Impact of new data for neutron-rich heavy nuclei on theoretical models for $r$-process nucleosynthesis

Abstract

Current models for the $r$ process are summarized with an emphasis on the key constraints from both nuclear physics measurements and astronomical observations. In particular, we analyze the importance of nuclear physics input such as beta-decay rates; nuclear masses; neutron-capture cross sections; beta-delayed neutron emission; probability of spontaneous fission, beta- and neutron-induced fission, fission fragment mass distributions; neutrino-induced reaction cross sections, etc. We highlight the effects on models for $r$-process nucleosynthesis of newly measured $\beta$-decay half-lives, masses, and spectroscopy of neutron-rich nuclei near the $r$-process path. We overview r-process nucleosynthesis in the neutrino driven wind above the proto-neutron star in core collapse supernovae along with the possibility of magneto-hydrodynamic jets from rotating supernova explosion models. We also consider the possibility of neutron star mergers as an r-process environment. A key outcome of newly measured nuclear properties far from stability is the degree of shell quenching for neutron rich isotopes near the closed neutron shells. This leads to important constraints on the sites for $r$-process nucleosynthesis in which freezeout occurs on a rapid timescale.

24 pages, 7 figures

References in corpus (29)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. XII: Stiffness and stability of neutron-star matter
• Magnetorotationally driven Supernovae as the origin of early galaxy $r$-process elements?
• R-process enrichment from a single event in an ancient dwarf galaxy
• The Macronova in GRB 050709 and the GRB/macronova connection
• Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. IX: Constraint of pairing force to ${}^1{S}_0$ neutron-matter gap
• Detailed Chemical Abundances in the r-Process-Rich Ultra-Faint Dwarf Galaxy Reticulum 2
• Special Relativistic Simulations of Magnetically-dominated Jets in Collapsing Massive Stars
• Disk-Jet Coupling in Black Hole Accretion Systems I: General Relativistic Magnetohydrodynamical Models
• "Meissner effect" and Blandford-Znajek mechanism in conductive black hole magnetospheres
• 3D Relativistic Magnetohydrodynamic Simulations of Magnetized Spine-Sheath Relativistic Jets
• Stellar explosions powered by the Blandford-Znajek mechanism
• Impact of nuclear mass uncertainties on the $r$-process
• Axisymmetric simulations of magnetorotational core collapse: Approximate inclusion of general relativistic effects
• Half-lives and branchings for β-delayed neutron emission for neutron-rich Co-Cu isotopes in the r-process
• Numerical Study on GRB-Jet Formation in Collapsars
• Nucleosynthesis in Magnetically Driven Jets from Collapsars
• Precision Mass Measurements of 129-131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process
• Nine New Metal-Poor Stars on the Subgiant and Red Horizontal Branches with High Levels of r-process Enhancement
• Heavy element nucleosynthesis in a collapsar
• Magnetohydrodynamic Simulations of A Rotating Massive Star Collapsing to A Black Hole
• A Suprime-Cam study of the stellar population of Ursa Major I dwarf spheroidal galaxy
• Long-Term Evolution of Slowly Rotating Collapsar in Special Relativistic Magnetohydrodynamics
• A high-entropy wind r-process study based on nuclear-structure quantities from the new finite-range droplet model FRDM(2012)
• Impact of New beta-decay Half-lives on r-process Nucleosynthesis
• Explosive Nucleosynthesis in Magnetohydrodynamical Jets from Collapsars II. Heavy-Element Nucleosynthesis of s, r, p-Processes
• Dust formation in macronovae

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• On the Origin of the Early Solar System Radioactivities. Problems with the AGB and Massive Star Scenarios
• Nuclear processes in Astrophysics: Recent progress
• Properties of 187Ta revealed through isomeric decay
• Calculation of $\beta$-decay half-lives with Skyrme Hartree-Fock-Bogoliubov+$pn$-QRPA and isoscalar pairing strengths optimized by a Bayesian method
• Isochronic evolution and the radioactive decay of r-process nuclei
• Sandblasting the $\text{r}$-Process: Spallation of Ejecta from Neutron Star Mergers
• Progress in Nuclear Astrophysics of East and Southeast Asia
• A systematic study of the ground state properties of W, Os and Pt isotopes using HFB theory
• Production of neptunium and plutonium nuclides from uranium carbide using 1.4-GeV protons
• High-precision mass measurements of the ground and isomeric states in ${}^{124,125}$Ag
• Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances
• Spallation of r-Process Nuclei Ejected from a Neutron Star Merger