Precision Measurement of the (e[superscript +] + e[superscript −) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station
Name
PhysRevLett.113.221102.pdf
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Author(s)
Aguilar, M.
Aisa, D.
Alpat, B.
Alvino, A.
Ambrosi, G.
Andeen, K.
Arruda, L.
Attig, N.
Azzarello, P.
Bachlechner, A.
Date Issued
November 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aguilar, M., D. Aisa, B. Alpat, A. Alvino, G. Ambrosi, K. Andeen, L. Arruda, et al. “Precision Measurement of the (e[superscript +] + e[superscript −) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station.” Physical Review Letters 113, no. 22 (November 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We present a measurement of the cosmic ray (e[superscript +] + e[superscript -]) flux in the range 0.5 GeV to 1 TeV based on the analysis of 10.6 million (e[superscript +] + e[superscript -]) events collected by AMS. The statistics and the resolution of AMS provide a precision measurement of the flux. The flux is smooth and reveals new and distinct information. Above 30.2 GeV, the flux can be described by a single power law with a spectral index γ = -3.170 ± 0.008(stat + syst) ± 0.008(energy scale).
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.113.221102
