Charge Transfer Dynamics in Atom-Metal Surface Collisions |
| M. Wiertel, R. Taranko and E. Taranko Institute of Physics, M. Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland |
| Received: August 17, 1999 |
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| We study the charge exchange in atom-metal collisions in the framework of the generalized time-dependent Anderson-Newns model. The electron correlations and correlated hopping are treated within the mean-field approximation. The resulting one-particle model with an effective spin-dependent atom-surface coupling is used to study the charge transfer in scattering of Na and Li atoms on metal surfaces. It is shown that the effective occupation dependent atom-surface coupling influences mainly the expectation values for producing positive, neutral, and negative particles for small work functions and high atom velocities. It is also shown that the temperature dependence of these expectation values is more visible, especially for magnetic solutions. |
| DOI: 10.12693/APhysPolA.96.769 PACS numbers: 79.20.Rf, 78.70.-g, 82.65.Pa |