论文部分内容阅读
适用于能量法快速测量空气中人工核素(如钚-239等)α放射性气溶胶的取样滤纸,应具有自吸收小的特点,以便降低α放射性能谱畸变并提高测量灵敏度。目前,常用的国产一号超细纤维滤纸,由于自吸收大,不能满足能谱测量的要求。因此,我们选用硝酸纤维微孔滤膜。其主要特点是过滤效率高,表面收集特性好,自吸收小,能量分辨本领高。考虑到它作为能谱测量取样的这些优越性,我们在实验室中初步进行了试制。本文就滤膜的制备方法、性能参数及取样实验结果作一简要介绍。
For the rapid measurement of energy by artificial radionuclides in the air (such as plutonium -239, etc.) α radioactive aerosol sampling filter paper, should have the characteristics of small self-absorption in order to reduce α-ray emission spectrum distortion and improve the measurement sensitivity. At present, the commonly used homemade microfiber filter paper, due to self-absorption, can not meet the requirements of energy spectrum measurement. Therefore, we use nitric acid fiber microporous membrane. Its main features are high filtration efficiency, surface collection characteristics, self-absorption, high energy resolution skills. Taking into account its superiority as a sampling of the energy spectrum, we conducted a preliminary trial in the laboratory. In this paper, the preparation of the membrane, the performance parameters and sampling experimental results for a brief introduction.