The fission probability has been measured in the Pu-239(d, pf)Pu-240 reacti
on as a function of the excitation energy. A new resonance group was found
in the excitation energy region of 4.4-4.8 MeV and was interpreted as super
deformed rotational bands with an observed rotational parameters of (h) ove
r bar(2)/2 Theta = 3.2 keV corresponding to the superdeformed nuclear shape
.