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Relative abundance of antiprotons and antihelium in the primary cosmic radiationThe paper reports measurement of the antiproton-to-proton and antihelium-to-helium ratios in the 4-100 GeV/c range. A superconducting magnet spectrophotometer obtained the data during a balloon flight in May 1976. The upper limit value for the antiproton ratio is 0.0005 in the 4.2-12.5 GeV/c range. This value is only slightly higher than the expected value for a leaky box-model and nearly equal to the value expected in the Peter-Westergard model. It is suggested that this upper limit value rules out the closed galaxy model. Upper limit values for the antihelium ratio are 0.000058 in the 4-10 GeV/c range; less than 0.0001 in the 4-33 GeV/c range; and less than 0.01 in the 33-100 GeV/c range. The interpretation of the raw data is explained.
Document ID
19780060010
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Badhwar, G. D.
(Tata Inst. of Fundamental Research Bombay, India)
Golden, R. L.
(Tata Inst. of Fundamental Research Bombay, India)
Lacy, J. L.
(Tata Inst. of Fundamental Research Bombay, India)
Zipse, J. E.
(NASA Johnson Space Center Houston, Tex., United States)
Daniel, R. R.
(Tata Inst. of Fundamental Research Bombay, India)
Stephens, S. A.
(Tata Institute of Fundamental Research Bombay, India)
Date Acquired
August 9, 2013
Publication Date
July 13, 1978
Publication Information
Publication: Nature
Volume: 274
Subject Category
Space Radiation
Accession Number
78A43919
Distribution Limits
Public
Copyright
Other

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