[en] Experimental results on the excitation of isomeric nuclear states in the reactions ¹¹¹Cd(γ, γ′)^111mCd, ¹¹³In(γ, γ′)^113mIn, and ¹¹⁵In(γ, γ′)^115mIn studied by the activation method at photon energies of up to 8 MeV are presented. The respective experiments were performed at the LUE-8 linear electron accelerator of the Institute for Nuclear Research (INR, Moscow). A method for calculating cross sections per equivalent photon was developed with the aid of a simulation on the basis of the GEANT-4 code. The data obtained in this way are discussed from the point of view of the possibility of studying collective nuclear excitations of various multipolarity near the threshold.