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Organic plastic scintillator and preparing method thereof and light conversion device

An organic plastic and scintillator technology, which is applied in the direction of conversion screens, instruments, optics, etc., can solve the problems of inability to achieve n-γ resolution, the performance of plastic scintillators is reduced, and the human body is injured. Yield, simple formula effect

Active Publication Date: 2018-08-31
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition to the fact that the existing plastic scintillators cannot achieve n-γ resolution due to structural composition, there is another problem, that is, the use of extremely volatile benzene as a quencher leads to poor stability.
For example, BC-442, the most commonly used plastic scintillator, contains a benzene quencher. Regardless of whether it is used or not, benzene will continue to volatilize, resulting in a continuous decrease in the performance of BC-442 plastic scintillator.
Moreover, benzene is also a highly toxic organic substance, which is harmful to the human body.

Method used

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  • Organic plastic scintillator and preparing method thereof and light conversion device
  • Organic plastic scintillator and preparing method thereof and light conversion device
  • Organic plastic scintillator and preparing method thereof and light conversion device

Examples

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preparation example Construction

[0024] The invention provides a method for preparing an organic plastic scintillator, which comprises: degassing the clear night of a vinyl toluene solution dispersed with 2,5-diphenyloxazole in a sealed container, and heating it to 125-150 for the first time After reacting at ℃ for 4-8 hours, slowly cool to room temperature to obtain a precursor; heat the precursor to 120-140 ℃ for the second time to solidify and then cool to room temperature.

[0025] Using 2,5-diphenyloxazole and vinyltoluene solution as raw materials, the formula is simple, the purity of the scintillator is guaranteed, and the operation is more convenient.

[0026] A specific preparation method for clearing the vinyl toluene solution dispersed with 2,5-diphenyloxazole is: adding 2,5-diphenyloxazole to vinyl toluene in proportion, and ultrasonically dispersing to 2 ,5-Diphenyloxazole was completely dissolved in vinyltoluene. The ultrasonication time is about 15 minutes. After dissolving, it is observed tha...

Embodiment 1

[0045] A preparation method of an organic plastic scintillator, comprising:

[0046] Weigh 0.5g of 2,5-diphenyloxazole, add it into a weighing bottle containing 10g of vinyl toluene, and ultrasonically disperse it for about 15min, and filter the ultrasonically dispersed PPO / PVT solution with a special filter head for the organic phase, The filtrate was injected into a glass bottle with a rubber stopper, and the rubber stopper was covered. Insert a needle for injection on the rubber stopper, pump air with a vacuum pump for 15 minutes, turn off the vacuum pump, fill the bottle with nitrogen for 1 minute with the needle, and stop the inflation. Repeat the pumping and inflation operation once. Put the treated reaction bottle in an oil bath and heat it to 125°C for 4 hours. After the reaction, set the oil bath to 95°C, 65°C, and 35°C respectively. Turn off the heating, take out the reactant, and obtain the precursor. The precursor reactants were put into a muffle furnace and hea...

Embodiment 2

[0048] A method for preparing an organic plastic scintillator, which differs from Example 1 in that the mass of 2,5-diphenyloxazole is 1.0 g.

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Abstract

The invention discloses an organic plastic scintillator and a preparing method thereof and a light conversion device, and belongs to the technical field of organic plastic scintillators. The preparingmethod includes the steps that liquor of a vinyltoluene solution with dispersed 2,5-diphenyloxazole is degassed in a sealed container, the obtained product is heated to 125 DEG C to 150 DEG C for thefirst time and reacted for 4 h to 8 h, and then is slowly cooled to the normal temperature, and a precursor is obtained; the precursor is heated to 120 DEG C to 140 DEG C for the second time and solidified to be cooled to the normal temperature. An implementation method of the organic plastic scintillator is simple and convenient, the formula is simple, raw materials are environmentally friendly, the organic plastic scintillator prepared with the method is free of bubbles, free of embrittlement, good in stability, free of toxic and side effects and high in light transmittance, resolution ratio and response speed. The organic plastic scintillator is prepared with the method. The light conversion device comprises the organic plastic scintillator and can be used for detecting and diagnosinghigh-energy particles and radial rays.

Description

technical field [0001] The invention relates to the technical field of organic plastic scintillators, in particular to an organic plastic scintillator, a preparation method thereof, and a light conversion device. Background technique [0002] Scintillators are commonly used light conversion device components for diagnosing the radiation or particles produced by nuclear reactions, and play an important role in the research of high-energy particles. According to different application requirements, there are different requirements for scintillator performance. In terms of neutron diagnosis, there is currently no solid scintillator available in China that can achieve n-γ spectrum resolution. [0003] In addition to the inability to achieve n-γ resolution due to the structure and composition of the existing plastic scintillators, there is another problem, that is, the extremely volatile benzene is usually used as a quencher, which leads to poor stability. For example, BC-442, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/06C08F2/44C08K5/353G21K4/00
CPCC08F2/44C08F112/06C08K5/353G21K4/00
Inventor 陈姝帆董宏基吴卫东钟铭龙黄传群方瑜罗炫米睿杨瑞戆张庆军
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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