Nuclear Decay Chains
Interactive decay chain explorer — half-lives, secular equilibrium, and activity curves
Decay Chain
Chain:
Uranium-238 (4n+2)
Thorium-232 (4n)
Uranium-235 (4n+3)
Radium-226 branch
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Click a nuclide to see details.
α decay
β⁻ decay
β⁺/EC
stable
Activity vs Time
Time span:
10³ y
Animate
Secular equilibrium: dN/dt=0 when λᵢNᵢ=λ₁N₁ for all i (long-lived parent)