2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48077Cross sections for proton inelastic collision with different nuclei are described within the Glauber approximation. The significant difference between approximate ``Glauber'' formula and exact calculations with geometrical scaling assumption is shown for very high energy cross section calculations. According to obtained results values of proton-proton cross section reported by the Akeno and Fly's Eye experimental groups are about 10 % overestimated.4pp (4 eps figures)High Energy Physics - Phenomenologytext