engleski

Sub-barrier fusion of 40}; ; ; Ca+94Zr: Interplay of phonon and transfer couplings

A precise fusion excitation function has been measured for 40Ca+94Zr at near- and sub-barrier energies, and the fusion barrier distribution has been extracted. Comparing with the existing data for 40, 48Ca+90, 96Zr shows that couplings to inelastic excitations determine the fusion cross sections and the shape of the barrier distributions near the barrier. At lower energies, the two systems possessing neutron-transfer channels with large positive Q-values (40Ca+94, 96Zr) have remarkably similar cross sections, and both show a large enhancement with respect to the other systems and to coupled-channels calculations including up to three quadrupole and octupole phonons in the Zr targets.

fusion excitation function; fusion barrier distribution; 40Ca+94Zr; sub-barrier cross sections

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