Alpha, Stopped by paper, Beta, Stopped by aluminium, Gamma, Needs lead shielding, Alpha particle, Helium nucleus, Beta particle, Fast-moving electron, Gamma ray, High-energy electromagnetic wave, Alpha particle, Strongly ionising, Gamma wave, Most penetrating, Radioactivity, Emission from unstable nuclei, Half-life, Time for half the nuclei to decay, Carbon-14, Dating ancient remains, Iodine-131, Thyroid diagnosis, Cobalt-60, Cancer treatment, Americium-241, Smoke detectors, Technetium-99m, Medical imaging, Activity, Becquerel (Bq), Absorbed dose, Gray (Gy), Equivalent dose, Sievert (Sv), Dosimeter, Measures radiation exposure, Background radiation, Always present, Shielding, Using lead or concrete, Distance, Moving away from the source, Time, Reducing exposure duration, Alpha radiation, Dangerous inside the body, Gamma radiation, Dangerous outside the body
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Radiation
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Mbeverley1
Secondary
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