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Energy response correction for an electronic personal dosimeter using the channel ratio method

Nuclear Science and Techniques

2017

Ping Huang、 You-De Zhang、Yong Yang、 Cong-Hua Zhang

輻射所

An electronic personal dosimeter mainly uses a Si-PIN photodiode as X- and gamma-ray detectors. The photon energy response of this instrument is inconsistent in the case of no correction, which seriously affects the accurate monitoring of personal dose equivalent H p (10)parameters for radiation workers. For this reason, in this paper we propose a method of combining composite screen detection technology, multichannel measurement technology, and the channel ratio method to achieve accurate measurement of the personal dose equivalent parameters. According to China National Standard GB/T 13161-2003 and National Verification Regulation JJG 1009-2006, the instrument was tested in the energy range between 48 keV and 1.25 MeV. The experimental results showed that the difference of energy response to 137 C s corrected by the new method was almost constant within ?6:0%, which fulfilled the ?30% requirement of GB/T 13161-2003 and JJG 1009-2006. Meanwhile, the method proposed obtained energy information regarding the radiation field.