Journal of Radiation Protection and Research

The Korean Association for Radiation Protection (대한방사선방어학회)
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A Practical and Simple Method of Self-absorption Correction for Environmental Samples

실용적이고 간단한 환경시료의 감마핵종 자체흡수보정 방법

  • Lee, Wan-No (Nuclear Environment Research Division, Korea Atomic Energy Research Institute) ;
  • Lee, Haeng-Pil (Water & Sediment Analysis Team, Korea Institute of Coastal Ecology, Inc) ;
  • Chung, Kun-Ho (Nuclear Environment Research Division, Korea Atomic Energy Research Institute) ;
  • Cho, Young-Hyun (Nuclear Environment Research Division, Korea Atomic Energy Research Institute) ;
  • Choi, Geun-Sik (Nuclear Environment Research Division, Korea Atomic Energy Research Institute) ;
  • Lee, Chang-Woo (Nuclear Environment Research Division, Korea Atomic Energy Research Institute) ;
  • Chung, Hyung-Wook (Department of Food Evaluation, Korea Food and Drug Administration) ;
  • Lee, Eun-Ju (Department of Food Evaluation, Korea Food and Drug Administration) ;
  • Sho, You-Sup (Department of Food Evaluation, Korea Food and Drug Administration) ;
  • Lee, Jong-Ok (Department of Food Evaluation, Korea Food and Drug Administration)
  • 이완로 (한국원자력연구소 원자력환경연구부) ;
  • 이행필 (한국연안환경생태연구소 수질.퇴적물 분석팀) ;
  • 정근호 (한국원자력연구소 원자력환경연구부) ;
  • 최근식 (한국원자력연구소 원자력환경연구부) ;
  • 조영현 (한국원자력연구소 원자력환경연구부) ;
  • 이창우 (한국원자력연구소 원자력환경연구부) ;
  • 정형욱 (식품의약품안전청 식품평가부) ;
  • 이은주 (식품의약품안전청 식품평가부) ;
  • 소유섭 (식품의약품안전청 식품평가부) ;
  • 이종옥 (식품의약품안전청 식품평가부)
  • Published : 2006.03.31
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Abstract

A self-absorption correction is important issue for the exact radioactivity determination of gamma emitting radionuclides in environmental samples which have the range of apparent density from $0.3g/cm^3$ up to $1.5g/cm^3$. In this paper, a practical and simple method without radioactive standard solutions having various densities is proposed for the self-absorption correction of environmental samples by a developed outside beaker surrounding Marinelli beaker. For the densities of 0.8, 1.0, $1.3g/cm^3$, the corrected efficiencies by the new method and the measured those by radioactive standard solutions of the three densities showed good agreement within 4 %.

$0.3g/cm^3$ 에서 $1.5g/cm^3$까지 다양한 겉보기 밀도를 갖는 감마방출핵종 환경시료의 정확한 방사능 분석을 위해서 자체흡수보정(self-absorption correction)은 중요한 문제이다. 방사선 표준선원을 밀도별로 제작할 필요없이 마리넬리 비커를 감싸는 외부용기를 새롭게 제작하여 실용적이면서 간단한 자체흡수보정방법을 본 논문에서 제시하였다. 밀도 0.8, 1.0, $1.3g/cm^3$ 대해서 새로운 방법을 이용하여 자체흡수보정을 한 효율들과 밀도별로 직접 표준선원용액을 만들어 측정한 효율값이 4 % 이내에서 일치하였다.

Keywords

References

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