Measurement and Analysis of X-ray Absorbed Dose in Water Phantom using TLD

TLD를 이용한 X-선 수중 흡수선량 측정 및 해석

  • Oh, Jang-Jin (Department of Physics, Chungnam National University) ;
  • Jun, Jae-Shik (Department of Physics, Chungnam National University) ;
  • Hah, Suck-Ho (Radiation Laboratory, Korea Standards Research Institute) ;
  • Kim, Wuon-Shik (Radiation Laboratory, Korea Standards Research Institute) ;
  • Hwang, Sun-Tae (Radiation Laboratory, Korea Standards Research Institute)
  • 오장진 (충남대학교 물리학과) ;
  • 전재식 (충남대학교 물리학과) ;
  • 하석호 (한국표준연구소 방사선연구실) ;
  • 김원식 (한국표준연구소 방사선연구실) ;
  • 황선태 (한국표준연구소 방사선연구실)
  • Published : 1988.12.20

Abstract

Absorbed dose in water was analyzed by Burlin's general cavity theory for medium X-ray energy region (HVL : 0.29, 0.84, 1.60, 2.62mm Cu) using LiF : PTFE TL dosimeter(0.4 mm ${\times}\;{\phi}$ 12.5mm, hot-pressed LiF TLD-700) which was enclosed in lucite capsule. The absorbed dose rate at 5cm depth in water phantom was determined with measurement error of ${\pm}5%$. This result was compared to that of the ionization method, indirectly absolute measurement method, of which measurement error of ${\pm}2%$. The difference between these two results lies within measurement error of LiF : PTFE method. Therefore, the absorbed dose in water obtained by LiF: PTFE is reliable, and this result suggests the base to estimate dose-equivalent for medium X-rays.

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