Interaction of highly charged ions with metal and insulator surfaces: the fascination of hollow atoms
讲座名称：
Interaction of highly charged ions with metal and insulator surfaces: the fascination of hollow atoms
讲座时间：
2015-06-16
讲座人：
Nikolaus Stolterfoht
形式：
校区：
兴庆校区
实践学分：
讲座内容：
讲座题目：Interaction of highly charged ions with metal and insulator surfaces: the fascination of hollow atoms
讲座时间：2015年6月16日下午15:30-18:30
讲座地点：中1-3113
报 告 人：Prof. Dr. Nikolaus Stolterfoht
报告摘要：
A general overview concerning the physics of highly charged ions is given. Typical highly charged ions are Ne10+, Ar16+, and Xe30+produced by specific accelerators named electron cyclotron resonance source. When a highly charged ion approaches a metal surface, several electrons are captured into highly lying Rydberg states so that hollow atoms are produced. These fascinating species of neutral atoms carry a lot of potential energy, which can be dissipated into a solid within a small range of nanometers. It will be shown that the solid reacts by emitting several electrons and neutral target atoms which may form nanostructures on top of the surface. Moreover, when highly charged ions are send to through nanotubes (capillaries) in insulating materials, such as polymers, they create charge patches at the inner wall so that the following ions are deflected. Hence, a novel phenomenon of ion guiding through a long tiny capillary can be observed. A selective number of experiments with highly charged ion will be presented in conjunction with model calculations.
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