基于L-M算法的快中子爆炸物检测方法研究

李江峰; 苏明; 熊忠华; 高凡

doi:10.11889/j.0253-3219.2018.hjs.41.080405

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基于L-M算法的快中子爆炸物检测方法研究

核电子学与仪器 | 更新时间：2021-05-19

- 基于L-M算法的快中子爆炸物检测方法研究
- L-M algorithm based explosive detection method by using the fast neutron
- 核技术 2018年41卷第8期文章编号：080405
- 作者机构：
  
  1.中国工程物理研究院表面物理与化学重点实验室江油 621907
  2.中国工程物理研究院材料研究所绵阳 621700
- 作者简介：
  
  [ "李江峰, 男, 1993年出生, 2015年毕业于中国科学技术大学, 现为硕士研究生, 辐射防护与环境保护专业", "LI Jiangfeng, male, born in 1993, graduated from University of Science and Technology of China in 2015, master student, focusing on radiation protection and environmental protection" ]
  熊忠华, E-mail:xzh_work@163.com XIONG Zhonghua, E-mail:xzh_work@163.com
- 基金信息：
- DOI：10.11889/j.0253-3219.2018.hjs.41.080405
  中图分类号： TL99
- 收稿日期：2017-11-24，
  
  修回日期：2018-05-11，
  
  纸质出版日期：2018-08
- 稿件说明：
移动端阅览
李江峰, 苏明, 熊忠华, 等. 基于L-M算法的快中子爆炸物检测方法研究[J]. 核技术, 2018,41(8):080405

Jiangfeng LI, Ming SU, Zhonghua XIONG, et al. L-M algorithm based explosive detection method by using the fast neutron[J]. Nuclear techniques, 2018, 41(8): 080405
李江峰, 苏明, 熊忠华, 等. 基于L-M算法的快中子爆炸物检测方法研究[J]. 核技术, 2018,41(8):080405 DOI： 10.11889/j.0253-3219.2018.hjs.41.080405.

Jiangfeng LI, Ming SU, Zhonghua XIONG, et al. L-M algorithm based explosive detection method by using the fast neutron[J]. Nuclear techniques, 2018, 41(8): 080405 DOI： 10.11889/j.0253-3219.2018.hjs.41.080405.

摘要

比起传统的X射线探测方法，快中子对爆炸物的检测更加准确，因而备受各国研究者的重视。利用中子源的快中子共振连续谱，准确计算待测物体的核素比例以达到检测爆炸物的目的。采用蒙特卡罗程序（Monte Carlo N-Particle code，MCNP）结合中子飞行时间（Time of Flight，TOF）方法模拟了4种爆炸物的中子共振谱，通过伴随γ粒子法测量

252

Cf源TOF谱，并运用L-M（Levenberg-Marquardt）算法对各核素的相对比例进行拟合计算。考虑时间分辨、中子飞行距离、待测物体厚度以及统计涨落对计算结果的影响，提出了更准确的TOF谱测量方法。研究结果表明，在能量分辨率较好的条件下，L-M拟合算法能较为准确地计算爆炸物的核素比例，最大误差不超过10%；能量分辨变差，物体厚度增大都会造成计算误差增大；统计涨落的影响使得该方法对于中子计数有一定的要求，总计数达到10

条件下的误差在可接受范围内。通过拟合快中子共振连续谱的方式能够获得物质的精确的核素比例以实现爆炸物的检测，但是要想将这种方法应用到现场测量中还需要进一步的研究。

Abstract

Background

Compared with the traditional X ray detection method

use of fast neutron to detect explosives can get more accurate result which has attracted worldwide attention.

Purpose

This study aims to detect explosive by using the continuous fast neutron resonance spectrum of radioactive neutron source.

Methods

The Monte Carlo program Monte Carlo N-particle code (MCNP) was used to simulate the neutron spectrum of four kinds of explosives combining neutron time of flight method. The associated γ particle method can be used to measure the neutron time of flight (TOF) spectrum of

252

Cf in practice

and levenberg-marquardt (L-M) fitting method was applicable to accurately calculate relative proportions of each nuclide. Based on the TOF methods of neutron energy spectrum measuring

the influence on the calculation results of time resolution

neutron flight distance

the thickness of the explosives and the statistical fluctuation has been taken into account for the measurement accuracy.

Results

The results show that L-M method can accurately calculate explosive nuclide ratio with high energy resolution

the maximum error was less than 10%. The energy resolution and thickness of the explosives increase the calculation error whilst the influence of statistical fluctuation can be eliminated by more than 10

neutron counting

Conclusions

The exact nuclide ratio of the material can be obtained by fitting the fast neutron resonance continuous spectrum to realize the detection of the explosives. However

further research is needed to apply this method to the on-site measurement.

关键词

Keywords

references

王海东 , 李元景 , 杨祎罡 , . 利用脉冲快热中子分析方法和神经网络识别爆炸物 . 核电子学与探测技术 , 2005 . 25 ( 4 ): 384 - 387 . DOI: 10.3969/j.issn.0258-0934.2005.04.011 http://doi.org/10.3969/j.issn.0258-0934.2005.04.011 .

Haidong WANG , Yuanjing LI , Yigang YANG , . Identification of explosives by pulse fast thermal neutron analysis and neural network . Nuclear Electronics & Detection Technology , 2005 . 25 ( 4 ): 384 - 387 . DOI: 10.3969/j.issn.0258-0934.2005.04.011 http://doi.org/10.3969/j.issn.0258-0934.2005.04.011 .

