beta decay of the proton-rich T-z=-1/2 nucleus, Kr-71
Oinonen, M × Jokinen, A Aysto, J Baumann, P Didierjean, F Honkanen, A Huck, A Huyse, Marc Knipper, A Marguier, G Novikov, Y Popov, A Ramdhane, M Seliverstov, DM Van Duppen, Piet Walter, G #
American physical soc
Physical Review C vol:56 issue:2 pages:745-752
beta decay of the T-z=-1/2 nuclide Kr-71 has been studied at the ISOLDE PSB Facility at CERN. Kr-71 ions were produced in spallation reactions in a Nb foil using the 1 GeV proton beam and studied by means of beta-delayed proton, beta- and gamma-ray spectroscopy. The half-life and the beta-decay energy of Kr-71 were determined using the decay of protons and positrons. These results: T-1/2=100+/-3 ms and Q(EC)=10.14+/-0.32 MeV and the first observation of the beta branch to the 207 keV level in Br-71 makes the extension of the systematics of Gamow-Teller matrix elements of mirror nuclei up to A=71 possible. The Gamow-Teller strength of the same magnitude as that of the fp-shell mirror nuclei is observed for the ground-state transition.