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The low-lying unbound level structure of the halo nucleus 19C has been investigated using single-neutron knockout from 20C on a carbon target at 280 MeV/nucleon. The invariant mass spectrum, derived from the momenta of the forward going beam velocity 18C fragment and neutrons, was found to be dominated by a very narrow near threshold (Erel=0.036(1) MeV) peak. Two less strongly populated resonance-like...
The first excited state of the most neutron-rich beryllium isotope, 14 Be, has been studied by inelastic scattering with a 12 C target at 68 MeV/nucleon. The state has been observed at Ex=1.54(13) MeV, and its spin-parity has been determined as Jπ=2+ from the measurement of the angular distribution. This provides a complete set of energies of the first 2+ states in the beryllium isotopic...
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