Using a prototype of a large hadron calorimeter, vertical cosmic ray hadrons were recorded and the all-hadron flux was measured in the range from 5 GeV to 10 TeV. Hadron reconstruction and identification are described. We observe a vertical flux of dI/dEh=(1.59+or-0.24)*10-5(Eh/100 GeV)-2.72+or-0.10 (m2 s sr GeV)-1. The flux compares well with values obtained in other experiments. Total inelastic cross sections for protons scattered by nuclei in air are deduced from the unaccompanied hadron flux and compared with the values reported by other authors.

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With a prototype of a large hadron calorimeter, vertical cosmic-ray hadrons were recorded and the all-hadron flux was measured in the range from 10 GeV to 10 TeV. By means of a layer of scintillation counters, the neutral and charged components were identified and the ratio of neutral to charged hadrons could be extracted. From this ratio the charged-pion content is inferred using reasonable assumptions on the neutron-to-proton ratio. At the lower-energy end the data are compared firstly with existing results and secondly with theoretical calculations and Monte Carlo simulations.

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