Metrology of the activity concentration of radon and its progenies at the German radon reference chamber

摘要

The German radon reference chamber at the PTB is a research and calibration facility for the development of new accurate techniques for measuring the activity concentration of radon and its short-lived progenies. Systematic studies of the correlation of the activity concentration of radon and its progenies with the environmental parameters (temperature, humidity, pressure and aerosol size distribution) are performed, resulting in the better understanding of the equilibrium factor F and the unattached fraction f_p. This work describes some methods used at the German radon reference chamber and the results obtained with regard to uncertainties and traceability.