Systematics of rotational bands withK=0 in odd-odd nuclei
An empirical rule for the sign of the Newby shifts inK=0 rotational bands from purej-shells is proposed. An examination of 42 experimentalK=0 bands demonstrates the usefulness of this rule. A fit of the parameters in the residual neutron-proton interaction to the experimental Newby shifts shows the importance of the space exchange term for a good description of the Newby shifts.