Cerium manganese co-doped yttrium (lutetium) aluminate ultra fast scintillation crystal and preparation method thereof

A scintillation crystal, yttrium aluminate technology, applied in crystal growth, chemical instruments and methods, single crystal growth and other directions, can solve the problems of long scintillation time, high light yield, slow component ratio and so on

Inactive Publication Date: 2009-09-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

The following table 1 summarizes the basic scintillation properties of cerium ion-doped oxide scintillation crystals. From Table 1, it can be seen that Ce:YAP and Ce:LuAP crystals have short decay time, high light yield, and luminous peaks that are similar to the receiving range of photomultiplier tubes. Matching and other advantages, but there is still a certain distance from the ultra-f

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  • Cerium manganese co-doped yttrium (lutetium) aluminate ultra fast scintillation crystal and preparation method thereof
  • Cerium manganese co-doped yttrium (lutetium) aluminate ultra fast scintillation crystal and preparation method thereof

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Embodiment 1

[0028] Embodiment 1: prepare Ce 0.001 mn 0.005 Y 0.999 Al 0.995 o 3 scintillation crystal

[0029] According to the above-mentioned process step (1) take Ce 2 o 3 , MnO 2 , Y 2 o 3 , and Al 2 o 3 , where MnO 2 The purity is 99.995%, and the rest are 99.999%; according to the above-mentioned process step (2), the above-mentioned components weighed are fully mixed into a uniform powder; according to the above-mentioned process step (3), the uniformly mixed raw materials are Under pressure, press the mixed powder into a cylindrical cake (the diameter of the cake is slightly smaller than the diameter of the crucible container), and sinter at a temperature of 1200 ° C for 10 hours; according to the above process step (4), pack the fired Enter in the Ir gold crucible in the hearth, adopt medium-frequency induction to heat the raw material in the Ir crucible to make it melt completely; Adopt the YAlO of b axis according to process step (5) 3 (YAP) crystal seeds were grow...

Embodiment 2

[0030] Embodiment 2: preparation Ce 0.01 mn 0.01 Y 0.99 Al 0.99 o 3 scintillation crystal

[0031] According to the above-mentioned process step (1), take Ce at a ratio of 0.02:0.02:0.99:0.99 with a molar ratio 2 o 3 , MnO 2 , Y 2 o 3 and Al 2 o 3 , where MnO 2 The purity is 99.995%, and the rest are 99.999%; according to the above-mentioned process step (2), the above-mentioned components weighed are fully mixed into a uniform powder; according to the above-mentioned process step (3), the uniformly mixed raw materials are Under pressure, press the mixed powder into a cylindrical cake (the diameter of the cake is slightly smaller than the diameter of the crucible container), and sinter at a temperature of 1200 ° C for 10 hours; according to the above process step (4), pack the fired Enter in the Ir gold crucible in the hearth, adopt medium-frequency induction to heat the raw material in the Ir crucible to make it melt completely; Adopt the YAlO of b axis according to...

Embodiment 3

[0032] Embodiment 3: preparation Ce 0.0001 mn 0.0001 Y 0.9999 Al 0.9999 o 3 scintillation crystal

[0033] According to the above-mentioned process step (1) take Ce 2 o 3 , MnO 2 , Y 2 o 3 and Al 2 o 3 , where MnO 2 The purity is 99.995%, and the rest are 99.999%; according to the above-mentioned process step (2), the above-mentioned components weighed are fully mixed into a uniform powder; according to the above-mentioned process step (3), the uniformly mixed raw materials are Under pressure, press the mixed powder into a cylindrical cake (the diameter of the cake is slightly smaller than the diameter of the crucible container), and sinter at a temperature of 1200 ° C for 10 hours; according to the above process step (4), pack the fired Enter in the Ir gold crucible in the hearth, adopt medium-frequency induction to heat the raw material in the Ir crucible to make it melt completely; Adopt the YAlO of b axis according to process step (5) 3 (YAP) crystal seeds wer...

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Abstract

The invention relates to a cerium manganese co-doped yttrium (lutetium) aluminate ultra fast scintillation crystal and a preparation method thereof. The chemical formula of the crystal is CexMnyY(Lu)1-xAl1-yO3 which is abbreviated as Ce,Mn: Y(Lu)AP, wherein x and y have the following numeric ranges: x is more than or equal to 0.0001 and less than or equal to 0.01; and y is more than 0.0001 and less than or equal to 0.01. The preparation method adopts a crystal pulling method for growth. The Ce,Mn: Y(Lu)AP crystal has a high crystal optical quality, integrity without cracks, ultra fast scintillation time (10 ns), and a higher photon yield.

Description

technical field [0001] The invention relates to a scintillation crystal, in particular to a cerium-manganese co-doped yttrium (lutetium) aluminate ultrafast scintillation crystal and a preparation method thereof. Background technique [0002] With the development of high-energy physics and nuclear detection technology, the requirements for scintillators are increasing, especially with the rapid development of fast electronics, such as photomultiplier tubes, micro-channel plates and semiconductor detectors. The performance and counting rate of stacking becomes a new hot research issue. The most critical factor to improve these properties is to increase the decay time of scintillation materials, and to find scintillation materials with ultrafast scintillation properties. Ultrafast scintillators usually require decay times on the order of 10 nanoseconds. The most commonly used ultrafast scintillation method is barium fluoride (BaF 2 ) and lead tungstate (PbWO), the fast comp...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B15/36
Inventor 曹顿华赵广军董勤陈建玉丁雨憧程艳王春芳
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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