Energy spectrum of surviving primary protons with energies (3÷30) TeV at 5200 m a.s.l. and the cross-section for proton-air-nucleus collisions

C. Aguirre, A. Trepp, G. R. Mejia, K. Murakami, K. Kamata, Y. Toyoda, T. Maeda, C. Yokoyama, P. K. MacKeown, K. Suga, K. Uchino, T. Kaneko

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Abstract

The energy spectrum of surviving primary cosmic-ray protons without collision in the atmosphere has been obtained from the observation of high-energy nuclear bursts produced by singly charged particles in the energy range 3 TeV to 30 TeV without accompanying air shower particles at Chacaltaya, Bolivia (5200 m a.s.l. or 550 gcm-2 atmospheric depth). Comparison of this spectrum with an extrapolation of the energy spectrum of primary cosmic-ray protons obtained by Ryan et al. to higher energies with the same exponent shows a logarithmic rise of the cross-section for proton-air-nucleus collisions from 3 TeV to 9 TeV.

Original languageEnglish
Pages (from-to)263-282
Number of pages20
JournalIl Nuovo Cimento B Series 11
Volume27
Issue number2
DOIs
StatePublished - Jun 1975

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