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本文介绍电离辐射计量中的不确定度评定的三个具体例子，用液体闪烁计数器测定放射性核素的活度，用含氯正比计数管测量单能快中子注量和用自由空气电离室复现照射量和空气比释动能，给出了不确定度的各个分量以及合成标准不确定度的结果。一、液体闪烁计数器测量放射性活应1．
This article presents three specific examples of the assessment of the uncertainty in ionizing radiation mea- surements. The radionuclide activity is measured with a liquid scintillation counter. The single-energy fast neutron fluence is measured with a chlorine-containing proportional counter tube and the free-air ionization chamber Now the amount of irradiation and air kerma, given the uncertainty of the various components and the results of the synthesis of standard uncertainty. First, the liquid scintillation counter measures radioactivity 1.