Eur. Phys. J. A (2012) 48: 102
https://doi.org/10.1140/epja/i2012-12102-x

Regular Article - Experimental Physics

Quasi-elastic backscattering of ^6,7Li on light, medium and heavy targets at near- and sub-barrier energies

¹ Department of Physics and HINP, The University of Ioannina, 45110, Ioannina, Greece
² INFN-LNS and University of Catania, Catania, Italy
³ “Horia Hulubei” National Institute of Physics and Nuclear Engineering, Bucharest, Romania
⁴ Dipartimento di Scienze Fisiche and INFN, Sezione di Napoli, via Cinthia, I-80126, Napoli, Italy
⁵ Dipartimento di Fisica, INFN, I35131, Padova, Italy
⁶ Sezione di Napoli, INFN, via Cinthia, I-80126, Napoli, Italy
⁷ Dapartamento di Fisica Atomica Molecular y Nuclear, Universidad de Huelva, E-21071, Huelva, Spain
⁸ Heavy Ion Laboratory, University of Warsaw, Warsaw, Poland
⁹ Department of Nuclear Reactions, The Andrzej Sołtan Institute for Nuclear Studies, Warsaw, Poland

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

Received: 23 May 2012
Revised: 6 July 2012
Accepted: 12 July 2012
Published online: 27 July 2012

Abstract

We have performed precision elastic backscattering measurements for the weakly bound nuclei ^6,7Li on the medium and heavy mass targets ⁵⁸Ni, ^116,120Sn and ²⁰⁸Pb at sub- and near-barrier energies (E _c.m. /V _bar = 0.6 to 1.3). Excitation functions of elastic scattering cross-sections have been measured at ±160° and ±170° and the corresponding ratios to Rutherford scattering and relevant barrier distributions have been extracted. These measurements complement recent work on a ²⁸Si target, for probing systematically the potential at sub- and near-barrier energies and relevant reaction mechanisms, while indicate a possible breakdown of the dispersion relation.