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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Photoelectron transport in the surface region of solids: universal analytical formalism for quantitative applications of electron spectroscopies
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Photoelectron transport in the surface region of solids: universal analytical formalism for quantitative applications of electron spectroscopies

机译：固体表面区域中的光电子传输：电子光谱学定量应用的通用分析形式

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摘要

An advanced analytical theory describing electron transport in the surface region of solids may have accuracy comparable to Monte Carlo simulations of electron trajectories, however such an approach requires knowledge of a parameter called the single scattering albedo. This parameter is material dependent and can be calculated from the elastic mean free path and transport mean free path for signal electrons. An attempt is made to derive a simple expression that accurately describes the energy dependence of single scattering albedo in a wide energy range from 50 eV to 30 keV for 78 elemental solids. For these solids and the considered energy range, the mean percentage deviations between the reference values and values calculated from the fitted function were found to be generally well below 1%; the largest value of this deviation was equal to 0.86% (europium). Calculation of the single scattering albedo with high accuracy requires only five fitted coefficients for a given element. Recommendations are also given for calculations of this parameter for compounds. Different predictive formulas expressed in terms of the single scattering albedo are briefly discussed.
机译：描述电子在固体表面区域中传输的先进分析理论可能具有可与电子轨迹的蒙特卡洛模拟相媲美的精度，但是这种方法需要知道称为单散射反照率的参数。该参数取决于材料，可以根据信号电子的弹性平均自由程和传输平均自由程来计算。试图得出一个简单的表达式，该表达式可以精确描述单个散射反照率在78 e固体中从50 eV到30 keV的宽能量范围内的能量依赖性。对于这些固体和所考虑的能量范围，发现参考值和根据拟合函数计算的值之间的平均百分比偏差通常远低于1％。该偏差的最大值等于0.86％（eur）。高精度计算单个散射反照率只需要给定元素五个拟合系数。还提供了计算该化合物参数的建议。简要讨论了根据单个散射反照率表示的不同预测公式。

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