Measurements of proton, helium and muon spectra at small atmospheric depths with the BESS spectrometer

K. Abe*, T. Sanuki, K. Anraku, Y. Asaoka, H. Fuke, S. Haino, N. Ikeda, M. Imori, K. Izumi, T. Maeno, Y. Makida, S. Matsuda, N. Matsui, T. Matsukawa, H. Matsumoto, J. W. Mitchell, A. A. Moiseev, J. Nishimura, M. Nozaki, S. OritoJ. F. Ormes, M. Sasaki, E. S. Seo, Y. Shikaze, T. Sonoda, R. E. Streitmatter, J. Suzuki, K. Tanaka, K. Tanizaki, T. Yamagami, A. Yamamoto, Y. Yamamoto, K. Yamato, T. Yoshida, K. Yoshimura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


The cosmic-ray proton, helium, and muon spectra at small atmospheric depths of 4.5-28 g/cm2 were precisely measured during the slow descending period of the BESS-2001 balloon flight. The variation of atmospheric secondary particle fluxes as a function of atmospheric depth provides fundamental information to study hadronic interactions of the primary cosmic rays with the atmosphere.

Original languageEnglish
Pages (from-to)8-20
Number of pages13
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 2003 Jun 3
Externally publishedYes


  • Atmospheric muon
  • Atmospheric neutrino
  • Cosmic-ray helium
  • Cosmic-ray proton
  • Superconducting spectrometer

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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