分析 X射线光电效应的特点 ,讨论俄歇电子和二次发射电子的产生机理。从“自由原子”模型出发 ,在理论上探讨 X射线光电发射的原理 ,建立 X射线光电发射的初步理论模型 ,讨论影响 X射线光电发射量子产额的几个特性参数 ,并对两个国际上常用的绝缘材料进行了计算 ,在此基础上提出了具有较高量子产额的全新硬 X射线光电阴极模型 Analyze the characteristics of X-ray photoelectron effect and discuss the generation mechanism of Auger electron and secondary emission electron. Based on the “free atom” model, the principle of X-ray photoemission is theoretically discussed and a preliminary theoretical model of X-ray photoemission is established. Several characteristic parameters affecting the quantum yield of X-ray photoemission are discussed. Commonly used insulating materials were calculated, on this basis, a new high-yield quantum hard X-ray photocathode model