Measurement of Absorbed Dose at the Tissue Surface from a Plain $^{90}Sr+^{90}Y$ Beta Sources

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  • Hah, Suck-Ho (Korea Research Institute of Standard and Science, Rdia. Lab.) ;
  • Kim, Jeong-Mook (Korea atomic Energy Research Institute, Neclear Environment Management Center) ;
  • Yook, Chong-Chul (Department of Nuclear Engineering, Hanyang University)
  • 하석호 (한국표준과학연구원 방사선연구실) ;
  • 김정묵 (한국원자력연구소 원자력환경관리센터) ;
  • 육종철 (한양대학교 원자력공학과)
  • Published : 1991.12.30


Beta ray $(^{90}Sr+^{90}Y)$ absorbed dose at tissue surface was measured from the distance of 30cm by use of extrapolation chamber. In the measurement, following factors were considered: effective area of collecting electrode, polarity effect, ion recombination and window attenuation. The measured absorbed dose rate at tissue surface was $1.493{\mu}Gy/sec$ with ${\pm}2.9%$.