In this paper a parallel-plate avalanche counter for measuring Mossbauer emission-spectrum is described, the properties and the characteristics of the detector are discussed in detail.
本文介绍了用于测量穆斯堡尔发射谱的一种探测器——雪崩计数器，详细讨论了它的性能和特点。
The data acquisition circuit is composed of chip 89C52 and 8254. External measuring signal at interrupt mode triggers 89c52 to read number in 8254 counter.
由89c52和8254组成数据处理电路。 外部测量信号以外部中断方式触发89c52读取8254计数。
A model for measuring aerosol mass concentration by an optical particle counter is presented using the conception of the average mass.
基于平均质量的概念，提出了粒子计数器测量悬浮颗粒物质量浓度的计算模型。
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