Geodesic
Three Regimes of Diffusion Migration of Hydrogen Atoms in Metals
Teoretičeskaâ i matematičeskaâ fizika, Tome 145 (2005) no. 2, pp. 256-271

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The classical diffusion theory cannot explain the temperature kink of the activation energy and the anomalous isotopic effect observed in the hydrogen atom migration in BCC metals. We present a theory based on the equations of quantum statistical mechanics that permits interpreting both these phenomena completely. We consider three possible mechanisms for an elementary act of hydrogen diffusion in metals: the over-barrier hopping, the thermally activated tunnel transition, and the tunneling due to decay of a local deformation near the hydrogen atom.
Keywords: quantum statistical mechanics, hydrogen atom, metal, atom jump, tunneling, activation energy.
Mots-clés : diffusion 
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     title = {Three {Regimes} of {Diffusion} {Migration} of {Hydrogen} {Atoms} in {Metals}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     url = {http://geodesic.mathdoc.fr/item/TMF_2005_145_2_a9/}
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Yu. A. Kashlev. Three Regimes of Diffusion Migration of Hydrogen Atoms in Metals. Teoretičeskaâ i matematičeskaâ fizika, Tome 145 (2005) no. 2, pp. 256-271. http://geodesic.mathdoc.fr/item/TMF_2005_145_2_a9/