Mechanism of formation of the pre-equilibrium part of cross section in 197Au(α, t), 197Au(α, 3He) reactions and a role of entrance states

Inclusive 197Au(α, t) and 197Au(α, 3He) reaction spectra at incident alpha-particles energy Eα=50 MeV were measured in wide angular and energy range. The experimental results were analyzed basing in the coalescence version of the pre-equilibrium decay excitation model. In its framework, for the case of alpha-particle induced reactions, was suggested a new mechanism for formation of states, ranged by number of unbound excitons, and for emission from them of complex particles. (author)