Perturbative treatment of quasi-resonant proton neutralization at alkali-halide surfaces |
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| Authors: | Franco Battaglia Thomas F George Armando Lanaro |
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| Institution: | Department of Chemistry, University of Rochester, Rochester, New York 14627, USA;Departments of Chemistry and Physics, State University of New York at Buffalo, Buffalo, New York 14260, USA;Department of Physics, University of Rochester, Rochester, New York 14627, USA |
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| Abstract: | A theoretical investigation of proton neutralization by proton scattering from several alkali-halide surfaces is presented. These systems are suitable for a perturbative treatment since no hydrogenic atomic shell is embedded in the valence band of the solid where the neutralizing electron originates, which is a necessary condition for fast convergence of the perturbative expansion for the neutralization probability. The perturbative interaction is modeled by a Fano-Anderson effective potential, and the dependence of the results on the properties of the systems (namely, the width of the valence band of the solid and its position relative to the discrete atomic level) and on the dynamics of the process (determined here by a single parameter which controls the duration of the interaction, i.e., the collision energy) are critically discussed. |
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