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<p>We reanalyzed elastic scattering data for the <sup>9</sup>Be + <sup>144</sup>Sm system at incident energies between 30 and 48&#xa0;MeV, employing a range of phenomenological and semi-microscopic optical potentials. Our goal was to test the consistency of these models and investigate the cluster structure of the weakly bound <sup>9</sup>Be nucleus, which governs the influence of breakup affects elastic scattering. The analysis shows that breakup coupling produces a repulsive dynamical polarization potential, substantially weakening the real potential. This confirms breakup's dominant role. Furthermore, the energy-dependent behavior of the optical potential, specifically a sustained imaginary component near the Coulomb barrier, strongly indicates the presence of the breakup threshold anomaly in this system.</p>

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Signatures of the breakup threshold anomaly in 9Be + 144Sm elastic scattering: a multi-potential analysis

  • 期刊论文

  • 发表日期：

    2026年6月1日

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  • D. M. Janseitov,
  • D. S. Valiolda,
  • S. K. Sakhiyev,
  • B. Mauyey,
  • Awad A. Ibraheem,
  • Sh. Hamada

摘要

We reanalyzed elastic scattering data for the 9Be + 144Sm system at incident energies between 30 and 48 MeV, employing a range of phenomenological and semi-microscopic optical potentials. Our goal was to test the consistency of these models and investigate the cluster structure of the weakly bound 9Be nucleus, which governs the influence of breakup affects elastic scattering. The analysis shows that breakup coupling produces a repulsive dynamical polarization potential, substantially weakening the real potential. This confirms breakup's dominant role. Furthermore, the energy-dependent behavior of the optical potential, specifically a sustained imaginary component near the Coulomb barrier, strongly indicates the presence of the breakup threshold anomaly in this system.