How are people exposed to beta particles?
There are both natural and man-made beta emitting radionuclides. Potassium-40 and carbon-14 are weak beta emitters that are found naturally in our bodies. Some decay products of radon emit beta particles, but its alpha-emitting decay products pose a much greater health risk. Beta emitters that eject energetic particles can pose a significant health concern. Their use requires special consideration of both benefits and potential, harmful effects. • Key beta emitters used in medical imaging, diagnostic and treatment procedures are phosphorus-32, and iodine-131. For example, people who have taken radioactive iodine will emit beta particles. They must follow strict procedures to protect family members from exposure. • Radioactive iodine may enter the environment during a nuclear reactor accident and find its way into the food chain. • Industrial gauges and instruments containing concentrated beta-emitting radiation sources can be lost, stolen, or abandoned. If these instruments then enter
