'U-234' is one of the
isotopes of uranium. In
natural uranium,
234U occurs as the
decay product of
238U, but makes up only 0.0055% of the uranium because its
halflife of 246,000 years is only about 1/18,000 as long as the halflife of
238U.
Extraction of
234U from natural uranium is not feasible. Pure U-234 can be extracted (by
ion exchange) from pure
plutonium-238 which has been aged to allow some of it to decay to
234U.
Enriched uranium contains more U-234 than natural uranium, though this does not bring any benefits. Similarly,
depleted uranium contains almost no U-234, which contributes to its low radioacivity when compared to natural uranium.
See also
★
Uranium-uranium dating