滤波-荧光法测量X光能谱的模拟计算

摘要

介绍了滤波-荧光法测量X光能谱的本底来源和降低本底的措施,分析了信号和噪声数值计算的近似条件,以"高能尾巴"为主要本底计算了7×106K和10×106K两个温度下Ca-K、V-Ti不同厚度组合的信噪比和理想状态下PIN探测器的输出电流.%It introduces the source of background and the ways to reduce the background when filter-fluo-rescence method is used to measure X-ray energy spectrum, and analyzes the approximate conditions of numberical calculation of signal and noise, regrading the "high-energy-tail" as the main background, Sig-nal-to-Noise Ratio of Ca-k, V-Ti of different thickness conbination and current output of PIN detector in erfect state are calculated in temperature 7×106K and 10×106K.