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Journal Articles Physics Letters B Year : 2013

Role of the cluster structure of $^7$Li in the dynamics of fragment capture

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A. Shrivastava
  • Function : Author
A. Diaz-Torres
  • Function : Author
V. Nanal
  • Function : Author
K. Ramachandran
  • Function : Author
S. Bhattacharyya
  • Function : Author
Avhishek Chatterjee
  • Function : Author
S. Kailas
  • Function : Author
R. Palit
  • Function : Author
V. V. Parkar
  • Function : Author
R. G. Pillay
  • Function : Author
P. C. Rout
  • Function : Author
Y. Sawant
  • Function : Author

Abstract

Exclusive measurements of prompt $\gamma$-rays from the heavy-residues with various light charged particles in the $^7$Li + $^{198}$Pt system, at an energy near the Coulomb barrier (E/$V_b$ $\sim$ 1.6) are reported. Recent dynamic classical trajectory calculations, constrained by the measured fusion, $\alpha$ and $t$ capture cross-sections have been used to explain the excitation energy dependence of the residue cross-sections. These calculations distinctly illustrate a two step process, breakup followed by fusion in case of the capture of $t$ and $\alpha$ clusters; whereas for $^{6}$He + $p$ and $^{5}$He + $d$ configurations, massive transfer is inferred to be the dominant mechanism. The present work clearly demonstrates the role played by the cluster structures of $^7$Li in understanding the reaction dynamics at energies around the Coulomb barrier.

Dates and versions

in2p3-00766785 , version 1 (19-12-2012)

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A. Shrivastava, A. Navin, A. Diaz-Torres, V. Nanal, K. Ramachandran, et al.. Role of the cluster structure of $^7$Li in the dynamics of fragment capture. Physics Letters B, 2013, 718, pp.931-936. ⟨10.1016/j.physletb.2012.11.064⟩. ⟨in2p3-00766785⟩
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