# Ultrahigh-Energy Cosmic Rays: Results and Prospects

@article{Kampert2013UltrahighEnergyCR,
title={Ultrahigh-Energy Cosmic Rays: Results and Prospects},
author={K-H. Kampert},
journal={Brazilian Journal of Physics},
year={2013},
volume={43},
pages={375-382}
}
• K. Kampert
• Published 10 May 2013
• Physics
• Brazilian Journal of Physics
Observations of cosmic rays have been improved at all energies, both in terms of higher statistics and reduced systematics. As a result, the all-particle cosmic ray energy spectrum starts to exhibit more structures than could be seen previously. Most importantly, a second knee in the cosmic ray spectrum—dominated by heavy primaries—is reported just below 1017 eV. The light component, on the other hand, exhibits an ankle-like feature above 1017 eV and starts to dominate the flux at the ankle…
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