Spectroscopy of the heavy lithium isotopes 10-12Li. European Physical Journal A Volume 49, Issue 6, 2013, Pages 1-7

The experimental search for the production of heavy lithium isotopes 10-12Li was carried out in the stopped π--meson absorption reactions on the radioactive target 14C. The study of 10Li was performed in the missing mass spectra in the 14C(π-, pt)X and 14C(π-, dd)X reactions. Three excited states of 10Li were identified. A broad state with a resonance energy Er = 6.13 ± 0.11MeV has the highest excitation energy, compared with previously observed levels. The resonance parameters of three low-lying excited states of 11Li were determined in the 14C(π-, pd)X reaction. In the 14C(π-, pp)X reaction an evidence for a 12Li excited state (Er = 4.0 ± 0.2MeV and Γ = 1.1 ± 0.2MeV) was found.