Chemical changes in terrestrial lunar simulants exposed to gamma radiation simulating lunar ionizing radiation environment

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Planetary and Space Science Pub Date : 2025-01-01 DOI:10.1016/j.pss.2024.106031

Nilanjan Mitra , Tyrel M. McQueen , Robert Volpe , Michael Daly , V. Desai , N.P. Armitage

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引用次数: 0

Abstract

Recent research has focused on using in-situ lunar materials for infrastructural construction to develop sustainable lunar infrastructure for human habitats. The development of any infrastructural material for construction typically involves some chemical reactions. For lunar infrastructural construction research, terrestrially derived lunar simulants (which match the chemical compositions and particle size of actual lunar samples from the Apollo and Luna missions) are typically utilized for these feasibility studies. However, there are differences between these lunar simulants and the actual lunar regolith, since the simulants are not subjected to ionizing radiations from galactic cosmic radiation (GCR) and solar energetic particles (SEP) prevalent on the moon. In this study, the simulant materials were subjected to gamma radiation to simulate similar ionizing conditions on Earth. It is demonstrated in this manuscript that gamma irradiation results in the formation of entrapped radicals, which significantly changes the chemical signatures of the terrestrially derived lunar simulants (characterized using Terahertz and Electron Paramagnetic resonance spectroscopy), raising questions and describing the need for further detailed material investigations for the terrestrial methodologies being developed for in-situ resource utilization (ISRU) for lunar construction.

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地球月球模拟物暴露于模拟月球电离辐射环境的伽马辐射中的化学变化

最近的研究主要集中在利用原位月球材料进行基础设施建设，为人类栖息地开发可持续的月球基础设施。任何用于建筑的基础材料的开发通常都涉及一些化学反应。对于月球基础设施建设研究，陆地上的月球模拟物（与阿波罗和月球任务中实际月球样本的化学成分和粒度相匹配）通常用于这些可行性研究。然而，这些月球模拟物与实际的月球风化层之间存在差异，因为模拟物不受来自银河系宇宙辐射（GCR）和月球上普遍存在的太阳高能粒子（SEP）的电离辐射的影响。在本研究中，模拟材料受到伽马辐射，以模拟地球上类似的电离条件。在这篇手稿中证明，伽马辐射导致了被困自由基的形成，这极大地改变了陆地衍生的月球模拟物的化学特征（使用太赫兹和电子顺磁共振波谱进行表征），提出了问题，并描述了为月球建设的原位资源利用（ISRU）正在开发的陆地方法进行进一步详细的材料调查的必要性。

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

Planetary and Space Science 地学天文-天文与天体物理

CiteScore

5.40

自引率

4.20%

发文量

126

审稿时长

15 weeks

期刊介绍： Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research