Binary-electron emission in grazing ion-surface collisions

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.53.895· OSTI ID:278521

Martiarena, M L; Sanchez, E A; Grizzi, O; Ponce, V H ^[1]

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1. Centro Atomico Bariloche, 8400 Bariloche, Rio Negro (Argentina)

We study the binary-electron production due to single-electron excitation by the direct screened Coulomb interaction between the projectile and the surface. We analyze the energy spectra of electrons emitted during the interaction of ions with surfaces under grazing incidence conditions. For high ion energies ({approx_gt}100 keV/amu), the binary-electron peak is shifted to energies lower than those expected in ion-gas collisions. The calculations of the electron energy distributions for different projectile charges, surfaces with different Fermi energies and work functions, and several electron observation angles are in qualitative agreement with the experimental data. For lower ion energies (30{endash}100 keV), the present model gives a better description at large observation angles. This indicates that the {open_quote}{open_quote}shifted convoy{close_quote}{close_quote} structure, which dominates the electron emission spectrum around the direction of the specular reflection, cannot be ascribed to a binary-collision mechanism. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 278521
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELECTRON COLLISIONS
ELECTRON EMISSION
ENERGY SPECTRA
EXCITATION
ION COLLISIONS
KEV RANGE 10-100
KEV RANGE 100-1000
SURFACES