MULTINUCLEON TRANSFER-REACTIONS OF CA-40-90,ZR-96(ZR)

The experimental investigation of multi-nucleon transfer channels of C a-40 + Zr-90,Zr-96 has been triggered by the very different fusion exc itation functions recently observed in these two systems. The cross se ctions of the transfer reactions in the two systems have been measured at two energies close to the Coulomb barrier. The time-of-flight spec trometer PISOLO allowed us to identify a multitude of transfer channel s, even very weak ones, with high resolution and efficiency. Especiall y 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 spe ctra of large energy losses (20-30 MeV) involved in the transfer mecha nism at forward angles.