We point out the existence of ground-state rotational bands with identical transition energies (up to spin 8ħ) in , , , and . The corresponding transitions in the ground-state bands of and have identical energies (within ∼2 keV) up to spin 24ħ. These features are very similar to those recently observed for superdeformed bands in the mass-150 and mass-190 regions and suggest that the phenomenon of identical bands is not restricted to superdeformed bands.
- Received 5 April 1991
- Published in the issue dated September 1991
© 1991 The American Physical Society