Iimoto Takeshi, Tokonami Shinji, Morishita Yasuaki, Kosako Toshiso
Research Center for Nuclear Science and Technology, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan.
J Environ Radioact. 2005;78(1):69-76. doi: 10.1016/j.jenvrad.2004.03.037.
Most commercially based activated charcoal radon collectors were designed for use in indoor environments. However, at present, they are often used for research in radon surveys in unique environments, such as in the bathrooms, underground areas, mines, caves and tunnels. In these environments, the relative humidity would be around 100%, and a change in the sensitivity of cpm(Bq m(-3))(-1)(radon) would occur. For this study, the reduction in the sensitivity of activated charcoal radon collector due to environmental humidity was investigated, and the data correction was discussed. Here, ST-100 (Pico-Rad) was selected as an example of a familiar activated charcoal radon collector. According to our performance test, the humidity of 90% (20 degrees C) resulted in a 15% reduction of the sensitivity for 24 h collection. The ST-100 user should discuss the necessity of data correction by comparing the change of sensitivity with other levels of estimation errors.
大多数基于商业用途的活性炭氡气收集器是为室内环境设计的。然而，目前它们经常被用于独特环境中的氡气调查研究，比如浴室、地下区域、矿井、洞穴和隧道。在这些环境中，相对湿度可能会达到100%左右，并且每立方米贝克勒尔（Bq m(-3)）（氡）的计数率灵敏度会发生变化。在本研究中，对环境湿度导致的活性炭氡气收集器灵敏度降低情况进行了调查，并讨论了数据校正问题。在此，选择ST - 100（Pico - Rad）作为常见活性炭氡气收集器的一个例子。根据我们的性能测试，90%（20摄氏度）的湿度会导致24小时收集灵敏度降低15%。ST - 100的用户应通过将灵敏度变化与其他估计误差水平进行比较，来讨论数据校正的必要性。
