On the Peculiarities of Studying Unbound Excited States of 4He Nucleus by α + 3H Interaction

Due to the alpha-particle beam interaction with tritium, two-dimensional spectra of tt, t3He, and dd coincidences are obtained using particle-decay spectroscopy from three-particle 3H(α,tt)p, 3H(α,t 3He)n, 3H(α,td)d reactions (Eα = 67.2 MeV). Excitation energies energy widths for seven excited 4He states, as well ratio their different decay modes, namely t + p, n 3He, d d, by Monte Carlo method.