Experimental and numerical studies for understanding of radon emanation in environmental materials

Sakoda, Akihiro   ; Ishimori, Yuu  

Numerous studies have experimentally and numerically been made to understand the first process "radon emanation" leading to radon exposure. We made an extensive review of previous emanation measurements, including our results, for more than a thousand samples. The discussion was made with respect to issues such as the representative values of radon emanation fraction for environmental materials and the measurement method. In addition, we have numerically simulated the emanation process to investigate the impacts of environmental factors. The discrepancies between the observed and calculated data were seen depending on a factor, which should be studied further in the future.