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Surface self‐diffusion of quench condensed hydrogen films
Author(s) -
Classen J.,
Eschenröder K.,
Weiss G.
Publication year - 1995
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19955070102
Subject(s) - annealing (glass) , materials science , attenuation , hydrogen , condensed matter physics , surface diffusion , diffusion , self diffusion , molecular physics , thermodynamics , physics , optics , chemistry , adsorption , composite material , self service , quantum mechanics , marketing , business
The annealing behaviour of quench condensed H 2 ‐, HD‐ and D 2 ‐films has been investigated using acoustic surface waves. Upon annealing at temperatures far below the triple point we observe drastic changes of sound velocity and attenuation which can be attributed to a considerable rearrangement of the film structure via surface diffusion. These findings are in good agreement with recent experiments using surface plasmons. From the temperature dependence of the speed of the structural changes we deduce the activation energies for surface self‐diffusion as 23 K, 35 K, and 47 K for H 2 , HD, and D 2 , respectively.