Energy spectrum of cosmic-ray muons at sea level

Abstract

The integral energy spectrum of cosmic-ray muons at sea level in the energy range (200÷7500) GeV is deduced from the results obtained by us (as reported in an earlier paper) on the variation of vertical cosmic-ray intensity with depth in the range (800÷8400) m w.e. In doing this, the effect of fluctuations in the energy losses of muons is taken into account. The deduced muon energy spectrum is compared with direct magnet spectrograph observations and with the muon energy spectrum deduced by the Bristol group from their observations on γ-ray cascades at high altitudes. The exponents of the integral production spectra of parents of muons are given and an upper limit to the energy losses of muons in nuclear collisions is set.