Dosimetry of indoor alpha flux belonging to seasonal radon, thoron and their EECs.

Radon (Rn) and thoron (Rn) are ubiquitous radioactive noble gases present in the earth's crust. The source term for these gases includes soil and building materials as well. The radiological impact of radon/thoron gases and their decay products on human life is a matter of concern and has been given due attention in research and policy.