Abstract
In this work, we have measured the concentration of radon gas in eight cement samples from different
origins by using long-term measurement of radon decay products with solid state track detectors which
alpha particles that emitted from radon gas was detected using (LR115II) nuclear track detector.
The obtained results show that, the highest average radon gas concentration in cement samples was
found in Iraq cement (Samawa) sample, which was (10.625 Bq/m
3
) ,while the lowest one was found in
(Saudi) sample, and found to be (2.486Bq/m
3
). The present results show that the radon gas
concentration in all cement samples is not below the allowed limit from (ICRP) agency.