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Title: Examining the role of transfer coupling in sub-barrier fusion of Ti46,50+Sn124

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.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4] ;  [3] ;  [5] ;  [6]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); FLIR Systems Inc., Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. The Australian National Univ., Canberra ACT (Australia)
  4. The Australian National Univ., Canberra ACT (Australia); John Curtin School of Medical Research, Canberra (Australia)
  5. The Australian National Univ., Canberra ACT (Australia); Seeing Machines, Canberra (Australia)
  6. The Australian National Univ., Canberra ACT (Australia); Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
Publication Date:
OSTI Identifier:
1311301
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
APS
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY