Alpha Particles 33
Alpha Particles 33 :
Alpha particles have a very short range in air and a very low ability to penetrate other materials, but also have a strong ability to ionize materials. Alpha particles are unable to penetrate even the thin layer of dead cells of human skin and consequently are not an external radiation hazard. Alpha-emitting nuclides inside the body as a result of inhalation or ingestion are a considerable internal radiation hazard
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