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

Abstract

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.

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

References in corpus (4)

• Astrophysical Reaction Rates From Statistical Model Calculations
• Nuclear Level Density and the Determination of Thermonuclear Rates for Astrophysics
• Microscopic HFB+QRPA predictions of dipole strength for astrophysics applications
• Changes in r-process abundances at late times

Cited by in corpus (9)

• Neutron Reactions in Astrophysics
• Dynamical r-process studies within the neutrino-driven wind scenario and its sensitivity to the nuclear physics input
• The Influence Of Neutron Capture Rates On The Rare Earth Region Of The r-Process Abundance Pattern
• Neutron Capture Rates near A=130 which Effect a Global Change to the r-Process Abundance Distribution
• Large-scale prediction of the parity distribution in the nuclear level density and application to astrophysical reaction rates
• Challenges in nucleosynthesis of trans-iron elements
• Neutron capture on 130Sn during r-process freeze-out
• General properties of astrophysical reaction rates in explosive nucleosynthesis
• Stellar neutron capture reactions at low and high temperature