Abstract: The paper stresses the importance of measuring radon decay daughters in radiation dose evaluations. The measurement methods including alpha spectrometry and gross alpha counting, are introduced and are used to measure the radon and its decay productions in a uranium mine then. The dose estimations and evaluations are performed based on the measurement data of radon and its daughters. It can be seen, though measurement data is limited, that the radiation doses from the radon decay productions should be paid due attention for the radon (particularly, its decay daughters) monitoring in uranium mines.

Key words: radon decay daughters, alpha potential energy, alpha spectrometry, uranium mine, dose estimation