A Study of Single Phase Formation, Scintillation and Optical Properties of Scheelite Calcium Tungstate Powders and High Optical Quality Single Crystal Minirods-I

Powders and high optical quality single crystal minirods of stoichiometric scheelite CaWO4 have been prepared by solid state reaction and floating zone methods, respectively, and their single phase formation, optical and scintillating properties have been evaluated by X-ray diffraction, optical absorption and radioluminescence measurements. All obtained results indicate that every sample is stoichiometric, while scintillation measurements reveal radioluminescence peaks at about 420 nm, 440 nm and 490 nm depending on the source of irradiation used. The single crystal samples exhibit higher radioluminescence light yield.

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