Modification to the Effect of Water Vapor on Rn in Two filter Method
Han Guosheng Li Xiaoge Wang Qingheng (China Institute for Radiation Protection,Taiyuan,030006)
The effect of water vapor is important in two filter method when relative humidity is less than 20%. According to neutralization mechanism of Radon progeny RaA.The function between water vapor and RaA diffusion coefficient is deduced.Thus the method does not vary with relative humidity. The relative error of the results by modification is no more than 3%.