Uraan-235

'n Skyf uraan wat met uraan-235 verryk is.

Uraan-235 (U-235) is 'n isotoop van uraan wat ongeveer 0,72% van natuurlike uraan beslaan. Anders as uraan-238 is hierdie isotoop kernsplytbaar; dit kan wel onderhou word deur die splitsing van atoomkerne in 'n kernkettingreaksie.

Natuurlike vervalketting

$\begin{array}{c}{}^{235}{}_{92}U->[\alpha ][7.038\times 10^{8}y]{}^{231}{}_{90}Th->[{\beta }^{-}][25.52h]{}^{231}{}_{91}Pa->[\alpha ][3.276\times 10^{4}y]{}^{227}{}_{89}Ac\left\{\begin{array}{c}->[98.62\mathrm{\%}{\beta }^{-}][21.773y]{}^{227}{}_{90}Th->[\alpha ][18.718d]\\ ->[1.38\mathrm{\%}\alpha ][21.773y]{}^{223}{}_{87}Fr->[{\beta }^{-}][21.8min]\end{array}\right\}{}^{223}{}_{88}Ra->[\alpha ][11.434d]{}^{219}{}_{86}Rn\\ {}^{219}{}_{86}Rn->[\alpha ][3.96s]{}^{215}{}_{84}Po->[\alpha ][1.778ms]{}^{211}{}_{82}Pb->[{\beta }^{-}][36.1min]{}^{211}{}_{83}Bi\left\{\begin{array}{c}->[99.73\mathrm{\%}\alpha ][2.13min]{}^{207}{}_{81}Tl->[{\beta }^{-}][4.77min]\\ ->[0.27\mathrm{\%}{\beta }^{-}][2.13min]{}^{211}{}_{84}Po->[\alpha ][0.516s]\end{array}\right\}{}^{207}{}_{82}P{b}_{(stabiel)}\end{array}$

Sien ook

• Valindaba, Suid-Afrikaanse aanleg waar uraan-235 vervaardig is.