【摘要】 提出了一种测量金阴极的紫外光谱响应特性的方法.利用微通道板(microchannel plate,简称MCP)对电子的高增益特性,通过直接测量金阴极MCP探测器输出电流表征金阴极的紫外光响应.测量金阴极MCP探测器在200—340nm波段的光谱响应,得到金阴极的谱响应特性:金作为逸出功较大的金属,也具有碱金属才有的选择性光电效应.其选择峰值位于5.72eV处,通过理论验证了该峰值的位置.更多还原

【Abstract】 A method for measuring the ultraviolet spectrum characteristic of Au photocathode has been put forward.Making use of the high gain characteristic of microchannel plate(MCP) and ultraviolet light,the frequency response of Au cathode has been studied by measuring the output current of Au coated MCP detector directly.Through measuring the response current of Au coated MCP detector between 200—340 nm,the selective photoemission of Au has been found,which had been found only for alkali metals.And the selective peak is at 5.72 eV,which can be explained by quantum mechanics theory.更多还原