郝昕 , Stevanato L , Fabris D , . 利用中子源 252 Cf的材料鉴别技术 , 中国原子能科学研究院年报(2009) , 2010 . 176 - 177 .

Xin HAO , L Stevanato , D Fabris , . Material identification technology using neutron source 252 Cf , China Institute of Atomic Energy Annual Report (2009) , 2010 . 176 - 177 .

Chichester D L, Johnson J T, Seabury E H. High-resolution fast-neutron spectrometry for arms control and treaty verification[C]. 53rd Institute of Nuclear Materials Management Meeting, Orlando, USA, 2012.

徐四大 , 齐卉荃 . 检查隐藏爆炸物的快中子分析方法 . 物理 , 1996 . 25 ( 2 ): 92 - 95 .

Sida XU , Huiquan QI . Fast neutron analysis method for detecting hidden explosives . Physics , 1996 . 25 ( 2 ): 92 - 95 .

A S Tremsin , J B Mcphate , J V Vallerga , . High resolution neutron resonance absorption imaging at a pulsed neutron beamline . IEEE Transactions on Nuclear Science , 2013 . 59 ( 6 ): 3272 - 3277 . DOI: 10.1109/TNS.2012.2215627 http://doi.org/10.1109/TNS.2012.2215627 .

G Chen , R C Lanza . Fast neutron resonance radiography for elemental imaging:theory and applications . IEEE Transactions on Nuclear Science , 2002 . 49 ( 4 ): 1919 - 1924 . DOI: 10.1109/NSSMIC.2001.1009729 http://doi.org/10.1109/NSSMIC.2001.1009729 .

邹宇斌, 唐国有, 胥建国, 等. 快中子共振成像实验研究[C]. 北京核学会核技术应用学术交流会, 2008: 17-20.

ZOU Yubin, TANG Guoyou, XU Jianguo, et al. Experimental study of fast neutron resonance imaging[C]. Academic Exchange Conference on nuclear technology applications of the Beijing Nuclear Society. 2008: 17-20.

T Kamiyama , H Sato , N Miyamoto , . Energy sliced neutron tomography using neutron resonance absorption spectrometer . Nuclear Instruments and Methods in Physics Research Section A , 2009 . 600 ( 1 ): 107 - 110 . DOI: 10.1016/j.nima.2008.11.053 http://doi.org/10.1016/j.nima.2008.11.053 .

胡春明 , 郑洲 , 兰晓华 , . 中子共振谱在爆炸危险品精确探测中的应用 . 核电子学与探测技术 , 2009 . 29 ( 6 ): 1418 - 1420 . DOI: 10.3969/j.issn.0258-0934.2009.06.044 http://doi.org/10.3969/j.issn.0258-0934.2009.06.044 .

Chunming HU , Zhou ZHENG , Xiaohua LAN , . Application of neutron resonance spectroscopy for explosive material accuracy detection . Nuclear Electronics & Detection Technology , 2009 . 29 ( 6 ): 1418 - 1420 . DOI: 10.3969/j.issn.0258-0934.2009.06.044 http://doi.org/10.3969/j.issn.0258-0934.2009.06.044 .

Lawrence C C. Neutron spectrum unfolding with organic scintillators for arms-control verification[ED/OL]. https://deepblue.lib.umich.edu/handle/2027.42/110424 https://deepblue.lib.umich.edu/handle/2027.42/110424 , 2018-06-22.

任勇 , 魏彪 , 米德伶 , . 一种裂变中子源的中子、γ射线飞行时间谱测量新方法 . 强激光与粒子束 , 2009 . 21 ( 11 ): 1719 - 1723 . http://www.cqvip.com/QK/93571X/200911/32008440.html .

Yong REN , Biao WEI , Deling MI , . TOF spectrum measurement of 252 Cf source fission neutron and gamma ray . High Power Laser and Particle Beams , 2009 . 21 ( 11 ): 1719 - 1723 . http://www.cqvip.com/QK/93571X/200911/32008440.html .

K C Bledsoe , J A Favorite , J P Lefebvre , . Application of the differential evolution adaptive metropolis (DREAM) method for uncertainty quantification in inverse transport problems . Transactions of the American Nuclear Society , 2014 . 111 ( 1 ): 743 - 746 .

Bledsoe K C, Favorite J A. A hybrid differential evolution/Levenberg-Marquardt method for solving inverse transport problems[ED/OL]. https://inis.iaea.org/search/search.aspx?orig_q=RN:42102006 https://inis.iaea.org/search/search.aspx?orig_q=RN:42102006 , 2018-06-22.

Note L. Methods for Non-Linear Least Squares Problems[ED/OL]. Http://orbit.dtu.dk/files/2721358/imm3215.pdf Http://orbit.dtu.dk/files/2721358/imm3215.pdf , 2018-06-22.

A J Nelson , C L Ruiz , G W Cooper , . A novel method for modeling the neutron time of flight detector response in current mode to inertial confinement fusion experiments (invited) . Review of Scientific Instruments , 2012 . 83 ( 10 ): 10 - D915 . DOI: 10.1063/1.4742140 http://doi.org/10.1063/1.4742140 .

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