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Alpha Particle

(essentially a helium nucleus stemming from radioactivity)

An Alpha Particle is a Particle emitted during a nuclear reaction, such as Radioactive Decay. It specifically consists of two protons and two neutrons, i.e., it is a Helium nucleus. This is in contrast to a Beta Particle, similarly emitted, but consisting of an electron or positron.

Collisions of alpha or beta particles with a nucleus can also create nuclear reactions, e.g., Alpha Capture.

Cosmic Rays include alpha and beta particles.


(physics,particle)
http://en.wikipedia.org/wiki/Alpha_particle

Referenced by:
Alpha Capture
Alpha Element
Alpha Process
Particle Spectrometer
Rosetta

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