基于标记中子方法检测墙体爆炸物扣除本底方法
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摘要
利用电磁等技术确定墙体内可疑区域,采用标记中子方法检测可疑区域是否含有爆炸物,是快速、准确、可靠的技术手段.为了降低高密度墙体的影响,更准确判断墙体内是否存在爆炸物,分别采用全能峰面积(TPA)法,科沃尔(Covell)峰面积法,沃森(Wasson)峰面积法对2种元素C、O的特征峰进行本底扣除.采用扣除本底后的C、O特征峰计数比(C/O)值来确定墙体内是否存在爆炸物,与不扣除本底计数时的C/O值相比,其适用性得到较大提高.
It is a quick,accurate and reliable way to use tagged neutron technique to detect explosives embedded in a wall when a suspicious zone is located by a technique such as electro-magnetism.To decrease the impact of high-density wall on the spectra and to identify more accurately whether there are explosives in the wall,peak area method of TPA,Covell and Wasson to subtract the background were adopted,respectively.Compared with the results of the ratio of peak area of carbon to peak area of oxygen(C/O),the identification results had been greatly improved by adopting the C/O with background subtraction.
It is a quick,accurate and reliable way to use tagged neutron technique to detect explosives embedded in a wall when a suspicious zone is located by a technique such as electro-magnetism.To decrease the impact of high-density wall on the spectra and to identify more accurately whether there are explosives in the wall,peak area method of TPA,Covell and Wasson to subtract the background were adopted,respectively.Compared with the results of the ratio of peak area of carbon to peak area of oxygen(C/O),the identification results had been greatly improved by adopting the C/O with background subtraction.
引文
[1]龙斌,冯天成,苏川英,等.一种γ能谱散射本底的自适应扣除方法[J].核电子学与探测技术,2013(10):1-2.
[2]杨继增,景士伟,苏鸿彦,等.爆炸物检测实验系统研究[J].物理实验,2008,28(9):1-2.
[3]景士伟,郭勇,郑玉来,等.标记中子法检测包裹内爆炸物[J].核电子学与探测技术,2015,35(7):721-725.
[4]郭海萍,郑普,安力,等.爆炸物检测中典型样品的瞬发γ谱测量[J].强激光与粒子束,2013,25(9):2429-2432.
[5]徐四大,朱维彬.检测爆炸物和毒品的伴随粒子成像方法[J].原子能科学技术,1998,32(6):482-486.
[6]安力,何铁,郭海萍,等.伴随粒子法瞬发γ能谱测量技术研究[J].原子能科学技术,2010,44(S1):15-18.
[7]何铁,陈渊,安力,等.α粒子散射对爆炸物检测时间分辨的影响[J].强激光与粒子束,2010,22(10):2437-2440.
[8]Donzella A,Bodini I,Zenoni A,et al.Experimental validation of MCNP simulations for the EURITRACK Tagged Neutron Inspection System[J].Nuclear Instruments and Methods in Physics Research,2007,261:291-294.
[9]杨祎罡,李元景,王宏渊,等.基于14 MeVμs脉冲中子发生器与NaI(Tl)和BGO闪烁探测器的爆炸物检测系统的研制[J].同位素,2005,18(12):34-38.
[10]徐四大.伴随粒子成像及其应用[J].青岛大学学报,1997,10(2):60-61.
[11]郑玉来,王强,杨璐,等.基于快中子伴随α粒子方法的爆炸物检测技术的蒙特卡罗方法模拟[J].核电子学与探测技术,2013,33(10):1175-1178.
[12]侯晶晶,沈星,朱鹏飞,等.利用标记中子检测墙体内爆炸物[J].物理实验,2017,37(10):10-13.
[13]张林艳,戴挺,周怡君.能量色散X射线荧光光谱背景扣除方法的探讨[J].分析试验室,2009(12);1-2.
[14]庞巨丰.Wasson-Sterlinski峰面积计算公式的简化[J].原子能科学技术,1983(1):29-31.
[15]王里玉.Ge(Li)γ谱本底的直接扣除法[J].原子能科学技术,1986(4):1-2.
[16]杜鑫.多道γ射线能谱数据本底扣除方法研究及软件开发[D].北京:中国地质大学,2009:1-2.
[2]杨继增,景士伟,苏鸿彦,等.爆炸物检测实验系统研究[J].物理实验,2008,28(9):1-2.
[3]景士伟,郭勇,郑玉来,等.标记中子法检测包裹内爆炸物[J].核电子学与探测技术,2015,35(7):721-725.
[4]郭海萍,郑普,安力,等.爆炸物检测中典型样品的瞬发γ谱测量[J].强激光与粒子束,2013,25(9):2429-2432.
[5]徐四大,朱维彬.检测爆炸物和毒品的伴随粒子成像方法[J].原子能科学技术,1998,32(6):482-486.
[6]安力,何铁,郭海萍,等.伴随粒子法瞬发γ能谱测量技术研究[J].原子能科学技术,2010,44(S1):15-18.
[7]何铁,陈渊,安力,等.α粒子散射对爆炸物检测时间分辨的影响[J].强激光与粒子束,2010,22(10):2437-2440.
[8]Donzella A,Bodini I,Zenoni A,et al.Experimental validation of MCNP simulations for the EURITRACK Tagged Neutron Inspection System[J].Nuclear Instruments and Methods in Physics Research,2007,261:291-294.
[9]杨祎罡,李元景,王宏渊,等.基于14 MeVμs脉冲中子发生器与NaI(Tl)和BGO闪烁探测器的爆炸物检测系统的研制[J].同位素,2005,18(12):34-38.
[10]徐四大.伴随粒子成像及其应用[J].青岛大学学报,1997,10(2):60-61.
[11]郑玉来,王强,杨璐,等.基于快中子伴随α粒子方法的爆炸物检测技术的蒙特卡罗方法模拟[J].核电子学与探测技术,2013,33(10):1175-1178.
[12]侯晶晶,沈星,朱鹏飞,等.利用标记中子检测墙体内爆炸物[J].物理实验,2017,37(10):10-13.
[13]张林艳,戴挺,周怡君.能量色散X射线荧光光谱背景扣除方法的探讨[J].分析试验室,2009(12);1-2.
[14]庞巨丰.Wasson-Sterlinski峰面积计算公式的简化[J].原子能科学技术,1983(1):29-31.
[15]王里玉.Ge(Li)γ谱本底的直接扣除法[J].原子能科学技术,1986(4):1-2.
[16]杜鑫.多道γ射线能谱数据本底扣除方法研究及软件开发[D].北京:中国地质大学,2009:1-2.