[en] Values of the reduced activation resonance integral relative to the thermal cross section, I'/σ₀ of ⁷⁴Ge and ⁷⁶Ge were determined relative to gold by measuring cadmium ratios in a reactor spectrum. A lithium-drifted germanium γ-ray spectrometer was used to resolve the activities of the samples. The results for ⁷⁴Ge are I'/σ₀ = 1.514±. 0,031 and I'= .0.631±.123 barn with an assumed σ₀ = 0.45± 0.08 barn ; for ⁷⁶Ge I'/σ₀= 12.00 ±0.16 and I' = 1,992±0.359 with an assumed σ₀= 0.166±0.030 barn. The values obtained for I' are in serious disagreement with the values calculated with neutron resonances parameters and confirm previous results obtained in similar keV average resonance spacing isotones. Due to this fact a careful evaluation of keV neutron radiative capture cross section and resonance integral for ⁷⁴Ge was undertaken. The evaluation and comparison with the experimental value of the resonance integral shows first that for nuclides with an average resonance spacing of keV the unresolved resonance integral has been seriously underestimated in many evaluations and second that between 10 keV and 100 keV resonance integrals calculated with smooth low resolution activation cross section give a better calculation of neutron captures than that obtained with neutron resonance parameters. (author)