Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 38, Issue 16, Pages 2812-2816Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/38/16/011
Keywords
-
Categories
Ask authors/readers for more resources
Atomic oxygen is measured in a pulsed dielectric barrier discharge (DBD) using two-photon absorption laser-induced fluorescence (TALIF). The ground-level atomic oxygen is excited to the 3p P-3 state by two-photon absorption at 226 nm. Negative (-40 kV) or positive (+30 kV) pulsed DBD occurs in an O-2-N-2 mixture at atmospheric pressure. The pulse width of the DBD current is approximately 50 ns. The TALIF experiment shows that the decay rate of atomic oxygen increases linearly with 02 concentration. This result proves that atomic oxygen decays mainly by the third-body reaction, O + O-2 + M -> O-3 + M. The rate coefficient of the third-body reaction is estimated to be 2.2 x 10(-34) cm(6) s(-1) in the negative DBD and 0.89 x 10(-34) cm(6) s(-1) in the positive DBD. It is shown that the decay rate of atomic oxygen increases linearly with humidity. This can explain the well-known fact that ozone production in DBD is suppressed by increasing humidity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available