Alphaparticles - Blog Posts

Well TECHNICALLY it’s a helium-4 nucleus

I guess I can see where the confusion comes from

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Radioactivity, beautifully visualized

You’re looking at the tracks of radioactivity – mostly alpha rays, I think – emitted from a chunk of uranium ore placed in a cloud chamber. Alpha particles, and also beta particles, strip away electrons when they collide with atoms in the air inside the cloud chamber, leaving those atoms positively charged, or ionized. Alcohol vapor condenses on the ions, leaving a vapor trail that marks the path of the alpha ray. 

An outfit calling itself Cloudy Labs put the video up on YouTube a while back.