Abstract
This chapter discusses various aspects of alpha radiation, which is made up of alpha particles. Examples of alpha decay are provided together with calculations of the alpha decay energy (Qα) utilizing Einstein's equation for the equivalence of mass and energy. Nuclear recoil in alpha-particle emission is described and calculated. The relationship of alpha decay energy and radionuclide half-life is described. The mechanisms of ionization and electron excitation, whereby alpha particles, as well as other charged particles, dissipate their energy in matter, are discussed. The high mass and charge of an alpha particle, relative to other forms of nuclear radiation, are reviewed together with its greater ionization power and poorer ability to penetrate matter. The chapter also presents the empirical formulas for deriving the range of alpha particles in liquids, solids, and air.
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