Stopping powers and backscattered charge fractions for 20–150 keV H+ and He+ on gold

The stopping powers for 20–150 keV H+ and He+ in Au have been measured by the backscattering technique. Thin Au layers (∼ 10 nm) on Be substrates were used. The Au thickness (NΔt) was determined using Rutherford backscattering with 1 MeV He and a well calibrated detector geometry. An electrostatic analyser was used to determine the energy loss of the keV ions in penetrating the Au layer. This energy loss measurement was corrected for the …