Effects of nuclear deformation on fusion probability in the reactions of Se-82+ Ce-nat and Ge-76+ Nd-150 near the Coulomb barrier - art. no. 044610

Evaporation residue (ER) cross sections for Se-82 + Ce-nat (Z(1)Z(2) = 1972 ) were measured in the vicinity of the Coulomb barrier and the fusion proba bility was obtained with the aid of calculated survival probability. This f usion probability was compared with that for Ge-76 + Nd-150 (Z(1)Z(2) = 192 0), which was determined with the same manner by using the data published b y us. The former system represents fusion of two spherical nuclei, the latt er fusion involving the prolately deformed target Nd-150. The collision of Ge-76 with the side of Nd-150 is the most compact configuration at touching . The system Se-82 + Ce-nat showed fusion hindrance in the form of extra-ex tra-push energy of 27+/-5 MeV, whereas the system Ge-76 + Nd-150 does not s how fusion hindrance at and above the Coulomb barrier energy, suggesting th at the reaction starting from the compact touching point results in a highe r fusion probability.