Shell Effects in Fission Fragment Anisotropies for ¹²C^194,198+Pt Systems

The fission fragment anisotropies for ¹²C+¹⁹⁸Pt populating ²¹⁰Po are found to be systematically higher than that for ¹²C+¹⁹⁴Pt, the difference decreasing over the energy range 1.0≤E/V_B≤1.4. The parameters required for a statistical model analysis of the data were constrained by fission cross section data and by measuring evaporation residue cross sections. While the measured anisotropies for ¹²C+¹⁹⁴Pt are in agreement with the saddle point model calculations, those for ¹²C+¹⁹⁸Pt are considerably larger. The data are suggestive of a significant shell effect in the anisotropies of fission fragments emitted from ²¹⁰Po with neutron magic number, N = 126.