Transfer reactions and sub-barrier fusion in 40Ca+90,96Zr

The two systems Ca-40 + Zr-90,Zr-96 have been studied by measuring nucleon transfer reactions at two energies near the Coulomb barr;er, thus complementing the available sub-barrier fusion cross-sections. Angular distributions for various transfer channels have been determined. Significantly larger neutron transfer cross-sections are found for the target Zr-96 that exhibits the larger enhancement in the sub-barrier fusion cross-sections. All data have been analyzed with a new model for heavy-ion collisions that calculates simultaneously transfer cross-sections, fusion excitation functions and barrier distributions. The model gives a good account of both transfer and fusion data.