Secular Equilibrium ·
Parent & Daughter
un
seel
.com · ²²⁶Ra → ²²²Rn · activities equalize
Parent A₁
100%
Daughter A₂
0%
Phase
growth
showing
—
Parent ²²⁶Ra (slow, T½ 1600 y)
Daughter ²²²Rn (fast, T½ 3.82 d)
Decay quanta (activity)
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Un
seel
.com · Secular Equilibrium