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Measurements of Soil Carbon by Neutron-Gamma Analysis in Static and Scanning Modes
Published on: August 24, 2017
RADON MIGRATION IN SOIL AND ITS RELATION TO TERRESTRIAL GAMMA RADIATION IN DIFFERENT LOCATIONS OF THE GREEK EARLY
A Clouvas1, F Leontaris1, S Xanthos2,3
1Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, GR-54124Thessaloniki, Greece.
Radon concentration in soil increases with depth. A diffusion-advection model accurately predicted radon exhalation rates, correlating positively with terrestrial gamma radiation levels.
Area of Science:
- Environmental Science
- Geophysics
- Radiological Protection
Background:
- Radon (Rn) is a naturally occurring radioactive gas.
- Understanding radon transport in soil is crucial for radiological protection.
- Radium distribution in soil is a key factor influencing radon concentration.
Purpose of the Study:
- To measure radon concentration as a function of soil depth.
- To determine radon exhalation rates from soil using both direct and indirect methods.
- To investigate the correlation between radon migration and terrestrial gamma radiation.
Main Methods:
- Soil sampling and radon concentration measurements at various depths (2011-2015).
- Solving the general transport equation (diffusion and advection) to model radon migration.
- Direct radon exhalation measurements (2010-2015).
- Correlation analysis between gamma radiation and radon exhalation rates.
Main Results:
- Radon concentration increased with soil depth, while radium distribution remained constant.
- The diffusion-advection model accurately reproduced the measured radon profile.
- Indirectly deduced radon exhalation rate (26.7 ± 4.5 Bq m⁻² h⁻¹) closely matched direct measurements (21.1 ± 3 Bq m⁻² h⁻¹).
- A positive correlation was found between gamma dose rate in air and radon exhalation rate.
Conclusions:
- The diffusion-advection model is a valid tool for predicting radon exhalation rates from soil.
- Radon migration in soil is positively correlated with terrestrial gamma radiation.
- Findings contribute to improved radon risk assessment and radiological monitoring.
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