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本文详细地叙述了如何采用单板机接口电路来代替多道分析器。通过分析多道电路的工作过程,阐明了这个接口电路的关键部分是峰值保持电路,它直接影响该接口电路的分辨能力,为此,选用由集成元件组成的比较式峰值保持电路,通过反复的调试,获得了输入脉冲幅值得保持精度小于1％的工作稳定线性电路。此外,本文还对软件设计作了简单的介绍,并提供了流程图。最后,文章又叙述了用该接口电路测量~(137)C_r和~(60)C_o两种放射源的Υ能谱,并进行了重复试验,其结果基本一样,分辩率均小于10％。这一结果表明,该接口电路能做教学和科研工作。
This article describes in detail how to use single-board interface circuit instead of multi-channel analyzer. By analyzing the working process of multi-channel circuit, it is clarified that the key part of this interface circuit is the peak-hold circuit, which directly affects the resolving power of this interface circuit. To this end, we choose the comparative peak hold circuit composed of integrated components, Debugging, access to the input pulse amplitude to maintain the accuracy of less than 1% of the work of a stable linear circuit. In addition, this article also made a brief introduction to the software design and provided the flow chart. Finally, the article also describes the use of the interface circuit measurement of ~ (137) C_r and ~ (60) C_o two radioactive sources Y spectra, and repeated tests, the results are basically the same, the resolution is less than 10%. This result shows that the interface circuit can do teaching and research work.