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  • SPACE RADIATION  (4)
  • 1975-1979  (4)
  • 1950-1954
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  • 1
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    High-energy cosmic-ray electrons - A new measurement using transition-radiation detectors (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A new detector for cosmic-ray electrons, consisting of a combination of a transition-radiation detector and a shower detector, has been constructed, calibrated at accelerator beams, and exposed in a balloon flight under 5 g/sq cm of atmosphere. The design of this instrument and the methods of data analysis are described. Preliminary results in the energy range 9-300 GeV are presented. The energy spectrum of electrons is found to be significantly steeper than that of protons, consistent with a long escape lifetime of cosmic rays in the galaxy.
    Keywords: SPACE RADIATION
    Type: Physical Review Letters; 38; June 6
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Elemental composition of cosmic rays and cosmic ray electrons (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A summary of 40 papers on the elemental composition of cosmic rays and cosmic ray electrons is presented. Attention is given to experimental results concerning the 'anomalous component' of low energy cosmic radiation, the composition of ultraheavy cosmic rays, the energy dependence of cosmic ray composition at high energies (between 1 and 100 GeV/nucleon), and the energy spectrum of high-energy electrons.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Cosmic ray electrons - A discussion of recent observations (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A recent measurement of the spectrum of cosmic-ray electrons has provided statistically significant evidence for a spectral shape that is much steeper than that of protons. The electron spectrum does not fit well to a single power law, and the abundance of electrons relative to that of protons decreases from approximately 1% at 10 GeV to approximately 0.1% at 300 GeV. This result is consistent with a galactic escape lifetime for electrons exceeding 10 million years. The data are discussed in light of current models for the propagation of cosmic rays in the Galaxy, and conclusions are drawn concerning the consistency of various models with the observations.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Energy spectrum, time structure, and arrival direction of the 1976 August 16 cosmic gamma-ray burst - An observation at balloon altitude (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; vol. 222
    Format: text
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    NASA TECHNICAL REPORTS
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