Elastic scattering of 7Li+27Al at several angles in the 7-11 MeV energy range

ABRIOLA, DANIEL; CARNELLI, PATRICIO FRANCISCO FLORENCIO; ARAZI, ANDRÉS; FIGUEIRA, JUAN MANUEL; CAPURRO, OSCAR A.; CARDONA, MARÍA ANGÉLICA; FERNÁNDEZ NIELLO, JORGE O.; HOJMAN, DANIEL; FIMIANI, LETICIA; GRINBERG, PATRICIO; MARTINEZ HEIMANN, DIEGO; MARTÍ, GUILLERMO V.; NEGRI, AGUSTÍN E.; PACHECO, ALBERTO J.

NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH B - BEAM INTERACTIONS WITH MATERIALS AND ATOMS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2010 vol. 268 p. 1793 - 1796

0168-583X

Elastic cross sections for the 7Li+27Al system were measured at laboratory energies between 7 and 11 MeV in steps of 0.25 MeV, and angles between 135° and 170° in steps of 5°. Excitation functions forthe elastic scattering were measured using an array of eight Si surface-barrier detectors whereas a solid-state telescope was used to estimate and subtract background from other reactions. Contamination from alpha particles arising from the 7Li breakup process at Elab > 10 MeV makes the use of these energies inadvisable for RBS applications. The present results are compared with previous data obtained at 165°(Elab < 6 MeV), 140° and 170° (Elab < 8 MeV). The experimental data were analyzed in terms of the Optical Model. Two different energy-independent potentials were found. These optical potentials allow an interpolation with physical meaning to other energies and scattering angles. The experimental cross sections will be uploaded to the IBANDL database.