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

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...

AI Technical Summary

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-fast blinking time (10ns)

To sum up, the current ultrafast scintillation materials have problems such as low light yield and too large proportion of slow components to varying degrees, while cerium ion-doped inorganic oxide scintillation crystals have good prospects, but there are still some problems. The problem of too long blinking time is far from meeting the needs of ultra-fast detection

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