Characterization of a HgI2 Dosimeter for the Monitoring System of Position Detection of Radioactive Sources in Gamma-Ray Projector

Fields that use non-destructive testing (NDT) invest significant amounts of time and resources toward building a radioactive source monitoring system, for preventing any potential radiation-related accidents. However, various elements that can cause potential radiation accidents due to silicon-based photodiodes are involved. Therefore, research on new materials that can effectively detect high-energy gamma ray is necessary. This study focused on developing a new dosimeter material for a real-time monitoring system that can detect the location of a radioactive source. It was confirmed that the fabricated HgI2 dosimeters have sufficient reproducibility and dose linearity for gamma rays. Based on these results, the HgI2 dosimeter was verified to satisfy the general requirements of NDT source-monitoring systems. These monitoring systems are expected to be easily operable by workers and prevent potential radiation accidents.