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KMID : 0896219990190010037
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Journal of Daegu Health College
1999 Volume.19 No. 1 p.37 ~ p.44
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Fabrication of TLDs and Its Measurement of Absorbed Dose Distribution for Electron
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Park Myeong-Hwan
Kim Seong-Hwan
Lee Joon-Il
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Abstract
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In this study, the highly sensitive CaSO₄:Tm-PTFE TLDs has been fabricated for the purpose of measurement of high energy electron. CaSO₄:Tm phosphor powder was mixed with polytetrafluoroethylene(PTFE) powder and moulded in a disk type(diameter 8.5㎜, thickness 90㎎/㎠) by cold pressing. The batch uniformities were average deviation 3.1%. The TLDs were determined to be R_(100)＝14.5㎜, R_(50)＝24.1㎜ and R_(p)＝31.8㎜, respectively. The beam flatness were 4.5% as the variation of dose relative to the central axis over the central 80% of the field size at a maximum dose depth in a plane perpendicular to the central axis.
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