Unexpected Large Deformations In Ni-60 Nuclei Produced In the Reaction 120 Mev Si-30+si-30

Alpha energy spectra and angular distribution have been measured for the reaction 120 MeV 30Si+30Si and compared to statistical model calculations. Emission from spherical nuclei cannot account for the shapes of the measured spectra. Reductions are required in both emission barrier and entrance channel spin. A simulation of alpha evaporation from deformed nuclei has been carried out using an equivalent one-step code. Average values of mass, charge, spin, and excitation energy of the emitter were evaluated by a multistep evaporative code. The very large deformation required to reproduce the experimental data agrees with previous results which have suggested a need for new physics in statistical models.