Computer Science
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sciam.239...60l&link_type=abstract
Scientific American, vol. 239, July 1978, p. 60-70.
Computer Science
4
Cosmic Ray Showers, Energetic Particles, High Energy Interactions, Radiation Detectors, Gamma Rays, Pions, Radiation Counters, Radiation Sources, Secondary Cosmic Rays, Spectral Energy Distribution, Trajectory Analysis
Scientific paper
Some cosmic-ray particles have an energy far higher than that of the fast particles generated by the largest accelerating machines yet built. The most energetic cosmic rays observed so far have had energies of two or three times 10 to the 20th power electron volts. Difficulties concerning the study of these particles are related to the very low intensity of cosmic radiation and the earth's atmosphere which tends to prevent the primary cosmic rays from reaching ground level. Attention is given to the origin of air showers, the detection of air showers by a giant array of detectors, the intensity map of a very large air shower, the arrival-time map of the same air shower, the energy spectrum of the most energetic primary cosmic rays, the longitudinal development of an air shower, and the Fly's Eye detector which, when completed, will monitor the sky for cosmic-ray showers. Arrival directions of the 16 most energetic showers registered by the Haverah Park array since 1963 provide convincing evidence that the most energetic cosmic rays originate outside the Galaxy.
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