Europhys. Lett.
Volume 48, Number 6, December 1999
Page(s) 672 - 678
Section Condensed matter: electronic structure, electrical, magnetic and optical properties
Published online 01 September 2002
DOI: 10.1209/epl/i1999-00537-2

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 Wilhelms-Universität Münster
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 $45^\circ$ and $0.8^\circ$ 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 $\rm C^{5,4+}$ ions and $\rm N^{6,5+}$ at 1 eV per charge experimental vertical kinetic energy.


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