Abstract
Abstract Spectra excited in a hollow cathode discharge operating at high frequency and direct currents have been studied. Samples (La2O3 and Y2O3) were placed in the copper hollow cathodes and argon was a carrier gas. The excitation temperatures of Ar I, Ar II, Cu I, Y I, Y II and La II in high frequency and direct current hollow cathode discharges have been determined and compared.
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