| 用积分法推导NEA光电阴极的量子产额 |
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| 引用本文： | 宗志园,常本康.用积分法推导NEA光电阴极的量子产额[J].光学学报,1999,19(9):1177-1182. |
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| 作者姓名： | 宗志园 常本康 |
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| 作者单位： | 南京理工大学电子工程与光电技术学院,南京,210094 |
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| 摘 要： | 以“三步发射模型”为基础， 采用积分的方法推导出反射式和透射式负电子亲和势（ Ｎ Ｅ Ａ）光电阴极的量子产额表达式， 其中反射式阴极的表达式和传统的求解扩散方程得出的表达式完全相同， 而根据透射式阴极的表达式绘出的量子产额理论曲线， 和求解扩散方程绘出的曲线基本重合， 与实验曲线也符合得很好。
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| 关 键 词： | 负电子亲和势光电阴极 量子产额 光电子 |
| 收稿时间： | 1998/3/3 |
Calculating the Quantum Yield of NEA Photocathode by Integral |
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| Zong Zhiyuan,Chang Benkang.Calculating the Quantum Yield of NEA Photocathode by Integral[J].Acta Optica Sinica,1999,19(9):1177-1182. |
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| Authors: | Zong Zhiyuan Chang Benkang |
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| Abstract: | A new way to calculate the quantum yield of negative electron affinity (NEA) photocathode is introduced. On the base of “three-step emission model”, the quantum yield of NEA photocathode is obtained by integral. The quantum yield formulas of reflection-mode and transmission-mode NEA photocathode are given. The formula of reflection-mode photocathode is the same with that derived from the diffusion equation. And, according to the formula of transmission-model NEA photocathode, thoretical quantum yield curve is drawn by computer, which is coincident with the curve drawn according to traditional formular and also identical with experimental curve. |
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| Keywords: | negative electron affinity photocathode quantum yield photoelectrons |
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