Angle resolved electron spectra from collisions of doubly charged noble gas ions with a metal surface

Autor:	P.A. Zeijlmans van Emmichoven, Paaf Peter Wouters, A. Niehaus
Přispěvatelé:	Pre TU & All other research faculty E
Rok vydání:	1989
Předmět:	Argon Chemistry Electron capture Noble gas chemistry.chemical_element Electron Surfaces and Interfaces Condensed Matter Physics Ion Surfaces Coatings and Films Neon Autoionization Penning ionization Physics::Atomic and Molecular Clusters Materials Chemistry Atomic physics
Zdroj:	Surface Science, 211-212, 249-255. Elsevier
ISSN:	0167-2584 0039-6028
DOI:	10.1016/0167-2584(89)90325-3
Popis:	We have measured electron spectra arising from keV collisions of doubly charged helium, neon and argon ions with a single crystal Cu(110) surface. At low angle of incidence the projectiles are reflected from the surface. Under these conditions the following two step processes contribute to the electron spectra. In the first step the doubly charged ions are converted to singly charged ions by Auger capture or by resonant double electron capture followed by autoionization or Penning ionization. In the second step the singly charged ions are neutralized by Auger capture. Calculations on the electron production processes have been performed using model functions for distance-dependent transition rates and transition energies. The main features of the observed spectra can be well reproduced in these calculations if it is assumed that the metal does not respond instantaneously to the sudden changes induced upon the emission of fast electrons in the various charge exchange processes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d3fd1a1d9365967f4daff22c7d67b2d https://doi.org/10.1016/0167-2584(89)90325-3 Zobrazit plný text záznamu