https://doi.org/10.1140/epjs/s11734-026-02279-x
Regular Article
Assessment of the sampling place for the outdoor radon survey
National Centre for Radiobiology and Radiation Protection, “St. Georgi Sofiiski” Str. 3, Sofia, Bulgaria
a
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Received:
13
August
2025
Accepted:
14
March
2026
Published online:
29
March
2026
Abstract
The purpose of the study is to evaluate the influence of the sampling location on the results of outdoor radon concentration for background survey under the national project, КП-06-H87/3, funded by the Scientific Research Fund, based on measurements at different heights and distances from the building. The choice of measurement location is important for the representativeness and analysis of the survey results. However, compliance with the conditions cannot be guaranteed when many measurements are carried out in a lot of places at the same time. The research allowed for the evaluation of the correction factor for achieving the requirements of the ISO standard for the sampling place. For the experiment, continuous radon measurements were made using the TERA radon detection system (Tesla, Czech Republic), which includes portable probes—TSR4. A TSR4 portable probe features a measuring chamber with a semiconductor photodetector. The probe records radon concentration values along with humidity and temperature data, storing them in its internal memory, typically at hourly intervals. The results established a relationship between outdoor radon concentration and the height at which the measurements were taken. The vertical attenuation coefficient of radon was evaluated to be 0.067 for light wind, temperature 10–24 °C, and relative humidity 10–90%. The influence of the building on the radon concentration was confirmed. These results will be used to develop a methodology for the integral assessment of the radiation background from the Earth’s surface for the implementation of the project.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
