Abstract

At the Pic du Midi (730 g cm-2) in France an air shower array has been operated to study high energy hadrons in air shower cores. The array consists of 13 scintillation counters of 0.25 m2 each and a 14 m2 high energy hadron detector. 2050 showers with a total of 1600 hadrons of energy E>100 GeV have been analysed. The energy spectrum of hadrons (E>300 GeV) is H(>E) approximately E- gamma with gamma =1.7+or-0.2 independent of shower size in the size range 105 E,r) approximately exp(-r/r0(>E)) with r0=2.4(E/200 GeV)-0.3+or-0.04 independent of shower size. It is not necessary to claim for large transverse momenta.

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