β-Decay Half-Lives of Very Neutron-Rich Kr to Tc Isotopes on the Boundary of the r-Process Path: An Indication of Fast r-Matter Flow

Details β-Decay Half-Lives of Very Neutron-Rich Kr to Tc Isotopes on the Boundary of the r-Process Path: An Indication of Fast r-Matter Flow β-Decay Half-Lives of Very Neutron-Rich Kr to Tc Isotopes on the Boundary of the r-Process Path: An Indication of Fast r-Matter Flow

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011phrvl.106e2502n&link_type=abstract

Physical Review Letters, vol. 106, Issue 5, id. 052502

Physics

10

Beta Decay, Double Beta Decay, Electron And Muon Capture, Lifetimes, R-Process, 90<=A<=149

Scientific paper

The β-decay half-lives of 38 neutron-rich isotopes from Kr36 to Tc43 have been measured; the half-lives of Kr100, Sr103-105, Y106-108, Zr108-110, Nb111,112, Mo112-115, and Tc116,117 are reported here. The results when compared with previous standard models indicate an overestimation in the predicted half-lives by a factor of 2 or more in the A≈110 region. A revised model based on the second generation gross theory of β decay better predicts the measured half-lives and suggests a more rapid flow of the rapid neutron-capture process (r-matter flow) through this region than previously predicted.

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