Measurement of cosmic-ray proton and antiproton spectra at mountain altitude

T. Sanuki, M. Fujikawa, H. Matsunaga, K. Abe, K. Anraku, H. Fuke, S. Haino, M. Imori, K. Izumi, T. Maeno, Y. Makida, N. Matsui, H. Matsumoto, J. Nishimura, M. Nozaki, S. Orito, M. Sasaki, Y. Shikaze, J. Suzuki, K. TanakaA. Yamamoto, Y. Yamamoto, K. Yamato, T. Yoshida, K. Yoshimura

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Energy spectra of atmospheric secondary cosmic-ray protons and antiprotons were measured at mountain altitude, 2770 m above sea level. We observed more than 105 protons and 102 antiprotons. Our proton spectrum is generally consistent with other previous measurements. The observed antiproton spectrum suggests that the energy loss due to non-annihilation processes is less significant than that assumed in previous model calculations.

Original languageEnglish
Pages (from-to)10-17
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - Dec 18 2003
Externally publishedYes


  • Atmospheric cosmic ray
  • Cosmic-ray antiproton
  • Cosmic-ray proton
  • Superconducting spectrometer

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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