Experimental
results
on the Coulomb excitation of exotic nuclei at the R3B-LAND
setup,
D. Rossi, GSI Darmstadt,
Germany − Coulomb
excitation is a powerful tool to investigate the collective
response of exotic
nuclei, providing a unique insight into the dynamical properties
of nuclei
located far from stability. The obtained experimental low-lying
dipole data
provides valuable information not only for the nuclear
equation-of-state
through the observation of the Pygmy Dipole Resonance (PDR), but
also for
nucleosynthesis scenarios, such as the rp-process.
Several experiments have been carried
out in the
past years using the R3B-LAND setup at GSI in Darmstadt, in which
the Coulomb
excitation of unstable nuclei has been investigated. The
systematic measurement
of a neutron-rich portion of the Sn isotopic chain has revealed
PDR strength
above the one-neutron threshold. The measured strength is used to
constrain the
asymmetry term of the nuclear equation-of-state, which has an
impact on the
behavior of not only exotic nuclei, but also on objects of
astrophysical
interest, such as neutron stars. Preliminary data from more recent
experiment
campaigns will be discussed, namely for neutron-rich Ni and
neutron-deficient
Ar isotopes. The goals of future experiments at the R3B setup will
be presented
as well, revealing a strategy to not only gain a deeper
understanding of the
PDR, but also to disentangle the dipole and quadrupole
contributions in exotic
nuclei.