Composite crystal coating method and composite crystal detector
A composite crystal and detector technology, which is applied in the field of high-energy X/γ-ray detection, can solve problems such as unfavorable shock absorption design and crystal cracking, and achieve good energy resolution, good consistency, and superior performance.
Active Publication Date: 2020-04-14
INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
This method needs to chamfer the CsI(Na) crystal as the light guide through mechanical processing, and there is a risk of crystal cracking during the processing; in addition, there is only a loose attachment relationship between the reflective film and the crystal, and the reflective film itself cannot Adhesive and other treatments are done so that there is no connection between the side of the crystal and the sealing box (the metal shell used to place the composite crystal and prevent the deliquescence of the crystal), which is not conducive to the shock absorption design
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[0032] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.
[0033] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0034] figure 1 The coating method of the composite crystal provided by the present invention. figure 2 Schematic diagram of the structure of the composite crystal provided by the present invention. Such as figure 1 with figure 2 As shown, the invention provides a method for coating a compos...
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Abstract
The invention discloses a composite crystal coating method and a composite crystal detector. The coating method comprises the steps: grinding and polishing the surface of a NaI (Tl) crystal and a CsI(Na) crystal to ensure that the NaI (Tl) crystal and the CsI (Na) crystal are clean and transparent; enabling the NaI (Tl) crystal, the CsI (Na) crystal and quartz glass to be aligned from top to bottom, to be stacked sequentially, and then to be bonded together by transparent organic silicone gel; pasting a first reflective films on the side surface and bottom surface of the CsI (Na) crystal through the transparent organic silicone gel after the solidifying of gel; grinding the edge of the top surface of the NaI (Tl) crystal to form an annular diffuse reflection region; covering the top surface of the NaI (Tl) crystal with a second reflective film, covering the surface of the second reflective film with a third reflective film, and bending the third reflective film along the edge of the top surface of the NaI (Tl) crystal to a side of the NaI (Tl) crystal and coating the first reflective film attached to a side of the CsI (Na) crystal. The coating method provided by the invention is simple in process, needs no chamfering treatment, and avoids the risk of crystal cracking. The formed composite crystal detector has good energy resolution.
Description
technical field [0001] The disclosure relates to the field of high-energy X / γ-ray detection, and in particular to a composite crystal, a coating method for it, and a composite crystal detector. Background technique [0002] In the field of radiation detection, sodium iodide (thallium activated) single crystal (ie NaI(Tl) crystal) and cesium iodide (thallium activated) single crystal (ie CsI(Na) crystal) are the two most widely used inorganic scintillation crystals. As shown in Table 1, they have a high fluorescence output capability; the maximum emission wavelength is close to the photomultiplier tube (PMT) response peak wavelength (about 400nm) of the current best quantum conversion efficiency double alkaline photocathode material, The two can be well matched to achieve the highest light output efficiency, which helps to obtain high energy resolution; can be formed in single crystal or polycrystalline form, and can be fabricated into a variety of geometries, easy to use; ha...
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IPC IPC(8): G01T1/202
CPCG01T1/2023
Inventor 张翼飞刘聪展路雪峰李旭芳李正伟张硕常治高鹤高冠华
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI