Artículo
Abstract:
Electron emission after grazing ion-surface collisions is studied for high impact velocities. We have focused on glancing angles of electron emission where the dominant mechanism is the ionization from atomic bound states. To describe this process, we introduce a quantum model called field distorted-wave (FDW) approximation, which takes into account the effect of the surface interaction on the electronic transition. The FDW model is applied to analyze electron distributions produced by impact of protons on Al and LiF surfaces, which are metal and insulator materials respectively. In the case of metals, we also evaluate the contibution coming from the valence band by employing the binary collisional formalism. Calculated electron emission yields are in reasonable agreement with the available experimental data. We find that the maximum of the convoy electron distribution is accelerated for Al and decelerated for LiF, with respect to its position in ion-atom collisions, in quantitative accordance with experiments. © Physica Scripta 2004.
Registro:
| Documento: | Artículo |
| Título: | Grazing ion-surface collisions |
| Autor: | Gravielle, M.S. |
| Ciudad: | Stockholm |
| Filiación: | Instituto de Astronomía y Física Del Espacio, CONICET, Casilla de Correo 67, Sucursal 28, 1428, Buenos Aires, Argentina Dpto. de Física, Universidad Nacional de Buenos Aires |
| Palabras clave: | Angular distribution; Approximation theory; Electron emission; Ground state; Ionization; Quantum theory; Atomic bound states; Glancing angles; Impact velocities; Ion-surface collisions; Molecular interactions |
| Año: | 2004 |
| Volumen: | T110 |
| Página de inicio: | 398 |
| Página de fin: | 402 |
| DOI: | http://dx.doi.org/10.1238/Physica.Topical.110a00398 |
| Título revista: | XXIII International Conference on Photonic, Electronic, and Atomic Collisions, 23rd ICPEAC |
| Título revista abreviado: | Phys Scr T |
| ISSN: | 02811847 |
| CODEN: | PHSTE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02811847_vT110_n_p398_Gravielle |
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Citas:
---------- APA ----------
(2004) . Grazing ion-surface collisions. XXIII International Conference on Photonic, Electronic, and Atomic Collisions, 23rd ICPEAC, T110, 398-402.http://dx.doi.org/10.1238/Physica.Topical.110a00398
---------- CHICAGO ----------
Gravielle, M.S. "Grazing ion-surface collisions" . XXIII International Conference on Photonic, Electronic, and Atomic Collisions, 23rd ICPEAC T110 (2004) : 398-402.http://dx.doi.org/10.1238/Physica.Topical.110a00398
---------- MLA ----------
Gravielle, M.S. "Grazing ion-surface collisions" . XXIII International Conference on Photonic, Electronic, and Atomic Collisions, 23rd ICPEAC, vol. T110, 2004, pp. 398-402.http://dx.doi.org/10.1238/Physica.Topical.110a00398
---------- VANCOUVER ----------
Gravielle, M.S. Grazing ion-surface collisions. Phys Scr T. 2004;T110:398-402.http://dx.doi.org/10.1238/Physica.Topical.110a00398
