Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01

Abstract

A measurement of the cosmic ray positron fraction e$^/(e$+e) in the energy range of 1 30 GeV is presented. The measurement is based on data taken by the AMS-01 experiment during its 10 day Space Shuttle flight in June 1998. A proton background suppression on the order of 10$^6$ is reached by identifying converted bremsstrahlung photons emitted from positrons.

Publication
Physics Letters B

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