Simulation Research of Interval Analysis Method for Measuring ²²⁰Rn

The kind of multiple time analysis method was used to measure and track the basic principle of radon activity and the corresponding calculation formula. According to random nuclear signal in time a poison distribution, it produces the data of decay pulse serials of radon and its daughters by using matlab and using time interval method analyzed. the results show that the time interval analysis method was effectiveness for measuring the low activity radon events in the high background.