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Preparation method of plastic scintillator optical fiber array

A technology of plastic scintillator and optical fiber array, which is applied in the direction of optical components, other household appliances, household appliances, etc., can solve the problems of light collection coefficient reduction, decline, and scintillator detector’s response ability to low-energy neutrons, etc., to achieve convenient The effect of control

Active Publication Date: 2018-08-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the level of the light collection coefficient is related to the detection sensitivity of the entire detector, and the light collection coefficient is related to the optical properties, shape, surface properties and other factors of the scintillator itself, while the conventional bulk plastic scintillator has a non-negligible loss of photons. It is because a large number of photons that do not meet the total reflection conditions will be lost due to refraction, which will lead to a decrease in the light collection coefficient and affect the detection sensitivity.
In addition, when a plastic scintillator detector is used to detect pulse fission neutrons, due to the n-p elastic scattering cross-section is related to the neutron energy, the light yield of the plastic scintillator varies nonlinearly with the proton energy, etc., the neutron response capability of the detector Declines rapidly with decreasing neutron energy, resulting in reduced scintillator detector responsiveness to lower energy neutrons

Method used

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  • Preparation method of plastic scintillator optical fiber array
  • Preparation method of plastic scintillator optical fiber array
  • Preparation method of plastic scintillator optical fiber array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare a plastic scintillator optical fiber with a mass fraction of 2,5-diphenyloxazole of 1 wt%, and a mass fraction of 1,4-bis[2-(5-phenyl)oxazolyl] of 0.02 wt%, and its array:

[0032] Step 1, measure 10g styrene, 0.1g 2,5-diphenyloxazole (PPO) and 0.002g 1,4-bis[2-(5-phenyl)oxazolyl]benzene (POPOP), in Fully mix in a nitrogen protective atmosphere, and stir for 90 minutes; obtain a sealed mixed solution;

[0033] Step 2. Place the sealed mixed solution in a 70°C incubator, and conduct the polymerization reaction for 48 hours in the first stage;

[0034] Step 3. Place the product of the first-stage polymerization reaction in a programmable temperature-controlled heating furnace, raise the temperature to 110°C, and the temperature rise rate is 5°C / h, and the second-stage polymerization reaction lasts for 120 hours;

[0035] Step 4. Place the product that completed the second-stage polymerization reaction in a 45°C incubator, and conduct the third-stage polymerizatio...

Embodiment 2

[0040]Prepare a plastic scintillator optical fiber with a mass fraction of 2,5-diphenyloxazole of 0.5wt% and a mass fraction of 1,4-bis[2-(5-phenyl)oxazolyl] of 0.02wt% and its array:

[0041] Step 1. Measure 10g of styrene, 0.05g of 2,5-diphenyloxazole and 0.002g of 1,4-bis[2-(5-phenyl)oxazolyl]benzene, fully mix them in a nitrogen protective atmosphere, and stir 90min, obtain the sealed mixed solution;

[0042] Step 2. Place the sealed mixed solution in a 70°C incubator, and conduct the polymerization reaction for 48 hours in the first stage;

[0043] Step 3. Place the product of the first-stage polymerization reaction in a programmable temperature-controlled heating furnace, raise the temperature to 110°C, and the temperature rise rate is 5°C / h, and the second-stage polymerization reaction lasts for 120 hours;

[0044] Step 4. Place the product that completed the second-stage polymerization reaction in a 45°C incubator, and conduct the third-stage polymerization reaction f...

Embodiment 3

[0049] Prepare a plastic scintillator optical fiber with a mass fraction of 2,5-diphenyloxazole of 2.5wt% and a mass fraction of 1,4-bis[2-(5-phenyl)oxazolyl] of 0.02wt% and its array:

[0050] Step 1. Measure 10g of styrene, 0.25g of 2,5-diphenyloxazole and 0.002g of 1,4-bis[2-(5-phenyl)oxazolyl]benzene, fully mix them in a nitrogen atmosphere, and stir 90min, obtain the sealed mixed solution;

[0051] Step 2. Place the sealed mixed solution in a 70°C incubator, and conduct the polymerization reaction for 48 hours in the first stage;

[0052] Step 3. Place the product of the first-stage polymerization reaction in a programmable temperature-controlled heating furnace, raise the temperature to 110°C, and the temperature rise rate is 5°C / h, and the second-stage polymerization reaction lasts for 120 hours;

[0053] Step 4. Place the product that completed the second-stage polymerization reaction in a 45°C incubator, and conduct the third-stage polymerization reaction for 72 hour...

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Abstract

The invention discloses a preparation method of a plastic scintillator optical fiber array. The method includes the steps that styrene is utilized as a polymer matrix monomer, 2,5-diphenyloxazole and1,4-bis[2-(5-phenyl) oxazolyl] benzene are utilized as a scintillation matrix, and a melt spinning technology is adopted to prepare the plastic scintillator optical fiber array with good light-emitting performance. According to the preparation method, by adjusting the mass fraction of 2,5-diphenyloxazole and 1,4-bis[2-(5-phenyl) oxazolyl] benzene and controlling the melt spinning process parameters, the plastic scintillator optical fiber array with good light-emitting performance is obtained. The plastic scintillator optical fiber array with good light-emitting performance prepared through thepreparation method can be applied in the field of physical process diagnosis of inertial confinement fusion (ICF), neutron / neutrino detection, nuclear medical imaging, environmental detection and thelike.

Description

technical field [0001] The invention belongs to the field of plastic scintillator preparation, and in particular relates to the preparation of a plastic scintillator optical fiber array. Background technique [0002] Scintillators refer to a class of materials that can absorb radiation energy under the action of nuclear radiation (α, β, γ rays, etc.) or high-energy particles, convert part of the absorbed radiation energy into light energy, and emit short-term fluorescence. Scintillator detectors use the characteristics of scintillator materials to emit light under the excitation of charged ions to achieve effective detection of particles. Due to the high detection efficiency, fast time response, and high sensitivity to radiation particles, scintillator detectors The time resolution and linear range are widely used in various fields such as high-energy physics, nuclear physics, nuclear medicine, and environmental monitoring and protection. [0003] Organic plastic scintillat...

Claims

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Application Information

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IPC IPC(8): B29D11/00
CPCB29D11/00663
Inventor 任洪波徐业伟朱家艺毕于铁
Owner SOUTHWEAT UNIV OF SCI & TECH
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