A remarkable systemic error in calibration methods of γ spectrometer used for determining activity of <sup>238</sup>U

SU Qiong1 DIAO Lijun2 LI Guiqun2 CHENG Jianping1 1

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A remarkable systemic error in calibration methods of γ spectrometer used for determining activity of ²³⁸U

更新时间：2021-03-12

- A remarkable systemic error in calibration methods of γ spectrometer used for determining activity of ²³⁸U
- NUCLEAR TECHNIQUES Issue 12, (2006)
- 作者机构：
  
  1. 清华大学工程物理系核技术研究所
  2. 中国原子能科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL817.2
- Published：01 December 2006
- 稿件说明：
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[1]苏琼,刁立军,李贵群,程建平.用于测定U-238活度的γ谱仪效率刻度方法中一个值得注意的误区[J].核技术,2006(12):941-953.

SU Qiong1 DIAO Lijun2 LI Guiqun2 CHENG Jianping1 1. A remarkable systemic error in calibration methods of γ spectrometer used for determining activity of ²³⁸U[J]. Nuclear techniques, 2006, (12): 941-953.
[1]苏琼,刁立军,李贵群,程建平.用于测定U-238活度的γ谱仪效率刻度方法中一个值得注意的误区[J].核技术,2006(12):941-953. DOI：

SU Qiong1 DIAO Lijun2 LI Guiqun2 CHENG Jianping1 1. A remarkable systemic error in calibration methods of γ spectrometer used for determining activity of ²³⁸U[J]. Nuclear techniques, 2006, (12): 941-953. DOI：

摘要

本文详实地揭示了在高分辨Geγ谱仪效率刻度方法及其样品分析应用中一个长期以来未为谱学工作者发觉和认识的误区。通过实验及物理数学推导方法

阐述了当选用92.6keV特征γ射线分析天然样品中U-238活度时

是外源性特征X射线干扰的存在及影响其变化的多因素不确定性导致了准确测定天然样品中U-238活度的困难

并导致分析结果中含有难于预测的系统误差

故而文中建议摒弃该方法。文中注意到本文报告的误区在既往某些工作中遗留的影响

建议运用相关数据时应十分谨慎

如果可能

应设法重新测定。

Abstract

A remarkable systemic error which was unknown in past long time has been indicated. The error appears in the calibration methods of determining activity of 238U is used with γ-spectrometer with high resolution. When the γ-ray of 92.6 keV as the characteristic radiation from 238U is used to determine the activity of 238U in natural environment samples

the disturbing radiation produced by external excitation (or called outer sourcing X-ray radiation) is the main problem. Because the X-ray intensity is changed with many indefinite factors

it is advised that the calibration methods should be put away. As the influence of the systemic errors has been left in some past research papers

the authors suggest that the data from those papers should be cited carefully and if possible the data ought to be re-determined.

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A remarkable systemic error in calibration methods of γ spectrometer used for determining activity of 238U

DOI：

摘要

Abstract

关键词

Keywords

references

A remarkable systemic error in calibration methods of γ spectrometer used for determining activity of ²³⁸U