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Surface self-diffusion of quench condensed hydrogen films

✍ Scribed by J. Classen; K. Eschenröder; G. Weiss

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
515 KB
Volume
507
Category
Article
ISSN
0003-3804

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✦ Synopsis

The annealing behaviour of quench condensed H2-, HDand D,-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,, HD, and D,, respectively.

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