USING COMB-LIKE INSTRUMENTAL FUNCTIONS IN HIGH-RESOLUTION SPECTROSCOPY

A new method is presented for the analysis of spectra from spectromete rs with a complicated instrumental function such as a comb-like one wh ich may be represented as a sum of several narrow peaks shifted relati ve to one another. The method is based on the solution of the convolut ion integral equation using the signal restoration procedures employed in the software package RECOVERY. It is implemented for the case of a spectrometer consisting of a scanning Fabry-Perot interferometer and a grating monochromator having equal rates of scanning. The efficiency of the procedure is demonstrated by applying it to the photoluminesce nce (PL) spectra of excitons bound to the isoelectronic hydrogen-relat ed centres in silicon grown in a hydrogen atmosphere. It is shown that the spectral density of the analysed radiation is resolved successful ly and that the spectrometer has effectively a greater working range a nd signal-to-noise ratio in comparison with the standard Fabry-Perot i nterferometer. The procedure can be used in any kind of high-resolutio n spectroscopy (optical, x-ray, neutron, etc).