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| Development of a portable radiation detector for nuclide identification based on CdZnTe |
| XIONG Wenjun1, YAN Qiang2, WANG Ying3, HUANG Jinfeng1, ZHONG Huaqiang1 |
1. Ratection Co., LTD., Guangzhou, Guangzhou 510000 China;
2. Shenzhen University, Shenzhen 518060 China;
3. China Institute of Atomic Energy, Beijing 102413 China |
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Abstract Objective To develop a portable nuclear radiation detector with low-energy γ-nuclide recognition capability for rapid measurement of the dose levels in low-energy radiation fields and identification of nuclides. Methods A digital multi-channel circuit was developed for a detector based on the room temperature semiconductor cadmium zinc telluride, nuclide recognition was achieved using an intelligent nuclide recognition algorithm, and the energy response function G(E) was used to calculate the real-time ambient dose equivalent rate H*(10). Results The portable spectrometer had a minimum detectable energy of 20 keV, and the typical energy resolution for low-energy X-rays was > 4.10% at 59.5 keV and 20℃, enabling accurate identification of 241Am nuclide. Conclusion The device has a good measurement performance for low-energy γ/X rays, effectively addressing the limitations of existing devices for monitoring low-energy radiation fields, and provide reliable technical methods for monitoring and emergency response in spent fuel reprocessing plants or nuclear material production plants.
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Received: 13 December 2022
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