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Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01 (2007)

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 details
Download http://hal.in2p3.fr/in2p3-00135938/en/
Publisher HAL - CCSd - CNRS
Contributors Claudine Tur
Repository CCSd/HAL : e-articles server (based on gBUS) (France)
Keywords Physics/Astrophysics, Sciences of the Universe/Astrophysics
Type ART_ACL