Thermal properties of a fiber-optic radiation sensor for measuring gamma-rays in high-temperature conditions

A fiber-optic radiation sensor (FORS) was fabricated using a cerium-doped silicate-yttriumlutetium (LYSO:Ce) scintillator crystal and a silica optical fiber (SOF) to measure gamma-rays accurately in elevated temperature conditions. Throughout this study, a LYSO:Ce crystal was employed as a sensing m...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2015, 66(1), , pp.46-50
Main Authors: Jeon, Dayeong, Yoo, Wook Jae, Shin, Sang Hun, Hong, Seunghan, Sim, Hyeok In, Kim, Seon Geun, Jang, Jae Seok, Jang, Kyoung Won, Lee, Bongsoo, Park, Byung Gi, Moon, Joo Hyun
Format: Article
Language:English
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
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Summary:A fiber-optic radiation sensor (FORS) was fabricated using a cerium-doped silicate-yttriumlutetium (LYSO:Ce) scintillator crystal and a silica optical fiber (SOF) to measure gamma-rays accurately in elevated temperature conditions. Throughout this study, a LYSO:Ce crystal was employed as a sensing material of the FORS due to its high light yield (32,000 photons/MeV), fast decay time (≤ 47 ns) and high detection efficiency. Although the LYSO:Ce crystal has many desirable qualities, the thermoluminescence (TL) should be eliminated by using a heat annealing process because the light yield of the LYSO:Ce crystal varies with its TL. In this study, therefore, we obtained the TL curve of the LYSO:Ce crystal by increasing the temperature up to 280 ℃, and we demonstrated that almost all of the TL of the LYSO:Ce crystal was eliminated by the heat annealing process.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.66.46