We study fusion reactions of the 64Ni+64Ni system using the
density-constrained time-dependent Hartree-Fock (TDHF) formalism. In this
formalism the fusion barriers are directly obtained from TDHF dynamics. In
addition, we incorporate the entrance channel alignments of the slightly
deformed (oblate) 64Ni nuclei due to dynamical Coulomb excitation. We show
that alignment leads to a fusion barrier distribution and alters the naive
picture for defining which energies are actually sub-barrier. We also show that
core polarization effects could play a significant role in fusion cross section
calculations.Comment: 7 pages, 6 figure