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Ion angular distributions in electron stimulated desorption: oxygen and CO on W(111). Technical report

Technical Report ·
OSTI ID:7140112

The ion angular distributions resulting from electron stimulated desorption (ESD) of oxygen and carbon monoxide chemisorbed on a tungsten (111) crystal have been determined. The O/sup +/ ions released during ESD of adsorbed oxygen exhibit three-fold symmetric angular distributions in orientational registry with the W(111) substrate. The CO/sup +/ and O/sup +/ ions released during ESD of a monolayer of CO are desorbed normal to the (111) surface. Models for both oxygen and CO adsorption are discussed. The data for CO are consistent with adsorption of CO in 'standing up' carbonyl structures in the virgin and alpha CO binding states. (Author) (GRA)

Research Organization:
National Bureau of Standards, Washington, D.C. (USA)
OSTI ID:
7140112
Report Number(s):
AD-A-020524
Country of Publication:
United States
Language:
English