Cosmic ray antiproton spectrum measured by BESS in 1993-1995

J. Nishimura, H. Matsunaga, M. Motoki, A. Moiseev, K. Anraku, M. Imori, Y. Makida, H. Matsumoto, J. Mitchell, M. Nozaki, S. Orito, J. Ormes, M. Otoba, T. Saeki, T. Sanuki, R. Streitmatter, J. Suzuki, K. Tanaka, I. Ueda, N. YajimaT. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura

Research output: Contribution to journalArticlepeer-review


Balloon-borne experiments using a superconducting spectrometer were carried out successfully in northern Canada, in summer 1993 to 1995. In '93 flight, seven antiprotons were detected in the kinetic range between 200 and 600 MeV. The corresponding cosmic ray antiproton flux at the top of the atmosphere is found to be 6.4+5.5-3.5 × 10-3(m2 sr s GeV)-1. In '95 flight, improvement on the TOF resolution resulted to the observation of the forty antiprotons in the kinetic energy region 175 MeV to 1.3 GeV. The analysis on '95 flight is under way.

Original languageEnglish
Pages (from-to)771-774
Number of pages4
JournalAdvances in Space Research
Issue number5
Publication statusPublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)


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