Nonlinear effects in interactions of swift ions with solids
- Oak Ridge National Lab., TN (United States)
- Universidad Autonoma de Madrid (Spain). Dept. de Fisica de la Materia Condensada
The passage of a swift charged particle through a solid gives rise to a wake of induced electron density behind the particle. It is calculated for a proton penetrating an electron gas having the density of the valence electrons in gold, assuming linear response of the medium. The induced potential associated with the wake is responsible for the energy loss of the particle, and for many effects that have captured recent interest. These include, among others, vicinage effects on swift ion clusters, emission of electrons from bombarded solids, forces on swift ions near a surface, and energy shifts in electronic states of channeled ions. Furthermore, the wake has a determining influence on the spatial distribution, and character, of energy deposition in the medium. Previous theoretical studies of these phenomena have employed a linear wake, i.e., one that is proportional to the charge of the projectile, eZ. However, in most experiments that measure these effects, the conditions are such that the wake must include higher-order terms in Z. The purpose of this study is to analyze the nonlinear wake, to understand how the linear results must be revised.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Ministry of Education and Science (Spain)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10155588
- Report Number(s):
- CONF-9403123-1; ON: DE94012654; CNN: Contract 92-0168C; TRN: 94:013564
- Resource Relation:
- Conference: 15. Werner Brandt workshop on penetration phenomena,Gainesville, FL (United States),10-11 Mar 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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