Nuclear Astrophysics at FAIR

Physics – Nuclear Physics

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Nuclear Fragmentation, Isotopes, Beta-Rays, Ion Sources, Atomic Collisions, Projectile And Target Fragmentation, Isotope Separation And Enrichment, Weak-Interaction And Lepton Aspects, Ion Sources: Polarized, Elastic And Inelastic Scattering

Scientific paper

An overview about the future international Facility for Antiproton and Ion Research -FAIR- is given, with especial emphasis on the astrophysical aspects of the NUSTAR (NUclear StrucTure, Astrophysics and Reactions) project. Many types of astrophysically relevant experiments will be performed at NUSTAR. A common tool in all of them will be the large acceptance superconducting in-flight fragment separator (Super-FRS). Rare isotopes of all elements up to Uranium will be produced and spatially separated, thus allowing for the study of very short-lived nuclei. At the low energy branch of the SuperFRS the DESPEC-setup will allow for precise β-decay measurements, including neutron emission probabilities, and for the study of the nuclear structure of very exotic species. High precision Penning trap mass measurements will be carried out with the MATS setup installed at the low-energy branch. Large scale mass measurements will be performed using a complex of storage and cooler rings, the NESR and the CR. In summary, a vast amount of new data far off stability will become available. This will be particularly interesting for the study of explosive nucleosynthesis events, like the rapid neutron capture and the rapid proton capture processes. At the high-energy branch of the SuperFRS, the R3B setup will provide access to a large variety of kinematically complete measurements at relativistic energies, such as heavy ion induced electromagnetic excitation, knockout and breakup reactions or light-ion (in)elastic scattering in inverse kinematics. This will enable e.g. to study Gamow-Teller strengths or to determine astrophysical S-factors on exotic nuclei.

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