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Easy-to-air-slake scintillator photonic crystal and preparation method thereof

A photonic crystal and scintillator technology, which is applied in the field of nuclear radiation detection and devices, can solve the problems of preparing photonic crystals and destroying scintillators, and achieves the effects of stable structural properties, avoiding direct contact and compact structure

Inactive Publication Date: 2020-08-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only be applied to non-deliquescent scintillators because the critical step is to immerse the scintillator in water to self-assemble the microspheres on its surface.
[0006] Since the halide inorganic scintillators are all deliquescent scintillators, if the deliquescent scintillators are immersed in water, the scintillators will be destroyed, so this method cannot be used to prepare photonic crystals on the surface of deliquescent scintillators.

Method used

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  • Easy-to-air-slake scintillator photonic crystal and preparation method thereof
  • Easy-to-air-slake scintillator photonic crystal and preparation method thereof
  • Easy-to-air-slake scintillator photonic crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The scintillator used in this embodiment is CsI(Na), the diameter of the crystal is 30 mm, and the thickness is 2 mm.

[0035] In a dry clean room, the preparation steps are as follows:

[0036] 1) Soak the silicon wafer in a 10% sodium lauryl sulfate solution for 24 hours to form a hydrophilic monolayer on the surface of the silicon wafer.

[0037] 2) Select PS microsphere colloidal particle solution with a diameter of 300nm purchased from Wuhan Huake Weike Technology Co., Ltd. and add deionized water to prepare a suspension with a mass fraction of PS microsphere colloidal particle solution of 2.5%. Take out the silicon wafer; drop three drops (about 0.15 ml) on the surface of the silicon wafer with a pipette gun, with an interval of 1-2 seconds between each drop, at this time the PS microspheres will self-assemble on the silicon wafer to form a hexagonal density. Packed periodic array structure of microspheres. The suspension of 2.5% suspension is only for the conve...

Embodiment 2

[0047]The scintillator used in this embodiment is CsI(Na), the diameter of the crystal is 30 mm, and the thickness is 2 mm.

[0048] In a dry clean room, the preparation steps are as follows:

[0049] 1) Soak the silicon chip in a 15% sodium lauryl sulfate solution for 48 hours to form a hydrophilic monolayer on the surface of the silicon chip;

[0050] 2) Select PS microsphere colloidal particle solution with a diameter of 400nm purchased from Wuhan Huake Weike Technology Co., Ltd., add water to prepare a suspension of PS microsphere colloidal particle solution with a mass fraction of 2.5%, and pipette three drops ( About 0.15 ml), each drop is dropped on the surface of the treated silicon wafer at an interval of 1-2s, at this time, the PS microspheres will self-assemble on the silicon wafer;

[0051] 3) After the solution on the silicon wafer is dry, put the silicon wafer into the deionized water slowly; the speed of putting the silicon wafer into the deionized water is con...

Embodiment 3 to 9

[0060] Using the above steps, Examples 3 to 9 were carried out, wherein the selection of main preparation parameters and the scintillation enhancement ratio obtained from the test are shown in Table 1. The results show that for the deliquescent scintillators involved, the photonic crystal results can be obtained by using this method, and it can play the role of enhancing scintillation and luminescence.

[0061]

[0062] Table 1 Embodiment 3 to 9 parameter details

[0063] The preparation method disclosed in the present invention is not limited to deliquescent halide inorganic scintillators; it is also applicable to other deliquescent scintillators.

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Abstract

The invention discloses an easy-to-air-slake scintillator photonic crystal and a preparation method thereof. Through transferring of a heat release adhesive tape, direct contact of an easy-to-air-slake scintillator and water in the preparation process is avoided; the photonic crystal prepared through the method is stable in structure property and compact in structure, light output of the scintillator can be remarkably enhanced, and the enhancement effect of the photonic crystal is achieved; and the method is economical and applicable, and batched production can be achieved.

Description

technical field [0001] The invention belongs to the field of nuclear radiation detection and devices, in particular to a method for preparing a deliquescent scintillator photonic crystal. Background technique [0002] Halide inorganic scintillators (e.g. CsI(Na), CsI(Tl), NaI(Tl), SrI2(Eu), LaCl 3 (Ce), LaBr3(Ce)) generally have excellent scintillation properties. For example, as an alkali metal halide inorganic scintillator, CsI(Na) crystal has high density, atomic number, and high light yield, so it exhibits good stopping power and extremely unique radiation response to heavy charged particles and gamma rays. probing properties. As an ideal scintillation material, it is widely used in radiation imaging, high-energy physics, neutrino-nucleus scattering detection, nuclear medicine, dark matter detection, space detection and other fields. [0003] The halide inorganic scintillator has a high refractive index (usually between 1.7-1.9). Under the excitation of high-energy pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/40C23C16/455B05D1/18B05D7/24C30B33/00C30B29/12
CPCB05D1/18B05D7/24C23C16/402C23C16/403C23C16/405C23C16/45525C30B29/12C30B33/00
Inventor 欧阳潇向新程
Owner TSINGHUA UNIV
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