Nuclear Physics in Astrophysics II
Recent astrophysical studies with exotic beams at ORNL
Physics Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
Accepted: 20 December 2005
Published online: 28 February 2006
The availability of exotic beams has produced great opportunities for advances in our understanding of the nucleosynthesis occurring in stellar burning and stellar explosions such as novae, X-ray bursts, and supernovae. In these extreme environments, synthesized radioactive nuclei can undergo subsequent nuclear processing before they decay, and thus to understand these events, we must understand reaction rates involving radioactive nuclei. At the ORNL Holifield Radioactive Ion Beam Facility (HRIBF), we have made a number of measurements using proton-rich beams such as 18F and 7Be and neutron-rich beams such as 82Ge and 84Se that help clarify the structure of astrophysically-important nuclei. We are also poised to begin studies with doubly-magic 132Sn. The experimental methods and results are discussed.
PACS: 25.60.-t Reactions induced by unstable nuclei – / 26.30.+k Nucleosynthesis in novae, supernovae and other explosive environments –
© Società Italiana di Fisica and Springer-Verlag, 2006