Primary cosmic-ray composition in the energy range of 1014 eV to 1016 eV and high-energy atmospheric cosmic rays observed with emulsion chambers at Mt. Kanbala

J. R. Ren, H. H. Kuang, A. X. Huo, S. L. Lu, S. Su, Y. X. Wang, C. R. Wang, M. He, N. J. Zhang, P. Y. Cao, J. Y. Li, S. Z. Wang, G. Z. Bai, Z. H. Liu, G. J. Li, G. X. Gang, W. D. Zhou, R. D. He, M. Amenomori, H. NanjoN. Hotta, I. Ohta, K. Mizutani, K. Kasahara, T. Yuda, M. Shibata, T. Shirai, N. Tateyama, Shoji Torii, H. Sugimoto, K. Taira

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Abstract

We report on the results of the measurements of energy spectra of atmospheric cosmic rays in the energy around 10 TeV measured with emulsion chambers at Mt. Kanbala (5500 m above sea-level, atmospheric depth 520 g/cm2). The power indices of the integral spectra take the values of 2.00±0.08 for gamma-rays and 1.90±0.10 for hadrons, in the energy range from 5 TeV to 20 TeV. Their intensities are compatible with those expected from the primary cosmic rays containing fewer protons than in the lower energy region. The energy spectrum of family events is also discussed with reference to the composition of primary cosmic rays. It is concluded that the portion of protons in the primary cosmic rays gradually decreases in the energy range from 1013 eV to 1015 eV.

Original languageEnglish
Pages (from-to)43-60
Number of pages18
JournalIl Nuovo Cimento C
Volume10
Issue number1
DOIs
Publication statusPublished - 1987 Jan
Externally publishedYes

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Keywords

  • Cosmic rays

ASJC Scopus subject areas

  • Ocean Engineering
  • Mechanical Engineering
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Engineering (miscellaneous)
  • Nuclear Energy and Engineering
  • Computer Science Applications
  • Chemical Engineering(all)

Cite this

Ren, J. R., Kuang, H. H., Huo, A. X., Lu, S. L., Su, S., Wang, Y. X., Wang, C. R., He, M., Zhang, N. J., Cao, P. Y., Li, J. Y., Wang, S. Z., Bai, G. Z., Liu, Z. H., Li, G. J., Gang, G. X., Zhou, W. D., He, R. D., Amenomori, M., ... Taira, K. (1987). Primary cosmic-ray composition in the energy range of 1014 eV to 1016 eV and high-energy atmospheric cosmic rays observed with emulsion chambers at Mt. Kanbala. Il Nuovo Cimento C, 10(1), 43-60. https://doi.org/10.1007/BF02508696