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

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K. Izumi T. Maeno Y. Makida N. Matsui H. Matsumoto J. Nishimura M. Nozaki S. Orito M. Sasaki Y. Shikaze J. Suzuki K. Tanaka A. Yamamoto Y. Yamamoto K. Yamato T. Yoshida K. Yoshimura

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keywords protonspectraaltitudeantiprotoncosmic-raymountainobservedwere

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Cosmic-ray proton and antiproton spectra were measured at mountain altitude, 2770 m above sea level. We observed more than 2 x 10^5 protons and 10^2 antiprotons in a kinetic energy range between 0.25 and 3.3 GeV. The zenith-angle dependence of proton flux was obtained. The observed spectra were compared with theoretical predictions.

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Measurement of Cosmic-Ray Proton and Antiproton Spectra at Mountain Altitude

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