Study on the variation of indoor gamma radiation in the Dhaka district.
Monthly indoor gamma dose rates in 15 houses in the Dhaka district were measured for a period of a year using lithium fluoride (LiF) thermoluminescence dosemeters (TLD-100). The indoor gamma dose rate was found to vary between residences and with the age of buildings. A statistical analysis between indoor gamma dose rate and meteorological parameters, namely, teperature, rain fall, relative hamidity and atmospheric pressure was performed. The correlation between the measured gamma dose rate and meteorological parameters indicates that meteorological parameters influence the indoor gamma dose rate. It is proposed, however, that the ventilation rates of the houses should be considered.
Idrish Miah
M
M
Department of Physics, Bangladesh Institute of Technology, Chittaong. bitcpe@globalctg.net
D016902:Air Pollution, Indoor / Q000032:analysis*; D000398:Air Pollution, Radioactive / Q000032:analysis*; D003252:Construction Materials; D005720:Gamma Rays / Q000009:adverse effects*; D006798:Housing; D006801:Humans; D008962:Models, Theoretical; D010539:Permeability; D011829:Radiation Dosage; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation* / Q000379:methods