Wavelength Shift of Spectrum Lines in Spark Spectra

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Abstract
The subject of the paper is a study of the wavelength shift of the spectrum lines in transient spark discharges. Since the wavelength shift is a function of the excitation energy, the investigations were carried out by time-resolved spectra. The time resolution was effectuated with the aid of a rotating mirror, which images the spark produced by an electronically controlled high-precision source on the slit of a stigmatic spectrograph. The spectra of the elements Zn, Cd, Hg, and Mg of the second column of the periodic system were investigated. Lines corresponding to different electronic transitions exhibit different wavelength shifts. Measurements of the wavelength shifts are given and agree with the magnitude of the shifts estimated theoretically.