Abstract
The calibration factor and diffusion are essential parameters in the solid state nucleartrack detectors dosimeters. In the present work, experiments were carried out to measurethe calibration factors for different modes of measurement in indoor radon dosimetry anddiffusion coefficient of gas filter used in the experiments. The calibration chamberprovides with standard radium source and radon vision instrument, was used as hybridcombination between active and passive methods. The calibration factor was determinedthrough the relation between standard radon concentration, track density and exposuretime. The values of calibration factors was 0.020±0.005 Tr.cm -2 /Bq.m -3 .d for sponge cupmode, 0.021±0.006 Tr.cm -2 / Bq.m -3 .d for filter cup mode and 0.029±0.008 Tr.cm -2 / Bq.m -3 .d for bare mode respectively. The calibration factor for bare CR-39 was found to be0.384±0.102 Tr.cm -2 / Bq.m -3 .d. The diffusion coefficients are 7.1x10 -13 m 2 /sec for filterpaper and 4.6x10 -9 m 2 /sec for sponge. The calibration of SSNTDs using hybrid methodbetween active and passive can be used to minimize the uncertainty in the calibrationfactors.
Published Version
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