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
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