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 ›› 2020, Vol. 31 ›› Issue (4): 36 doi: 10.1007/s41365-020-0748-2


Photon energy response optimization using few-channel spectroscopy dose method for Si-PIN photodetector applied in personal dose equivalent measurements

Ping Huang1,2 • Shu-Qiong Li1 • Run-Dong Yang2 • Yun-Tian Sun2 • Yong Yang1 • Wu Gao3   

  1. 1 National Institute of Measurement and Testing Technology, Chengdu 610021, China
    2 Sichuan Radiation Technology Co., Ltd, Chengdu 610021, China
    3 Institute of Microelectronics, School of Computer S&T, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2019-11-26 Revised:2020-02-17 Accepted:2020-02-18
  • Contact: Ping Huang
  • Supported by:
    This work was partly supported by the National Key Scientific Instruments to Develop Dedicated Program (Nos. 2013YQ090811 and 2016YFF0103800) and the National Key Research and Development Program (No. 2017YFF0211100).
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Ping Huang, Shu-Qiong Li, Run-Dong Yang, Yun-Tian Sun, Yong Yang, Wu Gao. Photon energy response optimization using few-channel spectroscopy dose method for Si-PIN photodetector applied in personal dose equivalent measurements.Nuclear Science and Techniques, 2020, 31(4): 36     doi: 10.1007/s41365-020-0748-2

Abstract: Si-PIN photodetectors having features such as low cost, small size, low weight, low voltage, and low power consumption are widely used as radiation detectors in electronic personal dosimeters (EPDs). The technical parameters of EPDs based on the Si-PIN photodetectors include photon energy response (PER), angular response, inherent error, and dose rate linearity. Among them, PER is a key parameter for evaluation of EPD measurement accuracy. At present, owing to the limitations of volume, power consumption, and EPD cost, the PER is usually corrected by a combination of single-channel counting techniques and filtering material methods. However, the above-mentioned methods have problems such as poor PER and low measurement accuracy. To solve such problems, in this study, a 1024-channel spectrometry system using a Si-PIN photodetector was developed and fullspectrum measurement in the reference radiation fields was conducted for radiation protection. The measurement results using the few-channel spectroscopy dose method showed that the PER could be controlled within ± 14% and ± 2% under the conditions of two and three energy intervals, respectively, with different channel numbers. The PER measured at 0 angle of radiation incidence meets the - 29% to ?67% requirements of IEC 61526:2010. Meanwhile, the channel number and counts-to-dose conversion factors formed in the experiment can be integrated into an EPD.

Key words: Electronic personal dosimeter, Si-PIN photodetector, Personal dose equivalent, Photon energy response, Few-channel spectroscopy dose method