Résumé du preprint Irfu-08-89

Irfu-08-89
1n- and 2n- tranfer with the Borromean nucleus $^6He$ near the Coulomb barrier.
A. Chatterjee et al (N. Keeley, C. Simenel)
Angular distributions for 1n and 2n transfer are reported for the 6He + 65Cu system at Elab = 22.6 MeV. For the first time, triple coincidences between particles, neutrons and characteristic -rays from the target-like residues were used to separate the contributions arising from 1n and 2n transfer. The measured differential cross-sections for these channels, elastic scattering and fusion have been analyzed using a Coupled Reaction Channels approach. The measured large ratio of the 2n/1n cross section and the strong influence of 2n transfer on other channels point towards the dominance of a di-neutron configuration of 6He in the reaction mechanism.