-Luminescence properties of a pure CdWO 4 crystal and a CdWO 4 :Mo crystal doped with molybdenum in different concentrations have been investigated. The effect of molybdenum impurity on the intrinsic luminescence of CdWO 4 has been found, and the role of the impurity in the formation of new luminescence centers has been investigated. The features of the formation of the intrinsic and impurity luminescence excitation spectra of CdWO 4 and CdWO 4 :Mo crystals in the fundamental-absorption region have been considered. The reflection spectra of the CdWO 4 crystal have been investigated taking into account the crystal structure anisotropy. PACS numbers: 78.55.-m, 78.40.-q
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