Cosmic ray showers produced by muon bremsstrahlung

Abstract
A number of groups have observed air showers in the atmosphere at large zenith angles. The possibility of explaining these showers in terms of muon bremsstrahlung is examined; the expected shower size spectrum for this process is calculated and the method enables the sensitivity of shower frequency to high-energy muon intensity to be examined rather simply. Some problems associated with comparison of prediction with the experimental results are indicated. A tentative comparison indicates that when allowance is made for the effect of uncertainties in recorded shower size it is likely that the majority of the showers can be explained by muon bremsstrahlung.

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