Abstract
The lateral distribution function of muons with the threshold Eμ ≈ 0.5secθ GeV (θ is the zenith angle) in extensive air showers with energy E0 ≥ 1017 eV has been examined using a new detector located at a distance of 180 m from the center of the Yakutsk array. This detector has been operating since autumn 2012 and consists of 27 autonomous scintillator counters with an area of 2 m2. The experimental data have been compared to the calculations within the QGSJET-01 model with the CORSIKA air shower simulator. Agreement between the experimental data and calculations is achieved for the mixed composition of cosmic rays with the average atomic number satisfying the condition 〈lnA〉 ≈ 2.84 ± 0.08.
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