  We demonstrate, within symmetry unrestricted time-dependent density
functional theory, the existence of new effects in low-energy nuclear reactions
which originate from superfluidity. The dynamics of the pairing field induces
solitonic excitations in the colliding nuclear systems, leading to qualitative
changes in the reaction dynamics. The solitonic excitation prevents collective
energy dissipation and effectively suppresses fusion cross section. We
demonstrate how the variations of the total kinetic energy of the fragments can
be traced back to the energy stored in the superfluid junction of colliding
nuclei. Both contact time and scattering angle in non-central collisions are
significantly affected. The modification of the fusion cross section and
possibilities for its experimental detection are discussed.
