Berlin 2005 – wissenschaftliches Programm
SYPE 2.2: Hauptvortrag
Freitag, 4. März 2005, 17:00–17:30, HU Senatssaal
Time-dependent photoelectron spectroscopy — •Daniel Neumark — Department of Chemistry, University of California, Berkeley, CA 94720 USA
Time-resolved photoelectron imaging (TRPEI) is applied to the study of dynamics in size-selected anion clusters. Results will be presented for mercury and water cluster anions. In the mercury cluster experiments, TRPEI is used to follow relaxation dynamics subsequent to intraband excitation of the excess p-electron. In the water cluster anions, we show that internal and surface states can be selectively generated and measures size-dependent internal conversion lifetimes for the electronically excited "p" state in both types of clusters. Extrapolation of our results for the internal states supports the non-adiabatic relaxation model proposed for bulk hydrated electrons.