Charge-exchange in cesium ions/atoms scattered or sputtered from metal surfaces

Abstract

The charge states of Cs ions/atoms scattered from Cs/W(110) or sputtered from Cs/Al surfaces have been calculated as a function of the work function and the temperature of the surface in terms of the time-dependent Newns-Anderson quantum model with the intra-atomic Coulomb interaction. The calculated results are in good agreement with the experimental data. Furthermore, the probabilities of charge states of the moving Cs ions/atoms approaching and leaving the surface are demonstrated.