机构地区: 成都理工大学核技术与自动化工程学院,成都610059
出 处: 《核电子学与探测技术》 2017年第2期207-210,共4页
摘 要: 为了从嫦娥系列绕月γ能谱测量实验获取月表γ能谱特征,应用CE1-GRS和CE2-GRSγ能谱2C级科学数据,首先从散射本底扣除后的谱线中提取出弱特征峰信息,然后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:(1)从CE1-GRSγ能谱能识别U、Th、K、Fe、Mg、Si、Al和O等8种月表可能元素,从CE2-GRSγ能谱能识别U、Th、K、Fe、Mg、Si、Al、O、Ti和Ca等10种月表可能元素;(2)卫星绕行轨道距月表距离越近、探测器的能量分辨率越高,得到的月球轨道γ能谱将更精细,从而能获取更准确的月表元素种类及其分布特征。 To acquire the features of the lunar gamma spectra detected by the Chang'e - 1 ( CE1 ) gamma ray spectrometer (GRS) and the Chang'e -2 (CE2) gamma ray spectrometer (GRS) respectively, weak peak sig- nals can be extracted in the scattering background subtracted spectra from the level 2C spectra data measured by the CE1 - GRS and CE2 - GRS. Then the lunar gamma spectra are made qualitative analysis, and the possible elements of the lunar surface are identified finally. The result shows that : ( 1 ) U, Th, K, Fe, Mg, Si, AI and O on the lunar surface can be qualitatively determined in the CE1 - GRS spectra; U, Th, K, Fe, Mg, Si, AI, O, Ti and Ca can be identified in the CE2 - GRS spectra ; (2) the distance between the lunar orbit of the GRS and lunar surface for CE2 -GRS is closer, the energy resolution of the detector is higher, the GRS can identify more element types and its distribution characteristics of the lunar surface.