利用CE1-GRS数据分析月表钾元素分布特征

Global Distribution Analysis of Potassium on Lunar Surface Using CE1-GRS Data

为从嫦娥一号伽马射线谱仪(CE1-GRS)探测数据获取月表K元素的分布特征,利用CE1-GRS 2C级数据,通过CE1-GRS数据处理的相关技术方法研究,得到K计数全月分布图的初步结果。该分布图反映出K含量高的区域主要集中在月球正面的西部月海区及附近;而K含量次之的区域位于南极爱特肯盆地内。在月球背面,K含量普遍表现为低值特征。将CE1-GRS获取的K分布图与月球勘探者伽马射线谱仪(LP-GRS)数据的K全月分布图进行了比较分析,两者体现出的月表K分布主要特征基本一致。

In order to acquire the global distribution of potassium （K） on the lunar surface, the methods and data processing procedure of the Chang＇E-1 （CE1） gamma-ray spectrometer （GRS） were studied using the level 2C spectra data measured by the CE1- GRS, and the preliminary global count map of K was derived. K is primarily concentrated within and around the western-most maria on the nearside and a secondary abundance concentration is located in the South Pole-Aitken basin. On the farside, K generally shows the feature of low abundance. Compared with the global map of K measured by the Lunar Prospector （LP） GRS, the result shows that major features of the global K distribution appeared in CE1-GRS map are consistent with that from LP-GRS.