# Spin of cobalt-60

At many places in beta decay of cobalt-60, the ground state spin of the isotope is given as 5+. However that's not what is predicted by shell model and applying nordheim's strong rule. Is the data given purely experimental in such cases and outside purview of shell-model? Similarly, daughter nucleus Ni has 4+ spin-parity. Is there a theoretical way to determine the nuclear spins in ground state?

• – Ben Crowell Jul 5 at 21:55