ABSTRACT
A model based on electric circuit theory has been developed to simulate the radon concentration in an accumulator chamber from the soil surface. This model simulates the radon generation on earth as a voltage source, diffusion to the earth's surface as an electrical conductor, the convection flux of radon as an electrical current source and radon concentration in a chamber as a voltage across a capacitor. We use this model for processing the spike like an anomaly of radon. This paper offers a radon anomaly spike like has a duration time less than several hours. It is shown that the time constant of a general setup is very large with compare the duration time of a spike like anomaly. In this condition the actual shape of radon flux in earth is different from radon measuring concentration in the chamber. With regard to this model it is shown that the rise time of measured radon concentration must be equal the duration time of a spike like anomaly and the fall time must have a constant time equal the five times of constant time of our setup and it is independent of the shape of the anomaly.
