Improvement of the hydrogenic model to give more accurate values of K-shell ionization cross sections

被引：7

作者：

Egerton, RF

机构：

[1] Physics Department, University of Alberta, Edmonton

来源：

ULTRAMICROSCOPY | 1996年 / 63卷 / 01期

关键词：

electron energy-loss spectroscopy (EELS); inelastic electron scattering theory; energy-filtered imaging and diffraction;

D O I：

10.1016/0304-3991(96)00034-4

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

The hydrogenic (Coulomb-wavefunction) model is shown to yield K-shell ionization cross sections which are within a few percent of those given by Hartree-Slater calculations, provided an inner-shell screening constant of approximate to 0.6 is adopted rather than the customary value (approximate to 0.3). This modification could result in more accurate quantification of very light elements (e.g. Li, Be, B) by electron energy-loss spectroscopy in a transmission electron microscope.

引用

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页码：11 / 13

页数：3

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