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Following the recently accumulated information on the vibrational properties of the Cu(001) surface acquired through single and multiphonon He atom scattering experiments and the concomitant theoretical investigations, we have re-examined the properties of the Debye-Waller factor (DWF) characteristic of the He→Cu(001) collisions using the recently developed fully quantal and three-dimensional model...
Particles, such as atoms or electrons, inelastically scattered from a crystal surface in resonance with a bound state are predicted to focus around a discrete set of final angles with a defined energy for each angle. The final angle and energy of such focussed inelastic resonances (FIR) are shown to be independent of the initial state. A calculation of the FIR amplitude indicates favorable conditions...
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