Precision Measurement of the (e+ + e-) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station.

Authors :: Aguilar, M.
Aisa, D.
Alpat, B.
Alvino, A.
Ambrosi, G.
Andeen, K.
Arruda, L.
Attig, N.
Azzarello, P.
Bachlechner, A.
Barao, F.
Barrau, A.
Banin, L.
Bartoloni, A.
Basara, L.
Battarbee, M.
Battiston, R.
Bazo, J.
Becker, U.
Behlmann, M.
Source :: Physical Review Letters. 11/28/2014, Vol. 113 Issue 22, p221102-1-221102-7. 7p.
Publication Year :: 2014
Abstract: We present a measurement of the cosmic ray (e+ + e-) flux in the range 0.5 GeV to 1 TeV based on the analysis of 10.6 million (e+ + e-) 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). [ABSTRACT FROM AUTHOR]

Subjects :: *COSMIC rays
*ALPHA magnetic spectrometers
*ALLOYS
*SPECTRUM analysis

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