Recent measurements of the muon component of large cosmic ray air showers

Abstract

Measurements are reported for the lateral distribution of muons of energy greater than 1 GeV in large air showers. The measurement which was made with the modified Haverah Park spectrograph extends from core distances of 30-600 m and is in satisfactory agreement with the results of computer simulations. Data on the differential momentum spectra of muons at core distances of 200-600 m in large air showers are reported which are in good agreement with the results of recent computer simulations and do not show the excess of distant energetic muons which featured in earlier measurements.