An excimer emitter with pumping by barrier discharge in mixtures of zink diiodide vapors with inert gases

An experimental investigation is performed of the output characteristics of an excimer lamp utilizing mixtures of zinc diiodide vapors with inert gases and excited by a barrier discharge (BD) with the repetition rate of sine voltage pulses $f\le130$ kHz. Radiation spectra of BD plasma in the range of $200$–$900$ nm with resolution of $0.05$ nm are studied, as well as the time characteristics of voltage and current and the dependence of radiation intensity on the composition of mixtures. The radiation of $\mathrm{ZnI}(B-X)$ excimer molecules is revealed with a maximum at $\lambda=602$ nm, as well as of $\mathrm I^*_2$ excimer molecules, lines of inert gases, and, in mixtures with xenon, of $\mathrm{XeI}^*$ excimer molecules. The composition and pressure of gas components of mixture are optimized. It is found that the most intense radiation of $\mathrm{ZnI}^*$ in binary mixtures is observed when helium or neon is used as buffer gas. The specific average radiation power in the visible range is $23$ mW/cm$^2$.