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We investigate experimentally the diffraction of fast atoms of noble gas on aLiF(100) crystal oriented along the [100] and [110] directions. The wavelengthsare so short that the observed quantum features are qualitatively described bysemi-classical models.  With increasing mass and energy, the scattering profiles show an increasingnumber of diffraction peaks forming an increasing number of supernumeraryrainbow peaks but progressively weakening in contrast. The innermost peakscorresponding to individual Bragg peaks disappear first. Along the [100]direction, only one type of atomic row contributes to the diffraction signal.After removing the contributions of the attractive forces, we presenttopological corrugation that should compare with those accessible with anatomic force microscope (AFM).

Diffraction of fast heavy noble gas atoms, Ar, Kr and Xe on a LiF(001) surface Changing the tip of a 'perfect' AFM