O2 photodesorption from a Ag8O- 2 cluster

Koyasu, Kiichirou; Niemietz, Marco; Westhäuser, Wilko; Ganteför, Gerd

O2 photodesorption from a Ag8O- 2 cluster

Files

EurphysjouD53.pdf(234.95 KB)

Date

2009

Authors

Koyasu, Kiichirou

Niemietz, Marco

Westhäuser, Wilko

Ganteför, Gerd

Publication type

Journal article

Published in

European Physical Journal / D ; 53 (2009). - pp. 59-62

Abstract

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.

Subject (DDC)

530 Physics

Cite This

ISO 690

KOYASU, Kiichirou, Marco NIEMIETZ, Wilko WESTHÄUSER, Gerd GANTEFÖR, 2009. O2 photodesorption from a Ag8O- 2 cluster. In: European Physical Journal / D. 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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