Desorption of H atoms from graphite (0 0 0 1) using XUV free electron laser pulses

[Display omitted] ► XUV induced desorption of neutral hydrogen. ► Velocity distribution at extremely low kinetic energies. ► DFT-based electron scattering calculation. ► Identifying adsorbate sites. The desorption of neutral H atoms from graphite with femtosecond XUV pulses is reported. The velocity...

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Bibliographic Details
Published in:Chemical physics letters 2010-11, Vol.500 (4), p.291-294
Main Authors: Siemer, B., Olsen, T., Hoger, T., Rutkowski, M., Thewes, C., Düsterer, S., Schiøtz, J., Zacharias, H.
Format: Article
Language:English
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Summary:[Display omitted] ► XUV induced desorption of neutral hydrogen. ► Velocity distribution at extremely low kinetic energies. ► DFT-based electron scattering calculation. ► Identifying adsorbate sites. The desorption of neutral H atoms from graphite with femtosecond XUV pulses is reported. The velocity distribution of the atoms peaks at extremely low kinetic energies. A DFT-based electron scattering calculation traces this distribution to desorption out of specific adsorption sites on graphite, and identifies the highest vibrational state in the adsorbate potential as a major source for the slow atoms. It is evident that multiple electron scattering processes are required for this desorption. A direct electronic excitation of a repulsive hydrogen–carbon bond seems not to be important.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2010.10.040