A prompt gamma-neutron activation analysis(PGNAA) system was developed to detect the iron content of iron ore concentrate. Because of the self-absorption effect of gamma-rays and neutrons, and the interference of chlo...A prompt gamma-neutron activation analysis(PGNAA) system was developed to detect the iron content of iron ore concentrate. Because of the self-absorption effect of gamma-rays and neutrons, and the interference of chlorine in the neutron field, the linear relationship between the iron analytical coefficient and total iron content was poor, increasing the error in the quantitative analysis. To solve this problem, gamma-ray self-absorption compensation and a neutron field correction algorithm were proposed, and the experimental results have been corrected using this algorithm. The results show that the linear relationship between the iron analytical coefficient and total iron content was considerably improved after the correction. The linear correlation coefficients reached 0.99 or more.展开更多
为实现中子感生瞬发伽马射线方法在线测量煤炭元素含量,采用C#编写了自动测量程序。采用File System Watcher监测谱文件的生成,利用StreamReader读取伽马能谱的数据,用五点二次平滑法平滑计数,利用11道计数和寻找峰位,通过线性回归方程...为实现中子感生瞬发伽马射线方法在线测量煤炭元素含量,采用C#编写了自动测量程序。采用File System Watcher监测谱文件的生成,利用StreamReader读取伽马能谱的数据,用五点二次平滑法平滑计数,利用11道计数和寻找峰位,通过线性回归方程计算碳、氢、氧的含量。自动测量程序不仅可以自动计算元素含量,还能自动控制中子探测器、多道脉冲分析器、伽马射线探测器和D-T中子发生器等硬件。现场测试结果表明,该程序自身问题引起的设备故障率几乎为零,每个伽马能谱的解析时间小于1 s,能满足煤炭元素含量在线测量的要求。展开更多
基金supported by the National Key Scientific Instrument and Equipment Development Projects(No.2012YQ240121)Liaoning science and technology project(No.2017220010)Changchun Science and Technology Bureau Local Company and College(University,Institution)Cooperation Projects(No.17DY023)
文摘A prompt gamma-neutron activation analysis(PGNAA) system was developed to detect the iron content of iron ore concentrate. Because of the self-absorption effect of gamma-rays and neutrons, and the interference of chlorine in the neutron field, the linear relationship between the iron analytical coefficient and total iron content was poor, increasing the error in the quantitative analysis. To solve this problem, gamma-ray self-absorption compensation and a neutron field correction algorithm were proposed, and the experimental results have been corrected using this algorithm. The results show that the linear relationship between the iron analytical coefficient and total iron content was considerably improved after the correction. The linear correlation coefficients reached 0.99 or more.
文摘为实现中子感生瞬发伽马射线方法在线测量煤炭元素含量,采用C#编写了自动测量程序。采用File System Watcher监测谱文件的生成,利用StreamReader读取伽马能谱的数据,用五点二次平滑法平滑计数,利用11道计数和寻找峰位,通过线性回归方程计算碳、氢、氧的含量。自动测量程序不仅可以自动计算元素含量,还能自动控制中子探测器、多道脉冲分析器、伽马射线探测器和D-T中子发生器等硬件。现场测试结果表明,该程序自身问题引起的设备故障率几乎为零,每个伽马能谱的解析时间小于1 s,能满足煤炭元素含量在线测量的要求。
