Abstract
Inelastic effects in the scattering of Ar-40, Ne-20 and He-4 ions from GdF 3 and Gd 2O 3 have been studied. Such effects give rise to the low energy ‘tail’ of the elastic peaks in ion surface scattering (ISS). Experimental data show that the extent of ‘tailing’ increases from Ar-40 to He-4. For each probe ion type, the background is significantly greater in GdF 3 than in Gd 2O 3. The significance of (1) surface structure, (2) the surface polarization model and ion surface scattering, and (3) electronic effects on this low energy background will be shown by discussing the present data as well as supplementary results on He-4 ion scattering from selected oxides and polar surfaces of Gd 2 (MoO 4) 3.
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