航空γ能谱探测人工放射性核素检测限研究

倪卫冲; 蔡文军; 高国林

doi:10.11889/j.0253-3219.2018.hjs.41.100202

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航空γ能谱探测人工放射性核素检测限研究

低能加速器技术、射线技术及应用 | 更新时间：2021-05-19

- 航空γ能谱探测人工放射性核素检测限研究
- Study of the detection limit of manmade radionuclide detected by airborne gamma ray spectrometry
- 核技术 2018年41卷第10期文章编号：100202
- 作者机构：
  
  核工业航测遥感中心, 国家核应急航空监测技术支持中心, 国家核应急航空监测中心, 国家核应急救援航空辐射监测分队, 中核集团铀资源地球物理勘查技术中心(重点实验室) 石家庄 050002
- 作者简介：
  
  [ "倪卫冲, 男, 1961年出生, 1983年毕业于成都地质学院(现成都理工大学)放射性地球物理勘探专业, 现为核工业航测遥感中心研究员级高级工程师, 主要从事核与辐射应急航空监测、辐射环境航空测量、核资源与矿产资源航空物探等研究工作", "NI Weichong, male, born in 1961, graduated from Chengdu College of Geology in 1983, research fellow senior engineer of Airborne Survey and Remote Sensing Center of Nuclear Industry, mainly engaged in the research of airborne monitoring in nuclear and/or radiation, airborne survey in radiation environment, airborne geophysical survey in uranium resource and mineral resources" ]
- 基金信息：
  
  国家重点研发计划(2017YFC0602105);国家自然科学基金面上项目(41474107)
- DOI：10.11889/j.0253-3219.2018.hjs.41.100202
  中图分类号： TL751;TL817.2;X837
- 收稿日期：2018-05-09，
  
  修回日期：2018-07-01，
  
  纸质出版日期：2018-10-10
- 稿件说明：
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倪卫冲, 蔡文军, 高国林. 航空γ能谱探测人工放射性核素检测限研究[J]. 核技术, 2018,41(10):100202

Weichong NI, Wenjun CAI, Guolin GAO. Study of the detection limit of manmade radionuclide detected by airborne gamma ray spectrometry[J]. Nuclear techniques, 2018, 41(10): 100202
倪卫冲, 蔡文军, 高国林. 航空γ能谱探测人工放射性核素检测限研究[J]. 核技术, 2018,41(10):100202 DOI： 10.11889/j.0253-3219.2018.hjs.41.100202.

Weichong NI, Wenjun CAI, Guolin GAO. Study of the detection limit of manmade radionuclide detected by airborne gamma ray spectrometry[J]. Nuclear techniques, 2018, 41(10): 100202 DOI： 10.11889/j.0253-3219.2018.hjs.41.100202.

摘要

核与辐射航空监测中人工放射性核素探测下限是衡量核与辐射航空监测能力的一个重要指标。基于大体积NaI（Tl）探测器核与辐射航空监测系统、固定翼飞机（Y-12和Y-5飞机）在全国数个不同辐射背景地区不同飞行高度的测量数据，研究航空γ能谱探测人工放射性核素

137

Cs和

Co探测下限的影响因素。结果表明：随航测高度和航测飞行速度的降低，人工放射性核素的探测下限相应地降低；在同一个航测高度上，探测下限随辐射背景水平而增大；水域上对人工放射性核素的探测下限最低；随人工放射性核素γ射线能量的降低，探测下限反而增大。本次研究为核与辐射航空监测中有效控制影响因素降低人工放射性核素探测下限提供了重要依据。

Abstract

Background

The detection limit of manmade radionuclide in airborne monitoring is an important specification to measure detectable ability of airborne monitoring for nuclear and/or radiation.

Purpose

This study aims to find effect factors of detection limits of manmade radionuclide in airborne monitoring.

Methods

Based on the airborne monitoring data for the airborne monitoring system with NaI(Tl) detectors of the large volume (downward-looking for 50 341 cm

/upward-looking for 12 585 cm

)

Y-12 and Y-5 model wing-fixed aircraft

different altitude

and areas with the different radiation background levels

research diversification of detection limit of manmade radionuclide

137

Cs and

Co.

Results

Detection limits of manmade radionuclides decrease with the reducing of airborne altitude and flight speed. On the same airborne altitude

detection limits are corresponding to largen with the raise of radiation background level. Detection limits of manmade radionuclides are of the minimum on the waters. Detection limits are opposite to largen with the reducing of gamma-ray energy of manmade radionuclides.

Conclusion

Research provides important basis on how to control factors effectively and reduce detection limits of manmade radionuclides.

关键词

Keywords

references

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