Energy cosmic ray muon spectrum at sea level and primary cosmic radiation spectrum

Cosmic ray muon spectrum at sea level is calculated for energy range 1-105 Gev. In the calculations the interaction cross-sections received in accelerator experiments are taken. For the lower part of energies the cross-sections have not scaling behaviour. For the higher part scaling takes place. The calculated spectrum is in good agreement with modern experimental one in all the considered energy range if we assume primary cosmic radiation spectrum to have a constant index γ=1.65+-0.05 in its power law representation in all considered energies interval. (author)