Аннотация:A scintillation detector is used to investigate the leakage spectrum of internal conversion electrons produced from gadolinium by the capture of thermal neutrons in a thin layer of gadolinium. Thermoluminescent dosimeters are used to measure the dose of prompt γ-rays from gadolinium. The measurements are performed in the thermal column of a BFS-2 critical assembly and in a thermal-neutron beam extracted from a BR-10 reactor.