Precision measurement of cosmic ray anti-proton spectrum
Dec, 19994 pages
Published in:
- Phys.Rev.Lett. 84 (2000) 1078-1081
e-Print:
- astro-ph/9906426 [astro-ph]
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Abstract: (arXiv)
The energy spectrum of cosmic-ray antiprotons has been measured in the range 0.18 to 3.56 GeV, based on 458 antiprotons collected by BESS in recent solar-minimum period. We have detected for the first time a distinctive peak at 2 GeV of antiprotons 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 flights toward the solar maximum will help us to study the solar modulation and the propagation in detail and to search for primary antiproton components.- talk: Salt Lake City 1999/08/17
- anti-p: cosmic radiation
- cosmic radiation: energy spectrum
- cosmic radiation: flux
- anti-p p: ratio
- magnetic spectrometer: experimental results
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