Surface resonances in vibrational spectroscopy of hydrogen on transition metal surfaces: Pd(100) and Pd(111)

Abstract

Measurements of the elastic electron reflectivity of clean and hydrogen-covered Pd(100) and the primary energy dependence of the hydrogen vibrational cross sections are reported, and compared to earlier results for Pd(100) H . In contrast to Pd(111), Pd(100) has a dipole active H vibrational mode and thus the two surfaces serve as models for the H/transition metal system. A model which includes both long-range inelastic and short-range elastic, non-specular scattering is proposed, which accounts for the experimentally observed features of the Pd H system.