Luminosity and Spectral Resolution of “Grand,” “Grand-1500,” and STE-1 Spectrometers

Abstract

We present the results of measuring the luminosity, inverse linear dispersion, and spectral resolution in the range of 235 344 nm for Grand, Grand-1500, and STE-1 spectrometers operating in combination with an electric-arc unit (“Potok”) intended for analysis of powder samples by spill-injection method and being a part of a scintillation atomic emission facility. The resolution of the Grand-1500 spectrometer is 1.5 2 times higher than that of other spectrometers thus considered. In the fifth diffraction order the resolutions of Grand and STE-1 spectrometers are almost the same while in the fourth diffraction order the resolution of Grand spectrometer is significantly better than that of STE-1. The luminosity of Grand spectrometer in the range of 240 270 nm is by an order of mag nitude higher than that of STE-1, however, in the vicinity of 342 nm the advantage decreases up to 4-fold difference. Compared to the luminosity of STE-1, the luminosity of the Grand-1500 spectrometer being slightly higher near 240 nm, becomes 2 and 5 times lower at 267 nm and 342 nm, respectively.