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<p>After the Fukushima accident, numerous portable radiation measurement devices have been introduced at customs sites, including airports and harbors, for radiation inspection. However, most of these devices have limitations in isotope identification and radiation imaging, which can compromise the safety of customs operations. In this study, we developed a prototype hand-held-type gamma imaging device (pHGI) for the Korea Customs Service. The pHGI was composed of a small-sized CZT detector&#xa0;capable of&#xa0;4π Compton imaging, an RGB camera, and a battery pack, all housed within a dedicated case. An automatic isotope identification method, based on the Becquerel library, and a Compton imaging method were implemented in the graphical user interface program for the pHGI. The performance of the pHGI was experimentally evaluated under various source conditions. The results showed that the pHGI automatically identified all of the nuclides with high energy resolution (0.82% @662&#xa0;keV). The pHGI was also capable of imaging all identified isotopes independently. It was confirmed that the pHGI can not only identify the radioisotopes but also localize radioactive materials. These findings suggest that the pHGI has the potential to improve the efficiency of the customs work and the safety of the workers in the customs sites.</p>

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Development of a prototype hand-held-type gamma imaging device for Korea Customs Service

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • Jae Hyeon Kim,
  • Kyung Min Oh,
  • Jin Hyung Park,
  • Han Soo Kim,
  • Jang Ho Ha,
  • Junyoung Lee,
  • Goeun Lee

摘要

After the Fukushima accident, numerous portable radiation measurement devices have been introduced at customs sites, including airports and harbors, for radiation inspection. However, most of these devices have limitations in isotope identification and radiation imaging, which can compromise the safety of customs operations. In this study, we developed a prototype hand-held-type gamma imaging device (pHGI) for the Korea Customs Service. The pHGI was composed of a small-sized CZT detector capable of 4π Compton imaging, an RGB camera, and a battery pack, all housed within a dedicated case. An automatic isotope identification method, based on the Becquerel library, and a Compton imaging method were implemented in the graphical user interface program for the pHGI. The performance of the pHGI was experimentally evaluated under various source conditions. The results showed that the pHGI automatically identified all of the nuclides with high energy resolution (0.82% @662 keV). The pHGI was also capable of imaging all identified isotopes independently. It was confirmed that the pHGI can not only identify the radioisotopes but also localize radioactive materials. These findings suggest that the pHGI has the potential to improve the efficiency of the customs work and the safety of the workers in the customs sites.