‘Beta particles (β) are high energy, high-speed electrons (β^–) or positrons (β⁺) that are ejected from the nucleus by some radionuclides during a form of radioactive decay called beta decay. Beta decay is a type of radioactive decay in which a proton is transformed into a neutron or vice versa inside the nucleus of the radioactive sample.

Many beta emitters occur naturally in the radioisotopes found in the natural radioactive decay chains of uranium, thorium and actinium. Examples include lead-210,bismuth-214 and thallium-206.

Uses of Beta Particles/Radiation
1. They are used as thickness detectors for the quality control of thin materials such as paper.

2. They are used in phosphorescent lighting typically for emergency lighting as it requires no power

3. They are used for the treatment of eye and bine cancer