辐射监测气溶胶制样方法测试对比

石夏青; 於国兵; 顾先宝; 张瑜; 赵俊; 陈志; 徐榭

doi:10.11889/j.0253-3219.2016.hjs.39.030402

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辐射监测气溶胶制样方法测试对比

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- 辐射监测气溶胶制样方法测试对比
- Test and comparison of aerosol sample preparation methods in radiation monitoring
- 核技术 2016年39卷第3期文章编号：030402
- 作者机构：
  
  1.中国科学技术大学合肥 230027;
  2.安徽省辐射环境监督站合肥 230071;
  3.环保部辐射环境监测技术中心杭州 310012
- 作者简介：
  
  石夏青,女,1991年出生,2013年毕业于中国科学技术大学,现为硕士研究生,主要从事核探测与辐射防护研究
  陈志,E-mail:zchen@ustc.edu.cn
- 基金信息：
  
  安徽省省级环保科研课题项目(No.2014-011)、国家自然科学基金(No.11375182)资助()
- DOI：10.11889/j.0253-3219.2016.hjs.39.030402
  中图分类号： TL816.4
- 收稿日期：2015-12-07，
  
  录用日期：2016-02-16，
  
  纸质出版日期：2016-01-25
- 稿件说明：
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石夏青, 於国兵, 顾先宝, 等. 辐射监测气溶胶制样方法测试对比[J]. 核技术, 2016,39(3):030402

Xiaqing SHI, Guobing YU, Xianbao GU, et al. Test and comparison of aerosol sample preparation methods in radiation monitoring[J]. Nuclear techniques, 2016, 39(3): 030402
石夏青, 於国兵, 顾先宝, 等. 辐射监测气溶胶制样方法测试对比[J]. 核技术, 2016,39(3):030402 DOI： 10.11889/j.0253-3219.2016.hjs.39.030402.

Xiaqing SHI, Guobing YU, Xianbao GU, et al. Test and comparison of aerosol sample preparation methods in radiation monitoring[J]. Nuclear techniques, 2016, 39(3): 030402 DOI： 10.11889/j.0253-3219.2016.hjs.39.030402.

摘要

利用高纯锗(HPGe) γ谱仪对4种放射性气溶胶制样方法(灰化法、压片法、打孔法和折叠法)制得的样品进行了分析测试研究

4种制样方法对同一活度样品的分析结果的标准偏差在5%以内

验证了此4种方法的可靠性。利用标准源实验刻度和蒙特卡罗模拟计算

得到4种制样方法的探测效率从高到低依次是:灰化法、压片法、打孔法和折叠法

对于辐射监测常用的260mm

#215;210mm滤膜

4种制样方法的探测效率最大相差55%;对于570mm

#215;470mm的滤膜

则相差120%。以

137

Cs为例

对比计算了4种制样方法的最小探测活度

分析了4种制样方法的适用范围。

Abstract

Background:

There are four common methods to prepare radioactive aerosol samples for the purpose of gamma-spectroscopy involving an HPGe detector:ashing method

compressing method

holing method

and folding method. However

their counting characteristics have never been studied and compared.

Purpose:

This study aims to provide a comprehensive evaluation of these four sample preparation methods.

Methods:

An HPGe gamma spectrometer was used in the study to evaluate and confirm the reliability of these four radioactive aerosol sample preparation methods. Monte Carlo simulations were used to calculate the gamma-spectroscopic counting efficiency.

Results:

The four preparation methods were found to be generally reliable

with assessed activity diff

ering less than 5%. The ashing method was found to yield the highest counting efficiency

followed by compressing method

holing method

and folding method. For the 260mm

#215;210 mm and 570mm

#215;470 mm sized filter

the variation range of gamma detection efficiency was found to be 55% and 120%.

Conclusion:

The analyses of these sample preparation methods provide useful suggestions on the suitability and conditions

thus offering a useful reference on how to choose

prepare and count radioactive aerosols samples.

关键词

Keywords

references

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