Radioactive Decay Simulator
Select a mode above to explore nuclear decay
N(t) = N₀ · e^(−λt) | T½ = ln2/λ | A = λN
Mode:
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Nuclei:
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Time:
—
Activity:
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Decay Types
Half-Life
Decay Chain
Decay Type
α
β⁻
β⁺
γ
Example Isotope
Select a decay type and isotope.
☢ Trigger Decay
↺ Reset Nucleus
Initial atoms N₀
500
Half-life T½
10 s
Speed
¼×
½×
1×
4×
▶ Run
↺ Reset
Show theoretical curve
Show atom dots
Press ▶ Run to start simulation.
Decay Series
Uranium-238 → Lead-206
Uranium-235 → Lead-207
Thorium-232 → Lead-208
Radium-226 → Lead-206 (partial)
▶ Auto
⏭ Step
↺
Step delay (s)
1.5
