Color centers in Cu-doped Bi12SiO20 crystals

Color Centers in Doped Bi12GeO20Crystals Irradiated by Gamma Quanta with High Dose

“…Additionally, practically the same character of absorption changes were early observed for mercury light illumination of BGO:Cu crystal and in BSO:Cu exposed to 20W halogen Philips Capsuleline Pro lamp [7,8]. It was shown [8] that this characteristic AA occurs under such illumination due to reducing of Cu 2+ ions to Cu + ions (Cu 2+ + e − → Cu + ). The sharp peaks in the region 23,000-25,000 cm −1 are due to the unstability of the spectrophotometer.…”