## Abstract

The rapid neutron nucleosynthesis process involves an enormous amount of very exotic neutron-rich nuclei, which represent a theoretical and experimental challenge. Two of the main decay properties that affect the final abundance distribution the most are half-lives and neutron branching ratios. Using fragmentation of a primary ^{238}U beam at GSI we were able to measure such properties for several neutron-rich nuclei from ^{208}Hg to ^{218}Pb. This contribution provides a short update on the status of the data analysis of this experiment, together with a compilation of the latest results published in this mass region, both experimental and theoretical. The impact of the uncertainties connected with the beta-decay rates and with beta-delayed neutron emission is illustrated on the basis of r-process network calculations. In order to obtain a reasonable reproduction of the third r-process peak, it is expected that both half-lives and neutron branching ratios are substantially smaller, than those based on FRDM+QRPA, commonly used in r-process model calculations. Further measurements around N ∼ 126 are required for a reliable modelling of the underlying nuclear structure, and for performing more realistic r-process abundance calculations.

Original language | English |
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Article number | 012045 |

Journal | Journal of Physics: Conference Series |

Volume | 665 |

Issue number | 1 |

DOIs | |

State | Published - Jan 5 2016 |

Event | 6th Nuclear Physics in Astrophysics, NPA 2013 - Lisbon, Portugal Duration: May 19 2013 → May 24 2013 |