Mass composition of cosmic rays determined by muon fraction with ${\epsilon }_{thr.}\ge$ 1 GeV in air showers with energy greater than 5 EeV

Abstract

The ratio of the number of muons with a threshold of 1 GeV and charged particles at a distance of 600 m from the axis is analyzed. Air showers with energies above 5 EeV and zenith angles with less than 60 degrees are considered. Comparison of experimental data with calculations by the QGSJETII-04 model for various primary nuclei, including a gamma ray, showed that the mass composition of cosmic rays up to energies of $\sim$ 10 EeV mainly consists of protons and helium nuclei, with a small number of heavy nuclei. Data include air showers with a very low muon content, which are assumed to be produced by primary gamma rays.

arXiv comment13 pages, 10 figures

References in corpus (25)

• Monte Carlo treatment of hadronic interactions in enhanced Pomeron scheme: I. QGSJET-II model
• COSMOLOGICAL GAMMA RAY BURSTS AND THE HIGHEST ENERGY COSMIC RAYS
• Origin and Propagation of Extremely High Energy Cosmic Rays
• QGSJET-II: towards reliable description of very high energy hadronic interactions
• Measurements of the Cosmic Ray Composition with Air Shower Experiments
• The surface detector array of the Telescope Array experiment
• Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
• On the cosmic ray bound for models of extragalactic neutrino production
• Depth of Maximum of Air-Shower Profiles at the Pierre Auger Observatory: Composition Implications
• High-energy neutrinos in the context of multimessenger physics
• Cosmogenic Neutrinos: parameter space and detectabilty from PeV to ZeV
• GZK Neutrinos after the Fermi-LAT Diffuse Photon Flux Measurement
• Study of Ultra-High Energy Cosmic Ray Composition Using Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode
• Cosmic-ray energy spectrum and composition up to the ankle - the case for a second Galactic component
• Cluster Accretion Shocks as Possible Acceleration Sites for Ultra High Energy Protons below the Greisen Cutoff
• GZK Photons as Ultra High Energy Cosmic Rays
• The Energy Spectrum of Cosmic Rays above 10${}^{17.2}$ eV Measured by the Fluorescence Detectors of the Telescope Array Experiment in Seven Years
• Extragalactic UHE proton spectrum and prediction for iron-nuclei flux at 10^8 - 10^9 GeV
• Mass composition of ultra-high-energy cosmic rays with the Telescope Array Surface Detector Data
• Large scale distribution of arrival directions of cosmic rays detected above $10^{18}$ eV at the Pierre Auger Observatory
• Detection of non-thermal hard X-ray emission from the "Fermi bubble" in an external galaxy
• Mass composition of cosmic rays above 0.1 EeV by the Yakutsk array data
• Radio emission of air showers with extremely high energy measured by the Yakutsk radio array
• A search for Extragalactic Sources of Ultrahigh-Energy Cosmic Rays
• Influence of Primary Cosmic Radiation Mass Composition on the Estimation of Eas Energy

Cited by in corpus (3)

• Mass Composition of UHECRs from $X_{\max }$ Distributions Recorded by the Pierre Auger and Telescope Array Observatories
• Multimuons in cosmic-ray events as seen in ALICE at the LHC
• Measuring temporal characteristics of the Cherenkov radiation signal from extensive air showers of cosmic rays with a wide field-of-view telescope addendum to the Yakutsk array