Experimental Determination of the Effective Resonance Absorption Integrals of 238 U and 158 Gd in Urania–Gadolinia Rods

The experimental procedure and the results of determination of the effective resonance neutron absorption integrals of 238U and 158Gd for isolated UO2–Gd2O3 rods are presented. Measurements were performed using the activation method. UO2–Gd2O3 rods were irradiated in the neutron field with the Fermi spectrum formed at the center of the core of the F-1 research reactor at the National Research Centre Kurchatov Institute.