月球样本中的宇宙和原始放射性核酸通过非破坏性马射线光谱学
Science (New York, N.Y.)
|January 30, 1970
概括
这项研究测量了月球样本中的宇宙辐射核,发现由于太阳质子的不同度. 与的比率表明地球和月球材料的共同核合成.
科学领域:
- 宇宙化学 宇宙化学
- 核天体物理学 核天体物理学
- 月球科学 月球科学
背景情况:
- 宇宙源放射性核酸是由银河系和太阳系宇宙射线与外星物质相互作用而产生的.
- 了解月球样本中的放射性核酸度,可以了解太空气候变化和月球的地质历史.
- 之前的研究已经分析了月球规流体和岩石中的各种同位素,但直接比较精细岩石和岩石中的特定放射性核化物至关重要.
研究的目的:
- 在月球微粒和岩石样本中量化特定的宇宙放射性核酸度 (例如,白-7,-26,-232,-238).
- 将月球样本中的放射性核素度与石中发现的度进行比较,了解生产机制.
- 通过分析与的比率来研究地球化学分化和核合成.
主要方法:
- 测量各种放射性核化物,包括-7,-22,-26,-44,-46,-48,-51,-54,-56,-57,-40,-238和-232. 这些放射性核化物包括-7,-22,-26,-44,-46,-48,-51,-51,-54,-56,-57,-40,-238.
- 分析月球微粒和三个月球岩石的部分.
- 测量的放射性核素度与基于太阳质子流和石数据的预期值的比较.
主要成果:
- 月球样本中的宇宙放射性核酸度与石的度有很大差异,主要是由于太阳质子的主要产量.
- 与岩石相比,月球上的罚金表现出明显更高的低能反应产品度.
- 观察到极其恒定的与的比率 (约为3.8),表明地质化学差异最小.
结论:
- 观察到的放射性核素分布与太阳质子的产生和长表面暴露时间一致.
- 恒定的与的比率支持了月球和地球材料具有共同的核合成起源的假设.
- 这些发现有助于理解月球表面的过程和早期太阳系的化学进化.
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