Phys. Rev. Lett. 65, 3156–3159 (1990)Excitation of electrons from an Al surface by grazing-angle-incident fast heavy ionsReceived 14 June 1990; published in the issue dated 17 December 1990 Measurements were made, at various emission angles, of energy spectra of electrons from Al induced by grazing-angle-incident ions of N6+, Ar12+, and Xe27+ with equal velocities corresponding to 0.98 MeV/amu. A new line which could not be explained by any of the hitherto identified mechanisms was observed at an energy obviously larger than that of an electron with a velocity equal to the projectile. The projectile and emission angle dependencies of the line are consistent with the dynamic image potential acceleration mechanism. © 1990 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.65.3156
DOI:
10.1103/PhysRevLett.65.3156
PACS:
79.20.Nc, 79.20.Rf
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