Half-life of Zn-80 - The first measurement for an r-process waiting-point nucleus

Details Half-life of Zn-80 - The first measurement for an r-process waiting-point nucleus Half-life of Zn-80 - The first measurement for an r-process waiting-point nucleus

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..56.1874g&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 56, April 28, 1986, p. 1874-1877.

Physics

24

Half Life, Heavy Nuclei, Nuclear Fusion, Radioactive Decay, Stellar Physics, Zinc Isotopes, Fission Products, Gallium Isotopes, Gamma Ray Spectra, Neutron Physics, Nuclear Capture, Nuclear Structure

Scientific paper

The first measurement of beta decay in Zn-80, a critical N = 50 waiting-point nucleus in the evaluation of different models of r-process environments and exposure times, is reported. Using the TRISTAN mass separator on line to the Brookhaven high-flux beam reactor, a half-life of 0.55 + or - 0.02 was measured for the neutron-rich fission product nucleus Zn-80(50). A Q-beta value for the decay of Zn-80 of 7.15 + or - 0.15 MeV, and a decay scheme for Zn-80 comprising low-lying levels and prominent gamma rays in Ga-80, are also deduced. A mass excess of -52.28 + or - 0.46 MeV is obtained for Zn-80.

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