The Development and Test of a Portable Food Radioactivity Monitor

Yingjie ZHOU; Haiwei ZHANG; Yue YANG; Qiong HOU; Jun LI; Wei LU; Lei WANG

doi:10.11804/NuclPhysRev.39.2021050

Volume 39 Issue 2

Jun. 2022

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Nuclear Physics Review > 2022 > 39(2): 215-223. > DOI: 10.11804/NuclPhysRev.39.2021050

Yingjie ZHOU, Haiwei ZHANG, Yue YANG, Qiong HOU, Jun LI, Wei LU, Lei WANG. The Development and Test of a Portable Food Radioactivity Monitor[J]. Nuclear Physics Review, 2022, 39(2): 215-223. DOI: 10.11804/NuclPhysRev.39.2021050

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The Development and Test of a Portable Food Radioactivity Monitor

Yingjie ZHOU^1,,
Haiwei ZHANG^1, ,,
Yue YANG¹,
Qiong HOU¹,
Jun LI¹,
Wei LU¹,
Lei WANG^{1, 2,}

1.
College of Nuclear Technology and Automation Engineering, Chengdu University of technology, Chengdu 610059, China
2.
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China

Funds: Major Scientific Instruments and Equipment Development Project of Ministry of Science and Technology(2012YQ18011805);Chengdu Science and Technology Benefiting People Project(2014-HM01-00099-SF); Sichuan Science and Technology Plan Project(2021JDRC0107); Sichuan Science and Technology Plan Project(2021JDRC0068)

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Corresponding author:
Haiwei ZHANG, E-mail: 273048544@qq.com;
Received Date: June 07, 2021
Revised Date: July 26, 2021

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Abstract

Abstract

A portable food radiation monitor has been developed and tested. This paper introduced the measurement structure, nuclear signal processing unit and the analysis application program. The nuclear signal processing unit includes anti-aliasing low-pass filter, programmable gain amplifier, high-speed A/D sampling, digital low-pass filter, trapezoidal shaping, pulse amplitude discrimination, and energy spectrum acquisition unit. The analysis application program includes functions for spectral line smooth, spectral peak-seeking, energy calibration, background deduction and activity calculation. The detection efficiency, the correction coefficient and the MDA of ¹³¹I have been determined. The calibration coefficient has been used to correct the radioactivity measurement results of 300 mL-food sample. The results show that the measurement error of monitor for ¹³¹I radioactivity in the general food is less than 10%, which satisfies the demand of food radioactive measurement.
- portable,
- detection efficiency,
- detection efficiency,
- I-131,
- MDA

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