Breakup Threshold Anomaly in the Elastic Scattering of 6Li on 27Al

J. M. FIGUEIRA; J. O. FERNÁNDEZ NIELLO; D. ABRIOLA; A. ARAZI; O. A. CAPURRO; E. DE BARBARÁ; G.V. MARTÍ; D. MARTÍNEZ HEIMANN; A. E. NEGRI; A. J. PACHECO; I. PADRON; P. R.S. GOMES; J. LUBIAN; T. CORREA; B. PAES

Physical Review C

American Physics Society

Año: 2007 vol. 75 p. 176021 - 176024

Elastic scattering of the weakly bound 6Li on 27Al was measured at near-barrier energies. The data analysis was performed using a Woods-Saxon shape optical potential and also using the double-folding São Paulo potential. The results show the presence of the breakup threshold anomaly (BTA), an anomalous behavior when compared with the scattering of tightly bound nuclei. This behavior is attributed to a repulsive polarization potential produced by the coupling to the continuum breakup states.