https://pubs.acs.org/doi/10.1021/jacs.1c13604Instrumental Neutron Activation Analysis of Chang’E-5 Lunar Regolith Samples
Yonggang Yao, Caijin Xiao, Pingsheng Wang, Chunlai Li, and Qin Zhou
Publication Date:March 17, 2022
https://doi.org/10.1021/jacs.1c13604
(C) 2022 American Chemical Society
Abstract
The Chang’E-5 (CE-5) lunar samples were analyzed nondestructively for more than 40 elements by instrumental neutron activation analysis (INAA) with a strict quality assurance and quality control. Based on the INAA results, some new observations and discoveries were made. Major, minor, and trace elements in CE-5 are very different from those of the Earth and Apollo lunar samples. The rare earth element (REE) pattern indicated that the CE-5 lunar samples are mare basalts with a clear negative anomaly in Eu. Element correlations are a very interesting discovery; for example, the ratios of Ba/La and FeO/MnO in CE-5 are almost identical to those of the Apollo lunar samples. These observations and discoveries will enrich the understanding of the formation and evolution of the Moon.
嫦娥五号（CE-5）月球样品通过仪器中子活化分析（INAA）进行了40多种元素的无损分析，并有严格的质量保证和质量控制。基于INAA的结果，我们进行了一些新的观察和发现。CE-5中的主要、次要和微量元素与地球和阿波罗月球样品中的元素有很大不同。稀土元素（REE）模式表明，CE-5月球样品为泥灰玄武岩，在Eu中有明显的负异常。元素关联是一个非常有趣的发现；例如，CE-5中Ba/La和FeO/MnO的比率几乎与阿波罗月球样本的比率相同。这些观测和发现将丰富对月球形成和演化的理解。
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