Bismuth-charged structured solid organic scintillator

Patent metadata

Field	Value
Publication number	US-2017343681-A1
Application number	US-201515538599-A
Country	US
Kind code	A1
Filing date	Dec 18, 2015
Priority date	Dec 22, 2014
Publication date	Nov 30, 2017
Grant date	—

Abstract

A scintillator for imaging using X-rays or gamma rays or charged particles, includes a network of glass capillaries with an inner diameter no greater than 500 micrometres. The capillaries are filled with a polymer material made up of at least (i) a monomer selected from the group comprising vinyltoluene, styrene and vinylxylene and the isomers thereof, (ii) a cross-linking agent made up of a divinylbenzene or a dimethacrylate having a central chain which includes 1 to 12 carbon atoms, and (iii) triphenylbismuth. The cross-linking agent is provided to make up 10 wt % to 60% wt of the mixture thereof with the monomer, and the triphenylbismuth makes up at least 5 wt %. The cross-linking agent is provided in a ratio of 0.75 to 2.25 times the weight content of the triphenylbismuth.

First claim

1 . A scintillator for imaging using X-rays or gamma-rays or charged particles, comprising:
a network of glass capillaries having an inner diameter at most equal to 500 micrometers, the capillaries filled with a polymer material comprising at least, (i) a monomer selected from the group constituted by vinyltoluene, styrene and vinylxylene and their isomers, (ii) a cross-linking agent constituted by a dimethacrylate having a central chain comprising from 1 to 12 carbon atoms or by divinylbenzene, and (iii) triphenylbismuth, wherein the polymer material includes 10 wt. % to 60 wt. % cross-linking agent in combination with the monomer, and at least 5 wt. % triphenylbismuth, and a proportion of the cross-linking agent is 0.75 to 1.25 times the weight of triphenylbismuth.

2 . The scintillator according to claim 1 , wherein the cross-linking agent is divinylbenzene.

3 . The scintillator according to claim 1 , wherein the cross-linking agent is 1,4 butanediyl dimethacrylate.

4 . The scintillator according to claim 1 , wherein the polymer material comprises the monomer and the cross-linking agent in a weight ratio of between 2 and 4.

5 . The scintillator according to claim 4 , wherein the monomer and the cross-linking agent are in a weight ratio of between 2.9 and 3.1.

6 . The scintillator according to claim 1 , wherein the cross-linking agent and the triphenylbismuth are in a weight ratio of between 0.9 and 1.1.

7 . The scintillator according to claim 1 , wherein the polymer material further comprises at least 8 wt. % Bi.

8 . The scintillator according to claim 1 , wherein the polymer material further comprises at least one fluorophore capable of generating light in the visible spectrum.

9 . The scintillator according to claim 1 , wherein a face of the scintillator opposite an X-ray or gamma-ray or charged-particle ray includes a reflective coating suitable for reflecting light towards the other face.

10 . The scintillator according to claim 1 , wherein a face of the scintillator opposite an X-ray or gamma-ray or charged-particle ray includes a scattering coating suitable for sending light towards the other face.

11 . The scintillator according to claim 9 , wherein the capillaries include an internal coating of a reflective material.

12 . The scintillator according to claim 1 , wherein the capillaries have an inner diameter no more than 20 micrometers.

13 . The scintillator according to claim 10 , wherein the capillaries include an internal coating of a reflective material.

Assignees

• Commissariat Energie Atomique

Inventors

• Darbon Stéphane
• Hamel Matthieu
• Rousseau Adrien
• Caillaud Tony

Classifications

• G01T1/201 Primary

  using scintillating fibres · CPC title

• G01T1/2002

  Optical details, e.g. reflecting or diffusing layers · CPC title