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Extracting physically interpretable data from electron energy-loss spectra

机译:从电子能量损失谱中提取可物理解释的数据

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摘要

Principal component analysis is routinely applied to analyze data sets in electron energy-loss spectroscopy (EELS). We show how physically meaningful spectra can be obtained from the principal components using a knowledge of the scattering of the probe electron and the geometry of the experiment. This approach is illustrated by application to EELS data for the carbon K edge in graphite obtained using a conventional transmission electron microscope. The effect of scattering of the probe electron is accounted for, yielding spectra which are equivalent to experiments using linearly polarized X-rays. The approach is general and can also be applied to EELS in the context of scanning transmission electron microscopy.
机译:主成分分析通常用于分析电子能量损失谱(EELS)中的数据集。我们展示了如何利用探测电子的散射和实验的几何学知识,从主要成分中获得物理上有意义的光谱。通过将使用常规透射电子显微镜获得的石墨中碳K边缘应用于EELS数据,可以说明这种方法。考虑了探针电子散射的影响,产生了与使用线性偏振X射线进行的实验等效的光谱。该方法是通用的,并且也可以在扫描透射电子显微镜的背景下应用于EELS。

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