Effect of substrate temperature on the hydrogen reflection at metal surfaces

Doppler-broadening of the Hα emission spectra from hydrogen reflected at surfaces of palladium and tungsten sheet metal surfaces held at clamp holders were presented in this study. The reflected hydrogen atoms were observed with velocity components produced by the back scatterings of H₃⁺, H₂⁺ and H⁺ ion incident regions. Palladium exhibited higher spectrum emission intensities than tungsten for both clamp structures. Modification of the clamp structure should produce cooler surface condition due to direct contact of metal surface to the substrate holder thus having H atoms adsorbed more on the palladium sheet. (author)