The Samarkand EAS installation and experimental results

Computer Science

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Cerenkov Radiation, Cosmic Ray Showers, Electron Photon Cascades, Primary Cosmic Rays, Radiation Distribution, Scintillation Counters, Elementary Particle Interactions, Inelastic Scattering, Particle Energy, Particle Flux Density, Scattering Cross Sections, Spatial Distribution

Scientific paper

The Samarkand University extensive-air-shower installation is briefly described, and experimental results obtained at this installation are discussed. It is shown that the spatial distribution of EAS Cerenkov emission at distances of 10-100 m from the EAS axis with respect to shape and absolute value given a purely protonic composition of the primary radiation can be made compatible with the scaling model only under the assumption of an anomalously sharp increase with energy of the cross section of the inelastic interactions of hadrons with atomic air nuclei. In addition, it is shown that the Xmax(E0) relationship (Xmax is the position of the maximum of an individual EAS) obtained at E0 exceeding 10 to the 17th eV on the basis of Yakutsk data does not contradict Samarkand data at E0 = 10 to the 16th eV.

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