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"Regolith-based lunar habitats: an engineering approach to radiation sh" by Yulia Akisheva, Yves Gourinat et al.

Sustainable human exploration of the Moon will largely rely on in-situ resource utilisation, such as using regolith in habitat construction. This paper investigates the relative effectiveness of a polymer-enriched regolith brick versus a multilayer configuration of bare regolith and successive polyethylene layers as a passive shielding solution, when irradiated with Galactic Cosmic Ray (GCR) protons. Radiation–matter interactions are simulated with RayXpert® software and the dose equivalent in the ICRU sphere behind a representative habitat wall is calculated. The secondary emission of neutrons and protons from the shielding solution is studied as well. This work provides a quantitative insight into how much polymer is required to achieve a significant improvement in terms of radiation protection when compared to a bare regolith wall. At least 30–50% of polyethylene by mass is required to be added to a regolith mix to achieve a significant advantage in radiation protection capabil ....

Galactic Cosmic Ray , Monte Carlo Simulations , Radiation Protection ,