Total gamma-N cross section in the energy range sqrt(s)=40-250 GeV
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The results of measurements of gamma-N total cross section, obtained by the method of photoproduction processes registration at the Baksan Underground Scintillation Telescope, are presented. These data at energies sqrt(s)=40-130 GeV confirm the effect of more rapid photon-hadron cross-section rise as compared to the hadron-hadron ones. It is shown, the increasing of the additive quark number in the products of photon hadronization can be one of the causes responsible for this effect. On the basis of the analysis of experimental data on both gamma-N and gamma-gamma total cross sections, the status of direct and indirect cross-section measurements is discussed.