Question:
Samples of two radioactive nuclides A and B are taken. λA and λB are the disintegration constants of A and B respectively. In which of the following cases, the two samples can simultaneously have the same decay rate at any time?
(a) Initial rate of decay of A is twice the initial rate of decay of B and λA = λB
(b) Initial rate of decay of A is twice the initial rate of decay of B and λA > λB
(c) Initial rate of decay of B is twice the initial rate of decay of A and λA > λB
(d) Initial rate of decay of B is the same as the rate of decay of A at t = 2h and λB < λA
Solution:
(b) Initial rate of decay of A is twice the initial rate of decay of B and λA > λB
(d) Initial rate of decay of B is the same as the rate of decay of A at t = 2h and λB < λA