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本文对光电反馈电荷灵敏前置放大器做了比较详细的描述,给出目前得到的前置放大器的分辨率FWHM(半宽度)在主放大器成形时间常数τ为10微秒时的结果为172电子伏。采用性能较好的Si(Li)探测器。整个谱仪对~(55)Fe源的5.9千电子伏MnK_αX射线的分辨率FWHM为324电子伏(主放大器成形时间常数τ为3微秒)。最后对上述结果进行了讨论。
In this paper, a more detailed description of the photoelectric feedback charge-sensitive preamplifier is given. The resolution of the currently obtained preamplifier FWHM (half-width) is given as 172 μA when the main amplifier shaping time constant τ is 10 μs . Using better performance Si (Li) detector. The resolution of 5.9 K eV MnK_α X-ray of ~ (55) Fe source was FWHM of 324 electron volts (the main amplifier shaping time constant τ was 3 microseconds) for the entire spectrometer. Finally, the above results are discussed.