Europhys. Lett, 48 (6), pp. 672-678 (1999)
Spatially resolved K-Auger emission of hyperthermal highly charged ions at an Al(111) surface
J. Mrogenda, J. Ducrée, E. Reckels and H. J. Andrä
Institut für Kernphysik, Westfälische
Wilhelm-Klemm-Str. 9, D-48149 Münster, Germany
(received 4 March 1999; accepted in final form 9 October 1999)
PACS. 73.20Mf - Collective excitations (including plasmons and other charge-density excitations).
PACS. 79.20Rf - Atomic, molecular, and ion beam impact and interactions with surfaces.
PACS. 34.50Dy - Interactions of atoms, molecules, and their ions with surfaces; photon and electron emission; neutralization of ions.
Within the framework of a scattering model for electrons leaving the solid, the location of emission of Auger electrons ejected by highly charged H-like and He-like ions impinging on Al(111) can be determined when comparing the Auger electron spectra at observation angles and with respect to the surface plane. The distinct modifications of the spectra due to plasmon energy loss structures allow to attribute locations of emission to specific K-Auger processes of H-like and metastable He-like ions and at 1 eV per charge experimental vertical kinetic energy.
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