Publikation:

O2 photodesorption from a Ag8O- 2 cluster

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EurphysjouD53.pdf
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2009

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Koyasu, Kiichirou
Niemietz, Marco
Westhäuser, Wilko

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-85851
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https://doi.org/10.1140/epjd/e2009-00059-y
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Physik: Publikationen
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Published

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European Physical Journal / D. 2009, 53, pp. 59-62. Available under: doi: 10.1140/epjd/e2009-00059-y

Zusammenfassung

The decay path of an Ag8(O2)− cluster photoexcited by a 3.1 eV photon is elucidated using time-resolved photoelectron spectroscopy. Photoabsorption results in the formation of an excited state giving rise to a peak in the photoelectron spectra with well-resolved vibrational finestructure. With a lifetime of about 100 fs this bound state decays into an anti-bonding state which dissociates into O2 and Ag− 8 on a timescale of 10 ps. In the photoelectron spectra, this corresponds to a broad maximum shifting gradually towards higher binding energy while the O2 and Ag− 8 separate. Finally, the spectrum of bare Ag− 8 appears. This process is unique to small clusters, because on metal surfaces excited state lifetimes are too short to allow for direct dissociation.

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530 Physik

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ISO 690KOYASU, Kiichirou, Marco NIEMIETZ, Wilko WESTHÄUSER, Gerd GANTEFÖR, 2009. O2 photodesorption from a Ag8O- 2 cluster. In: European Physical Journal / D. 2009, 53, pp. 59-62. Available under: doi: 10.1140/epjd/e2009-00059-y
BibTex
@article{Koyasu2009photo-9380,
  year={2009},
  doi={10.1140/epjd/e2009-00059-y},
  title={O2 photodesorption from a Ag8O- 2 cluster},
  volume={53},
  journal={European Physical Journal / D},
  pages={59--62},
  author={Koyasu, Kiichirou and Niemietz, Marco and Westhäuser, Wilko and Ganteför, Gerd}
}
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