Particle radiation

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Particle radiation refers to any stream of subatomic particles. The particles refered to are usually parts of atoms. Examples of particle radiation are beta particles, which are actuall electrons. Helium nuclei, the center of Helium atoms, when in motion are called Alpha particles. These particle radiations are usually the result of spontaneous radioactive decay, but can be produced in other ways. Cosmic rays are subatomic particles falling naturally on the earth. Most originate in the Sun and is part of the solar wind.