Crystal Growth and Scintillation Properties of CeCl_3 Doped LaBr_3 Crystal with 2-inch Diameter

LaBr3 crystals doped with CeCl3(LBC crystals for short) were grown from the melt of powders in vacuum-sealed fused silica crucibles by modified Bridgman technique.LBC crystal with the size of 50 mm×50 mm and 5 mole% CeCl3 was successfully made.And X-ray excited luminescence,light yield,decay time and energy resolution of the relative samples were measured at room temperature.The results show that the LBC crystal has strong emissions peaking at 365 nm and 385 nm under X-ray excitation,and that it has also excellent scintillation properties with the energy resolution of 3.1% under γ-ray excitation of 137 Cs radioactive source,the light yield of about 156% of NaI(Tl),and the decay time of 17 ns.