TY  - JOUR
AU  - Morales, A. I.
AU  - Algora, A.
AU  - Molina, F.
AU  - Rubio, B.
PY  - 2014
DA  - 2014//
TI  - Half-Life Systematics across the N=126 Shell Closure: Role of First-Forbidden Transitions in the beta Decay of Heavy Neutron-Rich Nuclei
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 022702
EP  - 5pp
VL  - 113
IS  - 2
PB  - Amer Physical Soc
AB  - 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 "stopped beam" 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.
SN  - 0031-9007
UR  - https://doi.org/10.1103/PhysRevLett.113.022702
DO  - 10.1103/PhysRevLett.113.022702
LA  - English
N1  - WOS:000341315100007
ID  - Morales_etal2014
ER  -