Isotope Effect in Electron Stimulated Desorption: Oxygen Chemisorbed on Tungsten
- 15 May 1970
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 52 (10) , 5215-5220
- https://doi.org/10.1063/1.1672766
Abstract
Electron stimulated desorption (ESD) studies of oxygen chemisorbed on tungsten have revealed a large isotope effect in the desorption of ions. The probability of desorption of 16O+ was found to be a factor of ∼1.5 greater than the probability of desorption of 18O+ upon bombardment of the adsorbed layer by 100‐eV electrons. This observation is quantitatively consistent with the ESD mechanism proposed independently by Redhead and by Menzel and Gomer. On the other hand, the small isotope effect observed in ESD “total” desorption does not agree with this mechanism; possible reasons for this are discussed.Keywords
This publication has 16 references indexed in Scilit:
- Temperature Effects in Desorption by Electron Impact: Molecular Vibrations in the Chemisorbed LayerThe Journal of Chemical Physics, 1969
- Production of Excited Atoms by Impact of Fast Electrons on Molecular Hydrogen and DeuteriumThe Journal of Chemical Physics, 1969
- Desorption by electron impact: Oxygen adsorbed on tungstenSurface Science, 1968
- Desorption, Dissociation, and Ionization of Adsorbed Particles by Slow Electrons: Carbon Monoxide on TungstenBerichte der Bunsengesellschaft für physikalische Chemie, 1968
- Electron-Bombardment Desorption: Carbon Monoxide Adsorbed on TungstenThe Journal of Chemical Physics, 1968
- Electron Impact Ionization Cross-Section Data for Atoms, Atomic Ions, and Diatomic Molecules: I. Experimental DataReviews of Modern Physics, 1966
- Electron-Impact Desorption of Carbon Monoxide from TungstenThe Journal of Chemical Physics, 1964
- INTERACTION OF SLOW ELECTRONS WITH CHEMISORBED OXYGENCanadian Journal of Physics, 1964