The Shape of EAS Lateral Distribution and Primary Composition of the UHE Cosmic Rays

Theoretical predictions for lateral distribution function of electrons in extensive air showers based on scaling formalism are presented. Our results are tested by comparison with AGASA experimental data taking into account the contribution of low-energy muons and simultaneously the effect of scintillation detectors response, according to recent simulation results. The possibility for ultrahigh energy cosmic ray primary composition deduction from the shape of LDF is discussed in detail.