Quasi-resonant neutralization of He+ ions at a germanium surface
| Autor: | Goebl, D., Roth, D., Primetzhofer, D., Monreal, R. C., Abad, E., Putz, A., Bauer, P. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Journal of Physics: Condensed Matter 25, 485006 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0953-8984/25/48/485006 |
| Popis: | When low-energy He ions are scattered from a Ge surface, the fraction of positive ions exhibits characteristic oscillations as a function of ion energy. These oscillations are caused by quasi-resonant neutralization (qRN), a process which can be observed for materials with a narrow band nearly resonant with the unperturbed He-1s level. In the present manuscript, we employ recently developed theoretical methods to extract quantitative information on the efficiency of qRN. Our evaluation reveals that qRN is a highly efficient process leading to ion fractions two orders of magnitude lower than in systems for which neutralization is only due to Auger processes. Comment: Removed typos. Improved clarity of some passages. Minor changes in section IV, first and last paragraph |
| Databáze: | arXiv |
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