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

Stanislav Knurenko, Igor Petrov

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…