5. Consider the decay chain given by:
A?B?C (stable)
where $\lambda_A << \lambda_B$.
a) Plot the relative activity of the parent (A) and daughter nuclide (B), clearly labeling the
region where equilibrium is reached, and noting the type of equilibrium.
b) Now consider the case where $\lambda_A < \lambda_B$, but not negligibly less. Sketch the relative activity
of the parent (A) and daughter nuclide (B), clearly labeling the region where equilibrium
is reached, and noting the type of equilibrium.
c) State the condition under which equilibrium cannot be reached for this decay change. Be
explicit in your discussion of the relationship between $\lambda_A$ and $\lambda_B$.
