Energy spectra of atmospheric cosmic rays observed with emulsion chambers

M. Akashi*, M. Amenomori, E. Konishi, H. Nanjo, Z. Watanabe, M. Ichiju, K. Mizutani, K. Kasahara, Shoji Torii, T. Yuda, T. Shirai, N. Tateyama, T. Taira, I. Mito, M. Shibata, H. Sugimoto, K. Taira, N. Hotta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


The energy spectra of gamma-rays, hadrons and muons in the atmosphere are summarized on the basis of the emulsion chamber experiments at Mt. Fuji and underground. The power indices of the spectra are 1.95±0.05 for gamma-rays and 1.80±0.07 for hadrons at Mt. Fuji in the energy range from 2 TeV to 50 TeV. The underground measurements have confirmed the muon spectrum at sea-level with the index of 2.70±0.10 in the range from 1 TeV to 10 TeV. These spectra of atmospheric cosmic rays are not explained simultaneously on the basis of the concept of scaling so long as the primary spectrum with the normal composition holds up to 1015eV.

Original languageEnglish
Pages (from-to)355-375
Number of pages21
JournalIl Nuovo Cimento A
Issue number3
Publication statusPublished - 1981 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics


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