Oblate deformed shapes of hot rotating nuclei deduced from giant-dipole-resonance decay studies

Abstract
The spectrum shape and the angular distribution of γ rays from highly excited and rotating Zr90 and Mo92 compound nuclei were measured and analyzed. The results are in good agreement with theory including both intrinsic-shape fluctuations and shape-orientation fluctuations about an equilibrium shape which changes from spherical to oblate deformed with increasing spin.