Alpha particle

Alpha particles or alpha rays (named after the first letter in the greek alphabet) are a form of particle radiation which are highly ionizing and have low penetration. They consist of two protons and two neutrons bound together into a particle that is identical to a helium nucleus, and can be written as He2+.

References

• {{Book reference | Author=Tipler, Paul; Llewellyn, Ralph | Title=Modern Physics (4th ed.) | Publisher=W. H. Freeman | Year=2002 | ID=ISBN 0716743450}}