Radioactive emission from radium

Radioactive emission from radium

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This image is part of the feature Marie Curie Anniversary

Credit: C. POWELL, P. FOWLER & D. PERKINS/SCIENCE PHOTO LIBRARY

Caption: The radioactive emission of alpha particles from radium is dramatically illustrated in this photo. A speck of radium salt was placed on a special emulsion on a photographic plate; when developed, the emulsion reveals the dark tracks of alpha particles emitted by the radium. Radium is the most powerful radioactive substance known; it emits radiation a million times more intensely than uranium. It was discovered by Marie Curie in 1898.

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Keywords: alpha particles, alpha ray, atomic, black and white, black-and-white, emulsion photo, emulsion photograph, image, in physics, monochrome image, motion action, move movement moving, nuclear emulsion, nucleus, odyssey, particle, particle physics, radioactivity from, radioactivity made visible, radium

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