الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The thesis is composed of four chapters:
Chapter 1:
Is a theoretical background and literature review covering a historical review of radon, its progeny, sources, health hazards and some definitions and terminologies.
Chapter 2:
Includes theoretical background of techniques used in radon measurements (active and passive methods).
Chapter 3:
Includes the experimental set-up and testing the performance of radon calibration chamber.
Chapter 4:
It contains the results obtained in the present work. The calibration factor as well as the adjustment factor was determined as function of exposure time, water gain and temperature. The response of the detector to water adsorption at different temperature was deduced. The effect of the temperature on the radon adsorption rate was studied also. The MDL was calculated to determined the optimum exposure time for the 4″ open face charcoal canister at different temperature.
Radon concentration was measured in three schools. The results showed that the average radon concentration was lower than the alert level.