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使用便携式高纯锗γ能谱仪对地表放射性进行原位γ射线分析。

In-situ γ-ray analysis of ground surface radioactivity using portable HPGe γ spectrometer.

作者信息

Wu Zeqian, Wang Bairong, Sun Jian, Wang Yuqi, Zhao Changwei

机构信息

Institute of NBC Defence, Changping District, Beijing, 102205, China.

College of Resources and Environmental Sciences, China Agricultural University, Haidian District, Beijing, 100193, China.

出版信息

Sci Rep. 2022 Jun 8;12(1):9418. doi: 10.1038/s41598-022-13770-5.

DOI:10.1038/s41598-022-13770-5
PMID:35676527
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9177564/
Abstract

As essential high-end equipment for nuclear emergency monitoring, the portable HPGe γ spectrometer currently lacks supporting in-situ measurement methods, limiting its role and value in emergency missions. For this practical problem, this paper studies the measurement of ground surface radioactivity by portable HPGe γ spectrometer in nuclear emergency monitoring in view of the particularity of nuclear emergency source items. Firstly, the detection efficiency of point sources at different horizontal distances when the spectrometer is installed at the height of 1 m from the center of the detector to the ground is calculated. Secondly, the concept of effective contribution distance is defined and analyzed. Thirdly, the point source detection efficiency is obtained using the numerical integration method of calculation. Integrate to calculate the detection efficiency of the surface source, and then calculate the radioactive surface activity of the surface. Finally, the effectiveness of the method is verified through experiments.

摘要

作为核应急监测的必备高端设备，便携式高纯锗γ能谱仪目前缺乏配套的现场测量方法，限制了其在应急任务中的作用和价值。针对这一实际问题，本文鉴于核应急源项的特殊性，研究便携式高纯锗γ能谱仪在核应急监测中对地表放射性的测量。首先，计算能谱仪安装在距探测器中心到地面高度为1米时，不同水平距离处点源的探测效率。其次，定义并分析有效贡献距离的概念。第三，采用数值积分计算方法获得点源探测效率。积分计算面源的探测效率，进而计算地表的放射性表面活度。最后，通过实验验证该方法的有效性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/1e617718c75d/41598_2022_13770_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/1193b7131056/41598_2022_13770_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/0374befe2ae9/41598_2022_13770_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/05756afe04f1/41598_2022_13770_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/5dfd5f859a0b/41598_2022_13770_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/fbada9c72a9d/41598_2022_13770_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/27bcf6e8d7bf/41598_2022_13770_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/183a43b8c1b6/41598_2022_13770_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/1e617718c75d/41598_2022_13770_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/1193b7131056/41598_2022_13770_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/0374befe2ae9/41598_2022_13770_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/05756afe04f1/41598_2022_13770_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/5dfd5f859a0b/41598_2022_13770_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/fbada9c72a9d/41598_2022_13770_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/27bcf6e8d7bf/41598_2022_13770_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/183a43b8c1b6/41598_2022_13770_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db3a/9177564/1e617718c75d/41598_2022_13770_Fig8_HTML.jpg

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本文引用的文献

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Application of a new calibration technique for gamma spectrometry and comparison of and laboratory measurements.应用一种新的伽马能谱标定技术并对实验室测量进行比较。
Arh Hig Rada Toksikol. 2021 Mar 30;72(1):29-35. doi: 10.2478/aiht-2021-72-3468. Print 2021 Mar 1.
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Sci Rep. 2018 Sep 20;8(1):14115. doi: 10.1038/s41598-018-32220-9.
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InSiCal——一种用于计算原位伽马能谱校准因子和活度浓度的工具。
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