Determination of Excitation Energy Spectrum of $${}^{{6}}$$Li in the Reaction $${n+}{}^{{6}}$$Li

An experiment was carried out at the RADEX neutron channel of the Institute for Nuclear Research, Russian Academy of Sciences, at neutron energies of 40–60 MeV to investigate the cluster structure $${}^{3}\textrm{He}+t$$ of $${}^{6}$$ Li nucleus in the reaction $${}^{6}$$ Li( $$n$$ ; $${}^{3}$$ He $$n$$ ) $$t$$ . The excitation energy spectrum of $${}^{6}$$ Li was obtained in the range $$E_{x}=16{-}50$$ MeV. At an excitation energy of $$E_{x}=16.6$$ MeV a resonance with $$\Gamma=0.7$$ MeV was observed, and in the interval $$E_{x}=30{-}50$$ MeV two broad resonances were found at $$E_{x}=35.9$$ and $$43.1$$ MeV with $$\Gamma=8.4$$ and $$5.4$$ MeV, respectively. All levels are observed for the first time.