The Influence Of Neutron Capture Rates On The Rare Earth Region Of The r-Process Abundance Pattern

Abstract

We study the sensitivity of the r-process abundance pattern to neutron capture rates along the rare earth region (A~150 to A~180). We introduce the concepts of large nuclear flow and flow saturation which determine the neutron capture rates that are influential in setting the rare earth abundances. We illustrate the value of the two concepts by considering high entropy conditions favorable for rare earth peak production and identifying important neutron capture rates among the rare earth isotopes. We also show how these rates influence nuclear flow and specific sections of the abundance pattern.

14 pages, 7 figures, submitted to PRC

References in corpus (16)

• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Near-UV Observations of HD221170: New Insights into the Nature of r-Process-Rich Stars
• Nucleosynthesis-relevant conditions in neutrino-driven supernova outflows. I. Spherically symmetric hydrodynamic simulations
• Dynamical r-process studies within the neutrino-driven wind scenario and its sensitivity to the nuclear physics input
• Half-lives and branchings for β-delayed neutron emission for neutron-rich Co-Cu isotopes in the r-process
• Supernova Fallback: A Possible Site for the r-Process
• Formation Of The Rare Earth Peak: Gaining Insight Into Late-Time r-Process Dynamics
• On the Dynamics of Proto-Neutron Star Winds and r-Process Nucleosynthesis
• Mass measurements beyond the major r-process waiting point 80Zn
• Cold r-Process in Neutrino-Driven Winds
• Beta-decay of nuclei around Se-90. Search for signatures of a N=56 sub-shell closure relevant the r-process
• r-Process Nucleosynthesis in Shocked Surface Layers of O-Ne-Mg Cores
• Neutron capture on 130Sn during r-process freeze-out
• Neutron Capture in the r-Process -- Do We Know Them And Does It Make Any Difference?
• TOF-Brho Mass Measurements of Very Exotic Nuclides for Astrophysical Calculations at the NSCL
• Mass measurements of neutron-rich nuclei at JYFLTRAP

Cited by in corpus (21)

• The impact of individual nuclear properties on $r$-process nucleosynthesis
• The Origin of r-Process Elements in the Milky Way
• Current Status of r-Process Nucleosynthesis
• The impact of individual nuclear masses on $r$-process abundances
• Formation Of The Rare Earth Peak: Gaining Insight Into Late-Time r-Process Dynamics
• Novel Techniques for Constraining Neutron-Capture Rates Relevant for r-Process Heavy-Element Nucleosynthesis
• Estimation of M1 scissors mode strength for deformed nuclei in the medium to heavy mass region by statistical Hauser-Feshbach model calculations
• Beta decay of deformed r-process nuclei near A = 80 and A= 160, including odd-A and odd-odd nuclei, with the Skyrme finite-amplitude method
• Microscopic optical potential for exotic isotopes from chiral effective field theory
• Reverse engineering nuclear properties from rare earth abundances in the $r$ process
• ${}^{60}$Fe in core-collapse supernovae and prospects for X-ray and $\gamma$-ray detection in supernova remnants
• Impact of new data for neutron-rich heavy nuclei on theoretical models for $r$-process nucleosynthesis
• Sensitivity studies for r-process nucleosynthesis in three astrophysical scenarios
• The link between rare earth peak formation and the astrophysical site of the $r$ process
• The ORNL Analysis Technique for Extracting $\beta$-Delayed Multi-Neutron Branching Ratios with BRIKEN
• r-Process Nucleosynthesis and Radioactively Powered Transients from Magnetar Giant Flares
• Impact of level densities and $\gamma$-strength functions on $r$-process simulations
• Probing the N=104 midshell region for the r process via precision mass spectrometry of neutron-rich rare-earth isotopes with the JYFLTRAP double Penning trap
• Impact of nuclear mass models on $r$-process nucleosynthesis and heavy element abundances in $r$-process enhanced metal-poor stars
• Capture Rates of Highly Degenerate Neutrons
• Sensitivity of Neutron-Rich Nuclear Isomer Behavior to Uncertainties in Direct Transitions