Dedicated to Prof. Wolfgang Eisenmenger on the occasion of his 65th birthday.
- Autor(in)
- Referenz
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15 δ α is not the total absorption but only its change during the experiment
17 A low gas temperature is essential for the quench condensation. The influence of the gas temperature on the annealing process will be discussed in a separate publication. For a theoretical investigation of the role of kinetic energy of the incident particles for film growth see, e.g., K. H. Müller, Surf. Sci. 184 (1987) L375
1 see for a review: I. S. Silvera, Rev. Mod. Phys. 52 (1980) 393
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22 J. Classen, K. Eschenröder, G. Weiss, in preparation
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24 M. Maruyama, M. Bienfait, F. C. Liu, Y. M. Liu, O. E. Vilches, F. Rieutord, Surf. Sci. 283 (1993) 333
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4 All energies E will be referred to in K, i.e., in units of E/kB
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- Seitenbereich
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0001 - 0008
- Schlagwort(e)
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<KWD>Solid hydrogen
Surface acoustic waves
Surface diffusion
Thin films
- Zusammenfsg.
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The annealing behaviour of quench condensed H<sub>2</sub>-, HD- and D<sub>2</sub>-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<sub>2</sub>, HD, and D<sub>2</sub>, respectively.
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