Study on Radon and Radon Progeny in Indoor Air

Radon progeny is the second cause of lung cancer after smoking. Radon progeny responsible More than 50% of total received dose in nature. The most important parameteres in radon progeny measurements is the activity size distribution (attached and unattached)in indoor, outdoor and workplaces. this parameter are using in dosimtric models to estimate the deposition fraction of these progeny through respiratory system then estemate the effective dose.