Scattering of slow ions from insulator surfaces at the example of molecular oxygen from LiF(100)

Autor(en): Scheer, JA
Wurz, P
Heiland, W
Stichwörter: COLLISIONS; ELECTRON-EMISSION; EXCITATION; GRAZING SCATTERING; Instruments & Instrumentation; IONIZATION; LIF; LOW-ENERGY PROTONS; NEGATIVE-IONS; NEUTRAL ATOMS; neutral particle imaging; Nuclear Science & Technology; particle scattering; Physics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear; STIMULATED DESORPTION; surface ionization
Erscheinungsdatum: 2003
Herausgeber: ELSEVIER SCIENCE BV
Journal: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volumen: 212
Startseite: 291
Seitenende: 296
Zusammenfassung: 
We scattered molecular oxygen ions at grazing incidence from a LiF(100) surface in the energy range from 880 to 3040 eV. About 50% molecular survival was obtained at the lowest primary energy of 881 eV and this dropped to about 4% at 3039 eV. Below 2 keV beam energy we found negative ion fractions of less than 2%, which increases up to 6% at about 3 keV primary energy. The molecular survival is much higher whereas the negative ion fraction is much lower compared to other insulating materials, i.e. diamond and MgO. The mean energy loss is found to increase linearly with energy and is in the order of a few percent. (C) 2003 Elsevier B.V. All rights reserved.
Beschreibung: 
20th International Conference on Atomic Collisions in Solids, PURI, INDIA, JAN 19-24, 2003
ISSN: 0168583X
DOI: 10.1016/S0168-583X(03)01838-X

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