Transient Equilibrium Calculator

In nuclear physics, transient equilibrium is a situation in which equilibrium is reached by a parent-daughter radioactive isotope pair where the half-life of the daughter is shorter than the half-life of the parent. It occurs after four half-lives, on average. Use this online transient equilibrium calculator to calculate for the parent daughter activity.

The activity of the daughter in transient equilibrium is given by the Bateman equation. Here, the daughter activity increases and eventually reaches a maximum value that can exceed the parent activity.