Observation of cosmic ray positrons in the region from 5 to 50 GeV

Details Observation of cosmic ray positrons in the region from 5 to 50 GeV Observation of cosmic ray positrons in the region from 5 to 50 GeV

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...188..145g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 188, no. 1, Dec. 1987, p. 145-154. Research supported by the Lockheed Electron

Astronomy and Astrophysics

Astrophysics

55

Astronomical Spectroscopy, Cosmic Rays, Magnetic Spectroscopy, Positrons, Astronomical Models, Cosmic Ray Showers, Data Processing

Scientific paper

The absolute flux of cosmic ray positrons has been measured using a balloon-borne magnet-spectrometer. Based on 193 positrons observed from 3.57 GV/c to 50 GV/c rigidity at the payload, the integral flux about 5 GeV kinetic energy at the top of the atmosphere is found to be (0.33±0.07)e+/m2-str-s. At the top of the atmosphere the effective energy interval for the observation is 4.5 to 64 GeV. In this interval the best-fit differential flux is 16E-(3.0±0.3)e+/(m2-str-sec-GeV). The quoted errors do not include a possible 10% systematic uncertainty in the exposure factor. The ratio e+/(e++e-) was found to be 0.069±0.014 above 5 GeV. The authors compare these results with other observations and theoretical predictions.

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