γ全能峰右高左低现象理论分析

刘文彪; 陈伟; 田自宁; 王雪梅; 苏川英; 冯天成

doi:10.11889/j.0253-3219.2018.hjs.41.010501

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γ全能峰右高左低现象理论分析

核物理、交叉学科研究 | 更新时间：2021-05-19

- γ全能峰右高左低现象理论分析
- Theoretical study of the phenomenon that right is higher than left in full-energy peak of the γ spectrum
- 核技术 2018年41卷第1期文章编号：010501
- 作者机构：
  
  西北核技术研究所西安 710024
- 作者简介：
  
  [ "刘文彪, 男, 1990年出生, 2015年于兰州大学获硕士学位, 研究领域为核技术及其应用", "LIU Wenbiao, male, born in 1990, graduated from Lanzhou University with a master's degree in 2015, focusing on nuclear techniques and application" ]
- 基金信息：
  
  国家自然科学基金(11405134)
- DOI：10.11889/j.0253-3219.2018.hjs.41.010501
  中图分类号： TL81
- 收稿日期：2017-08-07，
  
  修回日期：2017-10-24，
  
  纸质出版日期：2018-01-10
- 稿件说明：
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刘文彪, 陈伟, 田自宁, 等. γ全能峰右高左低现象理论分析[J]. 核技术, 2018,41(1):010501

Wenbiao LIU, Wei CHEN, Zining TIAN, et al. Theoretical study of the phenomenon that right is higher than left in full-energy peak of the γ spectrum[J]. Nuclear techniques, 2018, 41(1): 010501
刘文彪, 陈伟, 田自宁, 等. γ全能峰右高左低现象理论分析[J]. 核技术, 2018,41(1):010501 DOI： 10.11889/j.0253-3219.2018.hjs.41.010501.

Wenbiao LIU, Wei CHEN, Zining TIAN, et al. Theoretical study of the phenomenon that right is higher than left in full-energy peak of the γ spectrum[J]. Nuclear techniques, 2018, 41(1): 010501 DOI： 10.11889/j.0253-3219.2018.hjs.41.010501.

摘要

用HPGe γ谱仪对高活度放射性样品进行测量时，在能谱中出现了全能峰右侧明显高于左侧的现象，为准确定量分析γ放射性核素带来困难。通过理论分析，详细解释了该现象产生的原因，实验验证了理论分析结论是正确的。分析结果表明，全能峰右侧高于左侧的现象主要由偶然符合效应引起，并且总体上全能峰左右两侧高度的比值随死时间增大先增后减，当死时间小于等于1.0%时，全能峰左右两侧高度近似相等，当死时间位于1.0%-4.0%时，峰左右高度比值随死时间而增大，当死时间位于4.0%-56%时，峰左右高度比值随死时间增加而减小。并通过实验结果与LabSOCS计算结果对比，显示右高左低这种现象并不会对点源的能谱测量造成影响。

Abstract

Background

The phenomenon that right is higher than left in full-energy peak of the γ spectrum in the high active sample using HPGe gamma-ray spectrometry in laboratory

brings error into the gamma-radioactive nuclide analysis.

Purpose

This paper aims to explain the phenomenon to realize accurate quantitative analysis.

Methods

The theoretical formula of the right-to-left ratios was developed

and experiment was designed to prove it.

Results

The experiment indicates that the theoretical calculation is right. The research achievement shows that the phenomenon is caused by accidental coincidence.

Conclusion

The right-to-left ratios increase first

then decrease with the higher dead time. When the dead time is lower than 1.0%

the right is approximate equal to the left in full energy peak. With the dead time is higher than 1.0% and lower than 4.0%

the ratios increases with the dead time. As the dead time is higher than 4.0% and lower than 56%

the ratios decreases with the dead time. Comparing the experiment with LabSOCS

it indicated that the phenomenon has no influence on analysis of the point source.

关键词

Keywords

references

吴伦强 , 韦孟伏 , 张连平 , . γ能谱技术鉴定放射性核素的应用研究 . 核电子学与探测技术 , 2009 . 29 ( 5 ): 931 - 934 . http://doi.wanfangdata.com.cn/10.3969/j.issn.0258-0934.2009.05.001 .

Lunqiang WU , Mengfu WEI , Lianping ZHANG , . Application research of γ spectrometry on the authentication of radionuclide . Nuclear Electronics & Detection Technology , 2009 . 29 ( 5 ): 931 - 934 . http://doi.wanfangdata.com.cn/10.3969/j.issn.0258-0934.2009.05.001 .

伍怀龙 , 刘素萍 , 刘晓亚 , . γ能谱解谱技术研究 . 核技术 , 2005 . 28 ( 6 ): 430 - 434 . https://wuxizazhi.cnki.net/lunwen-1011235494.html .

Huailong WU , Suping LIU , Xiaoya LIU , . Investigation of gamma spectra analysis . Nuclear Techniques , 2005 . 28 ( 6 ): 430 - 434 . https://wuxizazhi.cnki.net/lunwen-1011235494.html .

冯天成 , 吴睿 , 苏川英 , . 就地γ能谱中天然核素峰谷比随砂土容重的变化 . 核电子学与探测技术 , 2013 . 33 ( 4 ): 417 - 424 . http://cpfd.cnki.com.cn/Article/CPFDTOTAL-HDZX201208005055.htm .

Tiancheng FENG , Rui WU , Chuanying SU , . PVR's variety with soil-bulk density in in-situ γ spectra of natural radionuclides . Nuclear Electronics & Detection Technology , 2013 . 33 ( 4 ): 417 - 424 . http://cpfd.cnki.com.cn/Article/CPFDTOTAL-HDZX201208005055.htm .

冯天成 , 贾明雁 , 冯元举 , . 就地γ谱仪峰谷比法测量 137 Cs深度分布 . 原子能科学技术 , 2011 . 45 ( 6 ): 722 - 729 . http://lprapp14.fao.org/XML_Output/2010/CN/CN0912.xml .

Tiancheng FENG , Mingyan JIA , Yuanju FENG , . Peak-to-valley ratio method to determine depth distribution of 137 Cs in soil by in-situ γ spectrometry . Atomic Energy Science and Technology , 2011 . 45 ( 6 ): 722 - 729 . http://lprapp14.fao.org/XML_Output/2010/CN/CN0912.xml .

李德 , 过雅南 . 随机信号偶然符合计数率公式的推导 . 核电子学与探测技术 , 2000 . 20 ( 1 ): 1 - 4 . http://www.doc88.com/p-74688088658.html .

De LI , Yanan GUO . Formula to compute the accidental coincidence rate for random signals . Nuclear Electronics & Detection Technology , 2000 . 20 ( 1 ): 1 - 4 . http://www.doc88.com/p-74688088658.html .

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