Comparative study for reaction dynamics of ⁶He projectiles scattered from ⁵⁸Ni, ⁶⁴Zn, and ¹²⁰Sn targets
DOI:
https://doi.org/10.31349/RevMexFis.72.041201Keywords:
double and cluster folding potentials, 6He breakup, normal and breakup threshold anomaliesAbstract
We perform a comparative analysis of the elastic scattering of $^6$He projectiles from $^{58}$Ni, $^{64}$Zn, and $^{120}$Sn targets at near-barrier energies (9–21.7 MeV, 9–17.9 MeV, and 17.4–20.5 MeV, respectively). The exotic two-neutron halo structure of $^6$He strongly influences the scattering dynamics near the Coulomb barrier. Using a range of microscopic and cluster-based potentials—including the double-folding potential (DFP), São Paulo potential (SPP), Brazilian nuclear potential (BNP), and a cluster folding potential (CFP)—we analyze the angular distributions to explore the effects of $^6$He breakup and the resulting dynamic polarization. Our study systematically examines the emergence of breakup threshold anomalies, the behavior of the optical potential parameters, and the role of target mass and charge in modifying the effective interaction. The CFP, which explicitly incorporates the $\alpha + 2n$ cluster configuration, consistently yields larger reaction cross-sections, underscoring the importance of cluster degrees of freedom in describing halo-nucleus collisions.
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