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With the recent availability of state-of-the-art radioactive ion beams, therehas been a renew interest in the investigation of nuclear reactions with heavyions near the Coulomb barrier. The role of inelastic and transfer channelcouplings in fusion reactions induced by stable heavy ions can be revisited.Detailed Analysis of recent experimental fusion cross sections by usingstandard coupled-channel calculations is first discussed. Multi-neutrontransfer effects are introduced in the fusion process below the Coulomb barrierby analyzing 32S+90,96Zr as benchmark reactions. The enhancement of fusioncross sections for 32S+96Zr is well reproduced at sub-barrier energies by NTFuscode calculations including the coupling of the neutron-transfer channelsfollowing the Zagrebaev semi-classical model. Similar effects for 40Ca+90Zr and40Ca+96Zr fusion excitation functions are found. The breakup coupling in boththe elastic scattering and in the fusion process induced by weakly bound stableprojectiles is also shown to be crucial. In the second part of this work, fullcoupled-channel calculations of the fusion excitation functions are performedby using the breakup coupling for the more neutron-rich reaction and for themore weakly bound projectiles. we clearly demonstrate thatContinuum-Discretized Coupled-Channel calculations are capable to reproduce thefusion enhancement from the breakup coupling in 6Li+59Co.

Transfer/Breakup Channel Couplings in Sub-barrier Fusion Reactions