Energy‐resolved ESD data obtained from Ag(110) after exposure to oxygen at room temperature are presented. The oxygen is found to desorb predominantly as a hydroxyl species. The surface hydrogen apparently originates from the bulk silver and is only removed slowly over many sample anneals. OH + desorbs with an energy of 4.7 eV, and H + desorbs with an energy of 3.0 eV. The results suggest that oxygen adsorbs at two or more different bonding sites on this surface. OH + desorbs by ESD from the most prevalent of these sites, and O + desorbs from another site which seems to fill first upon oxygen exposure. The primary beam energy is an important ESD variable since exciting the Ag 3d core levels results in a substantial reduction in the OH + desorption yield.
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Corallo et al. (1988) studied this question.
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