论文标题
从金属发射的二级电子发射的不变嵌入方法
Invariant embedding approach to secondary electron emission from metals
论文作者
论文摘要
基于反向散射函数的不变嵌入原理，我们计算了非常低的电子冲击能量金属表面的电子发射产率。 Solving the embedding equation within a quasi-isotropic approximation and using the effective mass model for the solid, experimental data are fairly well reproduced provided (i) incoherent scattering on ion cores is allowed to contribute to the scattering cascades inside the solid and (ii) the transmission through the surface potential takes into account Bragg gaps due to coherent scattering on crystal planes parallel to the surface as well as randomization of the electron's lateral由于表面缺陷上的弹性散射而引起的动量。我们的结果表明，为了使次级电子从金属中取出，由于样品的结晶度，不论样品的结晶度不管，因此必须通过非弹性电子 - 电子散射引起的巨大能量损失。
Based on an invariant embedding principle for the backscattering function we calculate the electron emission yield for metal surfaces at very low electron impact energies. Solving the embedding equation within a quasi-isotropic approximation and using the effective mass model for the solid, experimental data are fairly well reproduced provided (i) incoherent scattering on ion cores is allowed to contribute to the scattering cascades inside the solid and (ii) the transmission through the surface potential takes into account Bragg gaps due to coherent scattering on crystal planes parallel to the surface as well as randomization of the electron's lateral momentum due to elastic scattering on surface defects. Our results suggest that in order to get secondary electrons out of metals, the large energy loss due to inelastic electron-electron scattering has to be compensated for by incoherent elastic electron-ion core scattering, irrespective of the crystallinity of the sample.
