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Inorganic scintillating material

A scintillation material, inorganic technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low energy resolution, affecting the imaging quality and spatial resolution of instruments, long decay time, etc.

Active Publication Date: 2014-04-02
GRIREM ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The scintillation material currently used in commercial PET is mainly lutetium silicate (Lu 2 Si 2 o 5 ) and yttrium-lutetium silicate (yttrium-doped lutetium silicate) crystals, but these crystals still cannot fully meet the requirements of new PET with Time-of-Flight (TOF) technology
In particular, their longer decay time (about 47ns) and lower energy resolution (about 10%) affect the imaging quality and spatial resolution of the instrument

Method used

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  • Inorganic scintillating material

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Accurately weigh 119.89g of anhydrous LaBr in the glove box 3 (99.99%), 6.33g anhydrous CeBr 3 (99.99%) and 0.0185g anhydrous MgI 2 (99.99%), mixed evenly and put into a quartz crucible. The rest of the operations are the same as in the comparative example.

[0044] Except that the raw material ratios of Examples 2-16 are different, other operations are the same as those of Example 1.

[0045] See Table 1 for the detailed comparison of all the examples.

[0046] Table 1

[0047]

[0048] It can be seen from the examples that the performance of the scintillator of the present invention is compared with that of LaBr 3 :Ce is significantly improved, especially with higher light output, shorter decay time and higher energy resolution, which is extremely beneficial for the application of this crystal in TOF-PET. This comprehensive performance improvement cannot be achieved by doping alkaline earth metal ions or halide ions alone, but must be achieved by co-doping of...

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Abstract

The invention discloses an inorganic scintillating material. The inorganic scintillating material comprises chemical ingredients adopting the following general formula: La1-aCeaMbXcBrd, wherein M is one or two of alkaline-earth metals including Mg, Ca, Sr and Ba; X is one or two of Cl and I; a is larger than or equal to 0.01 and less than or equal to 1; b is larger than or equal to 0.0001 and less than or equal to 0.002; c is larger than 0.0001 and less than or equal to 0.6; d is larger than 2.4 and less than or equal to 3, and 3 plus 2b is equal to c plus d. The inorganic scintillating material with the chemical ingredients meeting the general formula has the characteristics of high light yield, quick attenuation, and high energy resolution ratio.

Description

technical field [0001] The present invention relates to the field of scintillation materials, in particular to an inorganic scintillation material. Background technique [0002] Scintillation materials can be used for the detection of high-energy rays such as α-rays, γ-rays, X-rays, and high-energy particles such as neutrons, and are widely used in nuclear medicine, high-energy physics, safety inspection, industrial non-destructive testing, space physics, and nuclear prospecting. [0003] Scintillation materials are usually applied in the form of single crystals, and in some cases can also be in ceramic or other forms. [0004] Different application fields have different performance requirements for scintillation materials. However, for most applications, it is desirable to have the highest possible light yield, the shortest decay time and the highest energy resolution possible in the scintillation material. Especially for nuclear medicine imaging devices such as Positron ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85
Inventor 余金秋何华强刘荣辉彭鹏刁成鹏胡运生吴浩
Owner GRIREM ADVANCED MATERIALS CO LTD