Abstract
Charge and mass distributions at ${E}_{lab}=114.4$ and $102.1\phantom{\rule{0.3em}{0ex}}\text{MeV}$, and the mass-resolved angular distribution at ${E}_{lab}=102.1\phantom{\rule{0.3em}{0ex}}\text{MeV}$ in $^{20}\mathrm{Ne}$ induced fission of $^{208}\mathrm{Pb}$ have been studied using the recoil catcher technique followed by off-line $\ensuremath{\gamma}$ ray spectrometry. The mass distributions have been found to be symmetric at both energies. The data on the variance of the mass distributions from this work and from literature have been analyzed to investigate the effect of the fissility on the stiffness of mass-asymmetric deformations. The stiffness was found to increase up to ${Z}^{2}∕A\ensuremath{\sim}34$ and decrease at higher values of ${Z}^{2}∕A$. Angular anisotropies of 16 fission products have been measured. The results show that the angular anisotropy is not significantly correlated with the mass asymmetry. The experimentally determined angular anisotropy, averaged over the mass, was found to be significantly higher than that calculated using a statistical saddle point model.
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