Lanthanide doped cesium barium halide scintillators

Patent metadata

Field	Value
Publication number	US-11360222-B2
Application number	US-202017024590-A
Country	US
Kind code	B2
Filing date	Sep 17, 2020
Priority date	May 7, 2009
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

The present invention provides for a composition comprising an inorganic scintillator comprising an optionally lanthanide-doped cesium barium halide, useful for detecting nuclear material.

First claim

What is claimed is:

1. An inorganic scintillator having the formula:
Sr y Ba z CsX 5 :Ln 1 x (IIa); wherein X is Br, CI, I, or a mixture thereof; Ln 1 is a lanthanide with a valence of 2+; x has a value having the range 0<x<2; y has a value having the range 0<y<2; z has a value having the range 0≤z<2; y+z>0; and, x+y+z=2.

2. The inorganic scintillator of claim 1 , wherein X is Br.

3. The inorganic scintillator of claim 1 , wherein X is Cl.

4. The inorganic scintillator of claim 1 , wherein X is I.

5. The inorganic scintillator of claim 1 , wherein Ln′ is Eu or Yb.

6. The inorganic scintillator of claim 1 , wherein y has a value of 0, and z has a value having the range 0<z<2.

7. The inorganic scintillator of claim 1 , wherein x has a value having the range 0<z<0.2.

8. The inorganic scintillator of claim 7 , wherein x has a value having the range 0.02x<0.2.

9. The inorganic scintillator of claim 1 , wherein the inorganic scintillator is a single crystal having at least one dimension of a length of at least 1 mm, or a length at least sufficient to stop or absorb gamma-radiation.

10. A gamma ray detector comprising the inorganic scintillator of claim 9 .

11. An inorganic scintillator having the formula: M m CsX 5 :Ln 1 x (IIe); wherein M is Sr; X is Br, CI, I, or a mixture thereof; Ln 1 is a lanthanide with a valence of 2+; x has a value having the range 0<x<2; m has a value having the range 0<m<2; and, x+m=2.

12. The inorganic scintillator of claim 11 , wherein X is Br.

13. The inorganic scintillator of claim 11 , wherein X is Cl.

14. The inorganic scintillator of claim 11 , wherein X is I.

15. The inorganic scintillator of claim 11 , wherein Ln 1 is Eu or Yb.

16. The inorganic scintillator of claim 11 , wherein x has a value having the range 0<x<0.2.

17. The inorganic scintillator of claim 16 , wherein x has a value having the range 0.02x<0.2.

18. The inorganic scintillator of claim 11 , wherein the inorganic scintillator is a single crystal having at least one dimension of a length of at least 1 mm, or a length at least sufficient to stop or absorb gamma-radiation.

19. A gamma ray detector comprising the inorganic scintillator of claim 18 .

20. An inorganic scintillator having the formula: M m CsX 5 :Ln 1 x (IIe); wherein M is Ba; X is CI or I, or a mixture of Br, CI, and/or I; Ln 1 is a lanthanide with a valence of 2+; x has a value having the range 0<x<2; m has a value having the range 0<m<2; and, x+m=2.

21. The inorganic scintillator of claim 20 , wherein X is Cl.

22. The inorganic scintillator of claim 20 , wherein X is I.

23. The inorganic scintillator of claim 20 , wherein Ln 1 is Eu or Yb.

24. The inorganic scintillator of claim 20 , wherein x has a value having the range 0<x<0.2.

25. The inorganic scintillator of claim 24 , wherein x has a value having the range 0.02x<0.2.

26. The inorganic scintillator of claim 20 , wherein the inorganic scintillator is a single crystal having at least one dimension of a length of at least 1 mm, or a length at least sufficient to stop or absorb gamma-radiation.

27. A gamma ray detector comprising the inorganic scintillator of claim 26 .

28. An inorganic scintillator having the formula: M m CsX 5 :Ln 1 x (IIe); wherein M is Ba; X is Br; Ln 1 is a lanthanide with a valence of 2+; x has a value having the range 0.02x<0.2; m has a value having the range 0<m<2; and, x+m=2.

29. The inorganic scintillator of claim 28 , wherein Ln 1 is Eu or Yb.

30. The inorganic scintillator of claim 28 , wherein the inorganic scintillator is a single crystal having at least one dimension of a length of at least 1 mm, or a length at least sufficient to stop or absorb gamma-radiation.

31. A gamma ray detector comprising the inorganic scintillator of claim 30 .

Assignees

• Univ California

Inventors

• Borade Ramesh B
• Bizarri Gregory A
• Bourret-Courchesne Edith D
• Derenzo Stephen E
• Hanrahan Stephen M
• Yan Zewu
• Chaudry Anurag
• Canning Andrew

Classifications

• C09K11/7733 Primary

  with alkali or alkaline earth metals · CPC title

• G21K2004/06

  with a phosphor layer · 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

• C09K11/7705

  with alkali or alkaline earth metals · CPC title

• G01T1/2023 Primary

  Selection of materials · CPC title