Composition of Cosmic Rays with Energy More than 0.1 EeV by Long-Term Optical Observations of Cherenkov Emission at Yakutsk EAS Array


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Abstract

The paper presents results on longitudinal development of air showers with ultra-high energies and mass composition of cosmic rays 〈ln A〉. The data is obtained from observations of Cherenkov emission at the Yakutsk array in 1974–2014. Cascade curves of individual showers reconstructed by lateral distribution of Cherenkov light and depth of maximum Xmax are analyzed in the energy region 1016–6 × 1019 eV. Composition of cosmic rays is determined by interpolation of hadronic interaction QGSJETII-04 model.

About the authors

S. P. Knurenko

Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch

Email: igor.petrov@ikfia.ysn.ru
Russian Federation, Yakutsk

I. S. Petrov

Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch

Author for correspondence.
Email: igor.petrov@ikfia.ysn.ru
Russian Federation, Yakutsk

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