Rare-earth halide scintillating material and application thereof

Patent metadata

Field	Value
Publication number	US-2020318005-A1
Application number	US-201816620850-A
Country	US
Kind code	A1
Filing date	Oct 15, 2018
Priority date	Dec 27, 2017
Publication date	Oct 8, 2020
Grant date	—

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 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≤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

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≤a≤1.1, 0.01≤b≤1.1, and 1.0001≤a+b≤1.2.

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 or Y, and X is I.

5 . The rare-earth halide scintillating material according to claim 1 , wherein 0.9≤a≤1, 0.02≤b≤0.2, and 1.0001≤a+b≤1.1.

6 . The rare-earth halide scintillating material according to claim 1 , wherein a=0, and 1.0001≤b≤1.1.

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

8 . The rare-earth halide scintillating material according to claim 7 , wherein the rare-earth halide scintillating material is obtained by the Bridgeman-Stockbarge method.

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

10 . A positron emission tomography, a gamma spectrometer, an oil logging instrument or a lithology scanning imager, comprising the scintillation detector of claim 9 .

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

12 . The scintillation detector according to claim 9 , wherein RE is La, and X is Cl.

13 . The scintillation detector according to claim 9 , wherein RE is Gd, Lu or Y, and X is I.

14 . The scintillation detector according to claim 9 , wherein 0.9≤a≤1, 0.02≤b≤0.2, and 1.0001≤a+b≤1.1.

15 . The scintillation detector according to claim 9 , wherein a=0, and 1.0001≤b≤1.1.

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

17 . The rare-earth halide scintillating material according to claim 16 , 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

• E21B47/00

  Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B21/08) · CPC title

• C30B11/00

  Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method (C30B13/00, C30B15/00, C30B17/00, C30B19/00 take precedence; under a protective fluid C30B27/00) · CPC title

• G01T1/2023

  Selection of materials · CPC title

• C01P2002/54

  one element only · CPC title