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Lunar potassium distribution: Results from Chang'E-1 gamma ray spectrometer
Zhu Meng-Hua1; Ma Tao2; Chang Jin2; Tang ZeSheng1; Ip Wing-Huen1; Xu AoAo1
2011-11-01
发表期刊SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN1674-7348
卷号54期号:11页码:2083-2090
摘要The global map of potassium is represented in this paper from Chang'E-1 (CE-1) Gamma-ray Spectrometer (CGRS) for its one-year mission. Assuming a linear relationship between net count rate and its abundance, the average potassium abundance of individual landing sites is used as ground-truth for the calibration to derive the global map of absolute concentration. Although CGRS spectra have a lower signal-to-noise ratio, the translated map still keeps relative variations. As calculated from Apollo, Lunar Prospector, and Kaguya, global potassium map from CGRS shows high concentrations on the lunar nearside and secondary concentrations located in the South Pole-Aitken (SPA) basin on the farside. The comparison with Lunar Prospector potassium map shows a good correlation, though abundances on the highlands of the farside are much lower than that of Lunar Prospector. Since the footprint of CGRS measurements is larger than the sampling radius of each landing site, the calibrated map shows a larger variation range of the scale than that of Lunar Prospector, which was derived using theoretical calculation; namely, the calibrated map has higher values in the areas with high concentration while having lower values for the areas with lower concentration. However, the derived potassium map is more consistent with the lunar sample data than that of Lunar Prospector.
文章类型Article
关键词Chang'e-1 Gamma-ray Spectrometer Potassium Distribution Empirical Calibration
WOS标题词Science & Technology ; Physical Sciences
学科领域Physics
DOI10.1007/s11433-011-4491-x
关键词[WOS]PROCELLARUM KREEP TERRANE ; RADIOACTIVE ELEMENTS ; THORIUM ABUNDANCES ; SURFACE ; PROSPECTOR ; CRUST ; MOON ; EVOLUTION ; FEO
收录类别SCI
语种英语
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000297362200024
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文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/2091
专题暗物质和空间天文实验室
作者单位1.Macau Univ Sci & Technol, Space Explorat Lab, Taipa, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
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Zhu Meng-Hua,Ma Tao,Chang Jin,et al. Lunar potassium distribution: Results from Chang'E-1 gamma ray spectrometer[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2011,54(11):2083-2090.
APA Zhu Meng-Hua,Ma Tao,Chang Jin,Tang ZeSheng,Ip Wing-Huen,&Xu AoAo.(2011).Lunar potassium distribution: Results from Chang'E-1 gamma ray spectrometer.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,54(11),2083-2090.
MLA Zhu Meng-Hua,et al."Lunar potassium distribution: Results from Chang'E-1 gamma ray spectrometer".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 54.11(2011):2083-2090.
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