Multiple-cascade model for the filling of hollow Ne atoms moving below an Al surface
- 1 July 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 52 (1) , 445-456
- https://doi.org/10.1103/physreva.52.445
Abstract
Analytic expressions for a multiple-cascade model were derived to study the filling of L and K vacancies of hollow Ne atoms moving in shallow layers of an Al surface. The model requires cross sections for charge transfer into the L shell of the projectile that were determined from molecular-orbital calculations including screening effects of hollow atoms and asymptotic solid-state energies. The analysis accounts for mechanisms of Landau-Zener curve crossing and Fano-Lichten promotion. To describe the transport of the electrons within the solid, absorption and buildup effects were taken into account. The results from the cascade model show good agreement with angular distributions of Ne K Auger electrons recently measured. Attenuation effects were found to produce shifts in the K Auger spectra at varying observation angles. The significant difference previously observed for the mean L-shell occupation numbers during L and K Auger emission is explained by the present model.Keywords
This publication has 48 references indexed in Scilit:
- Radiative Electron Capture of Slow K Ionized Ions Travelling Into SolidsEurophysics Letters, 1991
- Study of the interaction of very slow hollow atoms with a solidThe European Physical Journal D, 1991
- Auger Electrons Resulting from Slow H-Like Ions Neutralized near a Tungsten SurfaceEurophysics Letters, 1990
- Production of hollow atoms by the excitation of highly charged ions in interaction with a metallic surfacePhysical Review Letters, 1990
- Electronic interaction of multicharged ions with metal surfaces at low velocitiesNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1989
- Electron emission induced by multiply charged Ar ions impinging on a tungsten surfaceSurface Science, 1989
- Charge exchange processes between highly charged ions and metal surfacesNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1987
- Observation of the neutralization of highly charged ions interacting with a metal surfacePhysical Review A, 1987
- Electron emission from the interaction of multiply charged ions with a Au(110) surfaceSurface Science, 1986
- Electron beam ion sources and associated physics at JINRNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1985