Physical Review Letters· 2013Q1
First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV
- 1,060citations
- Q1SCImago
- 2013year
Short summary
The Alpha Magnetic Spectrometer (AMS-02) on the ISS precisely measured the positron fraction in cosmic rays (0.5–350 GeV) using 6.8 million electron and positron events, revealing a steady increase up to ~250 GeV followed by a significant decrease in slope, with no fine structure or anisotropy.
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Nuclear and High Energy PhysicsPhysics and Astronomy