Near-threshold emission of electrons during grazing scattering of keV Ne atoms from an Al(111) surface

Abstract

Computer simulations on elastic energy transfer to Al lattice atoms for specular scattering of 5 keV Ne atoms from Al͑111͒ under ⌽ in = 5.5°. Full circles: distance of closest approach to specific Al atoms r min ജ 1.2 a.u., open circles: r min Ͻ 1.2 a.u.. BRIEF REPORTSPHYSICAL REVIEW B 71, 033405 ͑2005͒ 033405-3

Electron Emission for Grazing Slow Atom and Ion Impact on Monocrystalline Metal and Insulator Surfaces

“…A detailed study on electron promotion for grazing surface scattering has recently been performed with keV Ne atoms scattered from Al(111). In this work quantitative information on the relevant interaction channels was derived from the energy loss spectra [34].…”

“…Recently, similar investigations have been carried out for grazing scattering of Ne 0 atoms on Al(111). It was found that, irrespective of the total projectile energy, a pronounced increase of the total electron yield occurs, if the impact energy for motion normal to the surface exceeds about 25 eV [34]. Based on projectile energy loss spectra and computer simulations of classical projectile trajectories, this increased electron emission was attributed to promotion in binary collisions between the Ne projectiles and Al target atoms, resulting in single and double projectile excitations followed by electron emission [35][36][37].…”

Negative ions, energy loss, and electron emission during grazing scattering of fast H and He atoms from a clean and oxidized NiAl(110) surface

“…In those studies it was found out that electronic excitation and emission phenomena during ion impact on a metal surface are dominated for grazing angle impact by binary encounters with conduction electrons [6]. For incidence under larger angles electron promotion in collisions with small impact parameters will also play an important role [7].…”

Electron-ion/atom coincidence measurements of 3keV He+ interacting with a SiH(100)-(2×1) surface

“…He + and He 0 , on a large area position-sensitive detector have been measured in coincidence with the corresponding emitted electrons. Grazing multiply charged ion scattering has been investigated previously [5][6][7][8][9] for the purpose of measuring the number statistics of emitted electrons in coincidence with the projectile scattering angle distribution. However grazing trajectories interact with many surface scattering sites and thus do not provide lattice site-resolved information.…”