Decay analysis of compound nuclei formed in reactions with exotic neutron-rich 9Li projectile and the synthesis of 217At⁎ within the dynamical cluster-decay model

The decay of various compound nuclei formed via exotic neutron-rich 9Li projectile is studied within the dynamical cluster-decay model (DCM). Following the earlier work of one of us (RKG) and collaborators (M. Kaur et al. (2015) [1] ), for an empirically fixed neck-length parameter Δ R e m p , the only parameter in the DCM, at a given incident laboratory energy E L a b , we are able to fit almost exactly the (total) fusion cross section σ f u s = ∑ x = 1 6 σ x n for 9Li projectile on 208Pb and other targets, with σ f u s depending strongly on the target mass of the most abundant isotope and its (magic) shell structure. This result shows the predictable nature of the DCM. The neck-length parameter Δ R e m p is fixed empirically for the decay of 217At⁎ formed in 9Li + 208Pb reaction at a fixed laboratory energy E L a b , and then the total fusion cross section σ f u s calculated for all other reactions using 9Li as a projectile on different targets. Apparently, this procedure could be used to predict σ f u s for 9Li-induced reactions where experimental data are not available. Furthermore, optimum choice of “cold” target-projectile combinations, forming “hot” compact configurations, are predicted for the synthesis of compound nucleus 217At⁎ with 8Li + 209Pb as one of the target-projectile combination, or another ( t , p ) combination 48Ca + 169Tb, with a doubly magic 48Ca, as the best possibility.