The paper will present a method based on the accumulation chamber technique for measuring of radon exhalation from the medium surface. A radon monitor traces the change of radon concentration in the accumulation chamber, and then the radon exhalation can be obtained accurately through linear fit. Based on our recent experiments, the radon exhalation rate from the medium surface obtained from this method is in good agreement with the actual exhalation rate of our simulation facility. This method is superior to the competition method which obtains the radon exhalation through the exponential fit by an external PC-system. The calculation for the exponential fit is very easy by computer and related software. However, for portable instruments, the single chip microcomputer can’t calculate the exponential fit rapidly. Thus, this method is usable for developing the new portable instrument to classify building materials, etc.
Radon exhalation rate Accumulation chamber Tracing the change of radon concentration Linear fit
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Project supported by the National Natural Science Foundation of China (Grant No. 11075049), the Excellent Talents Program of Hengyang Normal University of China, the construct program of the key in Hunan province and the Science Foundation of Hengyang Normal University of China. The authors appreciate Mr. Chris Young and Mrs Stephany Moser for providing the language editing service.
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