【作者】 刘宇哲； 陈炼； 梁福田； 李锋； 金革；

【Author】 LIU Yuzhe;CHEN Lian;LIANG Futian;LI Feng;JIN Ge;State Key Laboratory of Particle Detection and Electronics;Department of Modern Physics, University of Science and Technology of China;

【机构】 核探测与核电子学国家重点实验室； 中国科学技术大学近代物理系；

【摘要】 瞬发γ射线中子活化分析(简称PGNAA)技术利用中子和γ射线穿透能力极强的特点,可以实现对较大厚度物体的内部的全元素信息进行探测,是一种被广泛应用到工业物料成分分析中的检测技术。本文提出的高通过率、高信噪比电子学系统,利用先进的电子学技术,可以实现在PGNAA应用中,对移动中的工业物的料成分及含量进行实时、准确和快速的监测分析,达到单次测量的时间为120s,脉冲信号的平均计数率达到500kc/s的设计目标。更多还原

【Abstract】 The prompt γ-ray neutron activation analysis(referred PGNAA) technology is a use of the strong penetrating power of neutron and γ-ray, which can get the whole information of the elements inside a thick material. Therefore, the PGNAA technology has become the best choice to meet the needs of detecting the composition of industrial materials. This paper presents a data acquisition scheme for the physical targets of PGNAA, which has a high pass rate, high SNR and can analyze and process a large number of pulses which the detector outputs. This system is designed to rapidly analyze the composition and content of the industrial materials in real-time. Since we have to dynamically analyze the moving materials, the expected time for a measurement cannot exceed 120 s, The average counting rate is expected to reach more than 500kc/s.更多还原