Nuclear information needs for the astrophysical s-process

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Beta Particles, Neutrons, Nuclear Astrophysics, Nuclear Capture, Radioactive Decay, Nuclear Fusion, Nuclear Reactions, Positrons

Scientific paper

The astrophysical s process is a sequence of neutron capture and beta decay reactions on a slow time scale compared to beta decay lifetimes near the line of stability. We systematically study this detailed sequence of neutron capture, continuum and bound state beta decay, positron decay, and electron capture reactions that comprise the s process for a broad range of astrophysical environments. Our results are then compared with the solar system abundances of heavy elements to determine the range of physical conditions responsible for their nucleosynthesis. The nuclear data needs are extensive but have begun to be precise enough to allow for a consistent interpretation of the astrophysical site for the s process.

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