Physics – Nuclear Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003omeg.conf..149s&link_type=abstract
ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2000. Proceedings of the International Symposium. Held 19-21 January 2000 in Universi
Physics
Nuclear Physics
Scientific paper
Measurements of nuclear reactions on radioactive isotopes are necessary to understand stellar explosions such as novae and X-ray bursts. We have recently measured the 17F(p,p)17F, 17F(p,α)14O, 18F(p,p)18F, and 18F(p,α)15O excitation functions with beams of radioactive ions produced at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory. Our experimental setup includes a Silicon Detector Array and the Daresbury Recoil Separator coupled to a windowless, differentially-pumped hydrogen gas target system. We have also measured the 12C(p,γ)13N cross section to commission our recoil separator for proton capture reactions on radioactive isotopes. To support these measurements, we are making unique calculations of isotope synthesis in stellar explosions to determine the effect of nuclear physics uncertainties on explosion model predictions. We are also making detailed evaluations of some nuclear reactions rates that are important input for explosion models.
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