Abstract
Cosmic-ray muon-induced radioactive isotopes are common backgrounds to various rare-event experiments, such as neutrino oscillation experiments, double beta-decay experiments and dark matter searches. Understanding the properties of such isotopes is particularly important for future experiments with higher sensitivities than the current generation. We study the relative production rate of the cosmogenic isotopes in the Daya Bay Reactor Neutrino Experiment. The production rates were measured by fitting the decay time and the beta energy spectrum of the isotopes respectively. The recent progress will be shown in the seminar.