1. Introduction
The soil and water have different radon concentrations due to
which its exposure to inhabitants varies substantially from
place to place (UNSCEAR, 1988). Two of the 222Rn descendent,
214Po and 218Po, are a emitters, and they contribute over 90% to
the total radiation dose received due to radon exposure
(Gruber, Maringer, & Landstetter, 2009).
The health hazard associated with radon arises from the
inhalation and ingestion of short lived decay products of
radon. When the radon gas is inhaled in to the lungs, most of it
is pumped out and does not build up in the respiratory system.
However small fraction of the radon that reaches the interior
region of the lungs can damage the DNA in sensitive lung
tissue and cause cancer. Moreover radon decay products that
are suspended in air are inhaled during breathing in our respiratory
system. Due to the short half life period of radon
decay products, they decay almost completely in the lungs.
During these decays alpha particle is emitted which can
transfer large amount of energy to vulnerable cells in lungs,
thereby leading to many health hazards.