Early pioneering studies of Apollo lunar soils revealed a geochemical dichotomy reflecting a dominance of mare and highland lithologies, with variable additions of Procellarum KREEP Terrane material. Here, we use the moderately volatile element cadmium to identify the sources and processes responsible for mass-dependent Cd stable isotope variations in the lunar regolith. In addition, capture of thermal neutrons by 113Cd, resulting from galactic cosmic rays (GCR) impacting the lunar surface, provides a means of reconstructing the exposure history of the regolith.

中文翻译：

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月球样品中的镉同位素分馏和中子俘获效应


对阿波罗月球土壤的早期开创性研究揭示了地球化学二分法，反映了母马和高地岩性的优势，Procellarum KREEP Terrane 材料的添加量各不相同。在这里，我们使用中等挥发性元素镉来确定导致月球风化层中质量依赖性 Cd 稳定同位素变化的来源和过程。此外，银河宇宙射线 （GCR） 撞击月球表面产生的 113Cd 捕获热中子，提供了一种重建风化层暴露历史的方法。