title: A novel algorithm for quick and continuous tracing the change of radon concentration in environment.
abstract: Several measurements of the radon concentration are performed by RAD7 in the University of South China. We find that 30-40 min is needed for RAD7 for tracing the concentration of the standard radon chamber. There are two reasons. The first is that the sufficient time of air cycle is needed for the radon concentration in internal cell of RAD7 equal to that of the environment; and the second is that the sufficient decay time is needed for the (218)Po concentration in internal cell of RAD7 equal to that of the radon. We used a zeroth order approximation to describe the evolution of the environment radon concentration, and obtained a novel algorithm for quick and continuous tracing the change of radon concentration. The corrected radon concentration obtained through this method is in good agreement with the reference value. This method can be applied to develop and improve the instruments for tracing the change of radon concentration quickly.
authors.affiliation: Department of Physics and Electronics, Hengyang Normal University, Hengyang, Hunan 421008, China. hytyl@163.com
authors.forename: Yanliang
authors.initials: Y
authors.lastname: Tan
authors.forename: Detao
authors.initials: D
authors.lastname: Xiao