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1.问题的提出:由于X射线能谱化的分辨率(Mn—Ka线)一般不低于140eV,造成谱中某些分析线发生重叠。2.重叠峰线性剥离法。2.1特征线的峰形及线性剥离法的定义。能谱图中每一特征X射线峰的轮廓可用一相应的高斯函数曲线来描述,其表达式为X_i=Aexp[-1/2((E-E_i)/σ)~2] (1)E_i为多道分析器第i道所对应的能量,X_i为该道内的计数,E为高斯峰值所对应的能量,可称为特征能量,σ为统计偏差,A为振幅。峰剥离实际上是峰叠加的逆过程。假设一合峰是N个子峰叠加而成,该合峰的轮廓可以由下面表达式
1. Propose the Problem: Since the resolution of X-ray spectroscopy (Mn-Ka line) is generally not less than 140eV, some analysis lines in the spectrum overlap. 2. overlapping peak linear delamination method. 2.1 Characteristics of the peak shape and linear delamination method definition. The contour of each characteristic X-ray peak in the spectrum can be described by a corresponding Gaussian function curve, and its expression is X_i = Aexp [-1/2 (E-E_i) / σ) ~ 2] (1) E_i Is the energy corresponding to the i-th channel of the multi-channel analyzer, X_i is the count in the channel, E is the energy corresponding to the Gaussian peak, which can be called the characteristic energy, σ is the statistical deviation, and A is the amplitude. Peak delamination is actually the inverse of peak overlay. Assuming a composite peak is N superposition of sub-peaks, the combined peak contour can be expressed by the following formula