Examining the role of transfer coupling in sub-barrier fusion of
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); FLIR Systems Inc., Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- The Australian National Univ., Canberra ACT (Australia)
- The Australian National Univ., Canberra ACT (Australia); John Curtin School of Medical Research, Canberra (Australia)
- The Australian National Univ., Canberra ACT (Australia); Seeing Machines, Canberra (Australia)
- The Australian National Univ., Canberra ACT (Australia); Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
In this study, the presence of neutron transfer channels with positive Q values can enhance sub-barrier fusion cross sections. Recent measurements of the fusion excitation functions for 58Ni+132,124Sn found that the fusion enhancement due to the influence of neutron transfer is smaller than that in 40Ca +132,124Sn although the Q values for multineutron transfer are comparable. The purpose of this study is to investigate the differences observed between the fusion of Sn + Ni and Sn + Ca. Methods: Fusion excitation functions for 46,50Ti +124Sn have been measured at energies near the Coulomb barrier. As a result, a comparison of the barrier distributions for 46Ti+124Sn and 40Ca+124Sn shows that the 40Ca+124Sn system has a barrier strength resulting from the coupling to the very collective octupole state in 40Ca at an energy significantly lower than the uncoupled barrier. In conclusion, the large sub-barrier fusion enhancement in 40Ca induced reactions is attributed to both couplings to neutron transfer and inelastic excitation, with the octupole vibration of 40Ca playing a major role.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1311301
- Alternate ID(s):
- OSTI ID: 1305445
- Journal Information:
- Physical Review C, Vol. 94, Issue 2; ISSN 2469-9985
- Publisher:
- APSCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Mechanism of multinucleon transfer reaction based on the GRAZING model and DNS model
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journal | October 2017 |
Recent experimental results in sub- and near-barrier heavy-ion fusion reactions
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journal | August 2017 |
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