2000
DOI: 10.1103/physreva.61.022902
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Neutralization ofHe+ions in front of an aluminum surface

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Cited by 33 publications
(16 citation statements)
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“…Early quantum mechanical calculations gave AN transition rates [1] which were several orders of magnitude smaller than those derived from experimental data [2][3][4]. This discrepancy between theory and experiment, however, could not be removed by more recent and sophisticated calculations focusing on the model system He-Al (simple electronic structure, no contributions from RN [5]) [4][5][6][7][8][9][10][11][12][13].…”
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confidence: 63%
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“…Early quantum mechanical calculations gave AN transition rates [1] which were several orders of magnitude smaller than those derived from experimental data [2][3][4]. This discrepancy between theory and experiment, however, could not be removed by more recent and sophisticated calculations focusing on the model system He-Al (simple electronic structure, no contributions from RN [5]) [4][5][6][7][8][9][10][11][12][13].…”
mentioning
confidence: 63%
“…(atomic units) from the topmost layer of surface atoms as result of short-range chemical interactions. Two alternative scenarios were discussed [8,12,14]: (1) ''high'' transition rates (larger distances of neutralization) and validity of the concept of classical image charges for the description of level shifts, or (2) ''low'' transition rates (smaller distances of neutralization) and deviations from such a description of level shifts.…”
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confidence: 99%
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“…To proceed one step further toward this aim, the present study investigates how the electronic properties of the target influence AN of He + ions in low energy ion scattering (LEIS) where single scattering events by a large angle prevail. This is not only of fundamental interest but also of vital importance in manifold applications, especially for surface analysis techniques such as Auger electron spectroscopy, [9][10][11][12] ion scattering under grazing incidence, 13 and LEIS. 14,15 LEIS is a common surface analysis technique, which is sensitive to the outermost atomic layers of the sample under investigation when noble gas ions are used as projectiles.…”
Section: Introductionmentioning
confidence: 99%
“…from the image plane which required AN rates orders of magnitude larger than theoretically predicted. However, Merino et al [144], More et al [145], and van Someren et al [146] pointed out that the He-1s level shift might be substantially reduced compared to the classical behavior for distances of some atomic units in front of the surface, as a consequence of a breaking down of the classical image-potential concept at close distances. Actually, theoretical calculations of the He-1s level energy shift showed reduced values or even negative shifts close to the surface as a result of chemical interactions with the surface [36,144,145,147].…”
Section: Energy Level Variationmentioning
confidence: 99%