Eur. Phys. J. A 14, 37-42 (2002)
DOI: 10.1140/epja/iepja1348

Enhanced excitation of giant pairing vibrations in heavy-ion reactions induced by weakly bound projectiles

L. Fortunato¹, W. von Oertzen², H.M. Sofia³ and A. Vitturi<sup>1

1</sup>  Dipartimento di Fisica and INFN, Padova, Italy
²  Hahn Meitner Institute, Berlin, Germany
³  Comisión Nacional de Energía Atómica and CONICET, Buenos Aires, Argentina

fortunat@pd.infn.it

(Received: 30 November 2001 / Revised version: 15 February 2002 Communicated by P. Schuck)

Abstract
The use of radioactive ion beams is shown to offer the possibility to study collective pairing states at high excitation energy, which are not usually accessible with stable projectiles because of large energy mismatch. In the case of two-neutron stripping reactions induced by ⁶He, we predict a population of the giant pairing vibration in ²⁰⁸Pb or ¹¹⁶Sn with cross-sections of the order of a millibarn, dominating over the mismatched transition to the ground state.

PACS
21.60.Ev - Collective models.
25.60.Je - Transfer reactions.

© Società Italiana di Fisica, Springer-Verlag 2002