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Spectral characteristics of a barrier discharge in cadmium dihalide vapor-inert gas mixtures
Authors:M. M. Guivan  A. N. Malinin
Affiliation:(1) Uzhgorod National University, Uzhgorod, 88000, Ukraine
Abstract:
Spectral characteristics of a barrier-discharge plasma produced in atmospheric-pressure mixtures of cadmium diiodide and cadmium dibromide vapors with neon, krypton, and xenon at a repetition rate of sine voltage pulses up to 130 kHz are studied. The emission from the discharge is studied within the spectral range 200–900 nm with a resolution of 0.05 nm. Emission of exciplex molecules CdI(BX) and CdBr(C, BX), and cadmium and inert gas atoms is revealed, as well as emission of exciplex molecules XeI(BX, A) and XeBr(BX, A) in xenon-containing mixtures. The emission of xenon halides prevails in the spectra at a mixture temperature up to 200°C. With a further temperature increase, the emission of cadmium halides becomes dominating. It is ascertained that the most intense emissions of CdI(BX) and CdI2/CdBr2/Xe/Kr and CdBr(BX) molecules are observed, respectively, in CdI2/CdBr2/Xe/Kr and CdI2/CdBr2/Xe mixtures. The cadmium dihalide-inert gas mixtures are of interest for the use as a radiating gas in a multiwavelength and broadband excilamp emitting in the UV and visible spectral ranges.
Keywords:
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