Abstract
Alpha energy spectra and angular distribution have been measured for the reaction 120 MeV $^{30}\mathrm{Si}$${+}^{30}$Si 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.
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