$\beta$-decay half-lives of neutron-rich nuclei and matter flow in the   $r$-process
  The $\beta$-decay half-lives of neutron-rich nuclei with $20 \leqslant Z \leqslant 50$ 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 $\beta$-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 $A \gtrsim 140$, an important result for the understanding of the origin of heavy elements in the universe. 
Z. M. Niu, Y. F. Niu, H. Z. Liang, W. H. Long, T. Nik\v{s}i\'c, D.   Vretenar, and J. Meng
nucl-th astro-ph.SR nucl-ex