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! Halfleeftyd
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|↓ Uraan-238 (<{{sub sup>|238</sup><sub>|92</sub>|pos=right}}U) || α (Eerste α partikel)|| 4.47 miljard jare
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|↓ Torium-234 (<{{sub sup>|234</sup><sub>|90</sub>|pos=right}}Th) || β (Eerste β) || 24 dae
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|↓ Protaktinium-234 (<{{sub sup>|234</sup><sub>|91</sub>|pos=right}}Pa)||β (Tweede β)|| 6.7 ure
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|↓ Uraan-234 (<{{sub sup>|234</sup><sub>|92</sub>|pos=right}}U)||α (Tweede α)|| 240 000 jare
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|↓ Torium-230 (<{{sub sup>|230</sup><sub>|90</sub>|pos=right}}Th)||α (Derde α)|| 77 000 jare
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|↓ Radium-226 (<{{sub sup>|226</sup><sub>|88</sub>|pos=right}}Ra)||α (Vierde α)||1 602 jare
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|↓ Radon-222 (<{{sub sup>|222</sup><sub>|86</sub>|pos=right}}Rn)|| α (Vyfde α)||3.8 dae
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|↓ Polonium-218 (<{{sub sup>|218</sup><sub>|84</sub>|pos=right}}Po)||α (Sesde α)||3.1 minute
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|↓ Lood-214 (<{{sub sup>|214</sup><sub>|82</sub>|pos=right}}Pb)||β (Derde β)||27 minute
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|↓ Bismut-214 (<{{sub sup>|214</sup><sub>|83</sub>|pos=right}}Bi)||β (Vierde β)||20 minute
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|↓ Polonium-214 (<{{sub sup>|214</sup><sub>|84</sub>|pos=right}}Po)||α (Sewende α)||0.000164 sek
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|↓ Lood-210 (<{{sub sup>|210</sup><sub>|82</sub>|pos=right}}Pb)||β (Vyfde β)||22 jare
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|↓ Bismut-210 (<{{sub sup>|210</sup><sub>|83</sub>|pos=right}}Bi)||β (Sesde β)||5 dae
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|↓Polonium-210 (<{{sub sup>|210</sup><sub>|84</sub>|pos=right}}Po)||α (Agtste α)||138 dae
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| →Lood-206 (<{{sub sup>|206</sup><sub>|82</sub>|pos=right}}Pb)|| - ||Stabiel
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