Abstract
view Abstract Citations (97) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Measurement of primary cosmic-ray electrons and positrons from 4 to 50 GeV. Buffington, A. ; Orth, C. D. ; Smoot, G. F. Abstract We have used a bremsstrahlung-identification technique to measure electron and positron spectra in the primary cosmic rays from 4 to 50 GeV. Above our average geomagnetic cutoff of 4.0 GV/c, we find fluxes of 4.4 (plus or minus 0.3) electrons and 0.37 (plus or minus 0.09 positrons) per sq m/sr/sec. The electron events follow a differential power law whose spectral index is 2.8 (plus or minus 0.1). Our ratio electrons/(electrons + positrons) = 0.08 (plus or minus 0.02) implies traversal of an equivalent slab thickness of 4.3 (plus or minus 1.5) g/sq cm of interstellar and source material. Publication: The Astrophysical Journal Pub Date: August 1975 DOI: 10.1086/153736 Bibcode: 1975ApJ...199..669B Keywords: Bremsstrahlung; Cosmic Ray Showers; Electron Flux Density; Positrons; Primary Cosmic Rays; Abundance; Balloon-Borne Instruments; Data Acquisition; Data Reduction; Energy Spectra; Interstellar Matter; Space Radiation full text sources ADS |
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