首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Joint experimental and computational study of aluminum electron energy loss spectra
Authors:Lucia Calliari  Massimiliano Filippi
Institution:a ITC-irst, Via Sommarive 18, I-38050 Povo, Trento, Italy
b Dipartimento di Fisica dell’Università di Trento, Via Sommarive 18, I-38050 Povo, Trento, Italy
Abstract:Experimental reflection electron energy loss (REEL) spectra are measured from aluminum for primary energies ranging from 130 eV to 2 keV. A Monte Carlo simulation is shortly described and used to calculate the same spectra. The focus is on reproducing the variable weight of surface and bulk losses as the surface sensitivity of spectra changes by changing the primary electron energy. The intensity of surface losses in the simulations is modulated by the thickness of the region where surface excitations occur. Simulations based either on a constant or an energy-dependent thickness for this layer are considered. In both cases, simulated spectra reproduce the experimental trend as a function of energy, though the correct surface-to-bulk intensity ratio for each energy is either underestimated or overestimated.
Keywords:Aluminum  Reflection electron energy loss spectroscopy  Monte Carlo simulation  Impact phenomena  Plasmons  Surface excitations
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号