Alpha Decay

Definition

Alpha decay is a type of radioactive decay where an alpha particle is emitted from an unstable atomic nucleus. This process reduces both the atomic number and mass number of the parent nucleus.

Related terms

Beta Decay:

A type of radioactive decay where either an electron or positron is emitted from an unstable atomic nucleus.

Gamma Decay:

A type of radioactive decay where high-energy gamma rays are emitted from an excited atomic nucleus.

Nuclear Stability: Refers to whether or not an atomic nucleus will undergo radioactive decay based on its neutron-to-proton ratio.