Hentz, A. ; Parkinson, G.S. ; Quinn, P.D. ; Muñoz-Márquez, M.A. ; Woodruff, D.P. ; Grande, P.L. ; Schiwietz, G. ; Bailey, P. ; Noakes, T.C.Q.: Direct observation and theory of trajectory-dependent electronic energy losses in medium-energy ion scattering. Physical Review Letters 102 (2009), p. 096103/1-4
10.1103/PhysRevLett.102.096103
Abstract:
The energy spectrum associated with scattering of 100 keV H+ ions from the outermost few atomic layers of Cu(111) in different scattering geometries provides direct evidence of trajectory-dependent electronic energy loss. Theoretical simulations, combining standard Monte Carlo calculations of the elastic scattering trajectories with coupled-channel calculations to describe inner-shell ionization and excitation as a function of impact parameter, reproduce the effects well and provide a means for far more complete analysis of medium-energy ion scattering data.