Neutron Capture in the r-Process -- Do We Know Them And Does It Make Any Difference?

Details Neutron Capture in the r-Process -- Do We Know Them And Does It Make Any Difference? Neutron Capture in the r-Process -- Do We Know Them And Does It Make Any Difference?

2004-07-16

arxiv.org/abs/astro-ph/0407326v1

Nucl.Phys. A758 (2005) 655

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures; contribution to Nuclei In The Cosmos VIII, to appear in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2005.05.160

The r-process involves neutron-rich nuclei far off stability for which no experimental cross sections are known. Therefore, one has to rely on theory which might be prone to considerable uncertainties far off stability. To investigate the impact of such uncertainties, nucleosynthesis in hot bubble models followed completely from high-temperature NSE to low-temperature neutron capture freeze-out were calculated with largely varied rates. Due to the (n,gamma)-(gamma,n) equilibrium established at the onset of the r-process, only late-time neutron captures are important which mainly modify the abundances around the third r-process peak.

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