Rare-earth halide scintillating material and application thereof

Patent metadata

Field	Value
Publication number	US-11512251-B2
Application number	US-201816620850-A
Country	US
Kind code	B2
Filing date	Oct 15, 2018
Priority date	Dec 27, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

The present invention provides a rare-earth halide scintillating material and application thereof. The rare-earth halide scintillating material has a chemical formula of REaCebX3, wherein RE is a rare-earth element La, Gd, Lu or Y, X is one or two of halogens Cl, Br and I, 0≤a≤1.1, 0.01≤b≤1.1, and 1.0001≤a+b≤1.2. By taking a +2 valent rare-earth halide having the same composition as a dopant to replace a heterogeneous alkaline earth metal halide in the prior art for doping, the rare-earth halide scintillating material is relatively short of a halogen ion. The apparent valence state of a rare-earth ion is between +2 and +3. The rare-earth halide scintillating material belongs to non-stoichiometric compounds, but still retains a crystal structure of an original stoichiometric compound, and has more excellent energy resolution and energy response linearity than the stoichiometric compound.

First claim

What is claimed is:

1. A rare-earth halide scintillating material having a chemical formula of RE a Ce b X 3 , wherein RE is a rare-earth element La, Gd, Lu or Y, X is one or two of halogens Cl, Br and I, 0.9≤a≤1, 0.02≤b≤0.2, and 1.0001≤a+b≤1.1.

2. The rare-earth halide scintillating material according to claim 1 , wherein RE is La, and X is Br.

3. The rare-earth halide scintillating material according to claim 1 , wherein RE is La, and X is Cl.

4. The rare-earth halide scintillating material according to claim 1 , wherein RE is Gd, Lu ear Y, and X is I.

5. The rare-earth halide scintillating material according to claim 1 , wherein the scintillating material is a single crystal.

6. The rare-earth halide scintillating material according to claim 5 , wherein the rare-earth halide scintillating material is obtained by the Bridgeman-Stockbarge method.

7. A scintillation detector, comprising a scintillating material, wherein the scintillating material is the rare-earth halide scintillating material of claim 1 .

8. A positron emission tomography, a gamma spectrometer, an oil logging instrument or a lithology scanning imager, comprising the scintillation detector of claim 7 .

9. The scintillation detector according to claim 7 , wherein RE is La, and X is Br.

10. The scintillation detector according to claim 7 , wherein RE is La, and X is Cl.

11. The scintillation detector according to claim 7 , wherein RE is Gd, Lu or Y, and X is I.

12. The rare-earth halide scintillating material according to claim 1 , wherein the scintillating material is a single crystal.

13. The rare-earth halide scintillating material according to claim 12 , wherein the rare-earth halide scintillating material is obtained by the Bridgeman-Stockbarge.

Assignees

• Grirem Advanced Mat Co Ltd
• Gen Res Inst Nonferrous Metals

Inventors

• Yu Jinqiu
• Diao Chengpeng
• Wu Hao
• Cui Lei
• He Huaqiang

Classifications

• C09K11/7719 Primary

  Halogenides (C09K11/7716 takes precedence) · CPC title

• C30B29/12

  Halides · CPC title

• E21B49/00

  Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells · CPC title

• G01T1/2023

  Selection of materials · CPC title

• G01T1/2985

  In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis); (using external radiation sources A61B6/02) · CPC title