| Abstract: | Relative populations of the excited levels for Cr(I), Cr(II), Fe(I) and Fe(II) in the argon plasma flow of an arc two-jet
plasma generator used in spectrochemical analysis were measured. The range of the total energy E of excitation and ionization
was 4.5–8.0 and 12.5–16.0 eV, respectively. It is shown that the populations of atom and ion levels are linear with respect
to energy lower than E∼15 eV. For ionic lines with energy close to 15.5–16.0 eV the line intensities behave anomalously against
equilibrium values. This can be associated with charge transfer between the analyte and argon ions. Deviation of I from LTE
values increases in the plasma zones below and above the site of jet confluence, where the plasma temperature decreases.
A. P. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, 1a Favorskii St., Irkutsk,
664033, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 5, pp. 575–581, September–October, 1997. |
