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Flexible Polyurethane - Tungsten oxide based composite for γ radiation shielding.

Prashant G Ghule¹, G T Bholane², Rahul Kumar²

¹Department of Physics, Savitribai Phule Pune University, Pune, 411007, Maharashtra, India; Research Center in Physics, Baburaoji Gholap College, Sangvi, Pune, 411027, Maharashtra, India.

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Summary

This study developed tungsten oxide (WO3) polymer composites for gamma radiation shielding. The 50 wt% WO3 composite demonstrated superior shielding properties compared to other materials, showing promise for radiation protection applications.

Keywords:

Gamma radiation shielding Geant4 simulation Phy-x /PSD Polymer composite Polyurethane Tungsten oxide

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Area of Science:

Materials Science
Nuclear Engineering
Polymer Science

Background:

Developing effective gamma radiation shielding materials is crucial for safety in various applications.
Polymer composites offer tunable properties for radiation attenuation.
Tungsten oxide (WO3) is a dense ceramic with potential for radiation shielding.

Purpose of the Study:

To develop and investigate tungsten oxide (WO3) polymer composites as advanced gamma radiation shielding materials.
To experimentally assess the radiation shielding performance of these composites across a range of gamma-ray energies.
To compare experimental results with simulations and theoretical data for validation.

Main Methods:

Fabrication of seven polymer composite samples with varying weight percentages (0-50 wt%) of WO3 using solvent casting.
Experimental evaluation of shielding properties (attenuation coefficients, HVL, MFP, RPE, Zeff, Ne) using gamma-ray spectroscopy with an HPGe detector (81-1408 keV).
Validation through Geant4 simulations and comparison with Phy-X/PSD theoretical data.

Main Results:

The composite with 50 wt% WO3 exhibited the highest mass attenuation coefficient (2.947 cm²/g) and linear attenuation coefficient (4.8 cm⁻¹).
Shielding performance was directly correlated with WO3 content.
The 50 wt% PU-WO3 composite showed superior shielding efficiency compared to polymer-based bismuth oxide composites at 81 keV.

Conclusions:

Tungsten oxide polymer composites are effective gamma radiation shielding materials.
Higher WO3 content significantly enhances shielding capabilities.
The developed 50 wt% WO3 composite presents a promising, efficient alternative for gamma radiation shielding applications.