Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-07-10
PoSNIC-IX:040,2006
Physics
Nuclear Physics
Nuclear Theory
Invited talk presented at the conference "Nuclei in the Cosmos IX", CERN, Switzerland, 25-30 June 2006
Scientific paper
Precise nuclear reaction rates are needed for a detailed description of the production of elements in primordial nucleosynthesis and during the hydrostatic burning of stars to constrain the astrophysical models. The relevant reactions are extremely difficult to measure directly in the laboratory at the small astrophysical energies. In recent years direct reactions methods have been developed and applied to extract low-energy astrophysical S factors. The application of these methods requires a combination of experimental and theoretical efforts. This contribution focuses on the underlying reaction theories that have to be well understood in order to assess the precision and limitations of the various approaches.
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