Influence of breakup on elastic and α-production channels in the 6Li+116Sn reaction

  • The effects of breakup reactions on elastic and α-production channels for the 6Li+116Sn system have been investigated at energies below and near the Coulomb barrier. The angular distributions of α-particle production differential cross sections have been obtained at several projectile energies between 22 and 40 MeV. The measured breakup α-particle differential cross sections and elastic scattering angular distributions have been compared with the predictions of continuum-discretized coupled channels (CDCC) calculations. The influence of breakup coupling has also been investigated by extracting dynamic polarization potentials (DPP) from the CDCC calculations. From the predictions of CDCC calculations the relative importance of the nuclear, Coulomb, and total breakup contributions have also been investigated. The nuclear breakup couplings are observed to play an important role in comparison to the Coulomb breakup for the direct breakup mechanisms associated in the reaction of 6Li projectile with 116Sn target nuclei. The influence of strong nuclear breakup coupling exhibits suppression in the Coulomb-nuclear interference peak. The direct breakup cross sections from the CDCC calculations under-predict the measured α-particle differential cross sections at all energies. This suggests that the measured α particles may also have contributions from other possible breakup reaction channels.
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D. Patel, S. Mukherjee, N. Deshmukh, J. Lubian, Jian-Song Wang, T. Correa, B. K. Nayak, Yan-Yun Yang, Wei-Hu Ma, D. C. Biswas, Y. K. Gupta, S. Santra, E. T. Mirgule, L. S. Danu, N. L. Singh and A. Saxena. Influence of breakup on elastic and α-production channels in the 6Li+116Sn reaction[J]. Chinese Physics C, 2017, 41(10): 104001. doi: 10.1088/1674-1137/41/10/104001
D. Patel, S. Mukherjee, N. Deshmukh, J. Lubian, Jian-Song Wang, T. Correa, B. K. Nayak, Yan-Yun Yang, Wei-Hu Ma, D. C. Biswas, Y. K. Gupta, S. Santra, E. T. Mirgule, L. S. Danu, N. L. Singh and A. Saxena. Influence of breakup on elastic and α-production channels in the 6Li+116Sn reaction[J]. Chinese Physics C, 2017, 41(10): 104001.  doi: 10.1088/1674-1137/41/10/104001 shu
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Received: 2017-05-03
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    One of the authors (SM) would like to thank DAE-BRNS for financial assistance through a major research project. This work is supported by National Natural Science Foundation of China (U1432247, 11575256, U1632138, 11605253) and China Postdoctoral Science Foundation (2016M602906)

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Influence of breakup on elastic and α-production channels in the 6Li+116Sn reaction

  • 1.  CAS Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2.  Department of Physics, Faculty of Science, The M. S. University of Baroda, Vadodara-390002, India
  • 3.  INFN Laboratori Nazionali del Sud, Catania, Italy
  • 4.  Instituto de Fisica, Universidade Federal Fluminense, Av. Litoranea s/n, Gragoatmá
  • 5.  Instituto de Aplicaç
  • 6.  Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India
Fund Project:  One of the authors (SM) would like to thank DAE-BRNS for financial assistance through a major research project. This work is supported by National Natural Science Foundation of China (U1432247, 11575256, U1632138, 11605253) and China Postdoctoral Science Foundation (2016M602906)

Abstract: The effects of breakup reactions on elastic and α-production channels for the 6Li+116Sn system have been investigated at energies below and near the Coulomb barrier. The angular distributions of α-particle production differential cross sections have been obtained at several projectile energies between 22 and 40 MeV. The measured breakup α-particle differential cross sections and elastic scattering angular distributions have been compared with the predictions of continuum-discretized coupled channels (CDCC) calculations. The influence of breakup coupling has also been investigated by extracting dynamic polarization potentials (DPP) from the CDCC calculations. From the predictions of CDCC calculations the relative importance of the nuclear, Coulomb, and total breakup contributions have also been investigated. The nuclear breakup couplings are observed to play an important role in comparison to the Coulomb breakup for the direct breakup mechanisms associated in the reaction of 6Li projectile with 116Sn target nuclei. The influence of strong nuclear breakup coupling exhibits suppression in the Coulomb-nuclear interference peak. The direct breakup cross sections from the CDCC calculations under-predict the measured α-particle differential cross sections at all energies. This suggests that the measured α particles may also have contributions from other possible breakup reaction channels.

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