Long-term determination of airborne radon progeny concentrations using LR 115 detectors and the effects of thoron

PROGENY CONCENTRATIONS USING LR 115 DETECTORS AND THE EFFECTS OF THORON V. W. Y. Choi 1, C. K. M. Ng 1, R. K. K. Lam 1, M. Janik 2, A. Sorimachi 2, C Kranrod 2, D. Nikezic 1,3, S. Tokonami 2 and K. N. Yu 1,* Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong Environmental Radiation Effects Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba-shi 263-8555, Japan Faculty of Science, University of Kragujevac, Kragujevac, Serbia