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Scintillation crystal assembly, encapsulation method and detector without water encapsulation

A technology of scintillation crystals and composites, which is applied in scintillation elements, radiation measurement, instruments, etc., can solve the problems of reduced image resolution, reduced scintillator characteristics, etc., and achieves a simple process, reduced optical characteristics, and low production costs. Effect

Active Publication Date: 2019-05-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since lanthanum bromide is a hygroscopic material, it will deliquesce due to the absorption of moisture when exposed to the air, which will reduce the characteristics of its scintillator, which will greatly reduce the image resolution.

Method used

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  • Scintillation crystal assembly, encapsulation method and detector without water encapsulation
  • Scintillation crystal assembly, encapsulation method and detector without water encapsulation
  • Scintillation crystal assembly, encapsulation method and detector without water encapsulation

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Example 1 Scintillation crystal assembly without water encapsulation

[0060] see figure 1 , the water-free packaged scintillation crystal assembly of the present application is composed of a window 11 , a scintillation crystal 12 and a casing 14 . The scintillation crystal 12 is a lanthanum bromide crystal, and is installed in a casing 14 . The window 11 is welded to the casing 14 and the crystal is packaged in the casing to obtain a water-free packaged scintillation crystal assembly.

Embodiment 2

[0061] Example 2 Scintillation crystal assembly without water encapsulation

[0062] see figure 1 , the water-free packaged scintillation crystal assembly of the present application is composed of a window 11 , a scintillation crystal 12 and a casing 14 . The scintillation crystal 12 is a cerium bromide crystal, and is installed in a casing 14 .

[0063] The portion of the window 11 in contact with the housing 14 is mechanically polished to a smoothness of 0.1 μm. The portion of the window 11 in contact with the housing 14 contains a 10 nm thick gold plating layer sputtered by direct current. Before the window 11 and the shell 14 are packaged, a 1 μm thick solder layer is plated between the gold-plated layer of the window 11 and the shell 14, the window 11 is welded to the shell 14 and the crystal is packaged in the shell to obtain an anhydrous package. Scintillation crystal assembly.

Embodiment 3

[0064] Example 3 Scintillation crystal assembly without water encapsulation

[0065] see figure 2 , The water-free packaged scintillation crystal assembly of the present application is composed of a window plate 11 , a scintillation crystal 12 , a crystal lining 13 , an outer shell 14 and an end cap 15 .

[0066] Specifically, as figure 2 As shown in 2, there are grooves on both ends of the shell 14, and the size of the grooves is consistent with the size of the end cap 15 and the window 11, so that the end cap 15 and the window 11 can be embedded in the two ends of the shell 14 and close the shell 14.

[0067] The shell 14 and the end cap 15 are made of stainless steel, the window 11 is K9 glass, the scintillation crystal 12 is a cerium-doped lanthanum bromide crystal, and the crystal lining 13 is polytetrafluoroethylene. The contact part of the shell 14 and the end cover 15 is plated with a tin solder layer by thermal evaporation, the thickness of the tin solder layer is...

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Abstract

The invention discloses a waterless packaged scintillation crystal combination body. The combination body comprises a scintillation crystal, a shell and a window sheet. The window sheet and the shell are packaged and connected, and the scintillation crystal is sealed in an internal portion of the shell. The invention also discloses a waterless packaging method of the waterless packaged scintillation crystal combination body. The method comprises the following steps that the shell used for packaging a lanthanum bromide scintillator, an end cap, the window sheet, a lanthanum bromide crystal and a crystal lining are included; a thermal evaporation technology is used to process the shell and the end cap; a teflon material is used to make the crystal lining, a shape of the crystal lining is a cylinder whose one end is closed, and an internal portion can accommodate the lanthanum bromide scintillator; and a waterless vacuum cold pressing technology is used to seal the end cap and the window sheet. By using a packaging technology, the lanthanum bromide crystal is isolated from water vapor so that a problem that the lanthanum bromide crystal absorbs the water vapor and is easy to deliquesce is solved.

Description

technical field [0001] The present application relates to a packaging method for deliquescent optical crystals, which belongs to the field of crystals. Background technique [0002] Scintillation crystal detector is a scintillation detector that uses the flash of ionizing radiation to detect in certain substances. It has the characteristics of high detection efficiency and short resolution, and is widely used in nuclear medicine, safety inspection, high-energy physics and cosmic ray detection. researching. Scintillation crystal detectors usually use scintillation crystals that can effectively block and absorb electromagnetic radiation and produce luminescence with electromagnetic radiation as detection materials. The scintillation crystal detector module is composed of some single crystal arrays of the same size, and a reflective film is sandwiched between each crystal to achieve the light splitting effect, which is used to identify the position of each crystal. [0003] W...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/00B21D39/00
CPCB21D39/00G01T1/003
Inventor 吴少凡洪茂椿叶宁苏伟平郑发鲲郑熠
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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