Site Specificity in Femtosecond Laser Desorption of Neutral H Atoms from Graphite(0001)

R. Frigge, T. Hoger, B. Siemer, H. Witte, M. Silies, H Zacharias, Thomas Olsen, Jakob Schiøtz

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Abstract

Femtosecond laser excitation and density functional theory reveal site and vibrational state specificity in neutral atomic hydrogen desorption from graphite induced by multiple electronic transitions. Multimodal velocity distributions witness the participation of ortho and para pair states of chemisorbed hydrogen in the desorption process. Very slow velocities of 700 and 400  ms-1 for H and D atoms are associated with the desorption out of the highest vibrational state of a barrierless potential.
Original languageEnglish
JournalPhysical Review Letters
Volume104
Issue number25
Pages (from-to)256102
ISSN0031-9007
DOIs
Publication statusPublished - 2010

Bibliographical note

Copyright 2010 American Physical Society

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