Phys. Rev. Lett. 85, 3137–3140 (2000)Subsurface-Channeling-Like Energy Loss Structure of the Skipping Motion on an Ionic CrystalReceived 18 April 2000; published in the issue dated 9 October 2000 The skipping motion of Ne+ ions in grazing scattering from the LiF(001) surface is studied for velocity below 0.1 a.u. with a time-of-flight technique. It is demonstrated that suppression of electronic excitation and dominance of optical phonon excitation in the projectile stopping results in an odd 1,3,5,… progression of the energy loss peaks, a feature usually ascribed to subsurface channeling. The experimental findings are well reproduced by parameter-free model calculations where thermal vibrations are the dominant cause for the ion trapping and detrapping. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.3137
DOI:
10.1103/PhysRevLett.85.3137
PACS:
34.50.Bw, 34.50.Dy, 63.20.-e, 79.20.Rf
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