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Cosmic-Ray Proton and Helium Spectra above 50 GeV
Abstract
Differential energy spectra of cosmic-ray protons and He nuclei have been measured for the first time by an ionization spectrometer flown at balloon altitudes. The energy range extended from 50 to > 1000 GeV. The observed differential intensities can be represented with power-law spectra with a slope of -2.75 \ifmmode\pm\else\textpm\fi{} 0.03 for protons and of -2.77 \ifmmode\pm\else\textpm\fi{} 0.05 for He nuclei. The proton-to-He ratio is 26 \ifmmode\pm\else\textpm\fi{} 3 at 40 GeV/nucleon and is constant within errors up to 400 GeV/nucleon.
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Cited by
Aguilar, M., Alcaraz, J., Allaby, J., Alpat, B., Ambrosi, G., Anderhub, H., Ao, L., Arefiev, A., Azzarello, P., Babucci, E., et al. (2002) · Physics Reports · doi:10.1016/s0370-1573(02)00013-3 · Cited by 437
Atmospheric neutrino flux above 1 GeV
Agrawal, V., Gaisser, T. K., Lipari, P., & Stanev, T. (1996) · Physical Review D · doi:10.1103/physrevd.53.1314 · Cited by 317
Precise Measurement of Cosmic‐Ray Proton and Helium Spectra with the BESS Spectrometer
Sanuki, T., Motoki, M., Matsumoto, H., Seo, E. S., Wang, J. Z., Abe, K., Anraku, K., Asaoka, Y., Fujikawa, M., Imori, M., et al. (2000) · The Astrophysical Journal · doi:10.1086/317873 · Cited by 314
Self-citationAn improved model of galactic cosmic radiation for space exploration missions
Badhwar, G. D., & O'Neill, P. M. (1992) · International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements · doi:10.1016/1359-0189(92)90024-p · Cited by 149
Long-term modulation of galactic cosmic radiation and its model for space exploration
Badhwar, G. D., & O'Neill, P. M. (1994) · Advances in Space Research · doi:10.1016/0273-1177(94)90537-1 · Cited by 62
Metadata
- Authors
- Ryan, M. J., Ormes, J. F., & Balasubrahmanyan, V. K.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1972-04-10
- Volume
- 28
- Issue
- 15
- Pages
- 985-988
- ISSN
- 0031-9007 (ISSN-L)
- OpenAlex
- W3022888260
- Cited by
- 248
- References
- 0
- FWCI
- 18.03
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ryan, M. J., Ormes, J. F., & Balasubrahmanyan, V. K. (1972). Cosmic-Ray Proton and Helium Spectra above 50 GeV. Physical Review Letters. https://doi.org/10.1103/physrevlett.28.985
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