Examination of the threshold anomaly pattern displayed in 6,7 Li + 232 Th systems

Ye. A. Tulekov, Nurlan Amangeldi, Aliya A. Baratova, Doha Mohamed Elbehari, Gani Yergaliuly, Zh. Kerimkulov, Salwa Saad, Sh. Hamada

2026

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DOI 10.1088/1402-4896/ae6bc5

Data confidence 85 high

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Abstract

Abstract We reanalyze the elastic scattering angular distributions (ADs) for the 6,7 Li + 232 Th systems within the 24–44 MeV energy range using various phenomenological and semi-microscopic potentials. This study aims to assess the consistency of these potentials in describing the experimental data and to explore the cluster structure of the weakly bound 6,7 Li projectiles, particularly their breakup effects on elastic scattering. Our findings reveal that the repulsive dynamical polarization potential (DPP), arising from strong coupling to the breakup channel, substantially reduces the real potential strength, highlighting the significant influence of breakup processes on elastic scattering. The results indicate that the 6 Li + 232 Th system exhibits a breakup threshold anomaly (BTA), whereas the 7 Li + 232 Th system follows a normal threshold anomaly (TA). These findings provide critical insights into the interplay between breakup effects and elastic scattering in reactions involving weakly bound nuclei.