RELIABILITY OF THE PARAMETERS IN THE RESOLUTION OF OVERLAPPED GAUSSIAN PEAKS

The reliability of the parameters obtained in the decomposition of two overlapped Gaussian peaks has been studied both as a function of the degree of overlapping between them and of the height and halfband widt h ratios. To do this a method based on the examination of the elements of dispersion matrix, obtained in a Gauss Newton non linear least squ ares procedure has been adopted. This is a potent tool for pointing ou t the functional dependence of the parameter errors on the set of nume rical values defining the model and on the choice of experimental cond itions. It has been shown that the ratio between halfband widths and t he degree of overlapping of the bands are the leading factors affectin g the reliability of results in this kind of curve decomposition.