Gaussian function
Gaussian function
"Gaussian function" is a function given by a exp { - (x - b)2 / c2}, where a, b and c are constants. It is used for pre-processing of the background in a spectrum and for fitting of the spectral intensity. Compared with the "Lorentzian function," the Gaussian function damps a little quickly in its tail. Real spectral shapes are better fitted with the Lorentzian function. However, the Gaussian function is conveniently used because it is manipulated mathematically easier than the Lorentzian function.
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