Neutralization of charged fullerenes during grazing scattering from a metal surface.
The neutralization of C(60)(+) and C(60)(2+) fullerenes with keV energies is studied for grazing scattering from a clean and flat Al(001) surface. From the measured shifts between the angular distributions for scattered projectiles of different incident charge, we derive image-charge interaction energies, which relate to the distances of electron transfer for C(60)(+) and C(60)(2+). These neutralization distances are in accord with a classical over-the-barrier model taking into account the image-charge effects of the Al target and the polarization of the fullerene.
Institut für Physik, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 6, D-12489 Berlin, Germany.
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Wethekam
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Winter
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Cederquist
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Zettergren