Subsurface-Channeling-Like Energy Loss Structure of the Skipping Motion on an Ionic Crystal

J. Villette, A. G. Borisov, H. Khemliche, A. Momeni, and P. Roncin
Phys. Rev. Lett. 85, 3137 – Published 9 October 2000
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Abstract

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.

  • Received 18 April 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.3137

©2000 American Physical Society

Authors & Affiliations

J. Villette, A. G. Borisov, H. Khemliche, A. Momeni, and P. Roncin*

  • Laboratoire des Collisions Atomiques et Moléculaires (CNRS UMR 8625), Université Paris Sud, Batiment 351, F-91405, Orsay Cedex France

  • *Corresponding author. Electronic address: roncin@lcam.u-psud.fr

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Vol. 85, Iss. 15 — 9 October 2000

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