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1 August 2022 Dose Attenuation in Innovative Shielding Materials for Radiation Protection in Space: Measurements and Simulations
Francesca Luoni, Daria Boscolo, Gianluca Fiore, Luca Bocchini, Felix Horst, Claire-Anne Reidel, Christoph Schuy, Claudio Cipriani, Andrea Binello, Marcello Baricco, Martina Giraudo, Giovanni Santin, Marco Durante, Uli Weber
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Abstract

Galactic cosmic rays (GCR) are among the main deterrents to manned space exploration. Currently, the most realistic way to reduce the dangers caused by GCR to acceptable levels is passive shielding. Light materials guarantee the strongest dose attenuation per unit mass. High-density polyethylene is considered the gold standard for radiation protection in space. Nevertheless, accelerator-based experimental campaigns already showed the advantages of more hydrogen-rich innovative shielding materials such as lithium hydride. The experimental campaigns of this work focused on the absorbed dose attenuation properties of lithium-based hydrides chemically stabilized with a paraffin matrix. Such materials were compared to pure lithium-based hydrides, polyethylene, structural materials such as spacecraft aluminum alloys and lithium batteries, and in situ shielding materials such as Moon regolith and its main components silicon and silicon dioxide. The experimental results were compared to simulations performed with PHITS, FLUKA, and Geant4, which are among the most used Monte Carlo codes for radiation protection in space. The simulations showed systematic differences and highlighted the pressing need for reliable nuclear cross-section models.

©2022 by Radiation Research Society. All rights of reproduction in any form reserved.
Francesca Luoni, Daria Boscolo, Gianluca Fiore, Luca Bocchini, Felix Horst, Claire-Anne Reidel, Christoph Schuy, Claudio Cipriani, Andrea Binello, Marcello Baricco, Martina Giraudo, Giovanni Santin, Marco Durante, and Uli Weber "Dose Attenuation in Innovative Shielding Materials for Radiation Protection in Space: Measurements and Simulations," Radiation Research 198(2), 107-119, (1 August 2022). https://doi.org/10.1667/RADE-22-00147.1
Received: 4 March 2022; Accepted: 13 April 2022; Published: 1 August 2022
JOURNAL ARTICLE
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