For LR-115 twin cup 5.5x9cm we found, 0.020 for sponge mode, 0.021 for filter mode and 0.029 for bare mode. While, calibration factor for 11x7cm was 0.343 and the indoor calibration factor using cup technique 6x7cm was 0.1888 and 0.384 for bare mode.
The calibration factor of CR-39 used in cylindrical can 25x7cm was found to be 0.227. Different types of calibration data were achieved by using this design in unit Tr.cm-2/Bq.m-3.d. Radon calibration chamber was designed and build in the environmental pollution laboratory University of Basrah. the chamber radius should be as twice or thrice in size as the detector radius. Our calculations also show that, the best radius of detector is 1.5 cm for CR-39 and 1cm for LR-115(II) and the best radius of the dosimeters is 3.5 cm CR-39 and 3cm for LR-115(II) for any experimental work, i.e. Mathematical calculations were carried out to find etching critical angle, efficiency, calibration factor and probability detection for CR-39 and LR-115(II) detectors by three methods. The analytical approach was developed to estimate the values of range of alpha particles emitted from radon gas and progenies by using new version of SRIM2013. The fifth is the twin cup and open-closed solid state nuclear track detector dosimeters technique used for estimating radon and thoron gases in a selected area in Basrah Governorate (Zubair). The fourth is to measure the equilibrium factor for radon and thoron by using LR-115(II) detector. The third aim is determination of the activity concentrations of radon and naturally radionuclides occurring in gravels and sand quarries in south of Iraq (Basrah), clay and sludge oil of refinery. Secondly, is to design and fabricate a new radon chamber for radon the measurement of calibration factor and measure the effective diffusion coefficient of radon. The present work aims to achieve five main objectives: The first one is to calculate the calibration factors for SSNTDs and estimate the optimum diffusion chamber dimensions, theoretically by different mathematical methods.
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