Digital spectrum processing of the characteristic K-lines of the lanthanides

For the decomposition of complex multiplets, which consist of the fluorescent K-series of the lanthanides in the energy range from 30 keV to 60 keV, the procedure of digital filtering of the spectrum data was elaborated using the libraries of real-shape lines. This elaboration was applied to the software for energy-dispersive x-ray fluorescent spectrometers based on Si(Li) and HP Ge planar detectors. Taking into account the fact that the real shape of line is changed under different count rate, the procedure of spectrum processing has the following principle peculiarities: three levels of library of real-shape lines, i.e. the level of high content of fluorescent elements, middle and low contents; the regulation of parameters of digital filters; use of the nonlinear least squares technique; also the estimation of quality of this investigation is given. 6 refs., 2 figs