OBSERVATION OF TWO-BODY INTERFERENCE EFFECT OF FIELD-EMISSION ELECTRONS AS FERIMIONS BY THE COINDIDENCE COUNTING METHOD

这项研究的目的是从实验上证实由于电子的费米子性质而产生的强度干涉效应。除了一个稳定的场致发射源外，我们还需要一个非常精确的符合计数系统。我们开发了一种特殊的符合计数系统，使得在高计数率条件下检测符合计数中的微小差异成为可能。我们的系统是一个带有单通道分析器(SCA)的普通时间幅度转换器(TAC)的模型，其中通过将停止脉冲的延迟时间改变为TAC，对不同的时间窗使用相同的SCA窗。对于重合和不重合事件，时间窗的不均匀性小于1/10,000。这一程度的一致性正好满足我们的目的，减少剩余的不一致性的努力正在继续。

The purpose of the research is to confirm experimentally the intensity interference effect of electrons due to their fermionic nature. Besides a stable field-emission source, a very precide coincidence counting system is required.We have developed a special concidence counting system which makes it possible to detect very small defference in coincidence count under high count rate conditions. Our system is a modefication of an ordinary time-to-amplitude converter (TAC) with a single-channel-analyzer (SCA), where the same SCA window is used for different time windows by changing the delay-time of stop pulse to the TAC.Non-uniformity of time windows for coincident and for off-coincident events is less than 1/10,000. This level of unifromity is just enough for our purpose and the effort to reduce the remaining non-uniformity is under continuation.