Project title: Radon Dosimetry

Inhaled radon (222Rn) progeny are the most important source of irradiation of the human respiratory tract. Epidemiological studies of underground miners of uranium and other minerals have provided reasonably firm estimates of the risk of lung cancer associated with exposure to radon progeny. It is well established that the absorbed radon dose in the lung is mainly due to radon progeny, but not the radon gas itself. Therefore, long-term measurements of the concentrations of radon progeny or the equilibrium factor F, the size distribution of radon progeny and the unattached fraction fp of the potential alpha energy concentration are needed to accurately assess the health-hazard contribution from radon progeny. Methods for long-term monitoring of the 222Rn gas itself are well established, such as through the use of solid-state nuclear track detectors (SSNTDs). We will further design methods for long-term monitoring of the F or fp. 


Yu, K.N., Nikezic, D., Ng, F.M.F., Leung, J.K.C., 2005. Long-term Measurements of Radon Progeny Concentrations with Solid State Nuclear Track Detectors. Radiation Measurements, 40, 560-568.

Yu, K.N., Nikezic, D., 2012. Long-term measurements of unattached radon progeny concentrations using solid-state nuclear track detectors. Applied Radiation and Isotopes, 70, 11041106.

Supervisor : Prof Peter K N Yu (

Suitable for: M.Phil. or Ph.D.

A good degree in applied physics or nuclear science