First results of a cosmic-ray electron and positron spectrum from 10 GeV to 3 TeV is presented based upon observations with the CALET instrument on the International Space Station starting in October, 2015. Nearly a half million electron and positron events are included in the analysis. CALET is an all-calorimetric instrument with total vertical thickness of 30 X0 and a fine imaging capability designed to achieve a large proton rejection and excellent energy resolution well into the TeV energy region. The observed energy spectrum over 30 GeV can be fit with a single power law with a spectral index of -3.152Â±0.016 (stat+syst). Possible structure observed above 100 GeV requires further investigation with increased statistics and refined data analysis.
|Titolo:||Energy Spectrum of Cosmic-Ray Electron and Positron from 10 GeV to 3 TeV Observed with the Calorimetric Electron Telescope on the International Space Station|
BROGI, PAOLO [Membro del Collaboration Group]
|Rivista:||PHYSICAL REVIEW LETTERS|
|Citazione:||Adriani, O., Akaike, Y., Asano, K., Asaoka, Y., Bagliesi, M.G., Bigongiari, G., et al. (2017). Energy Spectrum of Cosmic-Ray Electron and Positron from 10 GeV to 3 TeV Observed with the Calorimetric Electron Telescope on the International Space Station. PHYSICAL REVIEW LETTERS, 119(18), 181101-1-181101-6.|
|Appare nelle tipologie:||1.1 Articolo in rivista|