CT 방법을 이용한 질량감쇠계수 결정 및 자체감쇠 보정
Determination of Mass Attenuation Coefficient and Self-Attenuation Correction Using the CT Method
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초록
In this study, the mass attenuation coefficients for all five of the IAEA referencematerial samples (apparent density in a measuring bottle: 0.50~1.45 g·cm-3), including soil, milkpowder, hay and moss soil, were determined using the CT (Calibration Transmission) method. Acertified mixed gamma-ray sources including 241Am, 88Cd, 57Co, 113Sn, 85Sr and 137Cs were added tothe IAEA reference samples for the validation of present method. The self-attenuation correctionfactors for the gamma-ray energies of 59.5 keV, 88 keV, 122.1 keV, 391.7 keV, 514 keV and 661.7keV were determined and applied to the self-attenuation correction. As a result, the accuracy ofgamma-ray spectrometry for environmental samples used in this study was improved especiallyfor lower energy gamma-ray emitting radionuclides.
Abstract
In this study, the mass attenuation coefficients for all five of the IAEA referencematerial samples (apparent density in a measuring bottle: 0.50~1.45 g·cm-3), including soil, milkpowder, hay and moss soil, were determined using the CT (Calibration Transmission) method. Acertified mixed gamma-ray sources including 241Am, 88Cd, 57Co, 113Sn, 85Sr and 137Cs were added tothe IAEA reference samples for the validation of present method. The self-attenuation correctionfactors for the gamma-ray energies of 59.5 keV, 88 keV, 122.1 keV, 391.7 keV, 514 keV and 661.7keV were determined and applied to the self-attenuation correction. As a result, the accuracy ofgamma-ray spectrometry for environmental samples used in this study was improved especiallyfor lower energy gamma-ray emitting radionuclides.
참고문헌 (7)
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