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Attenuation characteristics of a Ce:Gd3Al2Ga3O12 scintillator
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment ( IF 1.5 ) Pub Date : 2020-10-07 , DOI: 10.1016/j.nima.2020.164725
Nagomi Uchida , Hiromitsu Takahashi , Masanori Ohno , Tsunefumi Mizuno , Yasushi Fukazawa , Masao Yoshino , Kei Kamada , Yuui Yokota , Akira Yoshikawa

Attenuation characteristics of scintillation photons from Ce-doped Gd3Al2Ga3O12 (Ce:GAGG) scintillators were investigated by measuring samples of various sizes. Scintillation light is attenuated by two factors. The first is self-absorption of the Ce:GAGG scintillator itself, and the second is geometrical effects such as reflection properties caused by reflector wrapping. The attenuation coefficient of the Ce:GAGGs was determined as 0.00155±0.00006 mm −1 indicating that the scintillation light decays to 1/e as it passes approximately 645 ± 26 mm through the Ce:GAGG. This attenuation does not affect the entire wavelength range; however, it significantly occurs only in the wavelength range from 460 nm to 510 nm where emission and absorption overlap. In the narrow Ce:GAGG scintillator used in this experiment, the geometrical attenuation effect was in the overall wavelength, and the attenuation coefficient was 0.010 ± 0.001 mm −1. In this setup, the self-absorption effect only occupied 10% of the whole attenuation, while geometrical attenuation significantly affected the number of detected photons.



中文翻译:

Ce:Gd 3 Al 2 Ga 3 O 12闪烁体的衰减特性

通过测量各种尺寸的样品,研究了掺Ce的Gd 3 Al 2 Ga 3 O 12(Ce:GAGG)闪烁体产生的闪烁光子的衰减特性。闪烁光被两个因素衰减。第一个是Ce:GAGG闪烁体本身的自吸收,第二个是几何效应,例如由反射器包裹引起的反射特性。Ce:GAGGs的衰减系数确定为000155±000006mm -1表示闪烁光通过Ce:GAGG约645±26 mm时衰减至1 / e。这种衰减不会影响整个波长范围。但是,它仅在发射和吸收重叠的460 nm至510 nm波长范围内显着发生。在本实验中使用的窄Ce:GAGG闪烁体中,几何衰减效应在整个波长范围内,衰减系数为0.010±0.001 mm -1。在这种设置中,自吸收效应仅占整个衰减的10%,而几何衰减则显着影响检测到的光子数量。

更新日期:2020-10-11
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