Ultrafast hot-electron dynamics observed in Pt-3(-) using time-resolved photoelectron spectroscopy

Authors
Pontius, N Bechthold, PS Neeb, M Eberhardt, W
Citation
N. Pontius et al., Ultrafast hot-electron dynamics observed in Pt-3(-) using time-resolved photoelectron spectroscopy, PHYS REV L, 84(6), 2000, pp. 1132-1135
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
84
Issue
6
Year of publication
2000
Pages
1132 - 1135
Database
ISI
SICI code
0031-9007(20000207)84:6<1132:UHDOIP>2.0.ZU;2-T
Abstract
Time-resolved two-photon photoelectron spectra have been measured for free P-3(-) using femtosecond pulses of 1.5 eV photon energy in a pump-probe con figuration. The time-dependent photoelectron distribution reveals a lifetim e of optically excited states of less than 70 fs. Such an unexpected fast e lectron relaxation in Pt-3(-) suggests the existence of inelastic electron- electron scattering processes in a triatomic cluster which result in a life time similar to those of bulk metals.