Rare earth halide scintillating material and application thereof

Abstract

The invention provides a rare earth halide scintillating material and application thereof. The general chemical formula of the rare earth halide scintillating material is REaCebX3, wherein RE is a rare earth element La, Gd, Lu or Y, X is one or two of halogens Cl, Br and I, a is more than or equal to 0 and less than or equal to 1.0, b is more than or equal to 0.01 and less than or equal to 1.1, and the sum of a and b is more than or equal to 1.0001 and less than or equal to 1.2. A rare earth halide having a +2 valence and with the same component is used as a doping agent to replace a heterogeneous alkaline earth metal halide in the prior art for doping, and therefore, the rare earth halide scintillating material is relatively short of halogen ions, the apparent valence of the rare earth ions is between +2 and +3, the rare earth halide scintillating material belongs to a non-stoichiometric compound, but the crystal structure of the original stoichiometric compound is still maintained, and the rare earth halide scintillating material has more excellent energy resolution and energy response linearity than the stoichiometric compound.

Description

technical field [0001] The invention relates to the field of inorganic scintillation materials, in particular to a rare earth halide scintillation material and its application. Background technique [0002] Scintillation materials can be used to detect high-energy rays such as α-rays, γ-rays, and X-rays, and high-energy particles such as neutrons, and are widely used in nuclear medicine, high-energy physics, safety inspection, oil logging and other fields. [0003] Scintillation materials are usually applied in the form of single crystals, and in some cases can also be ceramics or other forms. Different application fields have different performance requirements for scintillation materials. However, for most applications, scintillation materials are expected to have as high a light yield as possible, as short a decay time as possible, and as high an energy resolution as possible. Especially for nuclear medicine imaging devices such as positron emission tomography (PET) scan...

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Problems solved by technology

However, this scheme also has its disadvantages, that is, the components are relatively complex, and the consistency of crystal scintillation performance will be poor due to the uneven distribution of different ions.

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