Neutron Excess in Atomic Nuclei
Prof. Dr. Alexandre Obertelli (TU Darmstadt Institut für Kernphysik)

Rare isotope facilities have given access to the neutron-rich side of the nuclear landscape. In this seminar, the recent results obtained at the RIBF, RIKEN, on the structure of the most neutron-rich nuclear systems studied so far, 4n and 28O, will be presented together with the challenges faced by ab initio theory. The neutron excess in neutron-rich nuclei develop as a neutron skin or halo at the nuclear surface. The extension of neutrons at the nuclear surface remains relatively unconstrained.

The new experiment PUMA (antiProton Unstable Matter Annihilation) at CERN aims at investigating the neutron to proton content of the nuclear density tail of stable and unstable nuclei by use of trapped antiprotons as a probe. The principle and status of the experiment will be given.