Energy loss of keV fluorine ions scattered off a missing-row reconstructed Au(110) surface under grazing incidence

Abstract

A joint experimental and theoretical study of energy loss is presented for 1-to-4-keV fluorine negative ions in grazing scattering on a missing-row reconstructed Au(110) surface. Measurements of energy losses for various azimuthal orientations of the crystal have been performed by means of a time-of-flight method with a pulsed beam. The dependence of the fraction of surviving negative ions on azimuthal angles, was determined. Our energy-loss data are discussed in light of trajectory and stopping-power calculations, where the explicit inclusion of the nonuniform electron density at the surface provides good agreement with the experimental data. The simulation allows us to delineate various trajectory classes that correspond to different contributions in the energy-loss spectra for various azimuthal orientations of the surface.

Energy-loss contribution to grazing scattering of fast He atoms from a silver surface

“…Inset: Detail of the primary spectrum. structures have indeed been observed for axial channeling collisions where projectile penetration into the atomic surface can occur [28,41], in the present case the energy-loss structures of the primary spectrum are completely washed out when the experimental resolution for the initial conditions is taken into account. The convoluted energy-loss distribution shows a smooth behavior, with a broad maximum whose position is in fairly good agreement with the experimental one.…”

Dissociation and Charge Transfer of H2O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy

“…In addition, we have not measured the azimuth dependence of negative-ion fraction, so we cannot investigate the effects related to the surface reconstruction at present. 51…”

Trajectory-dependent energy loss for swift He atoms axially scattered off a silver surface

“…During the last decade many experimental and theoretical works were devoted to study the energy lost by atomic projectiles after grazingly colliding with crystal surfaces under axial surface channeling conditions, i.e. impinging along low indexed crystallographic directions [1][2][3][4]. Recently the subject has attracted renewed attention as a consequence of the experimental observation of fast atom diffraction (FAD) from crystal surfaces [5,6], where energy loss processes are considered to play an important role against quantum coherence [7].…”