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放射性工作场所放射性气溶胶监测是辐射防护工作中的一项极其重要的内容,目前大多采用滤材取样的相对测量法。要通过滤材取样测量空气中的气溶胶浓度,就必须定出包括自吸收校正在内的滤材过滤效率因子F。F与多种因素有关,且随测量条件而变化。下面介绍用正反面计数率之比测定F的方法。此法较为简便,而又不失现有方法的准确度。
Radiation aerosol monitoring in radioactive workplaces is an extremely important part of radiation protection efforts, and the relative measurement of filter media sampling is currently mostly used. To sample the aerosol concentration in the air through a sampling of the filter material, filter efficiency factor F, including self-absorption correction, must be set. F depends on many factors and varies with the measurement conditions. The following describes the use of positive and negative ratio of the ratio of F method. This method is relatively simple, without losing the accuracy of existing methods.