The Study Of Highly Charged Lons Ar^q+,Neutral Cu_n Clusters In Grazing Incidence On Single-crystal Al（111）Surface

In this thesis, energy loss, electron emission and x-ray emission of slow highly charged ions Arq+(q≤17) grazing scattering from Al(111) single-crystal surface under various azimuthal angles have been studied. Within the Classical Over-Barrier Model, we developed the Monte Carlo program, including the charge exchange processes, and trajecoties calculation etc. By building the detailed surface description of Al(111) target, the dependence of energy loss, potential electron emission yields, intensity of KL1satellite lines or x-ray yields on low-index crystallographic directions was observed. The inner-shell filling contributions through side feeding mechanism, Auger transitions and radiative decay process are discussed by analyzing the final charge-state distributions of the reflected ions, potential electron emission yields and x-ray yields under different azimuthal angles. For Zior>Ztarget condition, the contribution of SF process is negligible. The calculated energy-loss spectra of atomic projectiles Ar0interacting with metallic surface agree reasonably well with experiment.In addition, by performing a molecular dynamics (MD) simulation, fragmentation and energy losses of neutral copper clusters Cun in grazing incidence on a single-crystal Al(111) surface under various azimuthal angles were studied. The interactions among copper atoms were modeled by tight-binding potential, and the position of each copper atom at each time step was calculated by integrating the Newton equations of motion. The regular-sized clusters without icosahedral structure appear to be less stable. The energy spectra of reflected particles for30keV copper clusters Cu147grazing scattering were measured under three angles of incidence, and some additional peaks appearing on the left side of the first peak were observed for large grazing angles of incidence.