Phys. Rev. Lett. 83, 864–867 (1999)Energy Loss of Low Energy Protons on LiF(100): Surface Excitation and H- Mediated Electron EmissionReceived 8 January 1999; published in the issue dated 26 July 1999 Impact of 600 eV protons at grazing incidence on LiF(100) is studied with a new coincidence technique combining energy loss and electron spectroscopy. Correlation between the secondary electrons and the charge state of the scattered projectiles demonstrates the role of the H- ions formed on the surface as precursors for electron emission. However, the main channel for energy loss is not associated with electron emission but is interpreted as the population of surface excitons. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.864
DOI:
10.1103/PhysRevLett.83.864
PACS:
79.20.Rf, 34.50.Dy, 34.70.+e, 73.20.-r
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