Cross sections and mean angular momenta for 64Ni + 92,96Zr fusion near and below the Coulomb barrier

Fusion cross sections and mean angular momenta have been measured for 64 Ni + 92,96 Zr around the Coulomb barrier. The results are presented and systematically compared with the predictions of a schematic coupled-channel model, demonstrating the need of more refined calculations including higher-order coupling effects, and/or other degrees of freedom, beyond the usual inelastic and quasi-elastic transfer channels.