To prevent illicit tracking of radionuclides, radiation portal monitor (RPM) systems employing plastic scintillators have been used in ports and airports. However, their poor energy resolution makes the discrimination of radioactive material inaccurate. In this study, an energy weight algorithm was validated to determine 133Ba, 22Na, 137Cs, and 60Co by using a plastic scintillator. The Compton edges of energy spectra were converted to peaks based on the algorithm. The peaks have a maximum error of 6% towards the theoretical Compton edge.
Bibliographical noteFunding Information:
This study was supported by the Korea Institute of Nuclear Safety and Global Ph.D. Fellowship program through the National Research Foundation of Korea ( 201421972 ), and funded by the Nuclear Safety and Security Commission of the Republic of Korea .
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