Zenith-Angular Characteristics of Particles in EASs with $E_0\simeq 10^{18}$ eV According to the Yakutsk Array Data

Abstract

Particle lateral distributions were investigated in cosmic ray air showers with energy $E_0\simeq 10^{18}$ eV registered at the Yakutsk array with surface and underground scintillation detectors with $\simeq 1\times \sec \theta$~GeV threshold during the period of continuous observations from 1986 to 2016. The analysis covers events with arrival direction zenith angles $\theta \le 60^{\circ }$ within five intervals with step $\Delta \cos \theta =0.1$. Experimental values were compared to simulation results obtained with the use of CORSIKA code within the framework of QGSJet01 hadron interaction model. The whole dataset points at probable cosmic ray composition which is close to protons.

14 pages, 6 figures. Accepted for publication in Physics of Atomic Nuclei, volume 86 (2023)

References in corpus (3)

• Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory
• Energy Spectrum of Ultrahigh-Energy Cosmic Rays according to Data from Ground-Based Scintillation Detectors of the Yakutsk EAS Array
• Mass composition of cosmic rays with energy above 10**17 eV according to surface detectors of the Yakutsk EAS array

Cited by in corpus (3)

• Muon puzzle in ultra-high energy EASs according to Yakutsk array and Auger experiment data
• A Direct Comparison of Muon Measurements at the Yakutsk Array and the Pierre Auger Observatory
• The puzzle of composition of cosmic rays with energies (2-12.5) EeV according to muon detectors data of the Yakutsk EAS array