Radiation Damage of Cerium Doped Lanthanum Bromide Crystal

摘要

In this paper, the radiation damage of the LaBr3: Ce crystals with different cerium doped concentration are investigated. One is the LaBr3: 3% Ce crystal. The sizes of this crystal reach to 11 mm × 11 mm × 13 mm. One is the LaBr3: 5 % Ce crystal. This crystal is a cylindrical crystal with sizes Φ 25 × 15 mm~3. The optical and scintillation properties of the LaBr3: Ce crystal, such as light output and energy resolution, were measured before and after γ-ray irradiations at different doses. The crystals both display lower photoelectron output and poorer energy resolution after irradiation