Beta Decay 3.2 beta

In nuclear physics,beta decay is a type of radioactive decay in which a beta particle (an electron or a positron) is emitted. In the case of electron emission, it is referred to as beta minus (β−
), while in the case of a positron emission as beta plus (β
). In electron emission, an electron antineutrino is also emitted, while positron emission is accompanied by an electron neutrino.
Beta decay is mediated by the weak force.