Scintillation Crystal Materials -- Cadmium Tungstate
Cadmium tungstate (CdWO 4 ) single crystal is a scintillation detector with excellent scintillation properties. Its X ray absorption coefficient is large, the luminous efficiency is high, the afterglow time is short, and the radiation damage resistance is strong. It has extremely important application value in the field of nuclear medicine, X-ray, CT and container detection. Cadmium tungstate (CdWO 4 ) single crystal belongs to the tungstenite structure (monoclinic), its melting point is 1289 °C, with excellent performance, high luminous efficiency and energy resolution. In the process of growth, the crystal is easy to crack because of the cleavage plane. In 1948, the optical properties of cadmium tungstate crystals were reported for the first time. In 1950, some scholars made the crystals by flame. They were yellow green, but they were of poor quality. . With the development of the preparation technology, it is possible to prepare large size cadmium tungstate single c...