X射线光电发射材料

THEORETICAL DESCRIPTION OF X RAY PHOTOCATHODE MATERIAL

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

The character of X ray photoemission wis studied.The mechanism of photo Auger electrons and the secondary electron yield is discussed.From the“free atom”model of the absorbing medium,a detailed theoretical model of X ray photoemission is preesented.Some paraments of affecting the quantum yield are disscused.At last,a new photocathode material model for hard X ray is provided on the basis of this theory.