Article Dans Une Revue Radiation Measurements Année : 2024

Studies on the retrospective thoron measurements by CDs/DVDs: A posteriori calibration and influence of environmental factors

Résumé

Past exposure to indoor thoron poses a significant risk for lung cancer. A method based on home-stored CDs/DVDs allows the estimation of past exposure through retrospective thoron measurements. However, these measurements are significantly affected by the geometry of the CD-case. In this paper, an improved a posteriori calibration procedure is proposed that mitigates the CD-case effect, enabling the estimation of the disk's calibration factor with uncertainty better than 20%. The influence of the environmental temperature, pressure and humidity on the thoron measurements is also studied. It is observed that these parameters have influence within 30%. Thus, retrospective thoron measurements with uncertainty better than 50% can be conducted. The CD method overcomes a major source of error in evaluating the past thoron exposure related to the yearly changes in indoor thoron that could even reach an order of magnitude.
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Dates et versions

cea-04799489 , version 1 (23-11-2024)

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Strahil Georgiev, Ivelina Dimitrova, D. Pressyanov, Benoit Sabot, Nathalie Michielsen, et al.. Studies on the retrospective thoron measurements by CDs/DVDs: A posteriori calibration and influence of environmental factors. Radiation Measurements, 2024, 175, pp.107147. ⟨10.1016/j.radmeas.2024.107147⟩. ⟨cea-04799489⟩
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