Quality control of strongly ionized crystals, whereby high energy radiation is used to generated electron-hole pairs in the crystal and the corresponding absorption spectrum measured

摘要

Quality control method, especially for strongly ionized crystals, in which a crystal (14) is irradiated with electromagnetic radiation (13) and reflected radiation (15) within a given wavelength bandwidth is detected. The bandwidth includes an absorption range in which the radiation is absorbed to form electron-hole pairs, with a resultant broad absorption peak detected in the spectrum of the reflected radiation. The width of the peak indicates the quality of the crystal.