Excitation functions have been measured for the fusion of the weakly bound nuclei Li-6 and Li-7 respectively with Sn-120 and Sn-119 at energies around the Coulomb barrier by using an activation technique. With such a study we aim to investigate the role played by direct processes as neutron transfer and breakup on fusion. At energies above the barrier, the complete fusion cross section are lower than those predicted by fusion models. This suppression is independent of beam energy and is in agreement with the values reported in literature for heavier systems. At energies below the barrier, no significant enhancement due to the positive Q-value for one and two neutron transfer for the Li-7+Sn-119 system is observed as compared with the Li-6+Sn-120.
Fusion of the Li-6+Sn-120 and Li-7+Sn-119 and the role of neutron transfer and breakup processes
LATTUADA, Marcello;MUSUMARRA, Agatino;
2014-01-01
Abstract
Excitation functions have been measured for the fusion of the weakly bound nuclei Li-6 and Li-7 respectively with Sn-120 and Sn-119 at energies around the Coulomb barrier by using an activation technique. With such a study we aim to investigate the role played by direct processes as neutron transfer and breakup on fusion. At energies above the barrier, the complete fusion cross section are lower than those predicted by fusion models. This suppression is independent of beam energy and is in agreement with the values reported in literature for heavier systems. At energies below the barrier, no significant enhancement due to the positive Q-value for one and two neutron transfer for the Li-7+Sn-119 system is observed as compared with the Li-6+Sn-120.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
