TY  - JOUR
AU  - Lorusso, G. et al
AU  - Montaner-Piza, A.
PY  - 2015
DA  - 2015//
TI  - 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
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 192501
EP  - 7pp
VL  - 114
IS  - 19
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - https://doi.org/10.1103/PhysRevLett.114.192501
DO  - 10.1103/PhysRevLett.114.192501
LA  - English
N1  - WOS:000354347300001
ID  - Lorusso+Montaner-Piza2015
ER  -