Decay properties of neutron-rich 74Co and predictions for 78Co*

Experimental studies of doubly magic 78Ni are needed to provide critical data to test the robustness of the nuclear shell structure and model r-process. One of the best ways to investigate the shell structure of 78Ni is the decay of 78Co. While presently it is not possible to produce 78Co with sufficient rates, the decay measurements will be an essential study with new facilities and beam intensity upgrades. We measured the beta-decay properties of 74Co using fragmentation reaction at NSCL. Combining this result and other existing data around 78Ni enabled us to make predictions for the decay properties of 78Co. The half-life and beta-delayed neutron emission probability predicted by shell-model calculations will be presented for the chain of odd-odd cobalt isotopes.