Results 191 to 200 of about 22,727 (221)

Ultra-High-Energy Cosmic Rays

Physics and High Technology, 2018
The origin of ultra-high energy cosmic rays (UHECRs) is a long-standing mystery in astrophysics. Two collaborations are running experiments, the Telescope Array in the northern hemisphere and the Pierre Auger Observatory in the southern hemisphere, recording the signals coming from the extensive air showers made by the most energetic particles observed
openaire   +1 more source

The Puzzle of the Ultra-High Energy Cosmic Rays

International Journal of Modern Physics A, 2002
In early years the cosmic ray studies were ahead of the accelerator research, starting from the discovery of positrons, through muons, to that of pions and strange particles. Today we are facing the situation that the puzzling saga of cosmic rays of the highest energies may again unfold in the discovery of new physics, now beyond the Standard Model ...
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Cosmic rays of ultra-high energy

Contemporary Physics, 1981
Abstract There falls on the Earth's atmosphere a rain of particles and photons the high energy part of which is termed the Cosmic Radiation. This article is concerned specifically with primary particles of the highest known energies, i.e. 1017-1020eV and deals with the evidence for their existence, their nature and their origin. Such particles are very
G. D. Rochester, K. E. Turver
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Ultra high energy cosmic rays

Journal of Physics G: Nuclear and Particle Physics, 2007
Despite detailed examination and discussion there is still argument about the cosmic ray (CR) particle energy which marks the dividing line between particles primarily of galactic energy and those of extragalactic origin. Our own view (e.g. Wibig and Wolfendale 2005 J. Phys. G: Nucl. Part. Phys.
Tadeusz Wibig, Arnold W Wolfendale
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Constraints on the ultra-high energy cosmic ray output of gamma-ray bursts

open access: yesMonthly Notices of the Royal Astronomical Society
Ultra-high energy cosmic rays are the most extreme energetic particles detected on Earth, however, their acceleration sites are still mysterious. We explore the contribution of low-luminosity gamma-ray bursts to the ultra-high energy cosmic ray flux ...
B Gendre   +2 more
exaly   +2 more sources

Ultra high energy cosmic rays and ultra high energy γ-rays

Advances in Space Research, 1984
Abstract Evidence on the energy spectrum, mass composition and anisotropy of cosmic rays above 10 14 eV is briefly surveyed and it is shown that the data are consistent with all cosmic rays below 10 19 eV being of galactic origin. Results from the new field of γ-ray astronomy above 10 15 eV are described and implications for the origin of cosmic ...
openaire   +1 more source

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