Developing of passive detector for detecting natural radioactive gasses

Abstract

Radon is a natural radioactive gas that may cause health hazards for human health. The effect of different environmental conditions (temperature and humidity) on the performance of 4″ open face charcoal canister passive system used for measuring the radon concentration have been studied. The radon concentration has been corrected for chamber leakage. The calibration curves at different temperature 20, 25, 30 and 35 C has been constructed and adjusted at humidity 20, 50 and 80% for exposure time from 1 to 6 days. The radon concentration has been measured using 4″ open face charcoal canister (making use of suitably calibration curves) in three schools at different locations in Cairo city. Radon concentration has been measured at different floors and different environmental condition.