Scattering and resonances in the 4He three-atomic system Original Research Article

A mechanism of appearance and disappearance of the Efimov levels of the helium 4He3 trimer is studied in the case where the force of interatomic interaction varies. The resonances (including virtual levels) are calculated by means of solving a boundary value problem for the Faddeev differential equations describing the (2+1→2+1;1+1+1) scattering processes.