Plutonium from soviet smoke detectors is a common item for the element collectors subreddit. https://www.reddit.com/r/elementcollection/comments/w557i6/2_pluto

Plutonium from soviet smoke detectors is a common item for the element collectors subreddit. https://www.reddit.com/r/elementcollection/comments/w557i6/2_plutonium_239_sample_about_40_micrograms_from/ https://www.reddit.com/r/elementcollection/comments/w557i6/2...