Sorting Out the Alphas, Betas and Gammas of Radiation

Rainwater containing elevated levels of radioactivity has been detected in the U.S., an effect of the ongoing nuclear crisis in Japan. Stephen Sugarman of the Oak Ridge Institute for Science and Education explains the basics of radiation terminology, and describes what's actually in radioactively contaminated water, milk or vegetables.

Source: http://www.npr.org/2011/04/01/135042044/sorting-out-the-alphas-betas-and-gammas-of-radiation?ft=1&f=1007

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