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.