β-decay half-lives of neutron-rich nuclei and matter flow in the r-process

2012/10/31 by Zhong-Ming Niu, Z. M. Niu, Y. F. Niu +10 · 1 citation
Physics and Astronomy · #Astronomical and nuclear sciences #Atomic physics #Double beta decay #Isoscalar #Neutrino #Neutron #Nuclear matter #Nuclear physics #Nuclear physics research studies #Nuclear reaction #Nucleon #Nucleosynthesis #Pairing #Particle physics #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quasiparticle #Random phase approximation #astro-ph.SR #nucl-ex #nucl-th #r-process

paper · pdf · doi:10.1016/j.physletb.2013.04.048

published as Phys. Lett. B 723, 172-176 (2013) · 14 pages, 4 figures

openalex publication_date 2013/04/27 · arxiv created 2013/05/24 · arxiv updated 2013/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The β-decay half-lives of neutron-rich nuclei with 20≤Z≤50 are systematically investigated using the newly developed fully self-consistent proton–neutron quasiparticle random phase approximation (QRPA), based on the spherical relativistic Hartree–Fock–Bogoliubov (RHFB) framework. Available data are reproduced by including an isospin-dependent proton–neutron pairing interaction in the isoscalar channel of the RHFB + QRPA model. With the calculated β-decay half-lives of neutron-rich nuclei a remarkable speeding up of r-matter flow is predicted. This leads to enhanced r-process abundances of elements with A≳140, an important result for the understanding of the origin of heavy elements in the universe.

Citations

• Deformation of theN=ZNucleusSr<mml:mprescripts/><mml:none/>76usingβ-Decay Studies
• Nuclear weak-interaction processes in stars
• Relativistic Nuclear Energy Density Functionals: Mean-Field and Beyond
• Microscopic analysis of collective dynamics in low energy fission
• Application of the relativistic mean-field mass model to ther-process and the influence of mass uncertainties
• Synthesis of the Elements in Stars
• Calculation of β-decay rates in a relativistic model with momentum-dependent self-energies
• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• Masses, Deformations and Charge Radii--Nuclear Ground-State Properties in the Relativistic Mean Field Model
• Half-Life of the Doubly Magicr-Process NucleusN<mml:mprescripts/><mml:none/>78i
• Experimental Test of Parity Conservation in Beta Decay
• Versuch einer Theorie der ?-Strahlen. I

Cited by

• New high-spin structure and possible chirality in In<mml:mprescripts/><mml:none/>109