Multinucleon transfer reactions of Ca-40+Zr-90,Zr-96

The experimental investigation of multi-nucleon transfer channels of Ca-40 + Zr-90,Zr-96 has been triggered by the very different fusion excitation functions recently observed in these two systems. The cross sections of the transfer reactions in the two systems have been measured at two energies close to the Coulomb barrier. The time-of-flight spectrometer PISOLO allowed us to identify a multitude of transfer channels, even very weak ones, with high resolution and efficiency. Especially for the neutron pick-up channels, the cross sections are much larger for the target Zr-96 than for Zr-90 with evidence, in the Q-value spectra of large energy losses (20-30 MeV) involved in the transfer mechanism at forward angles.