太阳风质子作为中性氢原子在空间风化层的极高反射
Extremely high reflection of solar wind protons as neutral hydrogen atoms from regolith in space
摘要：
我们报告测量极高的反射率太阳风粒子从风化覆盖的月球表面。在绕月轨道上的印度月船1号航天器上的亚千电子伏原子反射分析仪（SARA）仪器的测量表明，多达20%的撞击太阳风质子从月球表面反射回空间，成为中性氢原子。这一发现，一般适用于风化层覆盖的无大气层的机构，推翻了广泛接受的假设，风化层几乎完全吸收撞击太阳风。
英文摘要：
We report on measurements of extremely high reflection rates of solar wind particles from regolith-covered lunar surfaces. Measurements by the Sub-keV Atom Reflecting Analyzer (SARA) instrument on the Indian Chandrayaan-1 spacecraft in orbit around the Moon show that up to 20% of the impinging solar wind protons are reflected from the lunar surface back to space as neutral hydrogen atoms. This finding, generally applicable to regolith-covered atmosphereless bodies, invalidates the widely accepted assumption that regolith almost completely absorbs the impinging solar wind.
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