Radiative characteristics and kinetics of processes in low-pressure gas-discharge lamps based on a mixture of helium and iodine vapors |
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Authors: | A K Shuaibov Z T Gomoki A G Kalyuzhnaya and A I Shchedrin |
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Institution: | 1.Uzhgorod National University,Uzhgorod,Ukraine;2.Physics Institute,Kiev,Ukraine |
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Abstract: | The UV radiation of glow- and capacitive-discharge lamps based on mixtures of inert gases with iodine vapors are optimized
in the spectral range of 175–360 nm, in which working helium-iodine mixtures of different compositions are used. The most
intense spectral lines in the bactericidal region of the spectrum were the atomic lines of iodine (183.0, 206.2 nm), and in
the region of 320–360 nm, emission of the spectral band of an iodine molecule prevailed with a maximum at λ = 342 nm. For
a capacitive lamp with a casing opaque in the spectral range λ < 250 nm, the main part of the plasma emission power is concentrated
in the A′-D′ band of an iodine molecule with a maximum at 342 nm. The emission brightness of this lamp is optimized in iodine molecule
transitions depending on the partial helium pressure. We present the results of simulating the kinetics of processes in a
glow-discharge plasma in mixtures of He, Xe, and iodine vapors. We establish the dependence of the main part of the emission
intensity of the 206.2 nm spectral line of an iodine atom and the 342 nm band of an iodine molecule on the helium pressure
in a glow-discharge lamp operating on a He-I2 mixture. |
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