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论文类型：期刊论文

发表时间：2009-09-15

发表刊物：9th International Conference on Computer Simulation of Radiation Effects in Solids

收录刊物：SCIE、EI、CPCI-S、Scopus

卷号：267

期号：18

页面范围：3129-3132

ISSN号：0168-583X

关键字：2D electron gas; QHD model; Stopping power

摘要：In this paper, we investigate the electronic excitations induced by a charged particle moving outside a nano-dielectric sphere covered with infinitesimally thin metal film by using the linearized quantum hydrodynamic (QHD) theory. General expressions of the induced potential of the electron and the stopping power of the charged particle are derived in spherical coordinates systems. In our calculations, the spherical distribution of the induced potential for different particle speed is examined. The results indicate that an oscillatory wake effect exists in the electron gas during the interactions. In addition, the dependence of the stopping power on a charged particle position and relative permittivity of a dielectric sphere is analyzed. (C) 2009 Elsevier B.V. All rights reserved.