Elastic scattering in the 6,7Li+80Se systems

FIMIANI, LETICIA; FIGUEIRA, JUAN MANUEL; MARTÍ, GUILLERMO V.; TESTONI, JORGE E.; ARAZI, ANDRÉS; CAPURRO, OSCAR A.; ZAVALA CÁRDENAS, WALTER H.; CARDONA, MARÍA ANGÉLICA; CARNELLI, PATRICIO FRANCISCO FLORENCIO; DE BARBARÁ, EZEQUIEL; HOJMAN, DANIEL; MARTINEZ HEIMANN, DIEGO; NEGRI, AGUSTÍN E.; PACHECO, ALBERTO J.

PHYS. REV. - C

AMER PHYSICAL SOC

Año: 2012 vol. 86 p. 1 - 11

0556-2813

Elastic scattering angular distributions for the 6,7Li+80Se systems were measured at center-of-mass energies from below to above the Coulomb barrier, 13 < Ec.m. < 24 MeV. The experimental elastic scattering cross sections were analyzed within the framework of the optical model to study the energy dependence of the real and imaginary parts of the nuclear potential. The main objective was to investigate the threshold anomaly in those weakly bound systems. The behavior of the calculated potentials as a function of energy indicates that our results are consistent with the dispersion relation. The threshold anomaly was observed in the 7Li+80Se system and its absence was confirmed for the 6Li+80Se system. An analysis of optical potentials that best fit the experimental data, is compatible with the presence of an external absorptive region for energies close to the Coulomb barrier.