Eur. Phys. J. A (2009) 39: 187-194
https://doi.org/10.1140/epja/i2008-10702-7

Regular Article - Experimental Physics

Total reaction and fusion cross sections at sub- and near-barrier energies for the system ⁷Li + ²⁸Si

¹ Department of Physics, The University of Ioannina, 45110, Ioannina, Greece
² Department of Nuclear Reactions, The Andrzej Sołtan Institute for Nuclear Studies, Hoża 69, 00-681, Warsaw, Poland
³ DSM/DAPNIA CEA SACLAY, 91191, Gif-sur-Yvette, France
⁴ National Technical University of Athens, Athens, Greece
⁵ National Research Center Demokritos, Athens, Greece
⁶ Dipartimento di Metodologie Fisiche e Chimiche per l’Ingegneria, dell’Universita di Catania, Catania, Italy
⁷ INFN, Sezione di Napoli, I-80125, Napoli, Italy

^* e-mail: apakou@cc.uoi.gr

Received: 17 October 2008
Revised: 11 December 2008
Accepted: 12 December 2008
Published online: 20 January 2009

Abstract

Fusion cross sections are extracted for the ⁷Li$ + $²⁸Si system, via reaction cross section and transfer measurements at sub- and near-barrier energies ( E _lab = 5.7 to 14MeV). The energy evolution of transfer to reaction cross section ratios is determined with the aid of CDCC calculations, which subsequently allows the deduction of fusion cross sections at sub- and near-barrier energies. It is shown that fusion can be well represented in a BPM context. Fusion cross sections are compared for the systems ⁷Li$ + $²⁸Si and ⁶Li$ + $²⁸Si, the latter studied previously, and are found to exhibit different strengths. Last, the direct channels determined at 13MeV, are found to be dominated by a 2n -transfer mechanism.