采用可调谐染料倍频激光器照射固体表面,产生初始光电子,用配有时间符合电路的多通道分析器测量在正比计数器内初始电子引起的脉冲高度谱,改变光强获得了简单指数衰减的单电子脉冲谱,实现了固体表面单个光电子的检测。

Primary photoelectrons were produced on a solid surface by radiation of a tunable double-frequency dye laser. Pulse-height spectra of the primary photoelectrons in the proportional counter are measured on a multichannel analyzer. A simple exponential-decay pulse-height spectra of single photoelectron was obtained when the laser intensity was made very low. In this way single photoelectron on solid surface was detected.