عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The measurements of radon as a radioactive gas, when inhaled creates lung cancer risk in human, are of great importance for researchers. In this research, the response of a passive radon detector is determined based upon a new calibration method. The detector includes a chamber in which the radon gas can diffuse inside the cham ber and the alpha particles from the radon and/or its alpha emitter daughters are registered on the surface of a polycarbonate film at the bottom of the chamber. The new calibration method includes a traceable standard flow-through source of radon, connected to a designed calibration chamber with adjustable inner radon concentration. The uncertainty of the method is 5% with the confidence level of 95%. The sensitivity of the detection method is calculated to be 13.55
[tracks cm-2 (Bq lit-1 day)-1], and the results of an international intercomparison show that the differences between the measured values by the system are less than 5% in comparison with those of the reference values in three radon levels; that is, low, medium, and high concentrations.