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Radon exhalation rate and emanation factor values in relation to different soil characteristics
Anita Csordás1, Máté Novák1, Gergely Tóth1
1Department of Radiochemistry and Radioecology, University of Pannonia, Veszprém, Hungary.
This study examined radium-226 (Ra-226) activity, radon exhalation, and soil properties in Hungary. Results showed typical background radiation levels, with a weak correlation between Ra-226 and radon exhalation but none with soil emanation factors.
Area of Science:
- Environmental Science
- Radiological Protection
- Geochemistry
Background:
- Natural background radiation poses risks through cosmic and terrestrial sources.
- Terrestrial radiation originates from radioactive isotopes in soil, including uranium-238, uranium-235, thorium-232, and potassium-40.
- Soil properties influence radionuclide distribution and potential human exposure.
Purpose of the Study:
- To investigate the impact of soil types on radium-226 (Ra-226) activity concentration.
- To determine the relationship between soil properties and massic radon exhalation rate.
- To assess the influence of soil characteristics on the emanation factor for radon.
Main Methods:
- Soil samples collected from the Transdanubia region, Hungary, using a JRC grid network.
- Gamma spectrometry used to measure Ra-226 activity concentration.
- Massic radon exhalation rate and emanation factor determined for soil samples.
Main Results:
- Average Ra-226 activity concentration: 29.3 Bq/kg.
- Average massic radon exhalation rate: 29.04 mBq/kgh.
- Average emanation factor: 0.25.
- Observed weak correlation between Ra-226 concentration and massic radon exhalation rate.
- No correlation found between Ra-226 concentration and emanation factor.
Conclusions:
- Measured radiation levels are comparable to global averages, indicating no extreme findings.
- Soil type has a limited influence on Ra-226 activity concentration and radon exhalation.
- Further research may be needed to fully understand the complex interactions between soil properties and radionuclide behavior.
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