Ultrahigh Energy Cosmic Rays Detection
arXiv:astro-ph/0509122 · doi:10.1063/1.2125661
Abstract
The paper describes methods used for the detection of cosmic rays with energies above 10^18 eV (UHECR, UltraHigh Energy Cosmic Rays). It had been anticipated there would be a cutoff in the energy spectrum of primary cosmic rays around 3 10^19 eV induced by their interaction with the 2.7 K primordial photons. This has become known as the GZK cutoff. However, several showers have been detected with estimated primary energy exceeding this limit.
4 pages, 4 figures. To appear in the proceedings of 17th Conference on High Energy Physics (IFAE 2005) (In Italian), Catania, Italy, 30 Mar - 2 Apr 2005