수중의 222Rn 분석법 정립
The Study for the Evaluation of the Method for 222Rn in Water
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Abstract
The instrumentation used to count 222Rn activity was liquid scintillation counter (LSC) which could resolute α and β radiations. The optimal scintillation liquid (High Efficiency Mineral OilTM) for Radon analysis was selected and the combination ratio for scintillation liquid and sample was founded as 1:1. Efficiencies and Spillover values were investigated for determining optimal Pulse Shape Discriminator (PSD) level for better discrimination between α and β radiations. The Minimum detectable activity (MDA) value was 0.04 Bq/L when the PSD level was 100. Samples were measured for 150 minutes using low diffusion polyethylene vessel and high Efficiency Mineral OilTM
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