嫦娥系列月球伽玛仪器谱的定性分析及比较
首发时间:2015-08-19
摘要:为获取嫦娥一号伽玛射线谱仪(CE1-GRS)和嫦娥二号伽玛射线谱仪(CE2-GRS)所探测到的月表元素种类,本文从散射本底扣除后的谱线中提取出弱特征峰信息,进而对嫦娥系列仪器谱进行定性分析,推定月表存在的可能元素种类。结果表明:CE1-GRS仪器谱中识别出U、Th、K、Fe、Mg、Si、Al和O八种月表可能元素。CE2-GRS仪器谱比CE1-GRS仪器谱多识别出两种可能元素Ti和Ca;对这两次绕月伽玛探测实验所获结果进行对比分析可知:卫星绕行轨道距月表距离越近、探测器的能量分辨率越高,伽玛射线谱仪识别出的月表可能元素的种类越多。
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Qualitative Analysis and Comparison of Chang'E-1 and Chang'E-2 Gamma-ray Spectra
Abstract:To obtain the element types of the lunar surface detected by the Chang'e-1(CE1) gamma ray spectrometer(GRS) and the Chang'e-2(CE2) gamma ray spectrometer(GRS) respectively, so weak peak signals can be extracted in the scattering background subtracted spectra. Then the lunar gamma spectra are made qualitative analysis, and the possible elements of the lunar surface are identified finally. The result shows that a number of possible elements such as U, Th, K, Fe, Mg, Si, Al and O on the lunar surface can be qualitatively determined in the CE1-GRS spectra; Compared with the CE1-GRS spectra, more possible elements Ti and Ca can be identified in the CE2-GRS spectra. Meanwhile, compared the results of the CE1-GRS experiment with that of the CE2-GRS experiment, we can draw a conclusion that the distance between the lunar orbit of the GRS and lunar surface is closer, the energy resolution of the detector is higher, the GRS can identify more element types of the lunar surface.
Keywords: Gamma-ray Spectra Chang-E satellite Qualitative analysis Detection of the moon
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