The surface temperature dependence of the inelastic scattering and dissociation of hydrogen molecules from metal surfaces

2004 ◽  
Vol 120 (6) ◽  
pp. 2923-2933 ◽  
Author(s):  
Z. S. Wang ◽  
G. R. Darling ◽  
S. Holloway
Keyword(s):  
Surface Temperature ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Metal Surfaces ◽  
Hydrogen Molecules

Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

1982 ◽  
Vol 40 ◽  
pp. 78-79
Author(s):  
Kenneth H. Downing ◽  
Robert M. Glaeser
Keyword(s):  
Electron Beam ◽  
Fatty Acid ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Structural Damage ◽  
Direct Result ◽  
Second Step ◽  
Strong Temperature Dependence ◽  
Electron Dose ◽  
Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

Rotational polarization and filtering of hydrogen molecules by metal surfaces – isotope effects

1999 ◽  
Vol 427-428 ◽  
pp. 358-363 ◽  
Author(s):  
Wilson Agerico Diño ◽  
Hideaki Kasai ◽  
Ayao Okiji
Keyword(s):  
Metal Surfaces ◽  
Isotope Effects ◽  
Hydrogen Molecules

ORTHO-PARA HYDROGEN CONVERSION ON METAL SURFACES

1991 ◽  
Vol 05 (18) ◽  
pp. 1191-1198 ◽  
Author(s):  
E. ILISCA
Keyword(s):  
Charge Transfer ◽  
Low Temperature ◽  
Metal Surfaces ◽  
Noble Metals ◽  
Large Family ◽  
Para Hydrogen ◽  
Electron Hole ◽  
Efficient Mechanism ◽  
Hydrogen Molecules ◽  
Metal Electron

EELS experiments of H 2 absorbed at low temperature on Noble Metals have indicated that the o-p H 2 conversion can be very fast on metals, even in absence of chemisorption, in contradiction with the usual belief that the catalyst must be magnetic to be efficient. We examine a large family of processes which convert the hydrogen molecules on the basis of the emission of metal electron-hole pairs. The most efficient mechanism found is the Coulomb-Contact one based on a virtual charge transfer, back and forth, from the metal to the molecule, having a rate in agreement with experiment.

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