| M. Sawicka, I. Matea, H. Grawe, R. Grzywacz,
M. Pfützner, M. Lewitowicz, J. M. Daugas,
B. A. Brown, A. Lisetskiy, F. Becker,
G. Bélier, C. Bingham, R. Borcea, E. Bouchez,
A. Buta, E. Dragulescu, G. de France,
G. Georgiev, J. Giovinazzo, F. Hammache,
F. Ibrahim, P. Mayet, V. Méot, F. Negoita,
F. de Oliveira Santos, O. Perru, O. Roig,
K. Rykaczewski, M. G. Saint-Laurent,
J. E. Sauvestre, O. Sorlin, M. Stanoiu,
I. Stefan, C. Stodel, Ch. Theisen,
D. Verney and J. Zylicz
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A decay spectroscopy study of the neutron-rich cobalt isotopes has been performed using fragmentation of a 86Kr36+ beam and the new LISE2000 spectrometer at GANIL. For 71Co and 73Co, the beta-delayed gamma radiation has been observed for the first time, and the half-lives were found to be 79(5) ms and 41(4) ms, respectively. Features of the decay are discussed qualitatively in terms of nuclear models.
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