It’s naturally radioactive, but its isotope uranium-235 also happens to be fissile, as Nazi nuclear chemists learned in 1938, ... causing the material to decay into uranium-233.

Although natural decay of U-235 means that this is unlikely to happen again, we humans have learned to take uranium ore and start a controlled fission process in reactors, beginning in the 1940s.

Both the two main isotopes—uranium-235 and uranium-238—decay by emitting alpha particles, which cause breakage of DNA double-strand when near biological tissues. Between 2008 and 2009, an ...

There are a two main types of Uranium, called isotopes, that are found in nature: Uranium-235 and Uranium-238. More than 99 per cent of all Uranium found on Earth is 238.

Letter: DU radiation. Published 10 May 2003. From Clive Semmens . I would like to comment on your excellent article on depleted uranium in Iraq (19 April, p 4).. Depleted uranium emits about 40 ...

The difference between uranium-238 and uranium-235. When we dig uranium out of the ground, 99.27 per cent of it is uranium-238, which has 92 protons and 146 neutrons.

The new uranium-214 isotope had a half-life of just half a millisecond, meaning that's the amount of time it takes for half of the radioactive sample to decay. The most common isotope of uranium ...

Geoneutrinos emitted during the decay of uranium-235 and potassium-40 are below the detection limits of the experiments, but they are not expected to contribute much because their relative ...

Nuclear power reactors need the uranium fuel to contain 3-20% U-235, depending on the reactor design; Nuclear weapons need U-235 to be enriched to around 90%. May 15, 2025 e-Paper.