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Ionising radiation detector

An ionizing radiation and detector technology, applied in the field of X-ray or γ-ray, can solve problems such as difficulty in resolution, and achieve the effect of light weight

Inactive Publication Date: 2011-02-09
SAINT GOBAIN CRISTAUX & DETECTEURS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be understood that the more the resolution of the detection system is improved, the more difficult it will be to further improve the resolution

Method used

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[0085] The following single crystals were used as scintillator materials:

[0086] - CsI doped with 0.8 mol% Tl Annotated as CsI

[0087] -NaI doped with Tl labeled as NaI

[0088] - with 10mol% CeCl 3 Doped LaCl 3 Labeled as LaCl

[0089] - with 5mol% CeBr 3 Doped LaBr 3 Labeled as LaBr

[0090] They can have the following shapes:

[0091] ●Cylindrical:

[0092] diameter height

[0093] 25.4mm 25.4mm is marked as 25×25

[0094] 12.8mm 12.8mm is marked as 13×13

[0095] 6mm 6mm is marked as 6×6

[0096] ●Parallelepiped:

[0097] contact surface height

[0098] 10mm×10mm 10mm is marked as 10×10×10

[0099] 9mm×9mm 20mm marked as 9×9×20

[0100] The energy of the incident rays is 662keV. Gamma radiation is not collimated. The ambient temperature is 23°C±2°C. The avalanche photodiode (labeled APD in Table 1) was Hamamatsu type S8664-1010. The photodiode pin is a Hamamatsu S3590-08 type. The preamplifier is a Hamamatsu model H4083.

[0101] The results ...

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Abstract

The invention relates to an ionising radiation detector that comprises a housing including an avalanche photodiode having its photosensitive surface in contact with the scintillating material via an optical coupler, and a preamplifier of the electric signal of the avalanche photodiode. The detector is compact, portable and very sturdy. It is capable of detecting X or gamma radiation with an excellent resolution that can be lower than 3% at 662 keV.

Description

technical field [0001] The invention relates to the field of detection of ionizing radiation, in particular X-rays or gamma-rays, by means of crystal scintillators. Background technique [0002] Ionizing radiation, which includes ionizing particles such as, inter alia, protons, neutrons, electrons, alpha particles and X-rays or gamma rays, is usually detected by means of single crystal scintillators which convert the incident radiation into light, The light is then converted into an electrical signal by means of a photomultiplier tube. In the case of X-rays or γ-rays, the scintillators used can especially be made of doped single crystals of NaI, CsI, lanthanum halides. Crystals based on lanthanum halides have been the subject of recent work such as those published in US7067815, US7067816, US2005 / 188914, US2006 / 104880 and US2007 / 241284. These crystals are promising in terms of luminescence intensity and resolution, but require special care due to their hygroscopic propertie...

Claims

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Application Information

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IPC IPC(8): G01T1/20
CPCG01T1/2018G01T1/202G01T1/20188G01T1/20185
Inventor J·弗拉曼克G·高蒂尔
Owner SAINT GOBAIN CRISTAUX & DETECTEURS
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