Photon shielding properties of TiO2 and WO2 incorporated into ordinary concrete: Evaluation for radiotherapy applications

Cecília Borges Moreto; Eduardo De Paiva

doi:10.15392/2319-0612.2025.2841

Authors

Cecília Borges Moreto Division of Medical Physics, Institute of Radiation Protection and Dosimetry
Eduardo De Paiva Division of Medical Physics, Institute of Radiation Protection and Dosimetry

DOI:

https://doi.org/10.15392/2319-0612.2025.2841

Keywords:

shielding materials, photon attenuation, WO2, TiO2

Abstract

This computational study evaluates the photon shielding properties of titanium dioxide (TiO₂) and tungsten dioxide (WO₂) when incorporated into ordinary concrete. The analysis utilizes the National Institute of Standards and Technology (NIST) XCOM database to calculate mass attenuation coefficients, tenth-value layers (TVL), mean-free paths (MFP), and radiation protection efficiency (RPE) over photon energies ranging from 1 to 10 MeV. Results demonstrate that concrete enhanced with TiO₂ and WO₂ shows a significant improvement in photon shielding efficiency compared to conventional concrete, particularly at higher photon energy. At 6 MeV, TVL for ordinary concrete is 46% higher than TVL for the sample in which 50% of the gravel was replaced by TiO₂ (by volume), and is 237% higher than the TVL for the sample when considering the incorporation of WO₂ in the same proportion. At 10 MeV, these differences change to 42% and 338%, respectively for the samples containing TiO₂ and WO₂. These findings highlight the superior shielding properties of the TiO₂ and WO₂ composites, suggesting that they have strong potential for applications in radiotherapy facility rooms and nuclear systems shielding. Experimental validation of these computational results is planned for future work to further confirm their practical applicability.

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References

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