Abstract
view Abstract Citations (24) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Energy Dependence of the Positron-Electron Ratio in the Primary Cosmic Radiation in 1965 Hartman, R. C. Abstract The charge composition of the primary electron component has been investigated in the energy range from 200 MeV to 10 BeV with a balloon-borne magnetic spectrometer. The fraction of positrons N+/ (N+ + N-) is found to be 0.35 + 0.10 between 200 and 500 MeV, and decreases to 0.07 + 0.05 between 2 and S BeV. An upper limit of 0.20 is obtained between S and 10 BeV. Below 200 MeV the high flux of atmospheric secondary electrons and positrons prevents a determination of the primary positron fraction. The results however indicate the presence of a flux of negative primary electrons between 50 and 200 MeV. Publication: The Astrophysical Journal Pub Date: November 1967 DOI: 10.1086/149341 Bibcode: 1967ApJ...150..371H full text sources ADS |
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