Investigation of the ground and the first excited states of 5Li

The α+d system was investigated in a kinematically complete experiment by 2H(α, pα)n three-body reaction with an α-beam energy 27.2 MeV. The unbound first excited and ground states of 5Li were observed and their parameters were determined. Coincidence pα-spectrum was fitted by model of the sequential decay of 5Li ground and excited states through the α+p channel. The best agreement with the data was obtained assuming the following parameters of the ground state: Еαp = 2.14 MeV, Γ = 1.30 MeV; and of the first excited state: Еαp = 4.8 MeV, Γ = 2.0 MeV.