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Precision Measurement of Cosmic-Ray Antiproton Spectrum
Open accessAbstract
The energy spectrum of cosmic-ray antiprotons ( &pmacr;'s) has been measured in the range 0.18-3.56 GeV, based on 458 &pmacr;'s collected by BESS in a recent solar-minimum period. We have detected for the first time a characteristic peak at 2 GeV of &pmacr;'s originating from cosmic-ray interactions with the interstellar gas. The peak spectrum is reproduced by theoretical calculations, implying that the propagation models are basically correct and that different cosmic-ray species undergo a universal propagation. Future BESS data with still higher statistics will allow us to study the solar modulation and the propagation in detail and to search for primary &pmacr; components.
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Metadata
- Authors
- Orito, S., Maeno, T., Matsunaga, H., Abe, K., Anraku, K., Asaoka, Y., Fujikawa, M., Imori, M., Ishino, M., Makida, Y., Matsui, N., Matsumoto, H., Mitchell, J., Mitsui, T., Moiseev, A., Motoki, M., Nishimura, J., Nozaki, M., Ormes, J., Saeki, T., Sanuki, T., Sasaki, M., Seo, E. S., Shikaze, Y., Sonoda, T., Streitmatter, R., Suzuki, J., Tanaka, K., Ueda, I., Yajima, N., Yamagami, T., Yamamoto, A., Yoshida, T., & Yoshimura, K.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2000-02-07
- Volume
- 84
- Issue
- 6
- Pages
- 1078-1081
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2110528861
- Cited by
- 283
- References
- 1
- FWCI
- 14.11
- Type
- journal article
- Language
- en
- Open access
- green
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- The paper
- Orito, S., Maeno, T., Matsunaga, H., Abe, K., Anraku, K., Asaoka, Y., Fujikawa, M., Imori, M., Ishino, M., Makida, Y., Matsui, N., Matsumoto, H., Mitchell, J., Mitsui, T., Moiseev, A., Motoki, M., Nishimura, J., Nozaki, M., Ormes, J., . . . Yoshimura, K. (2000). Precision Measurement of Cosmic-Ray Antiproton Spectrum. Physical Review Letters. https://doi.org/10.1103/physrevlett.84.1078
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