摘要
220Rn的准确测量是天然辐射照射剂量评价体系中的重要研究内容之一。基于常用的几种测氡仪,我们开发了它们的220Rn测量功能,并比较了它们的220Rn测量结果。结果表明,AB5抓取式测量方法其原理简单,测量结果稳定,可以作为220Rn测量的参考方法,但其探测下限较高;RAD7的220Rn测量结果受干燥剂状态的影响,需要适时刻度;AlphaGuard流气式测量虽然具有探测下限低的优点,但结果易受采样流速和前端采样管路状况的影响,只能作一般性参考。
The accurate measurement of ^220Rn is important for dosimetry evaluation of natural radiation exposure. In thiswork, based on three commonly used radon measuring devices, i.e. AB5, RAD7 and, AlphaGuard, we developed their use for ^220Rn measurement, and their experimental results were compared. The AB5 grab measurement method is simple in principle with stable measurement results, and can be used as a reference method of measuring ^220Rn, through its lower detection limit is a little higher. The ^220Rn measurement result given by RAD7 is influenced by the status of desiccant and need a timely calibration. AlphaGuard flow mode has the advantage of low detection limit, but can only be a general reference, because of its samoling flow rate and the status of front-end sampling pipe .
出处
《核技术》
CAS
CSCD
北大核心
2010年第4期294-296,共3页
Nuclear Techniques
基金
国家自然科学基金(10475006)资助
关键词
220Rn
准确测量
比对实验
参考标准
^220Rn, Accurate measurement, Comparative experiment, Reference method
