a nuclear particle emitted by many radionuclides during decay
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Beetaosakesed levivad õhus mõne meetri kaugusele, kuid nende läbistusvõime on väike. Nahka või kehasse tungides võivad nad tekitada raskeid vigastusi.
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Beta particles have a few metres range in air but poor powers of penetration. Where deposited on the skin or taken into the body they may cause significant injury.
