Dose Build-up of High-energy 1H and 4He Ions in Standard, Innovative and In Situ Shielding Materials for Space Radiation: Measurements and Simulations.

IF 2.5 3区医学 Q2 BIOLOGY

Radiation research Pub Date : 2025-03-01 DOI:10.1667/RADE-24-00244.1

Francesca Luoni, Uli Weber, Alica Karin Lang, Moritz Westermayer, Felix Horst, Marcello Baricco, Luca Bocchini, Martina Giraudo, Giovanni Santin, Christoph Schuy, Marco Durante, Daria Boscolo

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引用次数: 0

Abstract

Galactic cosmic rays (GCR) are among the biggest hindrances to crewed space exploration. The ions contributing the most to fluence and absorbed dose in free space are 1H and 4He. In addition, their contribution to dose equivalent increases behind thick shields. In this work, the results of depth-dose measurements performed with high-energy 1H and 4He ions (2 GeV and 480 MeV 1H, and 430 MeV/u 4He) in structural (aluminum alloy), standard (PMMA and high-density polyethylene), innovative (lithium hydride) and in situ (Moon regolith simulant) shielding materials are presented. A strong dose build-up effect, due to target fragments and secondary protons, is observed in the first part of the Bragg curve for all the tested ion beams. The experimental results are compared to the Monte Carlo simulation tools most used for radiation protection in space, i.e., different physics lists of Geant4, PHITS, and FLUKA.

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高能1H和4He离子在标准、创新和原位空间辐射屏蔽材料中的剂量累积：测量和模拟。

银河宇宙射线（GCR）是载人太空探索的最大障碍之一。自由空间中对影响和吸收剂量贡献最大的离子是1H和4He。此外，在厚屏蔽后，它们对剂量当量的贡献增加。在这项工作中，介绍了在结构（铝合金）、标准（PMMA和高密度聚乙烯）、创新（氢化锂）和原位（模拟月球风化层）屏蔽材料中使用高能1H和4He离子（2 GeV和480 MeV 1H， 430 MeV/u 4He）进行深度剂量测量的结果。在所有被测离子束的布拉格曲线的第一部分观察到由于靶碎片和次级质子而产生的强剂量累积效应。实验结果与空间辐射防护最常用的蒙特卡罗模拟工具Geant4、PHITS和FLUKA的不同物理列表进行了对比。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation research 医学-核医学

CiteScore

5.10

自引率

8.80%

发文量

179

审稿时长

1 months

期刊介绍： Radiation Research publishes original articles dealing with radiation effects and related subjects in the areas of physics, chemistry, biology and medicine, including epidemiology and translational research. The term radiation is used in its broadest sense and includes specifically ionizing radiation and ultraviolet, visible and infrared light as well as microwaves, ultrasound and heat. Effects may be physical, chemical or biological. Related subjects include (but are not limited to) dosimetry methods and instrumentation, isotope techniques and studies with chemical agents contributing to the understanding of radiation effects.