Multiple muons in the Utah detector. I. Measurement

Abstract

Final and more extensive data on multiple-muon events deep underground in the Utah muon detector are presented as rates for multiplicities 1 to 5 in a fiducial plane of 80 ${\mathrm{m}}^{2}$. New results are presented for showers having muon multiplicities from 10 to 50 in a fiducial plane of 100 ${\mathrm{m}}^{2}$. The measurements are taken at depths ranging from a minimum of 1.5\ifmmode\times\else\texttimes\fi{}${10}^{5}$ g ${\mathrm{cm}}^{\ensuremath{-}2}$ to a maximum of 1.0\ifmmode\times\else\texttimes\fi{}${10}^{6}$ g ${\mathrm{cm}}^{\ensuremath{-}2}$. The energy per nucleon of the primaries which create the muon shower ranges from ${10}^{13}$ to ${10}^{16}$ eV.