%0 Journal Article
%T beta-Decay Half-Lives of 110 Neutron-Rich Nuclei across the N=82 Shell Gap: Implications for the Mechanism and Universality of the Astrophysical r Process
%A Lorusso, G. et al
%A Montaner-Piza, A.
%J Physical Review Letters
%D 2015
%V 114
%N 19
%I Amer Physical Soc
%@ 0031-9007
%G English
%F Lorusso+Montaner-Piza2015
%O WOS:000354347300001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2224), last updated on Fri, 29 May 2015 17:22:34 +0000
%X The beta-decay half-lives of 110 neutron-rich isotopes of the elements from 37 Rb to 50 Sn were measured at the Radioactive Isotope Beam Factory. The 40 new half-lives follow robust systematics and highlight the persistence of shell effects. The new data have direct implications for r-process calculations and reinforce the notion that the second (A approximate to 130) and the rare-earth-element (A approximate to 160) abundance peaks may result from the freeze-out of an (n, gamma) reversible arrow (gamma, n) equilibrium. In such an equilibrium, the new half-lives are important factors determining the abundance of rare-earth elements, and allow for a more reliable discussion of the r process universality. It is anticipated that universality may not extend to the elements Sn, Sb, I, and Cs, making the detection of these elements in metal-poor stars of the utmost importance to determine the exact conditions of individual r-process events.
%R 10.1103/PhysRevLett.114.192501
%U https://doi.org/10.1103/PhysRevLett.114.192501
%P 192501-7pp