Anisotropy of attenuation revealed by angular intensity distribution of elastically backscattered electrons
- 作者：I. Morawski ; imorawski@ifd.uni.wroc.pl ; M. Nowicki
- 关键词：Electron attenuation ; Inelastic mean free path ; Electron scattering ; Copper ; Gold ; Platinum ; Crystalline structure
- 刊名：Journal of Electron Spectroscopy and Related Phenomena
- 出版年：2012
- 期刊代码：51_03682048
- 类别：ch
- 出版时间：April, 2012
- 卷：185
- 期：3-4
- 页码：90-96
- 文件大小：1292 K
摘要
The structure of the first few atomic layers of Cu(1 1 1), Pt(1 1 1), and Au(1 1 1) was reflected by the directional elastic peak electron spectroscopy (DEPES). Experimental stereographic projections were compared with the theoretical data obtained by using a multiple scattering (MS) approximation. Although the same angular distribution of the maxima was observed in recorded and computed data for all samples, the relative peak intensities were found to be significantly different. The observed discrepancies suggest the anisotropic damping of electron transport in crystalline samples with respect to the low index directions. Elastic scattering of electrons penetrating the sample along the close packed atomic rows leads to an additional defocusing effect of the primary beam.