Constraining the EoS of neutron-rich matter by studying giant resonances
by
Prof.Attila Krasznahorkay(Hungarian Academy of Sciences (MTA-Atomki))
→
Asia/Tokyo
RIBF Bldg. 2F Coference Hall (RIKEN Wako)
RIBF Bldg. 2F Coference Hall
RIKEN Wako
Description
At the recent radioactive beam facilities an important issue is the size of the neutron skin of unstable nuclei. By measuring it precisely one may constrain the symmetry energy term of the nuclear equation of state (EoS). The precise knowledge of the symmetry energy is essential not only for describing the structure of neutron rich nuclei, but also for describing of the properties of the neutron-rich matter in nuclear astrophysics. After a short overview of the presently used methods I will present a novel method to determine the neutron-skin thickness of nuclei using the charge-exchange anti-analog giant dipole resonance (AGDR). Calculations have been performed using the relativistic proton–neutron quasiparticle random-phase approximation (pn-RQRPA). It is shown that the excitation energies of the AGDR, supplemented with the experimental values, provide a stringent constraint on value of the neutron-skin thickness. I will also give an overview of our recent experimental results obtained at GSI using relativistic heavy ion beams in inverse kinematic and also some results obtained in normal kinematics using the 208Pb(p,nγp)207Pb reaction. I will finish my talk by sketching our future plans at RIKEN for measuring neutron-skin thicknesses.
