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Cerium halide flashing crystal and its preparation method

A technology of scintillation crystals and single crystals, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of short decay time, poor time resolution, high light output, etc., and achieve easy batch growth, low growth cost, and fast decay time Effect

Active Publication Date: 2007-01-31
北京玻璃研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] An object of the present invention is to solve the problems of low light output, low energy resolution, and poor time resolution of the scintillator in the prior art, and to provide a scintillator with high light output, short decay time, and energy and time resolution. Good, almost background-free scintillators

Method used

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  • Cerium halide flashing crystal and its preparation method
  • Cerium halide flashing crystal and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Cerium chloride (CeCl 3 ) growth of single crystals by the crucible drop method.

[0047] Raw material: 99.99% anhydrous cerium chloride (CeCl 3 ) 40.0 grams;

[0048] crucible:

[0049] It is fired from a transparent quartz tube with a diameter of 30 mm and a length of 20 cm. The crucible 7 is axisymmetric, with a conical bottom and a taper of 60 degrees;

[0050] Crystal growth furnace:

[0051] A crucible descending furnace made of high-temperature refractory materials, including a furnace shell 1; a furnace body composed of insulation materials 12, refractory bricks 7, furnace tubes 4, and furnace wires 5. There is a hole in the center of the lower bottom surface of the furnace body, and the upper part of the furnace body Covered with a furnace mouth plug 3; the hearth of the furnace body is divided into a high temperature zone A, a crystallization zone B and a low temperature zone C by the bayonet 9; the control thermocouple 2 penetrates laterally and is embedd...

Embodiment 2-8

[0056] Embodiment 2-8, comparative example 1-2

[0057] In embodiment and comparative example, the purity of raw material used is respectively: CeCl 3 99.99%, CeBr 3 99.99%, CeI 3 99.9%, LaCl 3 99.99%. The quartz crucibles are all made of transparent quartz tubes with a diameter of 30 mm and a length of 20 cm. The crucibles are axisymmetric and have a conical bottom. The method of operation is the same as in Example 1, and the raw materials used in each example, as well as the main process parameters of the angle of the bottom of the cone and the descending growth, are listed in Table 2.

[0058]

Embodiment 9-23

[0060] The operation method is the same as in Example 1. The chemical composition of the crystals grown in each example, the mole percentage of the corresponding raw materials, the taper of the crucible bottom and the main process parameters of the descending growth are listed in Table 3.

[0061] Table three

[0062]

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Abstract

The present invention belongs to the field of scintillation material, in particular, it relates to a cerium halide scintillation crystal and its preparation method. Said crystal composition is CeX3, in which X is mixture of elements of halogen family, especially it is mixture of bromine, chlorine and iodine. It is made up by utilizing sealed quartz crucible atmosphere lowering method growth technique.

Description

technical field [0001] The invention relates to the field of scintillation materials, and relates to a cerium halide scintillation crystal and a manufacturing method thereof. Background technique [0002] Scintillators are important materials for manufacturing various nuclear detectors, and have been widely used in various scientific research and technical fields, such as high-energy physics, nuclear physics, space physics, nuclear medicine, geological exploration, safety inspection, and national defense industry. The so-called scintillator refers to an object that can emit light under the irradiation of high-energy particles or rays (such as X-rays, gamma rays, etc.), including scintillation gas, scintillation liquid, scintillation ceramics, scintillation glass, scintillation plastic, and scintillation crystals, etc., wherein , scintillation crystals are a large class of scintillators in the form of macroscopic crystals, which have high transparency in their light-emitting ...

Claims

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Application Information

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IPC IPC(8): C09K11/85
Inventor 张明荣葛云程张春生范宇红郭建军陆红丁小东
Owner 北京玻璃研究院有限公司
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