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

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Abstract

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.

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Authors and Affiliations

  1. School of Biomedical Engineering, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University, Chungju, 380-701, Korea

    Dayeong Jeon, Wook Jae Yoo, Sang Hun Shin, Seunghan Hong, Hyeok In Sim, Seon Geun Kim, Jae Seok Jang, Kyoung Won Jang & Bongsoo Lee

  2. Department of Energy & Environment Engineering, College of Engineering, Soonchunhyang University, Asan, 336-745, Korea

    Byung Gi Park

  3. Department of Nuclear & Energy System Engineering, College of Natural Science, Dongguk University-Gyeongju, Gyeongju, 780-714, Korea

    Joo Hyun Moon

Authors
  1. Dayeong Jeon
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  2. Wook Jae Yoo
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  3. Sang Hun Shin
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  4. Seunghan Hong
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  5. Hyeok In Sim
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  6. Seon Geun Kim
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  7. Jae Seok Jang
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  8. Kyoung Won Jang
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  9. Bongsoo Lee
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  10. Byung Gi Park
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  11. Joo Hyun Moon
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Corresponding author

Correspondence to Bongsoo Lee.

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Jeon, D., Yoo, W.J., Shin, S.H. et al. Thermal properties of a fiber-optic radiation sensor for measuring gamma-rays in high-temperature conditions. Journal of the Korean Physical Society 66, 46–50 (2015). https://doi.org/10.3938/jkps.66.46

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  • DOI: https://doi.org/10.3938/jkps.66.46

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