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A hypothesis of the multichannel character of hydrogen diffusion in solids has been substantiated in the paper. Based on this hypothesis, a mathematical model of hydrogen diffusion in the crystalline lattice was constructed. The model allowed determining the dissolved hydrogen binding energies using an extraction curve. The curve is measured by an industrial vacuumextraction procedure with mass-spectrometric detection of hydrogen streams. The paper presents various experimental data that supports the validity of the multichannel model and discusses the advantages and disadvantages of the proposed approach in comparison with the well-known method of thermal desorption spectra (TDS) that is recognized as the classical way of experimentally determining dissolved hydrogen binding energy in solids.

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