Electron-shell effects in particle-induced kinetic electron emission from solids
Ion-induced electron emission from solids is generally a complex interplay of electron excitation in the solid, transport of energetic electrons towards the surface, and emission of electrons across the surface barrier. This paper discusses the shell effect in electron emission from solids and examines the results available so far, which are in keeping with Ploch's model. It concludes, however, that before a quantitative model can be expected to work, more information from low-energy atom/atom collisions is needed and details on the influence of the band structure on the excitation/de-excitation process are required. The electron-shell effect on electron emission has a disquieting aspect in particle detection as it renders the detection sensitivity atomic number dependent. Surface treatments that are usually applied to enhance electron emission tend to smear out the amplitudes of the oscillations and thus alleviate the discrimination problem.
Bibliographic Reference: Article: NATO Advanced Research Workshop on Ionization of Solids by Particle Bombardment, Proceedings (1993) pp. 161-172
Record Number: 199311555 / Last updated on: 1994-11-28
Original language: en
Available languages: en