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

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.
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Contributor : Michel Lion <>
Submitted on : Wednesday, December 19, 2012 - 6:01:16 AM
Last modification on : Thursday, November 19, 2020 - 6:42:04 PM

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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, Elsevier, 2013, 718, pp.931-936. ⟨10.1016/j.physletb.2012.11.064⟩. ⟨in2p3-00766785⟩

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