Integral energy spectrum of muons deep underground

Abstract

Latest measurements of the muon intensities on the ground surface in atmosphere, taken by different groups indicate that the muon intensities are 10%–15% lower than taken in old experiments. Changing dependencies of these intensities in function of zenithal angles are making it difficult to precise understanding those data. Independent group of measurement integral muon intensities on different levels underground are compared with muon intensities measured on the surface. The differences are the subject of this paper.