A measurement of the absolute flux of cosmic-ray electrons

Details A measurement of the absolute flux of cosmic-ray electrons A measurement of the absolute flux of cosmic-ray electrons

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287..622g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 622-632.

Astronomy and Astrophysics

Astrophysics

61

Abundance, Cosmic Rays, Electron Radiation, Radiation Measurement, Balloon-Borne Instruments, Cerenkov Counters, Cosmic Ray Showers, Flux (Rate), Scintillation Counters, Spectrometers

Scientific paper

A balloon-borne superconducting magnet spectrometer was used to measure the absolute flux of cosmic-ray electrons. The instrument consisted of a gas Cerenkov detector, a momentum spectrometer, and a lead-scintillator shower counter. In order to determine electron flux in the interstellar medium, observed fluxes for energy loss in the atmosphere and the payload were corrected, taking into account solar modulation effects and bremsstrahlung energy losses. Fluxes were measured at an average atmospheric depth of 5.8 g/sq cm, and the solar modulation was 300 MeV. A cosmic-ray electron flux of 367 E to the exp(3.15 + or -0.2) per sq m/sr s GeV was obtained in the energy range 4.5-63.5 GeV. The uncertainty of the absolute (electron-positron) flux was 10 percent. A summary of the electron data is given in a table.

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