Air Shower

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Air Shower

A grouping of cosmic-ray particles observed in the atmosphere; a cascade shower in the

atmosphere. Also called

 shower  . 

Primary cosmic rays slowed down in the atmosphere emit bremsstrahlung photons of high energy. Each of these photons produces secondary electrons which generate more photons and the process continues until the available energy is absorbed.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use