Review: Rare isotopes experiments at FAIR

Tom Auman gave a very exciting talk about the status of rare isotopes experiments at FAIR and I will post some topics that I could remember.

FAIR is a project that will start next year in GSI and will enable new experiments to measure giant resonances in rare isotopes. In particular, experiments to measure the giant quadrupole resonances of rare isotopes that have not been done so far, will be studied by systematic apha scattering. The nucleus is excited by the absorption of virtual photons of the strong electric field of a heavy nucleus and the determination of the photon energy (excitation energy) is done via the measurement of the complete kinematics of the outgoing particles event by event.

He showed the experiment setup at GSI including the LAND (large area neutron detector with a high efficiency of ~90% at 600 MeV) and ALADIN (large acceptance dipole). This new setup will provide measurements of excitation energies with resolution of 20keV.

He showed results for the dipole strenght distribution in neutron rich Sn isotopes and pointed out that limitations in the experiment come from the maximum charge limit in the storage ring (ESR). He comment that beam intensities will be less than in MSU but the energies will be larger.