@Article{Morales_etal2014, author="Morales, A. I. and Algora, A. and Molina, F. and Rubio, B.", title="Half-Life Systematics across the N=126 Shell Closure: Role of First-Forbidden Transitions in the beta Decay of Heavy Neutron-Rich Nuclei", journal="Physical Review Letters", year="2014", publisher="Amer Physical Soc", volume="113", number="2", pages="022702--5pp", abstract="This Letter reports on a systematic study of beta-decay half-lives of neutron-rich nuclei around doubly magic Pb-208. The lifetimes of the 126-neutron shell isotone Pt-204 and the neighboring Ir200-202, Pt-203, Au-204 are presented together with other 19 half-lives measured during the {\textquoteleft}{\textquoteleft}stopped beam{\textquoteright}{\textquoteright} campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden beta strength reveal significant deviations for most of the nuclei with N < 126. In contrast, theories including a fully microscopic treatment of allowed and first-forbidden transitions reproduce more satisfactorily the trend in the measured half-lives for the nuclei in this region, where the r-process pathway passes through during beta decay back to stability.", optnote="WOS:000341315100007", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1913), last updated on Mon, 29 Sep 2014 17:18:55 +0000", issn="0031-9007", doi="10.1103/PhysRevLett.113.022702", opturl="https://doi.org/10.1103/PhysRevLett.113.022702", language="English" }