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

AMS Collaboration

doi:10.1103/PhysRevLett.113.221102

Scientific article

Open access

English

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

ContributorsAMS Collaboration

CollaboratorsAzzarello, Philipp; Bourquin, Maurice; Cadoux, Franck; Habiby Alaoui, Marion; Leluc, Catherine; Li, Yang; Paniccia, Mercedes

; Pohl, Martin; Rapin, Divic Jean; Saouter, Pierre

Published inPhysical Review Letters, vol. 113, no. 22, 221102

Publication date2014

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 gamma= -3.170 +- 0.008(stat + sys) +- 0.008(energy scale).

Keywords

Cosmic rays
Positrons
Electrons
AMS
Space mission

Affiliation

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

AMS Collaboration. 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. In: Physical Review Letters, 2014, vol. 113, n° 22, p. 221102. doi: 10.1103/PhysRevLett.113.221102

Article (Published version)

Identifiers

PID : unige:98257
DOI : 10.1103/PhysRevLett.113.221102

ISSN of the journal0031-9007

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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

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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