Energy dependence of the optical potential of the weakly bound 9Be projectile on the 197Au target

GOLLAN, F.; ABRIOLA, D.; ARAZI, A.; CARDONA, M.A.; DE BARBARÁ, E.; HOJMAN, D.; ID BETAN, R.M.; MARTÍ, G.V.; PACHECO, A.J.; RODRIGUES, D.; TOGNERI, M.

NUCLEAR PHYSICS A

ELSEVIER SCIENCE BV

Año: 2020 vol. 1000

0375-9474

In this work we measured elastic and inelastic angular distributions of the weakly bound 9Be projectile on the 197Au target at several bombarding energies from 84% up to 140% of the Coulomb barrier. The elastic angular distributionswere analyzed using a phenomenological Woods-Saxon potential and a double folding S~ao Paulo potential and the energy dependence was extracted. Angular distributions from two inelastic peaks were compared with coupledchannel calculations using reduced transition probabilities available in the literature. The energy dependence of the two interaction potential models show a similar trend in the region of the Coulomb barrier. Dispersion relationcalculation demonstrates the presence of the breakup threshold anomaly proposed for weakly bound systems.