Relative abundance of antiprotons and antihelium in the primary cosmic radiation

THE importance of determining the abundance of antiparticles in the primary cosmic rays has already been discussed 1 : for example, Steigman has considered the value of p̄ as a probe in distinguishing various propagation models. We report here on the measurement of p̄/p and H̄e/He in the 4–100 GeV/...

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Bibliographic Details
Published in:Nature (London) 1978-07, Vol.274 (5667), p.137-139
Main Authors: BADHWAR, G. D, GOLDEN, R. L, LACY, J. L, ZIPSE, J. E, DANIEL, R. R, STEPHENS, S. A
Format: Article
Language:English
Subjects:
Humanities and Social Sciences
letter
multidisciplinary
Science
Science (multidisciplinary)
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Summary:THE importance of determining the abundance of antiparticles in the primary cosmic rays has already been discussed 1 : for example, Steigman has considered the value of p̄ as a probe in distinguishing various propagation models. We report here on the measurement of p̄/p and H̄e/He in the 4–100 GeV/ c range made from a balloon flight in May 1976 of a superconducting magnet spectrometer from Palestine, Texas, under 5,8 g cm −2 of residual atmosphere. The upper limits derived are the most stringent to date.
ISSN:0028-0836
1476-4687
DOI:10.1038/274137b0