Journal of Radiation Industry (방사선산업학회지)

Korean Society of Radiation Industry (한국방사선산업학회)
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Determination of Mass Attenuation Coefficient and Self-Attenuation Correction Using the CT Method

CT 방법을 이용한 질량감쇠계수 결정 및 자체감쇠 보정

  • Lee, Jeong-Bin (Department of Nuclear and Radiation Safety, University of Science and Technology) ;
  • Lee, Jun-Ho (Department of Nuclear and Radiation Safety, University of Science and Technology) ;
  • Byun, Jong-In (Center for Environmental Radiation & Radioactivity Assessment, Korea Institute of Nuclear Safety) ;
  • Yun, Ju-Yong (Center for Environmental Radiation & Radioactivity Assessment, Korea Institute of Nuclear Safety)
  • 이정빈 (과학기술연합대학원대학교) ;
  • 이준호 (과학기술연합대학원대학교) ;
  • 변종인 (한국원자력안전기술원) ;
  • 윤주용 (한국원자력안전기술원)
  • Received : 2018.06.14
  • Accepted : 2018.07.10
  • Published : 2018.09.30

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Abstract

In this study, the mass attenuation coefficients for all five of the IAEA reference material samples(apparent density in a measuring bottle: $0.50{\sim}1.45g{\cdot}cm^{-3}$), including soil, milk powder, hay and moss soil, were determined using the CT (Calibration Transmission) method. A certified mixed gamma-ray sources including $^{241}Am$, $^{88}Cd$, $^{57}Co$, $^{113}Sn$, $^{85}Sr$ and $^{137}Cs$ were added to the IAEA reference samples for the validation of present method. The self-attenuation correction factors for the gamma-ray energies of 59.5 keV, 88 keV, 122.1 keV, 391.7 keV, 514 keV and 661.7 keV were determined and applied to the self-attenuation correction. As a result, the accuracy of gamma-ray spectrometry for environmental samples used in this study was improved especially for lower energy gamma-ray emitting radionuclides.

Keywords

References

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