiation on IR peaks in corundum at about 2850, 2920 and 2955 cm−1

The IR transmission spectrum of the irradiated and unirradiated doped corundum is analyzed in this paper. Three new IR peaks have been found. The peaks notably intensified in the spectrum of proton irradiated sample. However, in the spectrum of the sample irradiated by an atomic reactor, the peaks of the doped Cu sample notably intensified only. It shows that the (OH)− vibration and cation void in the crystal relate the peaks. It is concluded that the doping Cu in the crystal would affect seriously the crystal quality.