Influence of the lighting on Fast Atom Diffraction studied via a semi-quantum approach

Abstract

The influence of the collimating conditions of the incident beam on diffraction patterns produced by grazing scattering of fast atoms off crystal surfaces is studied within a semi-quantum approach, named Surface Initial Value Representation (SIVR) approximation. In this approach we incorporate a realistic description of the incident particle in terms of the collimating parameters, which determine the surface area that is coherently illuminated. The model is applied to He atoms colliding with a LiF(001) surface after passing through a rectangular aperture. As it was experimentally observed [1], SIVR spectra as a function of the azimuthal angle are very sensitive to the width of the collimating slit. We also found that the length of the collimating aperture affects polar angle distributions, introducing additional interference structures for the longer collimating slits.

References in corpus (2)

• Influence of the polarization in grazing scattering of fast hellium atoms from LiF(001) surfaces
• Semi-quantum approach for fast atom diffraction: solving the rainbow divergence

Cited by in corpus (8)

• The interaction of atoms with LiF(001) revisited
• Van der Waals effects on grazing incidence fast atom diffraction for H/LiF(001)
• Phonon contribution in grazing-incidence fast atom diffraction from insulator surfaces
• Single- and double-slit collimating effects on fast-atom diffraction spectra
• Thermal effects on helium scattering from LiF(001) at grazing incidence
• Decoherent phonon effects in fast atom-surface scattering
• Surface analysis via fast atom diffraction: pattern visibility and spot-beam contribution
• Terrace effects in grazing-incidence fast atom diffraction from a LiF(001) surface