贺怀宇表示，这项成果不仅阐明了太阳风如何塑造月球外逸层和挥发分的分布，更提示利用月球样 品重建太阳风历史时，需先校正这些分馏效应，才能更准确追溯太阳演化轨迹。研究为理解无大气天体 与太阳风的相互作用提供了新框架，也为探索行星挥发物起源打开新视角。 （原载于《科技日报》 2025-12-03 01版） 在这项研究中，科研人员从嫦娥五号月壤中精选出36颗高纯度斜长石颗粒进行了深入分析。他们发 现，嫦娥五号月壤样品保存的太阳风信号比阿波罗月壤样品更接近原始状态，但仍与初始太阳风成分有 差异。进一步研究显示，这种差异主要发生在太阳风注入月表的瞬间，由注入过程中的动力学质量分馏 导致，而非后期改造。 基于此，科研人员提出了一个三阶段模型来解释月球表面稀有气体的行为——太阳风及宇宙射线注 入、局部热扩散以及再次被辐照。该模型表明，太阳风注入与气体逃逸是相互关联的过程：一部分轻元 素在撞击时可能因矿物微损伤而瞬间释放，进入月球外逸层；微陨石撞击和昼夜温差则会进一步促使气 体扩散逃逸，造成不同颗粒间气体含量的显著差异。 太阳风如何在月球上"留痕"？嫦娥五号月壤给出关键答案。记者2日从中国科学院地质与地球物理 研究所获悉，来自 ...

Core Insights - The research conducted on lunar soil samples from the Chang'e 5 mission reveals key mechanisms of solar wind interaction with the lunar surface, providing new insights into the distribution of volatile elements on the Moon and the evolution of the Sun [1][2] Group 1: Research Findings - Scientists analyzed 36 high-purity plagioclase particles from Chang'e 5 lunar soil, finding that the solar wind signals preserved in these samples are closer to their original state compared to Apollo lunar samples, although differences still exist [2] - The differences in solar wind composition are primarily attributed to the dynamics of the injection process rather than later modifications to the lunar surface [2] Group 2: Proposed Model - A three-stage model was proposed to explain the behavior of rare gases on the lunar surface, which includes solar wind and cosmic ray injection, local thermal diffusion, and re-irradiation [2] - The model indicates that the processes of solar wind injection and gas escape are interconnected, with some light elements being released instantly due to mineral micro-damage during impacts, and further gas escape facilitated by micrometeorite impacts and temperature variations [2] Group 3: Implications - The findings clarify how solar wind shapes the lunar exosphere and the distribution of volatiles, suggesting that corrections for fractionation effects are necessary when reconstructing solar wind history to accurately trace solar evolution [2] - This research provides a new framework for understanding the interaction between airless celestial bodies and solar wind, opening new perspectives for exploring the origins of planetary volatiles [2]