Uranium series

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Uranium-238
(α, 4.468 × 109 a)
Thorium-234
, 24.10 d)
Protactinium-234m
(1.16 min)
β, 99.84% IT, 0.16%
Protactinium-234
, 6.70 h)
Uranium-234
(α, 2.455 × 105 a)
Thorium-230
(α, 7.538 × 104 a)
Radium-226
(α, 1602 a)
Radon-222
(α, 3.8235 d)
Polonium-218
(α, 3.10 min)
α, 99.98% β, 0.02%
Lead-214
, 26.8 min)
Astatine-218
(1.5 s)
α, 99.90% β, 0.10%
Bismuth-214
(19.9 min)
Radon-218
(α, 35 ms)
α, 0.02% β, 99.98%
Thallium-210
, 1.30 min)
Polonium-214
(α, 0.1643 ms)
Lead-210
, 22.3 a)
Bismuth-210
(5.013 d)
β, 99.99987% α, 0.00013%
Polonium-210
(α, 138.376 d)
Thallium-206
, 4.199 min)
Lead-206
(STABLE)

The uranium series, also known as the radium series, is a decay chain starting with the naturally-occuring uranium-238 and ending in the stable lead-206.

References

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