Role of corrugation in molecule—surface interaction: flow experiments using the LiF(001) surface in two orientations
✍ Scribed by R. Horne; L.J.F. Hermans
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 448 KB
- Volume
- 179
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Received2 January1991
The role of surface corr&ation in mole&e-surface interaction is studied in Knudsen flow of H,, HD and N, along LiF(OO1) surfaces under different azimuth angles. This is achieved by measuring, for each angle, the productjon of rotational polarization, using the effect of a magnetic field on the flow. The corrugated surface structure is found to manifest itself most strongly for Hz, where the results arc in qualitative agreement with quantum-mechanical model calculations by Levi and Tarditi. Corrugation is found to be much less important for HD and Nz. This is explained in terms of a different effective molecule-phonon interaction range for different magnitudes of the rotational level splitting.