Kinetic electron emission induced by grazing scattering of heavy ions from metal surfaces

Journal Article · Fri Aug 01 04:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.022903· OSTI ID:20640072

Song, Yuan-Hong; Wang, You-Nian; Miskovic, Z L ^[1]

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1. The State Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams, Department of Physics, Dalian University of Technology, Dalian 116023, People's Republic of China (China)

The angle-resolved energy spectra of the electrons emitted from a metal surface during specular reflection of heavy ions have been studied by means of the first-order, time-dependent perturbation theory, with the electron states obtained from a finite step-barrier potential model. The surface response has been described by the dielectric formalism within the specular reflection model, where the local-field correction and the plasmon-pole approximation have been used for the dielectric function in the cases of low and high ion velocities, respectively. The ion trajectory has been evaluated based on the surface continuum potential and the ion image potential, whereas the screening of the ion by the bound electrons has been taken into account by means of the Brandt-Kitagawa model. It has been found that the electron spectra are dominated by the decay of surface plasmons for fast incident ions, whereas the electron emission is dominated by the single-electron excitation mechanism for slow incident ions.

• OSTI ID: 20640072
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 68; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRECTIONS
DECAY
DIELECTRIC MATERIALS
ELECTRON EMISSION
ELECTRON SPECTRA
ELECTRONS
ENERGY SPECTRA
EXCITATION
HEAVY IONS
IMAGES
ION-ATOM COLLISIONS
METALS
PERTURBATION THEORY
PLASMONS
POTENTIALS
REFLECTION
SCATTERING
SURFACES
TIME DEPENDENCE