Intrinsic and activated A4BX6 scintillators

Patent metadata

Field	Value
Publication number	US-10351768-B2
Application number	US-201615352566-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	Nov 18, 2015
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

Mixed halide scintillation materials of a first general formula A4B(1-y)MyX′6(1-z)X″6z and a second general formula A(4-y)BMyX′6(1-z)X″6z are disclosed. In the general formulas, A is an alkali metal, B is an alkaline earth metal, and X′ and X″ are two different halogen atoms. Scintillation materials of the first general formula include a divalent external activator M such as Eu2+ or Yb2+ or a trivalent external activator M such as Ce3+. Scintillation materials of the second general formula include a monovalent external activator M such as In+, Na+, or Tl+ or a trivalent external activator such as Ce3+.

First claim

What is claimed is:

1. A scintillator comprising a chemical compound having the chemical formula
A 4 B (1-y) M y X′ 6(1-z) X″ 6z , wherein

0≤y≤1,
0≤z≤1,
M is Eu,
X′ is Br or I, and
X″ is different from X′ and is one of F, Cl, Br, and I, or any combination thereof, and wherein
A is Cs, B is Ca, X′ is I, M is Eu, and z=0; or
A is Cs, B is Ca, X′ is Br, X″ is I, M is Eu, and z=5/6; or
A is Cs, B is Ca, X′ is Br, M is Eu, and z=0; or
A is K, B is Sr, X′ is I, M is Eu, and z=0; or
A is a combination of Cs and K, B is Ca, X′ is I, M is Eu, and z=0; or
A is Cs, B is Ca, X′ is I, y=0, and z=0.

2. The scintillator of claim 1 , wherein M is Eu 2+ .

3. The scintillator of claim 1 , wherein A is Cs, B is Ca, X′ is I, M is Eu, and z=0.

4. The scintillator of claim 1 , wherein A is Cs, B is Ca, X′ is Br, X″ is I, M is Eu, and z=5/6.

5. The scintillator of claim 1 , wherein A is Cs, B is Ca, X′ is Br, M is Eu, and z=0.

6. The scintillator of claim 1 , wherein A is K, B is Sr, X′ is I, M is Eu, and z=0.

7. The scintillator of claim 1 , wherein A is a combination of Cs and K, B is Ca, X′ is I, M is Eu, and z=0.

8. The scintillator of claim 1 , wherein A is Cs, B is Ca, X′ is I, y=0, and z=0.

9. A scintillator comprising a chemical compound having the chemical formula
A (4-y) BM y X′ 6(1-z) X″ 6z , wherein

0≤y≤1,

A is Cs, B is Sr, X′ is I, M is In, and z=0.

10. The scintillator of claim 9 , wherein M is In + .

11. The scintillator of claim 9 , wherein y=0.

12. A scintillator comprising a chemical compound having the chemical formula A 4 B (1-y) M y X′ 6(1-z) X″ 6z , wherein
0≤y≤1,
0≤z≤1,
A is a combination of Cs and at least one selected from the group consisting of Li, Na, K, Rb and In,
B is Ca, or B is Mg, or B is a combination of two or more selected from the group consisting of Mg, Ca, Sr, and Ba,
M is one of Eu and Yb,
X′ is one of F, Cl, Br, and I, or any combination thereof, and
X″ is different from X′ and is one of F, Cl, Br, and I, or any combination thereof.

13. The scintillator of claim 12 , wherein M is one of Eu 2+ and Yb 2+ .

14. A scintillator comprising a chemical compound having the chemical formula A 4 B (1-y) M y X′ 6(1-z) X″ 6z , wherein
0≤y≤1,
0≤z≤1,
A is a combination of Cs and at least one selected from the group consisting of Li, Na, K, Rb, In and Tl,
B is Ca, or B is Mg, or B is a combination of two or more selected from the group consisting of Mg, Ca, Sr, and Ba,
M is one of Eu and Yb,
X′ is one of F, Cl, Br, and I, or any combination thereof, and
X″ is different from X′ and is one of F, Cl, Br, and I, or any combination thereof.

15. The scintillator of claim 14 , wherein M is one of Eu 2+ and Yb 2+ .

16. The scintillator of claim 14 , wherein A is a combination of Cs and Tl, and M is Eu.

17. The scintillator of claim 14 , wherein A is a combination of Cs, K and Tl, B is Ca, X′ is I, M is Eu, and z=0.

Assignees

• Univ Tennessee Res Found

Inventors

• Stand Luis
• Zhuravleva Mariya
• Yang Kan
• Melcher Charles L
• Lindsey Adam Coleman

Classifications

• C09K11/628

  with alkali or alkaline earth metals · CPC title

• C09K11/772

  with alkali or alkaline earth metals · CPC title

• C09K11/7733 Primary

  with alkali or alkaline earth metals · CPC title

• G21K4/00

  Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens (photographic processes using X-ray intensifiers G03C5/17; discharge tubes comprising luminescent screens H01J1/62; cathode ray tubes for X-ray conversion with optical output H01J31/50) · CPC title