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Elastic scattering and fusion cross-sections in 7Li + 27Al reaction

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Abstract

With an aim to understand the effects of breakup and transfer channels on elastic scattering and fusion cross-sections in the 7Li + 27Al reaction, simultaneous measurement of elastic scattering angular distributions and fusion cross-sections have been carried out at various energies (E lab = 8.0–16.0 MeV) around the Coulomb barrier. Optical model (OM) analysis of the elastic scattering data does not show any threshold anomaly or breakup threshold anomaly behaviour in the energy dependence of the real and imaginary parts of the OM potential. Fusion cross-section at each bombarding energy is extracted from the measured α-particle evaporation energy spectra at backward angles by comparing with the statistical model prediction. Results on fusion cross-sections from the present measurements along with data from the literature have been compared with the coupled-channels predictions. Detailed coupled-channels calculations have been carried out to study the effect of coupling of breakup, inelastic and transfer, channels on elastic scattering and fusion. The effect of 1n-stripping transfer coupling was found to be significant compared to that of the projectile breakup couplings in the present system.

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Acknowledgements

The authors would like to thank FOTIA staff at BARC for their cooperation during the experiment and Dr S Kailas for fruitful discussions. D Patel and S Mukherjee gratefully acknowledge the financial support from DAE-BRNS (No. 2008/37/42) through a major research project. V V Parkar acknowledges the financial support of INSPIRE Faculty Award, Department of Science and Technology, Govt. of India for carrying out these investigations.

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, The M.S. University of Baroda, Vadodara, 390 002, India

    D PATEL, S MUKHERJEE & P K RATH

  2. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India

    S SANTRA, B K NAYAK, V V PARKAR & R K CHOUDHURY

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  1. D PATEL
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Correspondence to D PATEL.

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PATEL, D., SANTRA, S., MUKHERJEE, S. et al. Elastic scattering and fusion cross-sections in 7Li + 27Al reaction. Pramana - J Phys 81, 587–602 (2013). https://doi.org/10.1007/s12043-013-0597-1

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