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.