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| Secondary Cosmic Rays Showers Who1 #722855 When cosmic rays enter the Earth's atmosphere, they collide with atoms and molecules, mainly oxygen and nitrogen. The interaction produces a cascade of lighter particles, a so-called air shower secondary radiation that rains down, including x-rays, protons, alpha particles, pions, muons, electrons, neutrinos, and neutrons. All of the secondary particles continue onward on paths within about one degree of the primary particle's original path, and are detected by observatories. | |
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