An isotope may be subject to more than one decay process
characterized by different decay rates. This section will examine a case
in which two decay processes are possible.

Section 4 Exercises:

Is the number of nuclei a constant? If so, what is it?

The decay of the parent is exponential. What is the decay rate
of the parent?

What are the decay rates associated with Processes 1 & 2? (Hint:
Refer to Section 1, Exercise 3.)

Does the sum of the decay rates for the two processes equal the decay rate
of the parent?

For times greater than several half-lives of these processes, the values
of N_{2} and N_{3} are constants. Write an expression
for N_{2} and N_{3} in terms of N_{1} and the
appropriate decay rate.