"Two-Layer" Behavior of the Pt(111) Surface during Low-EnergyAr+-Ion Sputtering at High Temperatures

Abstract
The discovery of a "two-layer" behavior of the surface resulting from the concomitant action of sputtering and annealing at high temperatures is reported. As a result the intensity of thermal He beams scattered from a surface under ion bombardment exhibits pronounced oscillations. The use of this new feature for the measurement of sputtering yields of virgin surfaces is proposed.