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[[Image:Bdecay.png|right|thumb|300px|The [[Feynman diagram]] for the beta decay of a neutron into a proton, electron, and electron antineutrino via an intermediate heavy W- boson]]

[[Image:Bdecay.png|right|thumb|300px|The [[Feynman diagram]] for the beta decay of a neutron into a proton, electron, and electron antineutrino via an intermediate heavy W- boson]]

'''Beta Decay''' is the emission of either an [[electron]] or a [[positron]] from the nucleus of an atom.<ref>http://lbl.gov/abc/wallchart/chapters/03/2.html</ref>

'''Beta Decay''' is the emission of either an [[electron]] or a [[positron]] from the nucleus of an atom.<ref>http://lbl.gov/abc/wallchart/chapters/03/2.html</ref>