Entrance Channel Dynamics of Hot and Cold Fusion Reactions Leading to Superheavy Elements

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We investigate the entrance channel dynamics for the reactions ⁷⁰Zn+²⁰⁸Pb and ⁴⁸Ca+²³⁸U using the fully microscopic time-dependent Hartree-Fock (TDHF) theory coupled with a density constraint. We calculate excitation energies and capture cross-sections relevant for the study of superheavy formations. We discuss the deformation dependence of the ion-ion potential for the ⁴⁸Ca+²³⁸U system and perform an alignment angle averaging for the calculation of the capture cross-section. The results show that this parameter-free approach can generate results in good agreement with experiment and other theories.