Desorption of H atoms from graphite (0001) using XUV free electron laser pulses

B. Siemer, Thomas Olsen, T. Hoger, M. Rutkowski, C. Thewes, S. Dusterer, Jakob Schiøtz, H. Zacharias

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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.
Original languageEnglish
JournalChemical Physics Letters
Volume500
Issue number4-6
Pages (from-to)291-294
ISSN0009-2614
DOIs
Publication statusPublished - 2010

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