Radon measurement in α energy spectrum and its influence factors

Background: Radon is one radioactive gas which should be monitored. Purpose: High sensitivity, good stability for distinguishing the characteristics of radon and thorium in air radon content measurement are required. Methods: One alpha energy spectrum measuring device was designed based on diffusion-accumulation theory. And the major influence factors were discussed. At the same time, the preliminary solution was proposed and testing was progressed. Results: We have got the results of energy calibration curve, energy resolution, sensitivity and other important information by standard radon chamber calibration. Conclusions: The experimental results show that this scheme is feasible and the performance is suited to the national standards for air radon measurement requirements. (authors)