2018 Impact factor 2.481
Hadrons and Nuclei


Eur. Phys. J. A 10, 249-253

Strong reaction channels at barrier energies in the system 6Li + 208Pb

C. Signorini1, M. Mazzocco1, G.F. Prete2, F. Soramel3, L. Stroe1, A. Andrighetto1, I.J. Thompson4, A. Vitturi1, A. Brondi5, M. Cinausero2, D. Fabris1, E. Fioretto2, N. Gelli6, J.Y. Guo1, 7, G. La Rana5, Z.H. Liu7, F. Lucarelli6, R. Moro5, G. Nebbia1, M. Trotta2, E. Vardaci5 and G. Viesti1

1  Physics Department and INFN, via Marzolo 8, I-35131 Padova, Italy
2  INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
3  Physics Department and INFN, I-33100 Udine, Italy
4  Physics Department, University of Surrey, Guilford GU2 5XH, U.K.
5  Physics Department and INFN, I-80125 Napoli, Italy
6  Physics Department and INFN, Firenze, Italy
7  China Institute of Atomic Energy, Beijing, P.R. of China

(Received: 15 January 2001 / Revised version: 16 February 2001 Communicated by J. Äystö)

Abstract
Large cross-section reaction channels were measured in the systems 6Li(7Li) + 208Pb with high statistical accuracy at 5(3) energies around the Coulomb barrier from 29 to 39 MeV. These channels were assigned (mainly) to the breakup of 6Li, very loosely bound, into $\alpha$ + d and to the breakup of 5Li, produced by n-transfer to the target, into $\alpha$ + p and to similar processes with 7Li beam. The cross-sections with 6Li, $S_{\alpha}$ = 1.475 MeV, are systematically larger than the 7Li ones. This reflects, most likely, the higher binding energy of 7Li, $S_{\alpha}$ = 2.468 MeV. Theoretical predictions for the 6Li + 208Pb system which include for 6Li breakup to continuum states within a continuum discretized coupled-channels approach (CDCC) and resonant breakup plus n-transfer with DWBA reproduce the angular distribution shapes but still underestimate the cross-sections by a factor ~ 3.

PACS
25.70.Ji - Fusion and fusion-fission reactions.
25.70.Mn - Projectile and target fragmentation.
24.10.Eq - Coupled-channel and distorted wave models.

© Società Italiana di Fisica, Springer-Verlag 2001