Thermal properties of a fiber-optic radiation sensor for measuring gamma-rays in high-temperature conditions
- 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
- Issue Date
- Jan-2015
- Publisher
- 한국물리학회
- Keywords
- Fiber-optic radiation sensor; LYSO; Gamma-ray spectroscopy; Thermoluminescence; Temperature
- Citation
- Journal of the Korean Physical Society, v.66, no.1, pp 46 - 50
- Pages
- 5
- Journal Title
- Journal of the Korean Physical Society
- Volume
- 66
- Number
- 1
- Start Page
- 46
- End Page
- 50
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/10985
- DOI
- 10.3938/jkps.66.46
- ISSN
- 0374-4884
1976-8524
- 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 (a parts per thousand currency sign 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 a"integral, 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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