Graphene-based nanocomposites as gamma- and X-ray radiation shield

Area of Science:

• Materials Science
• Nuclear Engineering
• Physics

Background:

• Traditional radiation shielding relies on dense, heavy materials like lead, steel, and tungsten.
• The weight of conventional shielding materials limits their use in weight-sensitive applications such as avionics and space technology.

Purpose of the Study:

• To investigate the radiation shielding properties of a novel, low-density graphene-based composite.
• To evaluate the potential of this lightweight material as an alternative to heavy shielding solutions.

Main Methods:

• Experimental measurement of linear attenuation coefficients for gamma and X-ray radiation.
• Validation of experimental data using the XCOM (X-ray Cross Section Database) model.
• Comparison of mass attenuation coefficients with established shielding materials.

Main Results:

• The linear attenuation coefficient was found to be dependent on radiation energy.
• Experimental results showed good agreement with predictions from the XCOM model.
• The graphene-based composite exhibited mass attenuation coefficients comparable to, and in some cases exceeding, those of conventional materials (e.g., >0.2 cm²/g at higher energies).

Conclusions:

• Graphene-based composites present a promising lightweight alternative for ionizing radiation shielding.
• The study validates the utility of the XCOM model for predicting shielding performance of new materials.
• This material demonstrates significant potential for shielding applications where reduced weight is a key requirement.