【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.更多还原

【Abstract】 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.更多还原