Summary of radiation damage and recovery about BGO scintillation crystals

This paper introduced the light emitting principle of BGO (Bi₄Ge₃O₁₂) scintillation crystals, and irradiation experiments at home and abroad. It analyzed the change about the irradiated transmission rate, relative light output and absorption coefficient before and after irradiated. Analysis showed that the main factor of BGO scintillation crystals radiation damage was the capture color center, and could recover by annealing and photon radiation. It introduced the method of improving irradiation resistance of BGO scintillation crystal, and pointed out that doping and changing the crystal growth method were the most important method to improve the radiation resistance properties of crystals. (authors)