Abstract
We have experimentally studied the UV radiation of a low-temperature barrier discharge plasma in an Ar-H2O mixture. The spectral interval 300–400 nm has been examined in detail. Addition of argon with a pressure of 24 kPa to a barrier discharge in water vapor at a pressure of ∼0.1 kPa leads to a ninefold increase in the UV radiation power of excited hydroxyl molecules. An increase in the duration of the UV radiation pulse of the mixture in the longitudinal discharge decay has been achieved for the first time, which may be direct evidence of energy transfer from metastable argon atoms to water molecules. An estimate of the upper boundary of the dissociative excitation rate constant of hydroxyl molecules OH*(A 2Σ+) upon interaction of metastable argon atoms with water molecules has been obtained.
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Original Russian Text © A.A. General, V.A. Kel’man, Yu.V. Zhmenyak, Yu.O. Shpenik, M.S. Klenovskii, 2013, published in Optika i Spektroskopiya, 2013, Vol. 114, No. 1, pp. 28–32.
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General, A.A., Kel’man, V.A., Zhmenyak, Y.V. et al. Emission characteristics of a barrier discharge in an Ar-H2O mixture. Opt. Spectrosc. 114, 25–29 (2013). https://doi.org/10.1134/S0030400X13010104
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DOI: https://doi.org/10.1134/S0030400X13010104