Near-Barrier Fusion of Sn+Ni and Te+Ni Systems: Examining the Correlation between Nucleon Transfer and Fusion Enhancement

作者：Kohley Z^*; Liang J F; Shapira D; Varner R L; Gross C J; Allmond J M; Caraley A L; Coello E A; Favela F; Lagergren K; Mueller P E

来源：Physical Review Letters, 2011, 107(20): 202701.

DOI：10.1103/PhysRevLett.107.202701

The fusion excitation functions for radioactive (132)Sn + (58)Ni and stable (130)Te + 58; (64)Ni were measured at energies near the Coulomb barrier. The coupling of transfer channels in heavy-ion fusion was examined through a comparison of Sn + Ni and Te + Ni systems, which have large variations in the number of positive Q-value nucleon transfer channels. In contrast with previous experimental comparisons, where increased sub-barrier fusion cross sections were observed in systems with positive Q-value neutron transfer channels, the reduced excitation functions were equivalent for the different Sn + Ni and Te + Ni systems. The present results suggest a dramatically different influence of positive Q-value transfer channels on the fusion process for the Sn + Ni and Te + Ni systems.

• 出版日期2011-11-7