What is meant by radioactive equilibrium? - Vidyadip

Question

What is meant by radioactive equilibrium?

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Answer

Radioactive Equilibrium : If the activity of a radioactive substance does not change with time during the disintegration process, then this state is called radioactive equilibrium. In this condition, the net rate of disintegration of all the elements except the first and last element of the radioactive process becomes zero at some time, i.e.
$\lambda_{A} N_{A}=\lambda_{B} N_{B}=\lambda_{C} N_{C} \ldots \ldots=\text { constant. }$
This constant is also called the activity of the radioactive sample.

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