Abstract
An exclusive measurement has been made of the Coulomb dissociation of the two-neutron halo nucleus Li11 at 70MeV/nucleon at RIKEN. Strong low-energy (soft) E1 excitation is observed, peaked at about Ex=0.6MeV with B(E1)=1.42(18)e2fm2 for Erel≤3MeV, which was largely missed in previous measurements. This excitation represents the strongest E1 transition ever observed at such low excitation energies. The spectrum is reproduced well by a three-body model with a strong two-neutron correlation, which is further supported by the E1 non-energy-weighted cluster sum rule.
Original language | English |
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Article number | 252502 |
Journal | Physical review letters |
Volume | 96 |
Issue number | 25 |
DOIs | |
Publication status | Published - 2006 |
ASJC Scopus subject areas
- Physics and Astronomy(all)