| abstract |
Provided are rare earth halide scintillation materials and their applications. The chemical formula of the rare earth halide scintillation material is RE a Ce b X 3 . Here, RE is a rare earth element La, Gd, Lu or Y, X is one or two of halogen Cl, Br and I, and 0≦a≦1.0, 0.01≦b≦ 1.1 and 1.0001≦a+b≦1.2. Instead of the different alkaline earth metal halide in the prior art, +2 valent rare earth halide having the same composition is used as a dopant, and the doping is carried out to make halogen ions in the rare earth halide scintillation material deficient, thereby The apparent valence state is between +2 and +3 valences, and although it is a non-stoichiometric compound, it can retain the crystal structure itself of the original stoichiometric compound and is a stoichiometric compound. It has better energy resolution and energy response linearity. |