[Analysis of oxygen atmospheric band in dielectric barrier discharge at atmospheric pressure].

The emission spectra of pure oxygen in dielectric barrier discharge at atmospheric pressure were observed. Comparison between experimental and fitting spectra of oxygen A band (b 1Sigmag(+) --> X 3Sigmag(-)) (0, 0) was used to determine the gas temperature, and the electronic temperature was calculated from O I lines. The causation of oxygen A band in atmospheric dielectric barrier discharge was discussed by means of analysis of producing and quenching approaches. The result showed that the electronic temperature, (11,800+/-400) K, was much higher than the gas temperature, (650+/-20) K. The emission from a 1Deltag or A 3Sigmau(+) was not been observed, but atmospheric band with its resoluble rotational structure was measured.