Abstract
Special features of the incorporation of a copper impurity into CsBr crystals are studied for different types of impurities (metallic copper, CuO, and CuBr2) and crystal-growth techniques (the Bridgman method or the method of isothermal evaporation from solution). The optical characteristics of these crystals (absorption, photoluminescence, and photostimulated-luminescence spectra) are investigated. The copper impurity is shown to enter CsBr:Cumet crystals in the monovalent state Cu+ and CsBr:CuO and CsBr:CuBr2 crystals in the divalent state Cu2+. It is found that the CsBr crystals doped with Cu+ and Cu2+ ions exhibit intense photostimulated luminescence and can be used as storage phosphors for visualization of X-ray images.
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