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Inelastic energy loss in 100-keV H+ scattering from single atoms : theory and experiment for K, Rb, and Cs
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Hentz, A., Parkinson, G. S., Window, A. J. (Amanda J.), Quinn, P. D., Woodruff, D. P., Grande, P. L., Schiwietz, G., Bailey, P. and Noakes, T. C. Q. (2006) Inelastic energy loss in 100-keV H+ scattering from single atoms : theory and experiment for K, Rb, and Cs. Physical Review B (Condensed Matter and Materials Physics), Volume 74 (Number 12). Article number 125408 . doi:10.1103/PhysRevB.74.125408
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Official URL: http://dx.doi.org/10.1103/PhysRevB.74.125408
Abstract
The energy-loss spectrum associated with scattering of 100-keV H+ ions from K, Rb, and Cs atoms adsorbed on Al(111) has been investigated both experimentally and theoretically. Theoretical simulations were conducted based on calculations of the energy loss experienced in specific ion trajectories at the surface, using coupled-channel calculations to describe inner-shell ionization and excitation as a function of impact parameter. The energy losses can be attributed entirely to single atomic collisions from the alkali atoms, and the experiments reproduce the markedly increased asymmetry in scattering from Rb and Cs relative to K, attributable largely to the role of 3d and 4d excitations, respectively, and particularly the role of multiple excitations of these states. For Rb and Cs scattering, the data show excellent quantitative agreement between theory and experiment; for the K scattering, a discrepancy of a low-energy shoulder is attributed to a problem associated with the sample preparation.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | September 2006 | ||||
| Dates: |
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| Volume: | Volume 74 | ||||
| Number: | Number 12 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | Article number 125408 | ||||
| DOI: | 10.1103/PhysRevB.74.125408 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published |
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