极大似然法反演γ特征峰位的能力研究

陈伟; 苏川英; 冯天成; 刘文彪; 田自宁

doi:10.11889/j.0253-3219.2018.hjs.41.120502

您当前的位置：

首页 >

文章列表页 >

极大似然法反演γ特征峰位的能力研究

核物理、交叉学科研究 | 更新时间：2021-05-19

- 极大似然法反演γ特征峰位的能力研究
- Study on the ability of maximum likelihood method to retrieve the positionof γ characteristic peaks
- 核技术 2018年41卷第12期文章编号：120502
- 作者机构：
  
  西北核技术研究所西安 710024
- 作者简介：
  
  [ "陈伟, 男, 1982年出生, 2015年于四川大学获硕士学位, 主要从事核技术及应用研究", "CHEN Wei, male, born in 1982, graduated from Sichuan University with a master's degree in 2015, focusing on nuclear technology and application" ]
- 基金信息：
  
  国家自然科学基金(11405134)
- DOI：10.11889/j.0253-3219.2018.hjs.41.120502
  中图分类号： TL81
- 收稿日期：2018-04-04，
  
  修回日期：2018-07-09，
  
  纸质出版日期：2018-12-10
- 稿件说明：
移动端阅览
陈伟, 苏川英, 冯天成, 等. 极大似然法反演γ特征峰位的能力研究[J]. 核技术, 2018,41(12):120502

Wei CHEN, Chuanying SU, Tiancheng FENG, et al. Study on the ability of maximum likelihood method to retrieve the positionof γ characteristic peaks[J]. Nuclear techniques, 2018, 41(12): 120502
陈伟, 苏川英, 冯天成, 等. 极大似然法反演γ特征峰位的能力研究[J]. 核技术, 2018,41(12):120502 DOI： 10.11889/j.0253-3219.2018.hjs.41.120502.

Wei CHEN, Chuanying SU, Tiancheng FENG, et al. Study on the ability of maximum likelihood method to retrieve the positionof γ characteristic peaks[J]. Nuclear techniques, 2018, 41(12): 120502 DOI： 10.11889/j.0253-3219.2018.hjs.41.120502.

摘要

极大似然法反演γ能谱可有效提高γ能谱能量分辨率，为观察该方法反演γ特征峰位的能力，使用蒙特卡罗模拟程序MCNP（Monte Carlo N Particle Transport Code）计算了一台10.16cm×10.16cm×40.64cm NaI（Tl）探测器的能量响应矩阵，采用极大似然法和该能量响应矩阵对包含10种不同能量特征峰的MCNP模拟能谱、铅屏蔽室和实验室自然环境中测得的

152

Eu点源的γ能谱进行反演。结果显示：对模拟的γ能谱，反演后特征峰中心道址相对参考值最大偏差为1道；对铅屏蔽室中的

152

Eu γ能谱，反演后特征峰中心道址与实测值偏差小于2道；对实验室自然环境中

152

Eu γ能谱，反演后特征峰中心道址与实测值偏差小于4道。

Abstract

Background

The inversion of gamma spectrum by maximum likelihood method can effectively improve the energy resolution of gamma spectrum.

Purpose

This study aims to observe the ability of maximum likelihood method to retrieve the central channel of γ characteristic peaks.

Methods

Monte Carlo simulation program MCNP (Monte Carlo N Particle Transport Code) was used to calculate the energy response matrix of a 10.16 cm×10.16 cm×40.64 cm NaI(Tl) detector. Energy response matrix

the simulated spectra contained 10 different peaks

and the

152

Eu γ spectra obtained by the experiment were retrieved.

Results & Conclusions

The results showed that the maximum deviation of the peak center channel between the retrieved spectra and the simulated spectra was 1 channel

deviation between the retrieved spectrum and

152

Eu γ spectrum measured in the lead shielding room was less than 2 channels

the deviation between the retrieved spectrum and

152

Eu γ spectrum measured in the laboratory's natural environment was less than 4 channels.

关键词

Keywords

references

L J Meng , D Ramsden . An inter-comparison of three spectral-deconvolution algorithms for gamma-ray spectroscopy . IEEE Transactions on Nuclear Science , 2000 . 47 ( 4 ): 1329 - 1336 . DOI: 10.1109/23.872973 http://doi.org/10.1109/23.872973 .

张庆贤.航空γ能谱特征和仪器谱解析方法研究[D].成都: 成都理工大学, 2010: 71-76. http://cdmd.cnki.com.cn/Article/CDMD-10616-2010218361.htm

ZHANG Qingxian. The character of airborne gamma-ray spectrometry and the method for spectrum analysis[D]. Chengdu: Chengdu University of Technology, 2010: 71-76.

M S Rahman , G Cho , B S Kang . Deconvolution of gamma-ray spectra obtained with NaI(Tl) detector in a water tank . Radiation Protection Dosimetry , 2009 . 135 ( 3 ): 203 - 210 . DOI: 10.1093/rpd/ncp102 http://doi.org/10.1093/rpd/ncp102 .

L A Shepp , Y Vardi . Maximum likelihood reconstruction for emission tomography . IEEE Transaction on Medical Imaging , 1982 . MI-1 ( 1 ): 113 - 122 . DOI: 10.1109/TMI.1982.4307558 http://doi.org/10.1109/TMI.1982.4307558 .

Y Vardi , L A Shepp , L Kaufman . A statistical model for positron emission tomography . Journal of the American Statistical Association , 1985 . 80 ( 389 ): 8 - 20 . DOI: 10.2307/2288030 http://doi.org/10.2307/2288030 .

J D Lowrey , S R F Biegalski . Comparison of least-squares vs. maximum likelihood estimation for standard spectrum technique of β-γ coincidence spectrum analysis . Nuclear Instruments and Methods in Physics Research B , 2012 . 270 116 - 119 . DOI: 10.1016/j.nimb.2011.09.005 http://doi.org/10.1016/j.nimb.2011.09.005 .

R R Kiziah , J R Lowell . Experimental response function spanning the gamma-ray energy range of 123.6 keV to 11.67 MeV and response matrix generation for bismuth germanate scintillation detectors . Nuclear Instruments and Methods in Physics Research Section A , 1991 . 305 129 - 142 . DOI: 10.1016/0168-9002(91)90526-V http://doi.org/10.1016/0168-9002(91)90526-V .

X-5 Monte Carlo Team. MCNP-A general Monte Carlo n-particle transport code[M]. Version 5 Volume Ⅱ: User's Guide, 2003.

C G Ryan , E Clayton , W L GrIffin , . SNIP, a statistics-sensitive background treatment for the quantitative analysis of pixe spectra in geoscience applications . Nuclear Instruments and Methods in Physics Research B , 1988 . 34 396 - 402 . DOI: 10.1016/0168-583X(88)90063-8 http://doi.org/10.1016/0168-583X(88)90063-8 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

暂无数据