Models for L-shell filling of slow hollow atoms moving below a surface

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 99; no. 1; pp. 4 - 7
• Main Authors: Stolterfoht, N., Köhrbrück, R., Grether, M., Spieler, A., Arnau, A., Page, R., Saal, A., Thomaschewski, J., Bleck-Neuhaus, J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.1995
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/0168-583X(95)00207-3

A multiple cascade model is used to analyze the filling of L- and K-vacancies of hollow Ne atoms moving in shallow layers of an Al (111) surface. The model requires cross sections for charge transfer into the L-shell of the projectile which were determined from molecular-orbital calculations based on solid-state energies and screening effects. The analysis includes mechanisms of Landau-Zener curve-crossing and Fano-Lichten promotion. Absorption and build-up effects within the solid were taken into account. The results from the cascade model show good agreement with the ratio of L- to K-Auger emission recently measured for Ne 9+ incident on Al.