Attenuation characteristics of a Ce:Gd3Al2Ga3O12 scintillator

被引：0
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作者：
Uchida, Nagomi [1 ]
Takahashi, Hiromitsu [1 ]
Ohno, Masanori [1 ,2 ,3 ]
Mizuno, Tsunefumi [1 ]
Fukazawa, Yasushi [1 ]
Yoshino, Masao [4 ]
Kamada, Kei [5 ]
Yokota, Yuui [5 ,6 ]
Yoshikawa, Akira [4 ,5 ,6 ]
机构：
[1] Hiroshima University, Department of Physical Science, Hiroshima,739-8526, Japan
[2] Eötvös University, Institute of Physics, Pázmány Péter sétány 1/A, Budapest,1117, Hungary
[3] MTA-Eötvös University Lendület Hot Universe and Astrophysics Research Group, Pázmány Péter sétány 1/A, Budapest,1117, Hungary
[4] Institute for Materials Research (IMR), Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi,980-8577, Japan
[5] New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi,980-8579, Japan
[6] C & A corporation, T-Biz, 6-6-40, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi,980-8579, Japan
来源：
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2021年 / 986卷
基金：
日本学术振兴会;
关键词：
Light - Geometry - Scintillation counters - Gallium compounds - Photons - Aluminum compounds - Cerium compounds - Scintillation;
D O I：
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中图分类号：
学科分类号：
摘要：
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 0.001550.00006 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. © 2020 Elsevier B.V.
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