Theoretical study of the phenomenon that right is higher than left in full-energy peak of the γ spectrum

Wenbiao LIU; Wei CHEN; Zining TIAN; Xuemei WANG; Chuanying SU; Tiancheng FENG

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

您当前的位置：

首页 >

文章列表页 >

Theoretical study of the phenomenon that right is higher than left in full-energy peak of the γ spectrum

NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH | 更新时间：2021-05-19

- Theoretical study of the phenomenon that right is higher than left in full-energy peak of the γ spectrum
- NUCLEAR TECHNIQUES Vol. 41, Issue 1, Article number: 010501(2018)
- 作者机构：
  
  西北核技术研究所西安 710024
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China
- DOI：10.11889/j.0253-3219.2018.hjs.41.010501
  CLC： TL81
- Received：07 August 2017，
  
  Revised：24 October 2017，
  
  Published：10 January 2018
- 稿件说明：
移动端阅览
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：

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 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Design and verification of small intelligent programmable SiPM power supply

Recognition for γ-ray sources by using NaI(Tl) spectrum

Related Author

HOU Huiliang

HUANG Yuefeng

CHENG Maosong

DAI Zhimin

YUAN Yonggang WEI Xiye LEI Jiarong ZHANG Shaohua

魏熙晔

雷家荣

张少华

Related Institution

Shanghai Institute of Applied Physics, Chinese Academy of Sciences

University of Chinese Academy of Sciences

China Academy of Engineering Physic,Institute of Nuclear Physics and Chemistry

AI问答

Address：2019 Jialuo Road, Jiading, Shanghai, China Postal code：201800
Tel：021-39194977 Email：LHB@sinap.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 沪ICP备05005479号-1 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
Total Visits：880473

⁰