Triaxial Superdeformed Bands In Zr-86

Four new superdeformed bands have been found in the nucleus Zr-86. Th, good agreement between experiment and configuration-dependent shell correction calculations suggests that three of the bands have triaxial superdeformed shapes. Such unique features in mass A similar to 80 superdeformed bands have been predicted, but not observed experimentally until now. A fourth band in Zr-86 is interesting due to a fairly constant and unusually high dynamic moment of inertia. Possible interpretations of this structure are discussed.