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Improvement of PbWO 4 Crystal Optical Properties

Sun Shangwen Han Aizheng (Department of Astronautic Electron and Opto Electronic Engineering, Harbin Institute of Technology, Harbin 150001) Li Minghua Xu Yuheng (Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150080)  
Oxygen vacancy defects and Fe 2+ impurity defects were produced in PbWO 4 crystal growth process due to oxygen deficient, which lead to the coloration of the crystal and the optical properties lower. Doped Sb 2O 3 into the crystal, the oxygen vacancy had been dispeled, and Fe 2+ had been oxidized to Fe 3+ which is colourless. The optical properties and the scintillation characteristics has been enhanced.
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