[en] A new analysis of the experimental data obtained by the ¹²C(p, p) reaction at the proton scattering angle θ_f = 80 near two superimposed 3.511 MeV, 3/2^- and 3.547 MeV, 5/2⁺ resonance states of the ¹³N compound nucleus was carried out by using the bremsstrahlung method and considering the interference between the background (direct) and resonant (compound nucleus) processes. A general expression of the collision duration is obtained for the case of superimposed resonances with different values of the spin and parity distorted by the non-resonant background. The results of calculations performed using this expression for the case of the two 3.511 and 3.547 MeV ¹³N states are compared with the experimental data. The total collision duration versus outgoing photon energy is deduced. (orig.)