Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (9): 132 doi: 10.1007/s41365-019-0658-3


Design of CsI(TI) detector system for searching lost radioactive source

Waseem Khan, Chao-Hui He, Qing-Min Zhang, Yu Cao, Wei-Tao Yang   

  1. Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2019-02-14 Revised:2019-05-11 Accepted:2019-05-14
  • Contact: Chao-Hui He
  • Supported by:
    This research was conducted at Xi’an Jiaotong University and was fully supported by key research and development plan of Shandong Province (No. 2017CXGC0916) and the Chinese government.
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Waseem Khan, Chao-Hui He, Qing-Min Zhang, Yu Cao, Wei-Tao Yang. Design of CsI(TI) detector system for searching lost radioactive source.Nuclear Science and Techniques, 2019, 30(9): 132     doi: 10.1007/s41365-019-0658-3

Abstract: This report presents a design system based on the use of CsI(TI) detectors to search for lost radioactive sources that are dangerous and harmful to individuals, including searching persons. For this purpose, the GEANT4 simulation toolkit was utilized to develop a system based on three detectors. Various simulated analyses were performed on the dose rates of the three detectors using different source–detector distances and detector separation. There were good agreement between the simulated results and the experimentally measured data. A new method was discussed to detect and search for radioactive sources based only on the dose rates in detectors with source activity. Numerical analyses were performed based on the measured dose rates and the difference of distances to determine the actual location of the lost single or multiple c-ray sources at a specific angle. The detection limit was calculated from the background radiation to establish the sensitivity and capability of the proposed detector system. This system can be applied in fields in which it is necessary to locate unknown radioactive sources.

Key words: GEANT4 , gamma-Ray source, CsI(TI) detectors