ELECTRON-STIMULATED DESORPTION OF CO MOLECULES FROM CHEMISORBED CO LAYERS ON RU(001) - A COMPARISON OF THE DISTRIBUTIONS OF TRANSLATIONAL AND INTERNAL ENERGIES

The translational and internal energies of CO desorbed by electron imp act From well-ordered root 3x root 3 layers on Ru(001) are investigate d with time-of-flight techniques and resonance enhanced multiphoton io nization (REMPI) spectroscopy. We discriminate four desorption channel s with different translational and internal energy distributions. Tran slational and vibrational energies are positively, correlated: rotatio nal and vibrational-translational energies are negatively correlated. The microscopic origins of these correlations are discussed. (C) 1998 Elsevier Science B.V.