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论文类型：期刊论文

发表时间：2012-01-16

发表刊物：PHYSICS LETTERS A

收录刊物：SCIE

卷号：376

期号：5

页面范围：763-767

ISSN号：0375-9601

关键字：Wake potential; Stopping power; Nanosphere

摘要：The interaction of a charged particle with a nanosphere is studied based on the dielectric response theory. We obtain the analytical expressions of the induced potential and stopping power, as the charged particle moving outside the nanosphere with a constant velocity. From our results, since the spherical shape limitation, the well-known V-shaped wake effect tracing the particle cannot be observed clearly no matter at the nanosphere surface or in the bulk. Besides, we also find that the particle can even gain energy from the electron polarization as the particle moves to the nanosphere at relatively low velocity. (C) 2011 Elsevier B.V. All rights reserved.