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- W2103309078 abstract "Twin chamber solid state nuclear track detector based dosimeters are used for estimating radon (222Rn), thoron (220Rn) gases and their progeny concentrations in air. These dosimeters employ two numbers of LR-115 (type II) detectors inside each of the two chambers for gas concentration estimations and a third detector is placed externally for progeny measurements. The tracks formed on the detector are etched under specific conditions and counted by spark counting techniques. A theoretical model has been developed to characterize the response of these detectors to alpha particles of different energies incident at different angles on the detector surfaces. This involves the estimation of the total time required for track formation that incorporates both bulk etch rates and the track etch rates. Using this information, the region of influence for the given geometry of the dosimeter is determined. The detectable tracks from this region of influence, computed by the model, are used to obtain the calibration factors (CFs). Results yielded the CF for each of the species in the bare mode exposure as 0.02trcm−2perBqdm−3 while those for 222Rn and 220Rn in the cup dosimeters were estimated as 0.023 and 0.018trcm−2perBqdm−3, respectively. The CFs for the cup dosimeters were also determined experimentally in the laboratory by exposing the dosimeters to known concentrations of222Rn, 220Rn and their progeny concentrations. These compared fairly well with the theoretically compounded values. This methodology will be useful in designing cup dosimeters with better efficiencies." @default.
- W2103309078 created "2016-06-24" @default.
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- W2103309078 date "2004-02-01" @default.
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- W2103309078 title "Calibration factors for LR-115 (type-II) based radon thoron discriminating dosimeter" @default.
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- W2103309078 doi "https://doi.org/10.1016/j.radmeas.2003.09.003" @default.
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