期刊
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
卷 75, 期 12, 页码 962-967出版社
KOREAN PHYSICAL SOC
DOI: 10.3938/jkps.75.962
关键词
Scintillator; Light output; Energy resolution; Gamma-rays; X-ray Photoelectron Spectroscopy
资金
- National Research Foundation of Korea [NRF-2018M2A8A4024283, NRF-2017M2A2A4A01071240, NRF-2017M2A2A6A02020807, NRF-2016M2B2A9A02945226]
- MSIT (Ministry of Science and ICT), Korea, under the ITRC (Information Technology Research Center) support program [IITP-2019-1711093226]
- National Research Foundation of Korea [2017M2A2A4A01071240, 2017M2A2A6A02020807, 2016M2B2A9A02945226] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
An as-fabricated cerium-doped ceramic scintillator Gd3Al2Ga3O12 (Ce:GAGG) was thermally annealed at different temperatures. The light output and energy resolution of the scintillators were measured before and after thermal treatment. The effect of thermal annealing in the air at high temperature (at 1000 degrees C for 5 hours) deforms the microstructure by mitigating oxygen vacancies of the ceramic scintillator. This has been proven by XPS study that showed the existence of oxygen vacancies and subsequent decrease of oxygen deficiency amid annealing treatment that led to an output signal increase. The diffusion ability of oxygen atoms by annealing played a key role in compensating for defect sites. In this study, by controlling thermodynamic conditions, the light output was enhanced by similar to 30.4% and the energy resolution improved by similar to 2.4% after annealing at 1000 degrees C in the air.
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