Seminars Archive
Photoelectron spectroscopy of metal clusters
Abstract
Tuesday, July 19, 2005, 10:00
Seminar Room
Sincrotrone Trieste, Basovizza
Photoelectron spectroscopy of metal clusters
Bernd von Issendorff
(Physikalisches Institut, Universitt Freiburg)
Abstract
One of the most powerful tools to study the properties of free size
selected metal clusters is photoelectron spectroscopy, which in principle
allows the direct imaging of the electronic density of states.
A wealth of effects can be studied: for simple metal clusters, e.g.,
one observes the highly discretized electron shell structure; in the case
of more complex metals like the transition metals the hybridization of
s- and d-band can be followed. In both cases the comparison with calculated
spectra allows the determination of geometric structure. For divalent metals
a nonmetal-metal transition as a function of size can be observed. Finally,
time resolved photoelectron spectroscopy applying femtosecond laser pulses
can be used to study ultrafast relaxation processes. Some examples of recent
results will be discussed.
