It’s widely known that a smoke detector is a good ionizing radiation source, as they contain a small amount of americium-241, a side product ... small amounts of plutonium-239, uranium-237 ...

Those charges alone will get someone locked up for quite a long time—throw in another conviction for trying to offload thousands of pounds of uranium and weapons-grade plutonium, and it’s ...

By deriving a probability distribution function for these events, researchers have been able to approximate solutions for burnup problems involving isotopes like plutonium-241 and uranium-238 ...