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  • Other Sources  (3)
  • SPACE RADIATION  (3)
  • 1985-1989  (3)
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  • Other Sources  (3)
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  • 1
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    Unknown
    Interstellar propagation and the isotopic composition of hydrogen in the galactic cosmic rays (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Preliminary results of a study of the propagation of the quartet of stable isotopes of hydrogen and helium are reported. A mean pathlength of 7.5 + or - 0.5 g/sq cms at approximately 300 MeV/nucleon is required to explain the low energy deuterium spectrum. This pathlength is consistent with pathlengths derived from the elements with Z 2, but is a (He-3/He-4) measurement of Jordan and P. Meyer (1984). The propagation calculations reported here incorporate the preliminary results of an updated nuclear interaction cross section survey covering the period since the review by J. P. Meyer (1972).
    Keywords: SPACE RADIATION
    Type: OG-4.2-1 , 19th Intern. Cosmic Ray Conf - Vol. 2; p 56-59; NASA-CP-2376-VOL-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Galactic cosmic ray hydrogen and helium (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper provides a summary of the spectra and propagation of the quartet of isotopes of hydrogen and helium which occur in arriving cosmic radiation. The unraveling of modulation effects is addressed, and the calculation of the local interstellar spectrum from a model of interstellar propagation is discussed. Two models for propagation are considered, one having an energy-independent mean pathlength and the other having an energy-dependent one.
    Keywords: SPACE RADIATION
    Type: Genesis and propagation of cosmic rays; Jun 01, 1986 - Jun 09, 1986; Erice; Italy
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    New limit on the low-energy antiproton/proton ratio in the Galactic cosmic radiation (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Results are presented from a balloon-borne apparatus searching for low-energy antiprotons in the Galactic cosmic rays. For energies less than 640 MeV at the top of the atmosphere, no cosmic-ray antiprotons were observed. This yields an upper limit to the antiproton/proton ratio of 0.000046 at the 85-percent confidence level.
    Keywords: SPACE RADIATION
    Type: Physical Review Letters (ISSN 0031-9007); 61; 145-148
    Format: text
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    NASA TECHNICAL REPORTS
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