Electron dynamics in H/Na/Cu(1 1 1) collisions |
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Authors: | B Bahrim S Yu JW Rabalais |
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Institution: | a Department of Chemistry and Physics, Lamar University, 4400 MLK, P. O. Box 10046, Beaumont, TX 77710, USA b Department of Chemistry, University of Houston, Houston, TX 77204, USA |
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Abstract: | Surface adsorbates induce strong local perturbations in the electronic structure and potentials in their surroundings. Consequently, charge transfer processes between projectiles and adsorbate-covered surfaces are strongly affected. The theoretical calculations and experiment measurements reported herein are focused on the H−/Na/Cu(1 1 1) system. The electron dynamics at the Na/Cu(1 1 1) surface and the influence of Na adsorbates on the H−-Cu(1 1 1) charge transfer are treated and discussed in detail. The ion fractions are mainly influenced by the ion exit trajectories. At low Na coverage, they exhibit a maximum near the 60° exit angle from surface. The calculations and experimental data are in good agreement. |
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Keywords: | Ion-solid interactions Atomistic dynamics Copper |
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