The Earth is exposed to a permanent rain of cosmic particles from outer space. Most of the particles are fully ionised atomic nuclei, moving with relativistic energies. The bulk of them with energies up to 10^17 eV originate within our Milky Way. They are most likely accelerated in supernova remnants. Some particles have a thousand times higher energies, i.e., around 10^20 eV. This corresponds to the kinetic energy of a tennis ball with a mass of 50 g and a velocity of 90 km/h.

Hörandel, J.R., Abreu, P., Aglietta, M., Ahlers, M., Ahn, E.J., Albuquerque, I.F.M., et al. (2012). The nature and origin of ultra high-energy cosmic rays. EUROPHYSICS NEWS, 43, Number 3, 24-27 [10.1051/epn/2012302].

The nature and origin of ultra high-energy cosmic rays

G. Marsella;
2012-06-01

Abstract

The Earth is exposed to a permanent rain of cosmic particles from outer space. Most of the particles are fully ionised atomic nuclei, moving with relativistic energies. The bulk of them with energies up to 10^17 eV originate within our Milky Way. They are most likely accelerated in supernova remnants. Some particles have a thousand times higher energies, i.e., around 10^20 eV. This corresponds to the kinetic energy of a tennis ball with a mass of 50 g and a velocity of 90 km/h.
giu-2012
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
Hörandel, J.R., Abreu, P., Aglietta, M., Ahlers, M., Ahn, E.J., Albuquerque, I.F.M., et al. (2012). The nature and origin of ultra high-energy cosmic rays. EUROPHYSICS NEWS, 43, Number 3, 24-27 [10.1051/epn/2012302].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/706360
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